Journal articles: 'Microstrip and DGS resonator combination'

1

Kumar, A., R. Patel, and M. V. Kartikeyan. "Investigation on Microstrip Filters with CSRR Defected Ground Structure." Advanced Electromagnetics 5, no. 2 (September 1, 2016): 28. http://dx.doi.org/10.7716/aem.v5i2.353.

Full text

Abstract:

This paper consists the design studies of complementary split ring resonator (CSRR) defected ground structure (DGS) microstrip filter with low insertion loss in the passband and high rejection in stopband with a comparison of various CSRR-DGS structure has been proposed. Various parameters of microstrip filters have been studied with CSRR-DGS such as roll off rate, bandwidth, effective inductance and capacitance. On the basis of these studies, microstrip low-pass, bandpass and dual-band bandstop filters have been designed and realized with enhanced properties of filters.

APA, Harvard, Vancouver, ISO, and other styles

2

Guan, Xuehui, Ye Yuan, Lan Song, Xiaoyan Wang, Jiuhuai Lei, Lei Zhu, and Peng Cai. "A Novel Triple-Mode Bandpass Filter Based on a Dual-Mode Defected Ground Structure Resonator and a Microstrip Resonator." International Journal of Antennas and Propagation 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/852035.

Full text

Abstract:

A novel triple-mode bandpass filter (BPF) using a dual-mode defected ground structure (DGS) resonator and a microstrip resonator is proposed in this paper. The dual-mode characteristic is achieved by loading a defected T-shaped stub to a uniform impedance DGS resonator. A uniform impedance microstrip resonator is designed on the top layer of the DGS resonator and a compact bandpass filter with three resonant modes in the passband can be achieved. A coupling scheme for the structure is given and the coupling matrix is synthesized. Based on the structure, a triple-mode BPF with central frequency of 2.57 GHz and equal ripple bandwidth of 15% is designed for the Wireless Local Area Network. Three transmission zeros are achieved at 1.48 GHz, 2.17 GHz, and 4.18 GHz, respectively, which improve the stopband characteristics of the filter. The proposed filter is fabricated and measured. Good agreements between measured results and simulated results verify the proposed structure well.

APA, Harvard, Vancouver, ISO, and other styles

3

Chen, Rong-Bin, and Xiao-Ou Ou. "A hairpin DGS resonator for application to microstrip lowpass filters." Journal of Electrical Engineering 71, no. 2 (April 1, 2020): 110–15. http://dx.doi.org/10.2478/jee-2020-0016.

Full text

Abstract:

AbstractA hairpin shaped DGS, consisting of two tilted slots with a separation angle, is studied as a unit cell in this contribution. It is further served as a microwave resonator for microstrip lowpass filter applications. Two prototype filters that respectively cascade the same unit cells and the scaled cells with a different scale ratio are analyzed. For demonstration purposes, the two prototype filters are optimally developed, fabricated and examined both from numerical simulations and from experimental validations. Results show the cascaded scaled type demonstrator features a high stopband suppression level within a wide frequency band.

APA, Harvard, Vancouver, ISO, and other styles

4

Kucukoner, E. M., A. Cinar, U. Kose, and E. Ekmekci. "Electrical Size Reduction of Microstrip Antennas by Using Defected Ground Structures Composed of Complementary Split Ring Resonator." Advanced Electromagnetics 10, no. 1 (April 10, 2021): 62–69. http://dx.doi.org/10.7716/aem.v10i1.1556.

Full text

Abstract:

In this study the effects of using defected ground structures (DGS) composed of a complementary split ring resonator (CSRR) and CSRR with dumbbell (CSRR-D) for rectangular microstrip antennas are investigated. On this aim, two different antennas, which are Antenna B having CSRR etched DGS and Antenna C having CSRR-D etched DGS are designed and fabricated in comparison with the ordinary rectangular patch antenna, which is Antenna A. In both Antennas B and C, CSRR structures are etched in the same position of the ground planes. On the other hand, another ordinary microstrip antenna, called Antenna D, is designed at resonance frequency of Antenna C. For the characterization; resonance frequencies, voltage standing wave ratios, percentage bandwidths, gains, ka values and gain radiation patterns are investigated both in simulations and experiments. The numerical analyses show that 29.39% and 44.49% electrical size reduction (ESR) ratios are obtained for Antenna B and Antenna C, respectively in comparison to Antenna A. The experimental results verify the ESR ratios with 29.15% and 44.94%. Supporting, Antenna C promises 68.12% physical size reduction (PSR) as it is compared with Antenna D. These results reveal that Antenna C is a good alternative for DGS based microstrip electrically small antennas.

APA, Harvard, Vancouver, ISO, and other styles

5

Weng, L. H., Y. C. Guo, X. Q. Chen, and X. W. Shi. "Microstrip Open Loop Resonator Bandpass Filter with DGS for WLAN Application." Journal of Electromagnetic Waves and Applications 22, no. 14-15 (January 2008): 2045–52. http://dx.doi.org/10.1163/156939308787537919.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Mohamed, Hesham A., Heba B. El-Shaarawy, Esmat A. F. Abdallah, and Hadia M. El-Hennawy. "Frequency-reconfigurable microstrip filter with dual-mode resonators using RF PIN diodes and DGS." International Journal of Microwave and Wireless Technologies 7, no. 6 (August 27, 2014): 661–69. http://dx.doi.org/10.1017/s1759078714001032.

Full text

Abstract:

This work presents a novel frequency miniaturized reconfigurable dual-mode stub-loaded resonator switchable from bandpass filter to single/double-notched bandnotch filter. The proposed filter topology employs RF PIN diodes as the switching device. Based on the odd- and even-mode equivalent circuits, the resonant characteristics of the proposed microstrip resonator are investigated. The defected ground structure pattern enhanced the performance; the 3-dB bandwidth reached 63%, with insertion loss of −0.5 dB. There was great sharpness of 55 dB in the low-frequency edge (from 1.7982 to 1.8466 GHz) and 33 dB in the high-frequency edge (from 3.4329 to 3.4995 GHz). The frequency-reconfigurable microstrip filter has been designed, fabricated, and measured for application in narrow band and ultra-wideband.

APA, Harvard, Vancouver, ISO, and other styles

7

Alqaisy, Mushtaq, Chandan Chakrabraty, Jawad Ali, and Adam R. H. Alhawari. "A miniature fractal-based dual-mode dual-band microstrip bandpass filter design." International Journal of Microwave and Wireless Technologies 7, no. 2 (April 24, 2014): 127–33. http://dx.doi.org/10.1017/s1759078714000622.

Full text

Abstract:

In this paper, a fractal-based complementary split-ring resonator (CSRR) has been introduced as a defected ground structure (DGS) in the ground plane of a dual-mode microstrip bandpass filter to produce a new compact filter with dual-band response. The conventional double square ring resonator structure is modified such that its inner ring is made with a fractal shape instead of a square. Measured and simulation results show that the resulting filter offers a dual passband response; the higher passband is attributed to the dual-mode microstrip ring structure, whereas the lower passband is as a result of the embedded CSRR DGS structure. In addition, the results show that the position of the lower passband could be varied, to a certain extent, without affecting the position of the higher passband by applying higher fractal iteration levels to the inner split ring. These features, together with the compact size the proposed filter offers, make it suitable for use in a wide variety of dual-band communication applications. Measured results, carried out on filter prototypes, have been found in agreement with those theoretically predicted.

APA, Harvard, Vancouver, ISO, and other styles

8

Gao, Mingming, Keda Xu, Jingchang Nan, and Li Wang. "Planar Microstrip UWB Bandpass Filter with Quad Notched Bands and High Selectivity." Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 14, no. 4 (June 17, 2021): 493–99. http://dx.doi.org/10.2174/2352096514666210118141959.

Full text

Abstract:

Background: This study aims at solving the problems of large design size and insufficient number of the notched band for traditional ultra-wideband (UWB) filters. A planar compact microstrip UWB bandpass filter (BPF) with quad notched bands and good selectivity is proposed using a modified multiple-mode resonator (MMR) and defected ground structure (DGS). Methods: The MMR consists of a stepped impedance stub above and two pairs of open-circuited stubs on both sides, which can generate the passband and double notched bands of UWB filter, the other two notched bands are obtained by DGS. Results: The UWB filter with quad notched bands respectively centered at 3.9 GHz, 5.7 GHz, 7.9 GHz, and 9.8 GHz is fabricated and measured. Conclusion: The measured results are basically consistent with the simulated results, which proves the correctness and practicability of the UWB filter.

APA, Harvard, Vancouver, ISO, and other styles

9

Yeo, Junho, and Jong-Ig Lee. "Design of a High-Sensitivity Microstrip Patch Sensor Antenna Loaded with a Defected Ground Structure Based on a Complementary Split Ring Resonator." Sensors 20, no. 24 (December 10, 2020): 7064. http://dx.doi.org/10.3390/s20247064.

Full text

Abstract:

A comparative study to determine the most highly sensitive resonant frequency among the first four resonant frequencies of a conventional patch antenna and defected ground structure (DGS)-loaded patch antennas using commonly used DGS geometries in the literature, such as a rectangular slit, single-ring complementary split ring resonators (CSRRs) with different split positions, and double-ring CSRRs (DR-CSRRs) with different locations below the patch, for relative permittivity measurement of planar materials was conducted. The sensitivity performance for placing the DGS on two different locations, a center and a radiating edge of the patch, was also compared. Finally, the effect of scaling down the patch size of the DGS-loaded patch antenna was investigated in order to enhance the sensitivities of the higher order resonant frequencies. It was found that the second resonant frequency of the DR-CSRR DGS-loaded patch antenna aligned on a radiating edge with a half scaled-down patch size shows the highest sensitivity when varying the relative permittivity of the material under test from 1 to 10. In order to validate the simulated performance of the proposed antenna, the conventional and the proposed patch antennas were fabricated on 0.76-mm-thick RF-35 substrate, and they were used to measure their sensitivity when several standard dielectric substrate samples with dielectric constants ranging from 2.17 to 10.2 were loaded. The measured sensitivity of the second resonant frequency for the proposed DGS-loaded patch antenna was 4.91 to 7.72 times higher than the first resonant frequency of the conventional patch antenna, and the measured performance is also slightly better compared to the patch antenna loaded with a meander-line slot on the patch.

APA, Harvard, Vancouver, ISO, and other styles

10

Cao, Xin, Zongxi Tang, Fei Wang, Yunqiu Wu, and Biao Zhang. "A New Microstrip Filter Using CRLH Structure and Defected Ground Structure in Antenna Application." International Journal of Antennas and Propagation 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/879653.

Full text

Abstract:

A new microstrip bandpass filter using composite right/left-handed (CRLH) mushroom structure with interdigital capacitors and defected ground structure (DGS) is proposed. The proposed filter uses CRLH mushroom structure working at its first negative resonance mode to create the passband and DGS to increase rejection outside the passband. Simulation and measurement results are in good agreement, and low in-band insertion loss and great out-band rejection have been achieved. It is demonstrated that the combination of CRLH mushroom structure with interdigital capacitors and DGS has succeeded in achieving excellent performance. This new filter can be applied in transmitting and receiving antennas.

APA, Harvard, Vancouver, ISO, and other styles

11

Zhang, Jin, Ruosong Yang, and Chen Zhang. "High-Performance Low-Pass Filter Using Stepped Impedance Resonator and Defected Ground Structure." Electronics 8, no. 4 (April 4, 2019): 403. http://dx.doi.org/10.3390/electronics8040403.

Full text

Abstract:

A microstrip low-pass filter (LPF) using reformative stepped impedance resonator (SIR) and defected ground structure (DGS) is proposed in this paper. The proposed filter not only possesses the advantage of high frequency selectivity of SIR hairpin LPF with internal coupling, but also possesses the large stop-band (SB) bandwidth by adjusting the number and area of DGS units. The LPF proposed in this paper possesses the properties of miniaturization, wide SB, high selectivity, and low pass-band ripple (PBR) simultaneously. The characteristic parameters of the proposed LPF is that: the pass-band (PB) is 0~2 GHz, the PBR is 0.5 dB, the SB range is from 2.4 GHz to 9 GHz when the attenuation is under 20 dB, and the maximal attenuation could reach 45 dB in the SB. The size of this proposed LPF is 0.13 λ × 0.09 λ ; λ is the corresponding wavelength of the upper PB edge frequency of 2 GHz.

APA, Harvard, Vancouver, ISO, and other styles

12

Edwar, E., M. R. Yusron, and Dharu Arseno. "X-Band Microstrip Bandpass Filter Design using Square Loop Resonator and Defected Ground Structure." Journal of Measurements, Electronics, Communications, and Systems 7, no. 1 (December 30, 2020): 1. http://dx.doi.org/10.25124/jmecs.v7i1.2037.

Full text

Abstract:

Filter is an important part in telecommunication system including in radar system. To get the better performance in selecting the signal, a ftlter must have a good Q-Factor. In this paper, an investigation of a ftlter design for synthetic radar has been successfully done. This ftlter has been designed to work at x-band using square loop resonator (SLR). A Defected Ground Structure (DGS) has been implemented to this work to increase the Q-factor of the ftlter. The result of measurement getting that the center frequency at 9.51 GHz with the bandwidth 610 MHz and PCB size of this ftlter is 22 mm x 16 mm.

APA, Harvard, Vancouver, ISO, and other styles

13

Rusdiyanto, Dian, Catur Apriono, Dian Widi Astuti, and Muslim Muslim. "BANDWIDTH AND GAIN ENHANCEMENT OF MICROSTRIP ANTENNA USING DEFECTED GROUND STRUCTURE AND HORIZONTAL PATCH GAP." SINERGI 25, no. 2 (February 10, 2021): 153. http://dx.doi.org/10.22441/sinergi.2021.2.006.

Full text

Abstract:

This research proposed microstrip antenna design using the Defected Ground Structure (DGS) and horizontal patch gap (HPG) for bandwidth and enhancement purposes. This design is to reduce the weakness of a microstrip antenna, which has small gain and narrow bandwidth. The design was simulated in CST Microwave Studio with a working frequency of 2.4 GHz. The design consists of three stages model, i.e., conventional design, DGS modification, and the combination DGS using a Horizontal Patch Gap (DGSHPG). The radius of the conventional circular patch is 16.7 mm. The substrate has 4.6 of dielectric constant, 1.6 of substrate height, and 0.025 of the loss tangent. The simulation results show that the DGS design produces more bandwidth and gain than a conventional design, where the bandwidth and gain improvement are 421.2 MHz and 1.73 dB, respectively. The DGS model is combined with a gap that separates the circular patch (DGSHPG) to achieve the optimum design. The results show the bandwidth and gain improvement of more than 50% and 18.1% compared to the DGS design, respectively. Other parameter performance also shows improvement, such as a reflection factor with -53.3 dB at the center frequency. The physical change also influences the patch’s radius, where it is reduced around 1.4 mm or 8.4% from the original design. Overall, the proposed design has succeeded in achieving bandwidth and gain enhancement and reducing the patch dimension.

APA, Harvard, Vancouver, ISO, and other styles

14

Cheng, Chien Min, Kai Huang Chen, Yuan Tai Hsieh, Fuh Cheng Jong, and Shih Fang Chen. "Develop Dual-Mode DGS Bandpass Filters Using High Quality Factor Aluminum Oxide Ceramic Substrates." Key Engineering Materials 512-515 (June 2012): 1115–18. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.1115.

Full text

Abstract:

Aluminum Oxide microwave dielectric ceramics exhibit good microwave dielectric characteristics and suitable be used in the microwave devices. In this letter, using screen-printing technique and Ag/Pd paste, a novel dual-mode 2.4 GHz microstrip bandpass filter with U-shaped defected ground structure is screen printed on the Aluminum Oxide (Al2O3, relative dielectric constant=9.8) microwave dielectric ceramic substrate. In addition, a pair of input/output microstrip lines are designed to be 50 Ω and coupled to a λ/4×λ/4 square loop resonator. And in the ground plane, a U-shaped defected ground structure is used toλ excite the degenerate modes, which can be considered as a perturbation element to control the odd-mode frequency and -3 dB bandwidth of the bandpass filter. Finally, the coupling effects between these degenerate modes are presented and detailed investigated.

APA, Harvard, Vancouver, ISO, and other styles

15

Wu, Gao-Lei, Wei Mu, Xi-Wang Dai, and Yong-Chang Jiao. "DESIGN OF NOVEL DUAL-BAND BANDPASS FILTER WITH MICROSTRIP MEANDER-LOOP RESONATOR AND CSRR DGS." Progress In Electromagnetics Research 78 (2008): 17–24. http://dx.doi.org/10.2528/pier07090301.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Salman, Maaz, Youna Jang, Jongsik Lim, Dal Ahn, and Sang-Min Han. "Novel Wilkinson Power Divider with an Isolation Resistor on a Defected Ground Structure with Improved Isolation." Applied Sciences 11, no. 9 (May 1, 2021): 4148. http://dx.doi.org/10.3390/app11094148.

Full text

Abstract:

A modified Wilkinson Power Divider is proposed in this paper that utilizes defected ground structure (DGS) in parallel with an isolation resistor. The proposed DGS section is incorporated between the output ports, and the isolation resistor is soldered in parallel with the DGS in the ground plane, instead of on the top plane as in a conventional Wilkinson power divider, to achieve improved or preferable isolation. The proposed design is comprised of two pairs of microstrip transmission lines with equal impedances and varied electrical lengths. The parameters of the main circuit and the DGS section are acquired separately. The parameters of the proposed main circuit are derived by applying conjugate matching theory. Dumbbell-shaped DGS is introduced in the ground plane between the output ports, which acts as a parallel resonator, yielding an attenuation pole at the resonant frequency that contributes to improved isolation. By applying the previous well-known circuit theory, the lumped elements of the equivalent circuit of the DGS were achieved. The physical dimensions of the equivalent circuit for the DGS section were obtained by three-dimensional EM simulation. The measured results show improved isolation, return loss and better bandwidth as compared with other similar works. Furthermore, the proposed circuits designed at resonating frequencies of 3 and 2 GHz presented comparatively good return losses, S11 of about −25.54 and −31.24 dB, respectively, and achieved improved isolations, S32 between the output ports, in an order of about −40.83 and −36.05 dB, respectively, which is rather exceptional and desirable.

APA, Harvard, Vancouver, ISO, and other styles

17

Rakesh Kumar Maurya, Pradyot Kala, Reena Pant,. "DEFECTED GROUND COPLANAR MULTI-BAND-PASS MICROSTRIP FILTER." INFORMATION TECHNOLOGY IN INDUSTRY 9, no. 1 (February 18, 2021): 64–68. http://dx.doi.org/10.17762/itii.v9i1.102.

Full text

Abstract:

This paper presents a combination of an inductive coupling technique and coplanar ground plane microstrip filter. Here, inductive coupling technique is used to overcome the unwanted radiation loss generated by the gap between the co-planar ground plane and the transmission line which improves filter characteristics. A defected ground structure (DGS) is integrated with the proposed filter to achieve a tri-bandpass characteristic (1.85, 3.53, and 5 GHz) without hampering the filter performance. The experimental results of the proposed filter are found in good agreement with simulated results.

APA, Harvard, Vancouver, ISO, and other styles

18

Ghosh, Chandan Kumar, Bappaditya Mandal, and Susanta Kumar Parui. "MUTUAL COUPLING REDUCTION OF A DUAL-FREQUENCY MICROSTRIP ANTENNA ARRAY BY USING U-SHAPED DGS AND INVERTED U-SHAPED MICROSTRIP RESONATOR." Progress In Electromagnetics Research C 48 (2014): 61–68. http://dx.doi.org/10.2528/pierc14020603.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Yeo, Junho, and Jong-Ig Lee. "High-Sensitivity Microwave Sensor Based on An Interdigital-Capacitor-Shaped Defected Ground Structure for Permittivity Characterization." Sensors 19, no. 3 (January 25, 2019): 498. http://dx.doi.org/10.3390/s19030498.

Full text

Abstract:

This study proposes a high-sensitivity microwave sensor based on an interdigital-capacitor-shaped defected ground structure (IDCS-DGS) in a microstrip transmission line for the dielectric characterization of planar materials. The proposed IDCS-DGS was designed by modifying the straight ridge structure of an H-shaped aperture. The proposed sensor was compared with conventional sensors based on a double-ring complementary split ring resonator (CSRR), a single-ring CSRR, and a rotated single-ring CSRR. All the sensors were designed and fabricated on 0.76-mm-thick RF-35 substrate and operated at 1.5 GHz under unloaded conditions. Five different standard dielectric samples with dielectric constants ranging from 2.17 to 10.2 were tested for the sensitivity comparison. The sensitivity of the proposed sensor was measured by the shift in the resonant frequency of the transmission coefficient, and compared with conventional sensors. The experiment results show that the sensitivity of the proposed sensor was two times higher for a low permittivity of 2.17 and it was 1.42 times higher for a high permittivity of 10.2 when compared with the double-ring CSRR-based sensor.

APA, Harvard, Vancouver, ISO, and other styles

20

Nurjihan, Shita Fitria, and Yenniwarti Rafsyam. "Ultra-Wideband Microstrip Bandpass Filter and Its Equivalent Circuit." IJITEE (International Journal of Information Technology and Electrical Engineering) 5, no. 2 (August 6, 2021): 52. http://dx.doi.org/10.22146/ijitee.65695.

Full text

Abstract:

Microstrip filters can be designed with various methods to obtain good performances, such as defected ground structure, open-ended slot, planar edge coupled, and split ring resonator with groundplane windowing. In this paper, the design of an ultra-wideband microstrip bandpass filter used the defected ground structure (DGS) method by adding a circular slot to the groundplane. The addition of the circular slot was carried out to improve the value of S parameter (return loss and insertion loss) from the initial filter design without a circular slot. In the simulation process, optimization was carried out by changing the value of filter component parameters such as patch length and thickness and circular slot width. The simulation results showed that the microstrip bandpass filter could pass frequencies in the range of 1.4 GHz to 5.7 GHz with the bandwidth response of 4.3 GHz. In addition, filter analysis could also be done with an equivalent circuit represented by lumped element components in the form of capacitors and inductors connected in series or parallel. The simulation results of the equivalent circuit had a wider bandwidth, which was able to pass frequencies in the range of 1.2 GHz to 6.1 GHz with a bandwidth response of 4.9 GHz.

APA, Harvard, Vancouver, ISO, and other styles

21

Yifan Wang, Amin M. Abbosh, and Bassem Henin. "Broadband Microwave Crossover Using Combination of Ring Resonator and Circular Microstrip Patch." IEEE Transactions on Components, Packaging and Manufacturing Technology 3, no. 10 (October 2013): 1771–77. http://dx.doi.org/10.1109/tcpmt.2013.2262110.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Boutejdar, Ahmed, Ahmed A. Ibrahim, and Edmund P. Burte. "Design of a Novel Ultrawide Stopband Lowpass Filter Using a DMS-DGS Technique for Radar Applications." International Journal of Microwave Science and Technology 2015 (October 15, 2015): 1–7. http://dx.doi.org/10.1155/2015/101602.

Full text

Abstract:

A novel wide stopband (WSB) low pass filter based on combination of defected ground structure (DGS), defected microstrip structure (DMS), and compensated microstrip capacitors is proposed. Their excellent defected characteristics are verified through simulation and measurements. Additionally to a sharp cutoff, the structure exhibits simple design and fabrication, very low insertion loss in the pass band of 0.3 dB and it achieves a wide rejection bandwidth with overall 20 dB attenuation from 1.5 GHz up to 8.3 GHz. The compact low pass structure occupies an area of (0.40λg × 0.24λg) where λg = 148 mm is the waveguide length at the cut-off frequency 1.1 GHz. Comparison between measured and simulated results confirms the validity of the proposed method. Such filter topologies are utilized in many areas of communications systems and microwave technology because of their several benefits such as small losses, wide reject band, and high compactness.

APA, Harvard, Vancouver, ISO, and other styles

23

Raviteja, G. Viswanadh, B. T. V. Madhan, M. Kshetra Sree, N. Avinash, and P. R. S. Naga Surya. "Gain and Bandwidth Considerations for Microstrip Patch Antenna Employing U and Quad L shaped Slots with DGS and Parasitic Elements for WiMax / WiFi Applications." European Journal of Engineering Research and Science 5, no. 3 (March 19, 2020): 327–30. http://dx.doi.org/10.24018/ejers.2020.5.3.1834.

Full text

Abstract:

In this research article, a microstrip patch antenna for Wireless Applications is presented. Stage by stage, the antenna is modified to achieve the desired wideband characteristics. The final proposed antenna is a combination of U and Quad L shaped slots with L shaped DGS and U shaped dual parasitic elements. Parameters S11, bandwidth and gain of the antenna versions during each stage are noted and steps are taken to improve these parameters. The end result is a wideband microstrip patch antenna working in the frequency range of 4.75 GHz to 6.15 GHz with a bandwidth of 1.40 GHz. The peak gain observed is about 7.24 dB at 5.64 GHz frequency. Simulations are carried out using HFSS software. The obtained results show that the proposed antenna can be extensively for WiFi (4.9 GHz to 5.9 GHz) and WiMax (5.3 GHz to 5.8 GHz) Applications.

APA, Harvard, Vancouver, ISO, and other styles

24

Sallehuddin, Nur Fazreen, Mohd Haizal Jamaluddin, Muhammad Ramlee Kamarudin, Muhammad Hashim Dahri, and Siti Umairah Tajol Anuar. "Dielectric Resonator Reflectarray Antenna Unit Cells for 5G Applications." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 4 (August 1, 2018): 2531. http://dx.doi.org/10.11591/ijece.v8i4.pp2531-2539.

Full text

Abstract:

This paper presents an investigation for the performance comparison of three different unit cell configurations operating at 26 GHz for 5G applications. The unit cells are cross shape dielectric resonator, cross microstrip patch and cross hybrid dielectric resonator. Verification of the comparison has been done by simulations using commercial Computer Simulation Technology Microwave Studio (CST MWS). The simulated results for reflection phase, slope variation, reflection loss and 10% bandwidth were analyzed and compared. The results indicate that the optimum configuration to be deployed for the reflectarray’s unit element in order to fulfill the 5G requirements of a wide bandwidth is the cross hybrid DRA. This configuration is a combination of cross DRA with cross microstrip patch as the parasitic element in order to tune the phase and provide a wide phase range with smooth variation slope. Cross hybrid DRA provided a wide phase range of 520° with 0.77 dB loss and 10% bandwidth of 160 MHz.

APA, Harvard, Vancouver, ISO, and other styles

25

Mirmosaei, Seyed Saeed, Seyed Ebrahim Afjei, Esfandiar Mehrshahi, and Mohammad M. Fakharian. "A dual band-notched ultra-wideband monopole antenna with spiral-slots and folded SIR-DGS as notch band structures." International Journal of Microwave and Wireless Technologies 8, no. 8 (April 27, 2015): 1197–206. http://dx.doi.org/10.1017/s1759078715000719.

Full text

Abstract:

In this paper, an ultra-wideband (UWB) planar monopole antenna with impedance bandwidth from 2.83 to 11.56 GHz and dual band-notched characteristics is presented. The antenna consists of a small rectangular ground plane, a bat-shaped radiating patch, anda 50-Ω microstrip line. The notched bands are realized by introducing two different types of structures. The half-wavelength spiral-slots are etched on the radiating patch to obtain a notched band in 5.15 5.925 GHz for WLAN, HIPERLAN, and DSRC systems. Based on the single band-notched UWB antenna, the second notched band is realized by etching a folded stepped impedance resonator as defected ground structure on the ground plane for WiMAX and C-band communication systems. The notched frequencies can be adjusted by altering the length of resonant cells. Surface current distributions and equivalent circuit are used to illustrate the notched mechanism. The performance of this antenna both by simulation and by experiment indicates that the proposed antenna is suitable and a good candidate for UWB applications.

APA, Harvard, Vancouver, ISO, and other styles

26

Sazali, M. A., N. A. Shairi, and Z. Zakaria. "Hybrid Microstrip Diplexer Design for Multi-band WiMAX Application in 2.3 and 3.5 GHz Bands." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 1 (February 1, 2018): 576. http://dx.doi.org/10.11591/ijece.v8i1.pp576-584.

Full text

Abstract:

In this paper, a design of hybrid microstrip diplexer is proposed for multi-band Worldwide Interoperability for Microwave Access (WiMAX) application in 2.3 and 3.5 GHz bands. The diplexer consists of a combination of two different filter designs. These filters were designed based on microstripline coupling techniques in order to obtain minimum insertion losses and achieve the desired frequency bandwidth. Therefore, a coupled open loop ring resonator was chosen for the filter design in 2.3 GHz band and a folded coupled line resonator was chosen for the filter design in 3.5 GHz band. Then, these filters were combined with a ring manifold matching network to be a hybrid microstrip diplexer. Based on the results, good agreements were achieved between the simulation and measurement results in terms of insertion loss, return loss and bandwidth in the 2.3 and 3.5 GHz bands.

APA, Harvard, Vancouver, ISO, and other styles

27

Khan, S. N., Q. L. Zhang, and S. He. "Left Handed Microstrip Transmission Line Loaded with Combination of Split Ring Resonator and Complementary-SRR." Journal of Electromagnetic Waves and Applications 22, no. 13 (January 2008): 1857–63. http://dx.doi.org/10.1163/156939308786375109.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Altaf, Amir, and Munkyo Seo. "Triple-Band Dual-Sense Circularly Polarized Hybrid Dielectric Resonator Antenna." Sensors 18, no. 11 (November 12, 2018): 3899. http://dx.doi.org/10.3390/s18113899.

Full text

Abstract:

In this paper, a triple-band dual-sense circularly polarized (CP) hybrid dielectric resonator antenna is proposed. A modified hexagonal dielectric resonator (DR) is top-loaded with a square microstrip ring (SMR). A vertical-tapered-strip connected to a 50- Ω microstrip line is used to excite the proposed antenna. It is found that the lower and central CP bands correspond to left-handed circular polarization and are produced by the TM 11 and TE 111 modes of the SMR and modified hexagonal DR, respectively. The upper CP band is formed by the combination of the quasi-TM 21 mode of the SMR and quasi-TE 111 mode of the DR that exhibits right-handed circular polarization. The measurement results of the fabricated prototype show triple-band response for |S 11 | < −10 dB with impedance bandwidths (IBWs) of 17.4% (1.75–2.03 GHz), 28.13% (2.23–2.96 GHz), and 2.97% (3.65–3.76 GHz) in the lower, central, and upper bands, respectively. The measured 3 dB axial ratio bandwidths lying within −10 dB IBWs are 3.69% (1.86–1.93 GHz), 5.46% (2.67–2.82 GHz), and 2.15% (3.68–3.76 GHz) along with the peak gains of 5 dBic, 5.28 dBic, and 2.36 dBic in the lower, central, and upper bands, respectively.

APA, Harvard, Vancouver, ISO, and other styles

29

Tizyi, Hafid, Fatima Riouch, Abdelwahed Tribak, Abdellah Najid, and Angel Mediavilla. "Microstrip diplexer design based on two square open loop bandpass filters for RFID applications." International Journal of Microwave and Wireless Technologies 10, no. 4 (March 12, 2018): 412–21. http://dx.doi.org/10.1017/s1759078718000314.

Full text

Abstract:

AbstractIn this work, a simple and efficient approach to design a microstrip diplexer is proposed. It is based on the combination of two compact Square Open Loop Resonator band pass filters. These filters are designed for Radio Frequency Identification application at 2.45 GHz frequency. Using the Chebychev approximation, the two filters and diplexer are designed, simulated, fabricated, and measured. The results show that the diplexer presents a high selectivity, a good insertion loss and high isolation (>40 dB) with the compact size. The diplexer also shows a good performance when associated with the patch antenna operating at 2.45 GHz.

APA, Harvard, Vancouver, ISO, and other styles

30

Prasad, L., B. Ramesh, K. S. R. Kumar, and K. P. Vinay. "Design and Implementation of Multiband Microstrip Patch Antenna for Wireless Applications." Advanced Electromagnetics 7, no. 3 (August 19, 2018): 104–7. http://dx.doi.org/10.7716/aem.v7i3.646.

Full text

Abstract:

Multiband phased array antennas are required for today’s multi-function communication applications. Generally Microstrip antenna arrays like Kotch array, Sierpinski array are used, but in some circuits where space is limited, arrays are not used. Therefore, to achieve the multiband operation with limited space, an antenna is designed with E-shaped in combination with split ring resonator to achieve the multiband operation. The simulation and experimental results show that the proposed antenna operates at four different frequencies, 1.8GHz, 3.6GHz, 4.53GHz and 5.73GHz, which can be used for different wireless applications like GSM 1800 (1.71– 1.78 GHz), WiMAX (3.4-3.69GHz) -IEEE 802.16 standards, Wi-Fi/WLAN (5.15-5.82 GHz). All the simulation results like resonant frequency, return loss, radiation patterns and fabricated antenna measured result is presented in this paper. The antenna is simulated using CST 2014 software.

APA, Harvard, Vancouver, ISO, and other styles

31

Tang, Yi Jun, Bing Liu, Yong Fu, Fang Zhu, Dan Shen, Ya Wei Liu, and Yi Pan Zhou. "High Isolation and Compact Microstrip Diplexer for Broadband and WLAN Application." Applied Mechanics and Materials 543-547 (March 2014): 2888–92. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.2888.

Full text

Abstract:

A high isolation and compact microstrip diplexer for broadband and wireless local area network (WLAN) application is proposed in this paper. It is achieved by using the combination of a broadband bandpass filter (BPF) composed of one open stub and two short stubs of different size loaded in 50Ω feed lines. The tapped stub can not only generate two zeros to deepen the stopband, but also connect other BPF without deterioration of in-band performance. Hence, the compact diplexer combines two BPFs without extra junction matching network. The mutual loading effect approximately equivalent to a coupled resonator can create one zero at the passband edge to improve the isolation. The proposed microstrip diplexer is designed and fabricated, and it has a 1dB fractional bandwidths (FBW) of 60% at 3.5GHz for broadband channel and 3% at 5.8GHz for WLAN channel . The simulated and measured results are presented and good agreement is obtained.

APA, Harvard, Vancouver, ISO, and other styles

32

Seyyedhatami, Seyyed Hadi, and Ramazan Ali Sadeghzadeh. "A new simple compact ultra-wideband dielectric resonator antenna with enhanced bandwidth and improved radiation pattern." International Journal of Microwave and Wireless Technologies 8, no. 2 (January 26, 2015): 335–40. http://dx.doi.org/10.1017/s1759078715000021.

Full text

Abstract:

A new simple compact ultra-wideband (UWB) dielectric resonator antenna is presented. The antenna consists of a modified stepped microstrip-fed monopole printed antenna loaded with a rectangular dielectric resonator, truncated ground plane, and a parasitic strip underneath the dielectric resonator (DR). Using an optimized truncated ground plane and a combination of stepped feed line with DR an ultra-wide impedance bandwidth of 153% for (∣S11∣ ≤ −10 dB), covering the frequency range of (3.7–28 GHz) is achieved. The added parasitic strip can improve the radiation pattern, especially at high frequencies. The proposed antenna covers almost the entire UWB (3.1–10.6 GHz), Ku (12.4–18 GHz), and K (18–26.6 GHz) frequency bands. Also this antenna has an omnidirectional and stable radiation pattern over the whole operating frequency range and a compact size of (15 × 20 × 5.8 mm3) that make it suitable for wideband wireless system applications. This structure is light weight and can be easily fabricated. A prototype is built and measured. The simulated and measured results are in good agreement.

APA, Harvard, Vancouver, ISO, and other styles

33

Dash, Sounik Kiran Kumar, Taimoor Khan, Binod Kumar Kanaujia, and N. Nasimuddin. "Wideband Cylindrical Dielectric Resonator Antenna Operating in HEM11δ Mode with Improved Gain: A Study of Superstrate and Reflector Plane." International Journal of Antennas and Propagation 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/2414619.

Full text

Abstract:

A wideband and high gain dielectric resonator antenna (DRA) operating in hybrid HEM11δ mode is proposed. The investigated geometry employs one cylindrical dielectric resonator partially covered with a transparent dielectric superstrate and backed up by a single side metal coated dielectric reflector plane. The reflector is dedicated for gain enhancement while the superstrate is employed for merging of two resonant bands resulting in a single wide band. The dielectric resonator is excited by simple microstrip feed slot coupling technique and operates over X-band, ranging from 7.12 GHz to 8.29 GHz, that is, of 15.18% impedance matching bandwidth with 11.34 dBi peak gain. The different development stages like standalone DRA, DRA with superstrate, DRA with reflector, and DRA with both superstrate and reflector plane with respect to bandwidth and gain performances are analyzed properly. To the best of authors’ knowledge, this is the first time this type of combination of both superstrate and reflector plane is demonstrated in DRA engineering. An antenna prototype was fabricated and characterized and a very good agreement is achieved between the simulated and measured results.

APA, Harvard, Vancouver, ISO, and other styles

34

Sedghi, Mohammad Sadegh, Mohammad Naser-Moghadasi, and Ferdows B. Zarrabi. "Microstrip antenna miniaturization with fractal EBG and SRR loads for linear and circular polarizations." International Journal of Microwave and Wireless Technologies 9, no. 4 (June 23, 2016): 891–901. http://dx.doi.org/10.1017/s1759078716000726.

Full text

Abstract:

In this paper, combination of electromagnetic band gap (EBG) and split-ring resonator (SRR) loads with fractal formation for miniaturization of microstrip antenna is noticed. Here two different shapes of antenna have been studied with two well-known metamaterial structures as parasitic elements. A conventional microstrip antenna, which is surrounded by four EBG unit cells, is chosen as the first antenna. It has an effective resonance at 2.5. The Minkowski fractal method is applied to EBG unit cells in this stage. The Minkowski fractal structure is implemented for accession of effective capacitance in EBG unit cells. The second antenna frequencies are 2.5 and 5.9 GHz. It contains a slot structure with four SRRs, used for making parasitic elements and for achieving multi-band characteristic. The fractal method is used to improve the inductance of SRR structure by increasing the effective length of microstrip line. At this stage, the applied fractal structure has been modified, so that the frequency of wireless application could be achieved. In the last step, by some changes in feed line of the slot antenna, circular polarization (CP) is obtained for the second antenna, which shows that SRR load can be helpful for making the CP.

APA, Harvard, Vancouver, ISO, and other styles

35

Xu, Jiachen, Bozhang Lan, Jiakai Zhang, Chenjiang Guo, and Jun Ding. "A novel dual-band dual-polarized shared-aperture antenna with high isolation." International Journal of Microwave and Wireless Technologies 12, no. 7 (May 4, 2020): 652–59. http://dx.doi.org/10.1017/s1759078719001454.

Full text

Abstract:

AbstractThis paper presents a novel dual-band (DB) dual-polarized (DP) shared aperture antenna with high isolation by using a combination of microstrip dipoles and dielectric resonator antennas (DRAs) for S and C bands, respectively. In the S band, two sets of proximity coupled stacked microstrip dipoles which crossed at the center are employed to achieve dual-linear polarization (DLP) and obtain desired bandwidth (BW), isolation, and pure polarization. The rectangle DRA with hybrid feed is selected as the C band element for its advantages of small base area and high isolation, and a 2 × 2 array is presented with the “pair-wise” anti-phase feed technique to achieve a low cross-polarized level. Moreover, benefited from the back feed scheme, the proposed antenna has a symmetrical structure and has the potential of expanding into a larger aperture. The proposed antenna has been manufactured and measured, and the results agree well with simulations, which prove the validity of the proposed design.

APA, Harvard, Vancouver, ISO, and other styles

36

Rahman, MuhibUr, Mahdi NaghshvarianJahromi, Seyed Mirjavadi, and Abdel Hamouda. "Bandwidth Enhancement and Frequency Scanning Array Antenna Using Novel UWB Filter Integration Technique for OFDM UWB Radar Applications in Wireless Vital Signs Monitoring." Sensors 18, no. 9 (September 19, 2018): 3155. http://dx.doi.org/10.3390/s18093155.

Full text

Abstract:

This paper presents the bandwidth enhancement and frequency scanning for fan beam array antenna utilizing novel technique of band-pass filter integration for wireless vital signs monitoring and vehicle navigation sensors. First, a fan beam array antenna comprising of a grounded coplanar waveguide (GCPW) radiating element, CPW fed line, and the grounded reflector is introduced which operate at a frequency band of 3.30 GHz and 3.50 GHz for WiMAX (World-wide Interoperability for Microwave Access) applications. An advantageous beam pattern is generated by the combination of a CPW feed network, non-parasitic grounded reflector, and non-planar GCPW array monopole antenna. Secondly, a miniaturized wide-band bandpass filter is developed using SCSRR (Semi-Complementary Split Ring Resonator) and DGS (Defective Ground Structures) operating at 3–8 GHz frequency band. Finally, the designed filter is integrated within the frequency scanning beam array antenna in a novel way to increase the impedance bandwidth as well as frequency scanning. The new frequency beam array antenna with integrated band-pass filter operate at 2.8 GHz to 6 GHz with a wide frequency scanning from the 50 to 125-degree range.

APA, Harvard, Vancouver, ISO, and other styles

37

Muñoz-Enano, Jonathan, Jesús Martel, Paris Vélez, Francisco Medina, Lijuan Su, and Ferran Martín. "Parametric Analysis of the Edge Capacitance of Uniform Slots and Application to Frequency-Variation Permittivity Sensors." Applied Sciences 11, no. 15 (July 29, 2021): 7000. http://dx.doi.org/10.3390/app11157000.

Full text

Abstract:

This paper presents a parametric analysis relative to the effects of the dielectric constant of the substrate, substrate thickness and slot width on the edge capacitance of a slot-based resonator. The interest is to find the conditions (ranges of the previously cited parameters) compatible with the presence of a quasi-magnetic wall in the plane of the slot (or plane of the metallization). If such magnetic wall is present (or roughly present), the electric field in the plane of the slot is tangential (or quasi-tangential) to it and the edge capacitance can be considered to be the parallel combination of the capacitances at both sides of the slot. Moreover, variations in one of such capacitances, e.g., caused by a change in the material on top of the slot, or by a modification of the dielectric constant of the substrate do not affect the opposite capacitance. Under the magnetic wall approximation, the capacitance of certain electrically small slot-based resonators can be easily linked to the dielectric constant of the material present on top of it. The consequence is that such resonators can be used as sensing elements in a permittivity sensor and the dielectric constant of the so-called material under test (MUT) can be determined from the measured resonance frequency and a simple analytical expression. In this paper, the results of this parametric analysis are validated by considering several sensing structures based on dumbbell defect ground structure (DB-DGS) resonators of different dimensions.

APA, Harvard, Vancouver, ISO, and other styles

38

Hayati, M., AS Abdipour, and AR Abdipour. "A novel compact lowpass filter with sharp roll-off and wide stopband." International Journal of Microwave and Wireless Technologies 12, no. 1 (August 8, 2019): 21–33. http://dx.doi.org/10.1017/s175907871900103x.

Full text

Abstract:

AbstractIn this paper, a microstrip lowpass filter adopting two main resonators with steep transition band and wide rejection band has been introduced. The first main resonance cell consists of meandered transmission lines which are loaded by modified T-shaped patches. The second main resonator is composed of high-impedance lines loaded by polygon patches. To obtain a steep skirt performance, the first and second resonators have been combined. Moreover, employing eight high–low impedance folded stubs and two rectangular open-stubs as suppressing cells has resulted in improving the stopband features. To comprehend the frequency behavior of the employed resonators and also their combination, the formulas of the transmission coefficient, reflection coefficient, and the transmission zeros of their equivalent LC circuits have been extracted, separately. According to the measurement results, the −3 dB operating frequency of this filter is 1.65 GHz. Moreover, a relative stopband bandwidth equal to 166% with a corresponding attenuation level of 23 dB and a sharp roll-off rate (393.61 dB/GHz) have been achieved. In the passband region from DC to 1.632 GHz, the insertion loss and return loss are better than 0.0763 and 15.85 dB, respectively, proving an acceptable in-band performance. Finally, the implemented structure brings about a high figure-of-merit equal to 81 672.

APA, Harvard, Vancouver, ISO, and other styles

39

Gnanaharan, I., and R. Anbazhagan. "Review on the Design of the Isolation Techniques for UWB-MIMO Antennas." Advanced Electromagnetics 7, no. 4 (August 31, 2018): 46–70. http://dx.doi.org/10.7716/aem.v7i4.743.

Full text

Abstract:

Ultra wide band - Multiple Input Multiple Output antenna technology provides higher data rates and the combination of the ultra wide band (UWB) and the multiple input multiple output (MIMO) technologies provides a solution for the demand of still higher data rates i.e. in excess of 3 Gb/sec in the future. As the antenna technologies are improving, the size of the MIMO antenna is growing smaller and smaller. Placing the antenna elements in such close proximity increases the coupling between them. Various isolation techniques have to be introduced between the antenna elements to decrease the coupling and to improve the isolation. A study of the various isolation enhancement techniques have been made in this review. It analyses the various isolation enhancement methods such as using orthogonal polarization, parasitic elements, varied decoupling structures, defected ground structures (DGS), neutralization line (NL) and finally by using metamaterials. Metamaterials is a technology to perk up the isolation between the antenna elements. Split ring resonator (SRR) behaves as a metamaterial and it is used as an isolation mechanism in this study. The antennas are simulated and the results are compared. The method using parasitic elements gives the highest isolation of 35 dB and it is 5 dB better than the methods using orthogonal polarization and using the decoupling structure. The performance of all the antennas satisfies the conditions for minimum isolation. The envelope correlation coefficient is nearly zero in all the antennas and it implies good diversity performance. The diversity gain is also calculated for the various antennas and it satisfies good diversity performance. The bandwidth of the antennas is in the UWB frequency range and they have a fractional bandwidth above the required value of 1.09. The capacity loss for all the antennas is very low and the antennas using defected ground structure and the decoupling structure gives very low capacity loss.

APA, Harvard, Vancouver, ISO, and other styles

40

Vidhya, K. "Performance Enhancement Of Microstrip Hairpin Band Pass FilterUsing Dumbbell DGS and Split Ring Resonator DGS." International Journal of Information and Electronics Engineering, 2011. http://dx.doi.org/10.7763/ijiee.2011.v1.9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

"A CSRR DGS Loaded Dual-Frequency Microstrip Antenna in Ground Plane for Application in PCS And WLAN Communication System." International Journal of Recent Technology and Engineering 8, no. 6 (March 30, 2020): 1065–72. http://dx.doi.org/10.35940/ijrte.f7525.038620.

Full text

Abstract:

In this paper, a rectangular microstrip antenna which is inset-fed by the microstrip line with a complementary split ring resonator (CSRR) defected ground structure (DGS) cell in the ground plane just below the microstrip line (substrate present in between) for the dual frequency operation at 1.92 GHz and 5.22 GHz is presented, which are the operation bands of personal communication system (PCS) and wireless local area network (WLAN) respectively. The fundamental mode TM10 and one strongly activated higher order mode are excited which are responsible for the dual-band operation. Smaller broadside radiation and same polarization planes are the characteristics of these modes.

APA, Harvard, Vancouver, ISO, and other styles

42

R, Aruna, and Sreegiri S S. "Fractal Antenna Based on Split Ring Resonators with Defected Ground Structure." International Journal of Scientific Research in Computer Science, Engineering and Information Technology, July 10, 2020, 110–17. http://dx.doi.org/10.32628/cseit206430.

Full text

Abstract:

In this paper presents the design of a circular microstrip fractal antenna (CMFA) loaded with parasitic edge-coupled (EC) split ring resonators (SRR) and defected ground structure (DGS). The basic resonant structure is a circular patch antenna designed at 3.2 GHz on FR4 substrate with relative permittivity 4.4, and 1.6 mm thickness. One iteration of circular patch and slots is employed to form it fractal and so as to attain multiband performance, the antenna is inset fed by a 50? microstrip line. Further the work is extended to demonstrate the effect of placing split ring resonator to particular position of substrate, improves the impedance matching leading to improved bandwidth. In addition L shaped defected ground structures are used to improve the antenna performance. . A comparison between fractal antenna with and without SRRs and DGS is made and the results verifies that a better gain improvement and return loss. The dimensions of the antenna are 45 mm x 45 mm and it can be used for ultra wide band (UWB) applications.

APA, Harvard, Vancouver, ISO, and other styles

43

"Detection of Water Quality using Defected Ground Double Split Ring Resonator." International Journal of Recent Technology and Engineering 8, no. 4 (November 30, 2019): 12207–9. http://dx.doi.org/10.35940/ijrte.d7595.118419.

Full text

Abstract:

Water is an essential thing for life. Now days due to population growth and pollution, the quality of water is degraded. In this paper, a single element double split ring resonator (DSRR) has been presented as a sensor to detect the quality of water. Here, two square shape metallic split rings are designed along with the microstrip line. On the back side of the substrate, defected ground structure (DGS) is introduced. The resonant frequency of the resonator is 11.12 GHz. Quality of water is detected by the shift in S21 resonant frequency with the variation in transmission coefficient. This sensor can be used in our daily life to detect the quality of water and it may be useful in medical field also

APA, Harvard, Vancouver, ISO, and other styles

44

"Design of Microstrip Patch Antenna with Enhanced Bandwidth and Harmonic Suppression for Wlan Applications." International Journal of Recent Technology and Engineering 8, no. 5 (January 30, 2020): 1642–45. http://dx.doi.org/10.35940/ijrte.e6163.018520.

Full text

Abstract:

A parallel combination of pair of λ/4 Resonator and the rectangular patch has enhanced the bandwidth and suppressed the unwanted harmonic radiations of the proposed antenna. Due to electromagnetic coupling effect, the pair of λ/4 resonator excites the radiating patch. Both λ/4 resonator and resonating patch excites at two different frequencies which are close to each other and this helps to increase the bandwidth of a proposed antenna. Also a shorting pin is used between the two λ/4 resonators which suppress the unwanted harmonic radiations. Design of a proposed antenna is done using the HFSS (High Frequency Simulation software). The Hardware results are observed on VNA (Virtual Network Analyzer).The operating frequency 3.6GHz.The proposed antenna is used in WLAN applicatio

APA, Harvard, Vancouver, ISO, and other styles

45

Sharifi, Alireza. "Designing 6–18 GHz Microstrip Filters with Removing Unwanted Upper and Lower Band Frequency Responses and with Arbitrary Load Impedance Matching." Journal of Circuits, Systems and Computers, December 16, 2020, 2150131. http://dx.doi.org/10.1142/s0218126621501310.

Full text

Abstract:

In this paper, Ultra-Wideband (UWB) filters at 6–18[Formula: see text]GHz are designed that can reduce undesired frequency responses at lower and upper frequency bands to less than [Formula: see text]20[Formula: see text]dB. Arbitrary load impedances are considered in the design of these filters. The structure of these filters is the combination of microstrip band-pass filters and Defected Ground Structures (DGSs) with multiple sections. The optimum circuit dimensions are calculated using a computer code which implements the Least Mean Squares (LMS) optimization method. Two design examples are included to illustrate this method. In these examples, eight-section DGS structures are employed to eliminate the unwanted upper frequency band responses. To ensure the correct performance of the designed filters, they are analyzed using full-wave methods and fabrication and the results of the measurement or full-wave analysis shows good agreement with the results of the computer code and the circuit model simulations.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Microstrip and DGS resonator combination'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles