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Journal articles on the topic 'Complementary antenna'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

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.

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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.

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2

Rajni, Rajni, Gursharan Kaur, and Anupma Marwaha. "Metamaterial Inspired Patch Antenna for ISM Band by Adding Single-Layer Complementary Split Ring Resonators." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 6 (December 1, 2015): 1328. http://dx.doi.org/10.11591/ijece.v5i6.pp1328-1335.

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In this work, we propose the design of metamaterial inspired compact circular patch antennas loaded with complementary split-ring resonators (CSRRs) for ISM band operation. CSRRs have been incorporated horizontally inside the dielectric. The various models of CSRR loaded antennas with different patch radius are produced and are evaluated numerically with Ansoft HFSS software. The results of the suggested antenna designs are presented that reveal a comparable impedance match and radiation characteristics with those of a normal patch antenna without CSRR. The proposed antennas yield high levels of miniaturization and similar performance to the conventional patch antenna at the 2.45GHz.

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3

Najafy, Vahid, and Mohammad Bemani. "Mutual-coupling reduction in triple-band MIMO antennas for WLAN using CSRRs." International Journal of Microwave and Wireless Technologies 12, no. 8 (March 19, 2020): 762–68. http://dx.doi.org/10.1017/s1759078720000215.

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AbstractFor the requirements of low mutual-coupling MIMO antennas for WLAN, a new complementary split-ring resonator (CSRR) unit cell is introduced in this paper. A microstrip-fed Vivaldi antenna array is designed for WLAN applications, where compact triple-band gap-complementary split-ring resonator unit cells are loaded between two antennas to examine the effect of unit cells on the rate of mutual-coupling reduction. By inserting the CSRR, the final design offered an improvement in decoupling by 8.5, 10.5, and 18 dB at 3.65, 4.9, and 5.8 GHz, respectively, compared with the reference antenna. By suppressing surface waves, antenna gain and front-to-back ratio are improved.

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4

P.A. Ambresh, P. A. Ambresh, and P. M. Hadalgi P. M. Hadalgi. "Complementary E-Shape Microstrip Patch Antenna for Wireless Applications." Indian Journal of Applied Research 1, no. 3 (October 1, 2011): 77–78. http://dx.doi.org/10.15373/2249555x/dec2011/27.

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5

Rajesh Kumar, Narayanasamy, Palan Sathya, Sharul Rahim, Muhammed Nor, Akram Alomainy, and Akaa Eteng. "Compact Tri-Band Microstrip Patch Antenna Using Complementary Split Ring Resonator Structure." Applied Computational Electromagnetics Society 36, no. 3 (April 20, 2021): 346–53. http://dx.doi.org/10.47037/2020.aces.j.360314.

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In this letter, a compact complementary split ring based tri-band antenna is proposed. The proposed antenna resonates at 1.9 GHz (1.70-1.91 GHz), 2.45 GHz (2.23-2.52 GHz) and 3.2 GHz (2.9-3.25 GHz); the input match values are 24.56 dB, 27.21 dB and 22.46 dB, respectively. The antenna’s realised peak gain is 4.15 dBm at 1.9 GHz, 4.25 dBm at 2.4 GHz and 4.74 dBm at 3.2 GHz, with approximately 42% of reduction in antenna size. The results demonstrate that the proposed metamaterial antenna is tunable, electrically small and highly efficient, which makes it a suitable candidate for RF energy harvesting. The antenna is numerically and experimentally analysed and validated with very good comparison between the simulated and measured results.

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6

Tung, Phan Duy, Phan Huu Lam, and Nguyen Thi Quynh Hoa. "A MINIATURIZATION OF MICROSTRIP ANTENNA USING NEGATIVE PERMITIVITY METAMATERIAL BASED ON CSRR-LOADED GROUNDFOR WLAN APPLICATIONS." Vietnam Journal of Science and Technology 54, no. 6 (December 7, 2016): 689. http://dx.doi.org/10.15625/0866-708x/54/6/8375.

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A microstrip antenna using negative index metamaterial based on complementary split ring resonator (CSRR)-loaded ground has been investigated in order to miniaturize the size and improve the antenna characteristics. The proposed antennas are designed on FR4 material and simulated results are provided by HFSS software. The metamaterial antenna was reduced 75 % the overall size compared to the normal microstrip antenna. Furthermore, compared with the normal microstrip antenna, the antenna characteristics of the metamaterial antenna were improved significantly. The proposed metamaterial antenna exhibited the antenna resonate at 2.45 GHz, the gain of higher than 6.5 dB and the bandwidth of 110 MHz through the whole WLAN band. The obtained results indicated that the proposed antenna is a good candidate for WLAN applications.

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7

Zeng, Qinghao, Yuan Yao, Shaohua Liu, Junsheng Yu, Peng Xie, and Xiaodong Chen. "Tetraband Small-Size Printed Strip MIMO Antenna for Mobile Handset Application." International Journal of Antennas and Propagation 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/320582.

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A compact printed multiple-input multiple-output (MIMO) antenna for tetraband (GSM900/1800/1900/UMTS) mobile handset application is presented. The proposed MIMO antenna, which consists of two coupled-fed loop antennas with symmetrical configuration, was printed on a 120 * 60 * 0.8 mm3Fr-4 substrate of relative permittivity of 4.4, loss tangent 0.02. Each element antenna requires only a small area of 22.5 * 25 mm2on the circuit board. The edge-to-edge spacing between the two elements is only0.03λ0of 920 MHz. A slot and a dual-inverted-L-shaped ground branch were added in the ground plane to decrease the mature coupling between the antenna elements. The measured isolation of the proposed antenna is better than 15 dB among the four operating frequency bands. The simulated 3D radiation patterns at 900 MHz and 1900 MHz of both antenna elements show that two loop antennas in general cover complementary space regions with good diversity performance. Detailed antenna impedance matching performance comparisons were done to evaluate the benefit of using different decoupling technology. The envelop correlation coefficient is calculated to represent the diversity performance of the MIMO antenna.

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8

Iyampalam, Paulkani, and Indumathi Ganesan. "Complementary Sierpinski Knopp fractal antenna for emergency management system." International Journal of Microwave and Wireless Technologies 12, no. 10 (April 16, 2020): 1029–38. http://dx.doi.org/10.1017/s1759078720000343.

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AbstractIn this paper, the design and analysis of a complementary Sierpinski Knopp fractal antenna are presented. It is realized by applying the Sierpinski Knopp space-filling curve on the basic square monopole antenna. The performance metrics of the antenna such as S11 (reflection coefficient), voltage standing wave ratio, radiation pattern, gain and current distribution at resonant frequencies are analyzed by using ANSYS Electronic Desktop software package. FR4 dielectric material is used as a substrate in which the radiating element of an antenna is printed. Vector network analyzer and anechoic chamber are used for measuring the fabricated antenna in order to validate the simulated data. The proposed antenna resonates at three frequencies that are 2.08, 4.93, and 6.46 GHz with a reflection coefficient of −20.5, −23.1, and −24.3 dB, respectively. The suggested antenna covers the frequency bands for mobile satellite service, Public Protection and Disaster Relief communication devoted to the emergency management system and INSAT C band applications.

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9

Hu, Li Zhong, Guang Ming Wang, and Guo Cheng Wu. "Electromagnetic Coupling Reduction in Microstrip Antenna Arrays Using Single-Negative Electric Waveguided Metamaterials." Applied Mechanics and Materials 596 (July 2014): 816–21. http://dx.doi.org/10.4028/www.scientific.net/amm.596.816.

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A single-negative electric waveguided metamaterial (WG-MTM) is proposed using folded complementary split single ring resonator (FCSSRR) to reduce mutual coupling in antenna arrays for MIMO applications. The WG-MTM is investigated numerically, which proved to exhibit electric resonance and band-gap property. Two antenna arrays have been designed, fabricated and measured. By inserting the electric negative metamaterial, a mutual coupling reduction of 9.2dB has been achieved with an edge-to-edge distance less than 0.17 (where is the operating wavelength). Moreover, the metamaterial loaded antenna has better far-field radiation patterns compared with the reference antenna. Thus, this novel structure not only has good coupling reduction ability, but also can optimize the performances of the antennas.

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10

Rodriguez‐Ulibarri, Pablo, and Thomas Bertuch. "Microstrip‐fed complementary Yagi–Uda antenna." IET Microwaves, Antennas & Propagation 10, no. 9 (June 2016): 926–31. http://dx.doi.org/10.1049/iet-map.2015.0734.

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11

Das, Santanu, and S. K. Chowdhury. "On a self-complementary microstrip antenna." Microwave and Optical Technology Letters 13, no. 1 (September 1996): 22–24. http://dx.doi.org/10.1002/(sici)1098-2760(199609)13:1<22::aid-mop8>3.0.co;2-p.

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12

Patron, Damiano, Yuqiao Liu, and Kapil R. Dandekar. "A Miniaturized Reconfigurable CRLH Leaky-Wave Antenna Using Complementary Split-Ring Resonators." Journal of Electrical and Computer Engineering 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/6839028.

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Composite Right-/Left-Handed (CRLH) Leaky-Wave Antennas (LWAs) are a class of radiating elements characterized by an electronically steerable radiation pattern. The design is comprised of a cascade of CRLH unit cells populated with varactor diodes. By varying the voltage across the varactor diodes, the antenna can steer its directional beam from broadside to backward and forward end-fire directions. In this paper, we discuss the design and experimental analysis of a miniaturized CRLH Leaky-Wave Antenna for the 2.4 GHz WiFi band. The miniaturization is achieved by etching Complementary Split-Ring Resonator (CSRR) underneath each CRLH unit cell. As opposed to the conventional LWA designs, we take advantage of a LWA layout that does not require thin interdigital capacitors; thus we significantly reduce the PCB manufacturing constraints required to achieve size reduction. The experimental results were compared with a nonminiaturized prototype in order to evaluate the differences in impedance and radiation characteristics. The proposed antenna is a significant achievement because it will enable CRLH LWAs to be a viable technology not only for wireless access points, but also potentially for mobile devices.

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13

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.

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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.

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14

Ucar, Mustafa. "Complementary SRR-Based Reflector to Enhance Microstrip Antenna Performance." Applied Computational Electromagnetics Society 36, no. 6 (August 6, 2021): 779–87. http://dx.doi.org/10.47037/2020.aces.j.360620.

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In this paper, complementary split ring resonator (SRR) based reflector to enhance the printed slot dipole (PSD) antenna performance is introduced. The numerically calculated return-loss, directivity and radiation pattern results of the PSD antenna, with (w/) and without (w/o) CSRR element etched on reflector plane are presented and investigated. Numerical analysis and modelling of the proposed design are carried out using CST Microwave Studio simulator based on the finite integration technique. According to the simulation results, with the inclusion of the CSRR-based reflector into the PSD antenna, the directivity is increased by values changes from 0.6 dB to 4.25 dB through the operation band, while an improvement in bandwidth (~2.1%) is seen. It is also shown that this improvement in antenna performance is due to the -negative (ENG) behavior of CSRR structures. Prototype of the proposed antenna is fabricated using Arlon DiClad 880 substrate with electrical permittivity ofεr= 2.2. A quite good agreement between simulation and measurement is obtained. In this study, it is shown that the radiation performance of the antenna can be increased easily by using the CSRR element as a reflector in the antenna structure with a new enhancement approach. Also, the proposed antenna with a compact size of 0.27λ× 0.41λ is appropriate for operating in IEEE 802.11b/g/n/ax (2.4 GHz) WLAN applications.

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15

Ortiz, Noelia, Francisco Falcone, and Mario Sorolla. "Gain Improvement of Dual Band Antenna Based on Complementary Rectangular Split-Ring Resonator." ISRN Communications and Networking 2012 (March 20, 2012): 1–9. http://dx.doi.org/10.5402/2012/951290.

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A simple and successful dual band patch linear polarized rectangular antenna design is presented. The dual band antenna is designed etching a complementary rectangular split-ring resonator in the patch of a conventional rectangular patch antenna. Furthermore, a parametric study shows the influence of the location of the CSRR particle on the radiation characteristics of the dual band antenna. Going further, a miniaturization of the conventional rectangular patch antenna and an enhancement of the complementary split-ring resonator resonance gain versus the location of the CSRR on the patch are achieved. The dual band antenna design has been made feasible due to the quasistatic resonance property of the complementary split-ring resonators. The simulated results are compared with measured data and good agreement is reported.

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16

Mohd Yunus, Noor, Jumril Yunas, Alipah Pawi, Zeti Rhazali, and Jahariah Sampe. "Investigation of Micromachined Antenna Substrates Operating at 5 GHz for RF Energy Harvesting Applications." Micromachines 10, no. 2 (February 22, 2019): 146. http://dx.doi.org/10.3390/mi10020146.

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This paper investigates micromachined antenna performance operating at 5 GHz for radio frequency (RF) energy harvesting applications by comparing different substrate materials and fabrication modes. The research aims to discover appropriate antenna designs that can be integrated with the rectifier circuit and fabricated in a CMOS (Complementary Metal-Oxide Semiconductor)-compatible process approach. Therefore, the investigation involves the comparison of three different micromachined antenna substrate materials, including micromachined Si surface, micromachined Si bulk with air gaps, and micromachined glass-surface antenna, as well as conventional RT/Duroid-5880 (Rogers Corp., Chandler, AZ, USA)-based antenna as the reference. The characteristics of the antennas have been analysed using CST-MWS (CST MICROWAVE STUDIO®—High Frequency EM Simulation Tool). The results show that the Si-surface micromachined antenna does not meet the parameter requirement for RF antenna specification. However, by creating an air gap on the Si substrate using a micro-electromechanical system (MEMS) process, the antenna performance could be improved. On the other hand, the glass-based antenna presents a good S11 parameter, wide bandwidth, VSWR (Voltage Standing Wave Ratio) ≤ 2, omnidirectional radiation pattern and acceptable maximum gain of >5 dB. The measurement results on the fabricated glass-based antenna show good agreement with the simulation results. The study on the alternative antenna substrates and structures is especially useful for the development of integrated patch antennas for RF energy harvesting systems.

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17

Shaalan, Amer Basim. "Fractal Minkowski Antenna Loaded with Hilbert Curve as Complementary Split Ring Resonator." International Letters of Chemistry, Physics and Astronomy 51 (May 2015): 78–86. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.51.78.

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Fractal Minkowski patch antenna is proposed. Classical complementary split ring resonator (CSRR) is slotted on the patch. For comparison, fractal Hilbert shape split ring resonator also slotted on the patch. These slots make the patch behaves as a left-handed material in certain frequency band. Minkowski fractal antenna has three resonance frequencies. The complementary split ring resonator and Hilbert ring affects the upper two frequencies and make the antenna resonate at lower frequencies. Lowering the resonance frequencies cause a reduction in antenna size. More reduction of antenna size is obtained when fractal Hilbert is used as complementary split ring resonator. The simulated results have been done by using (HFSS) software, which is based on finite element modeling. The measurement of fabricated antenna shows good agreement with simulation results

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18

Tao, Lei, Jianchun Xu, Haihong Li, Yanan Hao, Shanguo Huang, Ming Lei, and Ke Bi. "Bandwidth Enhancement of Microstrip Patch Antenna Using Complementary Rhombus Resonator." Wireless Communications and Mobile Computing 2018 (August 12, 2018): 1–8. http://dx.doi.org/10.1155/2018/6352181.

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By using complementary rhombus resonator (CRR), a small-size and low-profile microstrip patch antenna (MPA) with broad bandwidth has been proposed. Parametric studies were conducted to illustrate the working principle of the proposed antenna. An additional resonance is introduced by the CRR to broaden the bandwidth. Compared with the MPA without the CRR, the bandwidth of the proposed antenna is increased by 200%. The measured results are in good agreements with the simulated ones, which demonstrate that this design provides a way to obtain the broadband antenna.

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19

Ahmed, Sadiq, and Madhukar Chandra. "Design of a dual linear polarization antenna using split ring resonators at X-band." Advances in Radio Science 15 (November 6, 2017): 259–67. http://dx.doi.org/10.5194/ars-15-259-2017.

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Abstract. Dual linear polarization microstrip antenna configurations are very suitable for high-performance satellites, wireless communication and radar applications. This paper presents a new method to improve the co-cross polarization discrimination (XPD) for dual linear polarized microstrip antennas at 10 GHz. For this, three various configurations of a dual linear polarization antenna utilizing metamaterial unit cells are shown. In the first layout, the microstrip patch antenna is loaded with two pairs of spiral ring resonators, in the second model, a split ring resonator is placed between two microstrip feed lines, and in the third design, a complementary split ring resonators are etched in the ground plane. This work has two primary goals: the first is related to the addition of metamaterial unit cells to the antenna structure which permits compensation for an asymmetric current distribution flow on the microstrip antenna and thus yields a symmetrical current distribution on it. This compensation leads to an important enhancement in the XPD in comparison to a conventional dual linear polarized microstrip patch antenna. The simulation reveals an improvement of 7.9, 8.8, and 4 dB in the E and H planes for the three designs, respectively, in the XPD as compared to the conventional dual linear polarized patch antenna. The second objective of this paper is to present the characteristics and performances of the designs of the spiral ring resonator (S-RR), split ring resonator (SRR), and complementary split ring resonator (CSRR) metamaterial unit cells. The simulations are evaluated using the commercial full-wave simulator, Ansoft High-Frequency Structure Simulator (HFSS).

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20

Kumar, Amit, Abdul Quaiyum Ansari, Binod Kumar Kanaujia, and Jugul Kishor. "High Isolation Compact Four-Port MIMO Antenna Loaded with CSRR for Multiband Applications." Frequenz 72, no. 9-10 (August 28, 2018): 415–27. http://dx.doi.org/10.1515/freq-2017-0276.

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Abstract In this paper, a compact 4×4 multiple-input-multiple-output (MIMO) patch antenna has been presented for triple band operation. Out of the 4 antennas, two are tuned to cover DCS (Digital Cellular System) downlink and two are tuned to cover DCS uplink frequency separately along with two common operating frequency centered around 2.45 GHz and 875 MHz. Four complementary split-ring resonators (CSRRs) have been etched in the ground plane exactly below the four patch antennas for attaining compactness from 0.36λ02 to 0.13λ02. In addition to this, by optimizing CSRRs outer radius, one lower common band operation of around 875 MHz (0.031λ02) has been obtained. Two, square split-ring resonators (SRRs) are placed between patch antennas to increase isolation by almost 7 dB around DCS band. The proposed MIMO antenna has been fabricated on an FR4 substrate (60×60×0.8) mm3 with dielectric constant, εr=4.3 having an antenna area of 0.13λ02. The Proposed MIMO antenna has two common operating bands, 850–900 MHz, 2410–2466 MHz and one individual band from 1725–1770 MHz for one group of two antennas of dimensions 17×22 mm2 and another individual band from 1800–1845 MHz for another group of two antennas of dimensions 17×23 mm2, where reflection coefficient is less than −10 dB with a minimum isolation of 17 dB. Diversity performance of the proposed MIMO antenna has been verified experimentally on all three bands. However, there is a slight deviation in the DCS operating band due to two different groups of antennas.

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21

Xu, Jianchun, Lei Tao, Ru Zhang, Yanan Hao, Shanguo Huang, and Ke Bi. "Broadband complementary ring-resonator based terahertz antenna." Optics Express 25, no. 15 (July 10, 2017): 17099. http://dx.doi.org/10.1364/oe.25.017099.

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22

Takemura, N. "Inverted-FL Antenna With Self-Complementary Structure." IEEE Transactions on Antennas and Propagation 57, no. 10 (October 2009): 3029–34. http://dx.doi.org/10.1109/tap.2009.2028640.

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23

Cheng, Yong, Ya-Dan Li, Wen-Jun Lu, and Lei Zhu. "A wideband dual-mode complementary dipole antenna." Electromagnetics 38, no. 2 (February 16, 2018): 134–43. http://dx.doi.org/10.1080/02726343.2018.1437109.

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24

Liang, Weilong, Yong-Chang Jiao, Yuchen Luan, and Chao Tian. "A Dual-Band Circularly Polarized Complementary Antenna." IEEE Antennas and Wireless Propagation Letters 14 (2015): 1153–56. http://dx.doi.org/10.1109/lawp.2015.2392787.

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25

Paredes, F., G. Zamora, S. Zufanelli, F. J. Herraiz-Martínez, J. Bonache, and F. Martín. "Recent Advances in Multiband Printed Antennas Based on Metamaterial Loading." Advances in OptoElectronics 2012 (October 22, 2012): 1–12. http://dx.doi.org/10.1155/2012/968780.

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It is shown that printed antennas loaded with metamaterial resonators can be designed to exhibit multiband functionality. Two different antenna types and metamaterial loading are considered: (i) printed dipoles or monopoles loaded with open complementary split ring resonators (OCSRRs) and (ii) meander line or folded dipole antennas loaded with split ring resonators (SRRs) or spiral resonators (SRs). In the first case, multiband operation is achieved by series connecting one or more OCSRRs within the dipole/monopole. Such resonators force opens at their positions, and by locating them at a quarter wavelength (at the required operating frequencies) from the feeding point, it is possible to achieve multiple radiation bands. In the second case, dual-band functionality is achieved through the perturbation of the antenna characteristics caused by the presence of the metamaterial resonators. This latter strategy is specially suited to achieve conjugate matching between the antenna and the chip in radiofrequency identification (RFID) tags at two of the regulated UHF-RFID bands.

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26

Cheng, Chunxia, and Liyan Luo. "Mutual Coupling Reduction Using Improved Dual-Layer Mushroom and E-Shaped Stub." International Journal of Antennas and Propagation 2021 (February 18, 2021): 1–9. http://dx.doi.org/10.1155/2021/8862570.

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The improved dual-layer mushroom (IDLM) and back-to-back E-shaped stubs for mutual coupling reduction between microstrip patch antennas are presented in this paper. The IDLM unit consists of one upper layer complementary split-ring resonator lattice and four lower layer lattices, whose centers are connected to the ground by a pin. The decoupling structure can prevent the surface current from one antenna port to another, so as to improve the isolation between the antennas. The proposed antenna works in the open wireless communication band of 2.45 GHz. Using the proposed decoupling structure, a low mutual coupling level ranging from −27 to −40 dB is obtained when the center distance of the adjacent patches is 0.5λ0. The total size of the decoupling antenna is 99 × 41 × 2.4 mm3 with a frequency range of 2.42–2.48 GHz for S11 < −10 dB. The proposed decoupling structure can also improve the average gain and efficiency of the antenna by 0.1 dB and 5%, respectively. The antenna is studied from the aspects of isolation, return loss, current and electric field distribution, radiation pattern, and diversity performance. The designed decoupling antenna is fabricated and measured. The pattern, isolation, and return loss of the tested results show good consistence with the simulation results. The diversity gain and envelop correlation coefficient of the diversity performance show that the designed antenna can be used in MIMO or Rx/Tx systems.

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27

So, Kwok, Kwai Luk, Chi Chan, and Ka Chan. "3D Printed High Gain Complementary Dipole/Slot Antenna Array." Applied Sciences 8, no. 8 (August 20, 2018): 1410. http://dx.doi.org/10.3390/app8081410.

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By employing the complementary dipole antenna concept to the normal waveguide fed slot radiator, an improved antenna element with wide impedance bandwidth and symmetrical radiation patterns is developed. This is achieved by mounting two additional metallic cuboids on the top of the slot radiator, which is equivalent to adding an electric dipole on top of the magnetic dipole due to the slot radiator. Then, a high-gain antenna array was designed based on the improved element and fabricated, using 3D printing technology, with stable frequency characteristics operated at around 28 GHz. This was followed by metallization via electroplating. Analytical results agree well with the experimental results. The measured operating frequency range for the reflection coefficient ≤−15 dB is from 25.7 GHz to 29.8 GHz; its corresponding fractional impedance bandwidth is 14.8%. The measured gain is approximately 32 dBi, with the 3 dB beamwidth around 4°.

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28

Wu, Fan, and Kwai Man Luk. "A Compact and Reconfigurable Circularly Polarized Complementary Antenna." IEEE Antennas and Wireless Propagation Letters 16 (2017): 1188–91. http://dx.doi.org/10.1109/lawp.2016.2627012.

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29

Sayidmarie, Khalil Hassan, and Y. A. Fadhel. "SELF-COMPLEMENTARY CIRCULAR DISK ANTENNA FOR UWB APPLICATIONS." Progress In Electromagnetics Research C 24 (2011): 111–22. http://dx.doi.org/10.2528/pierc11072502.

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30

Rajendran, Jolly, and Sreedevi K. Menon. "A multiband self-complementary SRR loaded dipole antenna." Microwave and Optical Technology Letters 60, no. 8 (June 15, 2018): 1842–47. http://dx.doi.org/10.1002/mop.31258.

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31

Lin, Chun-Cheng, Chih-Yu Huang, Guan-Han Chen, and Chung-Hsiu Chiu. "Rectangular quasi-self-complementary antenna for wlan applications." Microwave and Optical Technology Letters 56, no. 9 (June 24, 2014): 2179–82. http://dx.doi.org/10.1002/mop.28532.

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32

Huang, Chih-Yu, and Guan-Han Chen. "Compact self-complementary antenna for ultra-wideband applications." Microwave and Optical Technology Letters 54, no. 9 (June 18, 2012): 2144–46. http://dx.doi.org/10.1002/mop.27005.

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33

Sameena, N. M., R. B. Konda, and S. N. Mulgi. "Broadband, high-gain complementary-symmetry microstrip array antenna." Microwave and Optical Technology Letters 52, no. 10 (July 14, 2010): 2256–58. http://dx.doi.org/10.1002/mop.25477.

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34

Hu, Peng Fei, Yong Mei Pan, and Bin-Jie Hu. "Electrically Small, Planar, Complementary Antenna With Reconfigurable Frequency." IEEE Transactions on Antennas and Propagation 67, no. 8 (August 2019): 5176–84. http://dx.doi.org/10.1109/tap.2019.2911639.

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35

Bala, Bashir D., Mohamad Kamal A. Rahim, and Noor Asniza Murad. "Complementary electric-LC resonator antenna for WLAN applications." Applied Physics A 117, no. 2 (August 23, 2014): 635–39. http://dx.doi.org/10.1007/s00339-014-8714-7.

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36

Kumar, Pawan, Shabana Urooj, and Fadwa Alrowais. "Design of Quad-Port MIMO/Diversity Antenna with Triple-Band Elimination Characteristics for Super-Wideband Applications." Sensors 20, no. 3 (January 22, 2020): 624. http://dx.doi.org/10.3390/s20030624.

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A compact, low-profile, coplanar waveguide (CPW)-fed quad-port multiple-input–multiple-output (MIMO)/diversity antenna with triple band-notched (Wi-MAX, WLAN, and X-band) characteristics is proposed for super-wideband (SWB) applications. The proposed design contains four similar truncated–semi-elliptical–self-complementary (TSESC) radiating patches, which are excited through tapered CPW feed lines. A complementary slot matching the radiating patch is introduced in the ground plane of the truncated semi-elliptical antenna element to obtain SWB. The designed MIMO/diversity antenna displays a bandwidth ratio of 31:1 and impedance bandwidth (|S11| ≤ − 10 dB) of 1.3–40 GHz. In addition, a complementary split-ring resonator (CSRR) is implanted in the resonating patch to eliminate WLAN (5.5 GHz) and X-band (8.5 GHz) signals from SWB. Further, an L-shaped slit is used to remove Wi-MAX (3.5 GHz) band interferences. The MIMO antenna prototype is fabricated, and a good agreement is achieved between the simulated and experimental outcomes.

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37

Nelaturi, S., and N. V. S. N. Sarma. "CSRR based patch antenna for Wi-Fi and WiMAX Applications." Advanced Electromagnetics 7, no. 3 (August 14, 2018): 40–45. http://dx.doi.org/10.7716/aem.v7i3.700.

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In this paper, a novel compact microstrip patch antenna is proposed for Wi- Fi and WiMAX bands. To achieve miniaturization the dimensions of the square radiating patch are chosen with reference to the high frequency band (3.3 GHz). The dual band is achieved by loading a Complementary Split Ring Resonator (CSRR) into the radiating patch. The left handed nature of the CSRR is the cause for low frequency band (2.4 GHz). To improve the return loss bandwidth and axial ratio bandwidth at upper band the fractal concept is introduced along the edges of the square patch. Thus a low volume dual band antenna is simulated using HFSS. A comparison with measured data is also presented. The fabricated antenna is found to be occupying 25% less volume (with reference to 2.4 GHz) than existing antennas which is mainly due to the blending of the two recent concepts ‘metamaterials and fractals’.

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38

Shao, Rong Lin, Bo Li, Liu Yang, and Yong Jin Zhou. "Electrically small multiband antenna based on spoof localized surface plasmons." EPJ Applied Metamaterials 6 (2019): 11. http://dx.doi.org/10.1051/epjam/2019009.

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Here an electrically small multiband antenna based on spoof localized surface plasmons (LSPs) has been proposed using corrugated ring resonator printed on a thin dielectric substrate with complementary metallic spiral structure (MSS) on the ground plane. It has been found that the resonant frequencies of spoof LSPs redshift by tuning the arm length of the complementary MSS, which leads to the miniaturization of the antenna. The fabricated multiband antenna has a small size of only 0.11λ × 0.1λ, covering GSM900, GSM1800, and WiFi bands. Such electrically small multiband antenna with high gain is necessary for efficient wireless energy harvesting (WEH), which can find more applications in various areas including Internet of Things (IoT), wireless sensor network (WSN), etc.

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39

Mushiake, Y. "A report on Japanese development of antennas: from the Yagi-Uda antenna to self-complementary antennas." IEEE Antennas and Propagation Magazine 46, no. 4 (August 2004): 47–60. http://dx.doi.org/10.1109/map.2004.1373999.

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Woo, Dong-Sik, Young-Gon Kim, Young-Ki Cho, and Kang-Wook Kim. "Self-Complementary Spiral Antenna Design Using a Ultra-Wideband Microstrip-to-CPS Balun." Journal of Korean Institute of Electromagnetic Engineering and Science 20, no. 2 (February 28, 2009): 208–14. http://dx.doi.org/10.5515/kjkiees.2009.20.2.208.

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41

Islam, Sikder Sunbeam, Touhidul Alam, Mohammad Rashed Iqbal Faruque, and Mohammad Tariqul Islam. "Design and analysis of a complementary split ring resonator (CSRR) metamaterial based antenna for wideband application." Science and Engineering of Composite Materials 24, no. 4 (July 26, 2017): 573–80. http://dx.doi.org/10.1515/secm-2015-0274.

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AbstractIn this article, a compact complementary split ring resonator (CSRR) based double-negative (DNG) metamaterial antenna is presented for wideband (4.49 GHz–21.85 GHz) wireless application. The antenna is incorporated with a DNG metamaterial patch: 50Ω microstrip feed line and partial ground plane. The antenna shows measured fractional bandwidth of 131.81% with a compact size of 0.37λ×0.37λ×0.01λ. The commercially available finite integration technique (FIT)-based simulation software, computer simulation technology (CST) microwave studio was adopted to investigate the performance of the proposed antenna. Several parametric studies were performed to investigate the effect of key structural parameters on antenna performances. The double-negative characteristics of the metamaterial were investigated as well.

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42

Sun, Libin, Yue Li, and Zhijun Zhang. "Wideband Integrated Quad-Element MIMO Antennas Based on Complementary Antenna Pairs for 5G Smartphones." IEEE Transactions on Antennas and Propagation 69, no. 8 (August 2021): 4466–74. http://dx.doi.org/10.1109/tap.2021.3060020.

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43

Quero, Carmen, Berta Vidal, and Angel Guerrero. "EAG Responses Increase of Spodoptera littoralis Antennae after a Single Pheromone Pulse." Natural Product Communications 9, no. 8 (August 2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900810.

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Increased behavioral sensitivity to the pheromone after brief exposure of the whole insect to the sex pheromone has been documented in antennal lobe neurons of Spodoptera littoralis. We investigated whether a brief stimulus of the major component of the pheromone on naïve antenna separated from the head increased the electroantennographic responses after successive stimulations at different times. The response increase was clear 30 min after the first stimulation, and this effect lasted at least 60 min, the average life time of the antenna. Our results suggest that the olfactory receptor neurons, and not only the neurons in the antennal lobe, may be involved in the increased antennal response after a single pheromone pulse.

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44

Pal, Debasish, Rahul Singhal, Abhishek Joshi, and Ayan Kumar Bandyopadhyay. "Multiband planar antenna with CSRR loaded ground plane for WLAN and fixed satellite service applications." Frequenz 74, no. 11-12 (November 26, 2020): 393–99. http://dx.doi.org/10.1515/freq-2020-0012.

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AbstractIn this paper, a novel approach to achieve multiband antenna operation using metamaterial based resonant structures is presented. Multiband antenna operation is achieved by employment of complementary split ring resonators (CSRR) printed in the ground plane. The CSRRs resonate at different frequencies according to their optimized dimensions. Proposed approach features simple design and fabrication possibility compared to other methods of achieving multiband antenna operation such as usage of composite right/left-handed (CRLH) transmission line or split ring resonators (SRR) or CSRR around the patch surface. The proposed method is demonstrated through simulation and experimental measurements using three CSRRs with different resonant frequencies together with a tuning CSRR and a radiating patch. Contribution of different CSRRs to obtain multiple resonances have been shown by surface current plots. Measured antenna gain of 2.78, 1.27 and 3.45 dB has been obtained at frequencies of 5.25, 6.28 and 7.29 GHz respectively. The measurements done on developed antenna exhibits close agreement with the simulation results. In context with the current communication application trends involving multiple operating bands like 5G, this approach may have immense application potential since the same can be adopted to achieve compact multiband antennae operation in other frequency bands of interest.

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45

Islam, M. M., M. R. I. Faruque, and M. T. Islam. "A Compact 5.5 GHz Band-Rejected UWB Antenna Using Complementary Split Ring Resonators." Scientific World Journal 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/528489.

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A band-removal property employing microwave frequencies using complementary split ring resonators (CSRRs) is applied to design a compact UWB antenna wishing for the rejection of some frequency band, which is meanwhile exercised by the existing wireless applications. The reported antenna comprises optimization of a circular radiating patch, in which slotted complementary SRRs are implanted. It is printed on low dielectric FR4 substrate material fed by a partial ground plane and a microstrip line. Validated results exhibit that the reported antenna shows a wide bandwidth covering from 3.45 to more than 12 GHz, with a compact dimension of 22 × 26 mm2, and VSWR < 2, observing band elimination of 5.5 GHz WLAN band.

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46

Sanyal, Rajarshi, Partha Pratim Sarkar, and Santosh Kumar Chowdhury. "Quasi-self-complementary ultra-wideband antenna with band rejection characteristics." International Journal of Microwave and Wireless Technologies 10, no. 3 (April 2018): 336–44. http://dx.doi.org/10.1017/s1759078717001106.

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This article presents a compact novel quasi-self-complementary semi-octagonal-shaped antenna for ultra-wideband (UWB) application. The proposed novel structure is fed by a microstrip line where different rectangular truncation is etched to the ground plane as an impedance matching element, which results for much wider impedance bandwidth (VSWR<2) from 2.9 to 20 GHz. In order to obtain band-notched characteristics at 5.5 GHz, an open-ended, quarter wavelength, spiral-shaped stub is introduced in the vicinity of the truncated part of the ground plane. An equivalent circuit model is adopted to investigate the band rejection characteristics of the ground plane stub. Sharpness of the rejection band can be controlled by maintaining the gap between stub resonator and the slotted periphery of ground plane. The proposed antenna design is validated by experimental measurements.

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47

Biswas, Baidyanath, Rowdra Ghatak, Rabindra K. Mishra, and Dipak R. Poddar. "Characterization of a Self-complementary Sierpinski Gasket Microstrip Antenna." PIERS Online 2, no. 6 (2006): 698–701. http://dx.doi.org/10.2529/piers060901153618.

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48

Lee, Ho Sang, and Tae Hoon Yoo. "A Ultra-Wideband Two-Arm Self-Complementary Sinuous Antenna." Journal of Korean Institute of Electromagnetic Engineering and Science 26, no. 3 (March 31, 2015): 257–67. http://dx.doi.org/10.5515/kjkiees.2015.26.3.257.

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49

Sultan, K. S., O. M. A. Dardeer, and H. A. Mohamed. "Design of Compact Dual Notched Self-Complementary UWB Antenna." Open Journal of Antennas and Propagation 05, no. 03 (2017): 99–109. http://dx.doi.org/10.4236/ojapr.2017.53008.

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50

Dewandaru, Bambang, Fitri Yuli Zulkifli, and Eko Tjipto Rahardjo. "Complementary Interleaved CDS Arrays to Improve Antenna Aperture Utilization." International Journal on Communications Antenna and Propagation (IRECAP) 9, no. 2 (April 30, 2019): 81. http://dx.doi.org/10.15866/irecap.v9i2.16317.

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