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Статті в журналах з теми "Devices in microstrip"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 9 лютого 2022

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1

Firdausi, Ahmad, Lusi Damayanti, Galang Persada Nur Hakim, Umaisaroh Umaisaroh, and Mudrik Alaydrus. "Design of A Dual-Band Microstrip Antenna for 5G Communication." Journal of Integrated and Advanced Engineering (JIAE) 1, no. 1 (June 30, 2021): 65–72. http://dx.doi.org/10.51662/jiae.v1i1.15.

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Анотація:

The necessity for mobile communication devices is increased rapidly. Users expect to get very fast information access and data access without delay. The fifth-generation (5G) development in wireless mobile telecommunication technology promises capacity enhancement, ease connectivity, high efficiency, and high data rate transmission. The appropriate device should support this improvement of the technology. The antenna is one of the main devices to support the high data rate transmission. This paper proposed designing a dual-band rectangular patch antenna in 29 GHz and 38 GHz that supports 5G technology. This microstrip antenna is composed of 4 patch array elements to obtain higher gain. The material used for this microstrip antenna is RT Duroid 5880 with a dielectric constant of 2.2 and a thickness of 1.575 mm. Both measurement and simulation are confirmed that the 2×2 array microstrip antenna in 29 GHz and 38 GHz frequency have a return loss value of -12.5 dB and -16 dB, respectively. The bandwidth for both frequencies has a value of 4.5 GHz and 3.75 GHz.

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2

de Menezes, Fernando Lima, Davino Machado Andrade Neto, Maria do Livramento Linhares Rodrigues, Helder Levi Silva Lima, Denis Valony Martins Paiva, Marcelo Antônio Santos da Silva, Lillian Maria Uchôa Dutra Fechine, et al. "From Magneto-Dielectric Biocomposite Films to Microstrip Antenna Devices." Journal of Composites Science 4, no. 4 (September 24, 2020): 144. http://dx.doi.org/10.3390/jcs4040144.

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Magneto-dielectric composites are interesting advanced materials principally due to their potential applications in electronic fields, such as in microstrip antennas substrates. In this work, we developed superparamagnetic polymer-based films using the biopolymeric matrices chitosan (Ch), cellulose (BC) and collagen (Col). For this proposal, we synthesized superparamagnetic iron oxide nanoparticles (SPIONs) functionalized with polyethyleneimine with a cheap method using sonochemistry. Further, the SPIONs were dispersed into polymer matrices and the composites were evaluated regarding morphology, thermal, dielectric and magnetic properties and their application as microstrip antennas substrates. Microscopically, all tested films presented a uniform dispersion profile, principally due to polyethyleneimine coating. Under an operating frequency (fo) of 4.45 GHz, Ch, BC and Col-based SPION substrates showed moderate dielectric constant (ε′) values in the range of 5.2–8.3, 6.7–8.4 and 5.9–9.1, respectively. Furthermore, the prepared films showed no hysteresis loop, thereby providing evidence of superparamagnetism. The microstrip antennas showed considerable bandwidths (3.37–6.34%) and a return loss lower than −10 dB. Besides, the fo were modulated according to the addition of SPIONs, varying in the range of 4.69–5.55, 4.63–5.18 and 4.93–5.44 GHz, for Ch, BC and Col-based substrates, respectively. Moreover, considering best modulation of ε′ and fo, the Ch-based SPION film showed the most suitable profile as a microstrip antenna substrate.

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3

Lee, Gye-An, Hai-Young Lee, and F. De Flaviis. "Perforated microstrip structure for miniaturising microwave devices." Electronics Letters 38, no. 15 (2002): 800. http://dx.doi.org/10.1049/el:20020535.

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4

Sun, Xia Li, Qing Zhang, and Shu Yan. "Design of an Active Phase Conjugation Circuit for Retrodirective Array in UHF Band." Applied Mechanics and Materials 43 (December 2010): 201–6. http://dx.doi.org/10.4028/www.scientific.net/amm.43.201.

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Анотація:

An active phase conjugation circuit of retrodirective array which can be used in UHF band (890-960MHz) has been designed. Circuit of the retrodirective array consists of filters, mixers, dividers and other microwave devices. In this paper, microstrip filters and mixers are primarily designed. Divided matching circuit will be designed appropriate on the basis of the antenna element. Filters consist of microstrip coupled lines to conform with microstrip antenna arrays; to suppress the effect of RF input signals to output transmitted signals, selecting the image-rejection mixers. Simulation results of ADS show that all of the designed active devices display good performances.

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5

Tatarenko, Alexander, Darya Snisarenko, and Mirza Bichurin. "Modeling of magnetoelectric microwave devices." Facta universitatis - series: Electronics and Energetics 30, no. 3 (2017): 285–93. http://dx.doi.org/10.2298/fuee1703285t.

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The possibility of computer modeling implementation of electrically controlled magnetoelectric (ME) microwave devices is considered. The computer modeling results of different structures of ME microwave devices based on layered ferrite-piezoelectric structure formed on the slot line, microstrip line and coplanar waveguide are offered. Results are reported as frequency dependencies of insertion losses of ME devices.

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6

Goran, Petrus Kerowe, and Eka Setia Nugraha. "Asymmetric-Slit Method on WiFi Antenna with 2.4 GHz and 5 GHz Frequency." IJITEE (International Journal of Information Technology and Electrical Engineering) 4, no. 2 (September 16, 2020): 53. http://dx.doi.org/10.22146/ijitee.55811.

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Анотація:

Wireless Fidelity (WiFi) devices are often used to access the internet network, both for working and in information searching. Accessing the internet can be administered anywhere provided that the area is within the WiFi devices range. A WiFi device uses 2.4 GHz and 5 GHz operating frequencies. There were several methods employed in the previous studies so that an antenna design could work in two different frequencies, i.e., winding bowtie method, Sierpinski method, and double-circular method. This paper employed a simple method, the slit method. The objective of this paper is to discover a simple antenna model that works on 2.4 GHz and 5 GHz frequencies. This paper employed a square patch microstrip antenna with a slit method. The dimensions of the designed square patch microstrip antenna were 42.03 mm × 27.13 mm × 0.035 mm. The antenna worked at 2.4 GHz and 5 GHz frequencies. The obtained simulation results after the optimization showed that the square patch microstrip antenna using the slit method acquired a value of S11 (return loss) of -10.15 dB at a frequency of 2.4 GHz and -37.315 dB at a frequency of 5 GHz.

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7

Mozharovskiy, Andrei V., Aleksey A. Artemenko, Roman O. Maslennikov, and Irina B. Vendik. "Design of Wideband Waveguide-to-Microstrip Transition for 60 GHz Frequency Band." Journal of the Russian Universities. Radioelectronics 22, no. 4 (October 1, 2019): 31–44. http://dx.doi.org/10.32603/1993-8985-2019-22-4-31-44.

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Анотація:

Introduction. The frequency band around 60 GHz is one of the most promising to realize new generation communication systems with high data rate due to the utilization of a wide operational frequency band that significantly exceeds traditional frequency bands below 6 GHz. High interest in the development of 60 GHz communication systems is related to the recent evolution of MMIC technology that allows creating effective components for this band and the variety of planar devices. Both are typically realized on printed circuit boards and have interfaces that are based on microstrip lines. The wideband waveguide-to-microstrip transition is required to test various active and passive planar devices with microstrip interfaces in order to provide an effective interconnection between the standard waveguide interface of measurement equipment and planar microstrip structures.Objective. The paper deals with the design of planar wideband waveguide-to-microstrip transition with low insertion loss level in the 60 GHz frequency band.Materials and methods. The main objective is achieved by analyzing of discontinuities in waveguide-tomicrostrip transition structure and their influence on transition characteristics. The transition characteristics are analyzed using full-wave electromagnetic simulation and confirmed with experimental investigation of designed wideband waveguide-to-microstrip transition samples.Results. The designed transition is based on an electromagnetic coupling through a slot aperture in a microstrip line ground plane. The transition is performed without using blind vias in its structure that provides low production cost and al-lows integrating the WR-15 rectangular waveguide in a simple manner without any modifications in the waveguide structure. Results of the electromagnetic simulation are confirmed with experimental investigations of the fabricated waveguide-to-microstrip transition samples. The designed transition provides operation in the nominal bandwidth of the WR-15 waveguide, namely, 50…75 GHz with the insertion loss level of 2 dB and with less than 0.8 dB insertion loss level at the 60 GHz frequency.Conclusion. The designed waveguide-to-microstrip transition can be considered as an effective solution for interconnection between various waveguide and microstrip millimeter-wave devices due to its wideband performance, low insertion loss level, simple integration and robustness to the manufacturing tolerances structure.

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8

Drozdovski, N. V., and L. M. Drozdovskaia. "Microwave control devices based on microstrip hairpin resonators." International Journal of Electronics 89, no. 7 (July 2002): 575–82. http://dx.doi.org/10.1080/00207210210163690.

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9

Ortega Paredes, Abraham E., Leonardo R. A. X. de Menezes, Humberto Abdalla, and Ivan N. A. Romani. "Modeling and Characterization for Microstrip Filters in the Manufacturing Process through the Unscented Transform and Use of Electromagnetic Simulators." Modelling and Simulation in Engineering 2010 (2010): 1–5. http://dx.doi.org/10.1155/2010/691241.

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Анотація:

This paper presents the unscented transform (UT) applied to uncertainty modeling of manufacturing tolerances at the design stage of microwave passive devices. The process combines the UT with electromagnetic simulations and assumes that the numerical sources of error are negligible in comparison to the imperfections due to the manufacturing process. The technique was validated with the simulation, construction, and test of several sets of identical microstrip filters with very good results. Although the combination of UT and electromagnetic simulators was presented for microstrip filters, it can also be used for different types of microwave devices.

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10

Belyaev, B. A., S. A. Khodenkov, R. G. Galeev, and V. F. Shabanov. "A lowpass filter based on a 2d microstrip electromagnetic crystal." Доклады Академии наук 485, no. 1 (May 22, 2019): 27–32. http://dx.doi.org/10.31857/s0869-5652485127-32.

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Анотація:

A new construction of a lowpass filter was developed based on a two-dimensional microstrip electromagnetic crystal, which had a steeper slope of the frequency response as compared to a filter consisting of a one-dimensional microstrip electromagnetic crystal. The investigated lowpass filter construction is characterized by a high workability and ease of manufacturing. Electrodynamic numerical simulation of the 3D model of the considered microstrip structure agrees well with the experiment, which allows conducting parametric synthesis of devices with the required properties using a personal computer.

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11

Xu, He-Xiu, Guang-Ming Wang, and Chen-Xin Zhang. "Fractal-Shaped Metamaterials and Applications to Enhanced-Performance Devices Exhibiting High Selectivity." International Journal of Antennas and Propagation 2012 (2012): 1–14. http://dx.doi.org/10.1155/2012/515167.

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Анотація:

Novel single negative metamaterial (MTM) transmission lines (TLs) are presented and studied in microstrip technology. They consist of a host TL in the conductor strip and a fractal-shaped complementary ring resonator (CRR) etched in the ground plane. Two types of fractal-shaped CRR are involved including the Moore and Hilbert. It is found that fractal perturbation in CRR results in lower and more transmission zeros in comparison with conventional CRR using nonfractal geometries. The single negative-permeability or -permittivity of these MTM TLs which associated with the resultant multitransmission zeros occurs by turns and should benefit devices with high selectivity requirement. Potential application of these MTM cells are illustrated by two examples, one is the microstrip stepped-impedance transformers (SIT) operating at 3.5 GHz with two edged attenuation poles to introduce selectivity; the other one is the Hi-Lo microstrip low-pass filter (LPF) with cutoff frequency 2.5 GHz exhibiting improved selectivity (77.3 dB/GHz). By constructing the low-impedance sections as hybrid prefractal shape and crown square, both the SITs and LPF obtained additional bandwidth enhancement and good matching. Consistent results between simulation and measurement have confirmed the design concept.

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12

Nose, Toshiaki, Ryota Ito, and Michinori Honma. "Potential of Liquid-Crystal Materials for Millimeter-Wave Application." Applied Sciences 8, no. 12 (December 8, 2018): 2544. http://dx.doi.org/10.3390/app8122544.

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In this study, we reviewed three topics regarding the application of liquid-crystal (LC) materials to millimeter-wave (MMW) devices. It is essential to develop useful measurement methods for refractive indices of LC materials in the MMW region. Herein, a novel measurement method using optical short is demonstrated using a Si semiconductor substrate. There are two approaches to develop MMW LC devices. One is the quasi-optical approach, which involves scaling up the optical components, and the other approach involves integrating the LC materials into high-frequency electric circuits. A three-dimensional (3D) printer is used to fabricate the Fresnel lens, which is a typical quasi-optical device useful in the MMW region, where we can develop the tunable lens by introducing LC materials. A planar-type MMW waveguide is advantageous for integrating the LC materials to develop LC MMW devices using the second approach. We investigated a useful microstrip-line-type LC phase shifter by developing a novel conversion circuit to introduce the LC material onto the dielectric substrate surface. A phase shifter is an important MMW component that is used to attain a phased array antenna system, and a minimal twin antenna array is demonstrated using the microstrip-line-type LC phase shifters.

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13

Utsumi, Yozo, Toshihisa Kamei, and Ryo Naito. "Dielectric properties of microstrip-line adaptive liquid crystal devices." Electronics and Communications in Japan (Part II: Electronics) 87, no. 10 (2004): 13–24. http://dx.doi.org/10.1002/ecjb.20082.

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14

Stevens, C. J., C. R. M. Grovenor, and D. J. Edwards. "Selective epitaxial fabrication of TBCCO microstrip devices and structures." Superconductor Science and Technology 13, no. 12 (November 16, 2000): L31—L33. http://dx.doi.org/10.1088/0953-2048/13/12/101.

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15

Mezaal, Y. S., S. F. Abdulkareem, and J. K. Ali. "A Dual-Band Printed Slot Antenna for WiMAX and Metrological Wireless Applications." Advanced Electromagnetics 7, no. 3 (August 16, 2018): 75–81. http://dx.doi.org/10.7716/aem.v7i3.765.

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New microstrip antenna initiated from the portions of 1st order structures of Sierpinski square geometry is modeled in this paper as quasi-fractal device using an FR4 substrate of 4.4 dielectric constant, 1.6 mm thickness and 0.02 loss tangent. The intended microstrip antenna is designed for band frequencies of 3.5 and 7.8 GHz for WiMAX and metrological satellite applications with a bandwidth of 0.66 and 0.78 GHz for each band respectively. The designed antenna has considerable compact size that is smaller than many reported fractal and non-fractal antenna structures in the literature. Also, it has interesting return loss and radiation results that can be employed in diverse wireless devices. Measured input reflection coefficient, radiation patterns and gain results have been found in good agreement with those predicted by simulations.

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16

Zheng, Xuemei, and Tao Jiang. "Triple Notches Bandstop Microstrip Filter Based on Archimedean Spiral Electromagnetic Bandgap Structure." Electronics 8, no. 9 (August 30, 2019): 964. http://dx.doi.org/10.3390/electronics8090964.

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Анотація:

With the development of artificial electromagnetic structures, defective grounding structures (DGS), defective microstrip structures (DMS), and electromagnetic bandgap (EBG) have been widely used in the design of microstrip filters. In this paper, a triple notches ultra wideband bandstop microstrip filter based on Archimedean spiral electromagnetic bandgap structure (ASEBG) structure is proposed. Firstly, the equivalent circuit of ASEBG is analyzed, and L and C values are extracted by using Advanced Design System (ADS). Secondly, the correctness of the lumped parameter model is verified by comparing the High Frequency Structure Simulator (HFSS) simulation results with the measured results. Finally, the influence of ASEBG structure parameters on resonant performance is analyzed by HFSS simulation, and the filter parameters are further optimized. By coupling ASEBG structure to existing double notch microstrip filters, a triple notches ultra wideband bandstop microstrip filter is realized. This method can also be used in the design of other microstrip devices with stopband characteristics. The three bandgap center frequencies of the proposed triple notches ultra wideband bandstop microstrip filter are 3.5, 5.2, and 7.4 GHz, respectively. The corresponding maximum attenuation of the three stopbands is 33.6, 24.8, and 21.7 dB, respectively.

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17

Harkouss, Youssef. "Accurate modeling and optimization of microwave circuits and devices using adaptive neuro-fuzzy inference system." International Journal of Microwave and Wireless Technologies 3, no. 6 (July 1, 2011): 637–45. http://dx.doi.org/10.1017/s1759078711000651.

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In this paper, an accurate neuro-fuzzy-based model is proposed for efficient computer-aided design (CAD) modeling and optimization of microwave circuits and devices. The adaptive neuro-fuzzy inference system (ANFIS) approach is used to determine the scattering parameters of a microstrip filter and is applied to the optimization design of this microstrip filter. The ANFIS has the advantages of expert knowledge of fuzzy inference system and learning capability of artificial neural networks. The neuro-fuzzy model has been trained and tested with different sets of input/output data. Finally, different results, which confirm the validity of the proposed model, are reported.

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18

Ding, Daye, Ruozhou Li, Jing Yan, Jiang Liu, Yuming Fang, and Ying Yu. "Influence of Microcracks on Silver/Polydimethylsiloxane-Based Flexible Microstrip Transmission Lines." Applied Sciences 11, no. 1 (December 22, 2020): 5. http://dx.doi.org/10.3390/app11010005.

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Microcrack is commonly seen as a defect in materials that affects the performance of flexible radio frequency (RF) devices. Here, we investigate the influence of microcracks on the RF characteristics of flexible microstrip by stretching flexible microstrip that is based on polydimethylsiloxane (PDMS) substrate and an Ag microparticles/PDMS (AgMP/PDMS) composite conductor. The RF characteristics of the microstrip were monitored with a variety of tensile displacements. An equivalent circuit model of the microstrip with microcracks was proposed to reveal the mechanisms. The fitting results matched the actual measurement well. In addition, the morphology of the microcracks was characterized by SEM and the direct-current (DC) resistance was monitored. The results show that the changes in equivalent circuit element parameters (R, L, C) are due to the change in the conductive pathways, which affect the transmission and reflection of the RF signals.

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19

Diana, Mery, Refdinal Nazir, and Arief Rufiyanto. "Harvesting RF Ambient Energy dari End Device LoRa (Long Range Access)." JURNAL INFOTEL 9, no. 4 (November 7, 2017): 387. http://dx.doi.org/10.20895/infotel.v9i4.282.

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RF Energy Harvesting is a technology that harvest RF ambient energy from the wearable devices. One of wearable devices that can act as a source is LoRa end device. LoRa (Long Range Access) is part of Low Power Wide Area Network (LPWAN) which operate in unlicensed frequency (ISM). As a technology of wireless network, end devices of LoRa will be taken in remote area that hardly to access. End device LoRa acts as a transceiver that transmits and receives data from the gateway. As a transceiver, the LoRa end device requires energy availability. In remote area, RF ambient energy from the LoRa end device can be utilized as a source of RF energy that can be harvested and stored This paper discusses how to harvest the RF ambient energy emitted by the LoRa end device using the microstrip antenna as the receiver and the voltage multiplier as both a rectifier and a voltage multiplier. The energy harvested from one end device and stored temporarily in the capacitor is 163pJ with a distance 11 cm from the source. This harvested energy can be stored on battery or capasitor bank to be used in future

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20

Cao, Meng, Wei Feng, Rainer Pietig, and Hong-cai Wu. "Design of Microstrip Ferrite-Coupled Line Devices Using Perturbation Theory." Japanese Journal of Applied Physics 45, no. 4A (April 7, 2006): 2621–27. http://dx.doi.org/10.1143/jjap.45.2621.

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21

LEE*, Hanju. "Research on Microstrip Transmission Line Design for Microwave Memristive Devices." New Physics: Sae Mulli 70, no. 12 (December 31, 2020): 1030–37. http://dx.doi.org/10.3938/npsm.70.1030.

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22

Sarkar, B. K., K. Easwar, R. Pinto, and P. R. Apte. "Unique Multi-parameter Dependence Considerations for Passive HTSC Microstrip Devices." IETE Technical Review 10, no. 4 (July 1993): 355–57. http://dx.doi.org/10.1080/02564602.1993.11437354.

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23

Tidjani, Nassima, Sébastien Bissey, Sébastien Jacques, and Jean-Charles Le Bunetel. "Microstrip Filter Against the Crosstalk Effect in Planar Power Devices." Journal of Low Power Electronics 14, no. 2 (June 1, 2018): 365–71. http://dx.doi.org/10.1166/jolpe.2018.1555.

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24

Belyaev, B. A., A. A. Leksikov, A. M. Serzhantov, and V. F. Shabanov. "Physical principles of the design of electrically controllable microstrip devices." Russian Physics Journal 51, no. 9 (September 2008): 919–29. http://dx.doi.org/10.1007/s11182-009-9136-4.

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25

Sagar, Shetty, Hajare Rohit, Kriti Gupta, and Bhagat Namrata. "ANALYSIS OF UWB BASED ANTENNA FOR WIRELESS COMMUNICATION." International Journal of Engineering Technologies and Management Research 5, no. 2 (April 25, 2020): 30–34. http://dx.doi.org/10.29121/ijetmr.v5.i2.2018.609.

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Анотація:

Ultra-wideband wireless communications techniques have many merits, including an extremely simple radio that inherently leads to low-cost design, large processing gain for robust operations in the presence of narrowband interference, covert operations, and fine time resolution for accurate position sensing. However, there are a number of challenges in UWB receiver design, such as capturing multipath energy, inter symbol interference especially in a non-line-of-sight environment, and the need for high-sampling-rate analog-to-digital converters. Microstrip Patch antenna (MPA) provides low profile and low volume, so it is use in a now a days communication devices. In this paper study of past few year shows that most of labour on MPA is targeted on planning compact sized microstrip antenna. A novel ultra-wideband printed monopole antenna can be used in wireless communication devices.

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26

Zheng, Xuemei, Tao Jiang, Hao Lu, and Yanyan Wang. "Double-Layer Microstrip Band Stop Filters Etching Periodic Ring Electromagnetic Band Gap Structures." Electronics 9, no. 8 (July 28, 2020): 1216. http://dx.doi.org/10.3390/electronics9081216.

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Анотація:

The electromagnetic band gap structure (EBGs) is widely used in microwave engineering, such as amplifiers, waveguides, microstrip filters, due to the fact of its excellent band stop characteristics. In this paper, three kinds of microstrip band stop filters were proposed which were etched with a hexagonal ring EBGs, octagonal ring EBGs and elliptical ring EBGs. Firstly, the etching coefficient of a band stop filter is proposed, and the performance of filters with different etching coefficient was analyzed. Secondly, the equivalent circuit of an EBGs band stop filter is proposed. By comparing the simulation results using advanced design system (ADS) and high frequency structure simulator (HFSS), it was found that the simulation results had the same −10 dB stopband width which verifies the correctness of the equivalent circuit model. Finally, three kinds of microstrip stopband filters were fabricated and measured. The experimental results of the −10 dB stopband width and resonant frequency were in good agreement with the simulation results. The −10 dB stopband fractional bandwidth of the three kinds of microstrip stopband filters was more than 63%. The proposed microstrip band stop filters can be widely used in microwave devices with a wide stopband.

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27

Soontornpipit, Pichitpong. "Comparison of Implantable Antennas for Cardiovascular Patients." Applied Mechanics and Materials 781 (August 2015): 595–98. http://dx.doi.org/10.4028/www.scientific.net/amm.781.595.

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Implantable device cardiac observation (ICDO) such as pacemaker requires communication with medical devices outside the body in order to monitor or control the parameters of the organ it is supporting. Three types of implantable antennas have been investigated to determine their performances on two patient conditions: normal and hyperglycemia. Folded dipole, serpentine microstrip, and waffle-type Planar Inverted-F (PIFA) antennas are operated in the 402-405 MHz, which is medical implant communication services (MICS) band. Detailed analysis of the design issues of the antennas and comparative results of simulations and measurements are presented.

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28

Vasjanov, Aleksandr, and Vaidotas Barzdenas. "Reduced-Reflection Multilayer PCB Microstrip with Discontinuity Characterization." Electronics 9, no. 9 (September 9, 2020): 1473. http://dx.doi.org/10.3390/electronics9091473.

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Анотація:

In the era of technology and communication, printed circuit boards (PCBs) can be found in a myriad of devices—from ordinary household items, to state of the art custom metrology equipment. Different types of component for wireless communications are available and come in various packages, supplied by multiple manufacturers. The signal landpads for some high-frequency connectors and components, encapsulated in larger packages, are usually wider than the controlled impedance trace, thereby introducing unwanted impedance mismatch and resulting in signal reflections. The component land pad and microstrip width a discrepancy issue can be found in both complex high-density industrial devices and system-level academic research papers. This paper addresses the topic of compensating discontinuities, introduced by signal pads, which are wider than the target impedance microstrip, characterizes the difference between the compensated and uncompensated microstrip with discontinuity, and proposes a generalized guideline on compensating for the introduced impedance change in multilayer PCBs. The compensation method is based upon carefully designing the stackup of the PCB allowing for a reference plane cutout under the discontinuity to even out the impedance mismatch. A 6-layer PCB with IT180A dielectric material containing three structures has been manufactured and characterized using an Agilent E8363B vector network analyzer (VNA). A 4–12 dB improvement in S11 response in the whole frequency range up to 10 GHz, compared to that when no compensation has been applied, was observed.

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29

Chen, Guo Zhi, Guo Tong Chen, Jian Sun, and Jing Miao. "Research on Mechanical Design with Beidou GPS Navigation Antenna Design Terminal." Applied Mechanics and Materials 345 (August 2013): 416–20. http://dx.doi.org/10.4028/www.scientific.net/amm.345.416.

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With advances in technology and machinery manufacturing technology, the satellite navigation system plays a more and more important role in the modern society. People demand increasingly for satellite navigation. Satellite navigation is increasingly used in military systems, so military and civilian value is higher and higher. For the satellite signal reception, microstrip antenna plays an indispensable role. As the mechanical design of microstrip antenna is simple, easy manufacture, low cost, smaller size, lighter weight, with the overall unity of active devices and integrated circuit, etc. The successful development of high dielectric constant ceramic material enables the area of microstrip antenna to narrow several times. Microwave dielectric ceramics material has some merits such as high dielectric constant, thermal stability and excellent characteristics of small dielectric loss. Different dielectric constant substrate can be prepared through changing and doping modification of process parameters, including the relative dielectric constant of microwave dielectric ceramics for more than a few dozens which can be used for different microwave frequencies. Those are important reasons for promoting the development of microstrip antenna.

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30

Marcotegui, J. Antonio, Jesús Miguel Illescas, Aritz Estevez, and Francisco Falcone. "Compact Ultra Wide Band Microstrip Bandpass Filter Based on Multiple-Mode Resonator and Modified Complementary Split Ring Resonator." Scientific World Journal 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/402539.

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A new class of broadband microstrip filters for Ultra Wide Band (UWB) applications is proposed. In the design, different stages of parallel-coupled microstrip line and other stages with a Modified Complementary Split Ring Resonator (MCSRR)—a concept proposed here for the first time—are adjusted to obtain the desired response with broadband, sharp rejection, low insertion loss, and low return loss. Full wave simulation results as well as measurement results from fabricated prototypes are presented, showing good agreement. The proposed technique offers a new alternative to implement low-cost high-performance filter devices, applicable to a wide range of communication systems.

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31

Yahya, Salah I., Abbas Rezaei, and Leila Noori. "Design and Performance of Microstrip Diplexers: A Review." ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY 8, no. 1 (March 15, 2020): 38–49. http://dx.doi.org/10.14500/aro.10634.

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The radiofrequency microstrip diplexers are widely demanded nowadays by modern wireless communication systems. Hence, several types of previously reported microstrip diplexers are reviewed and investigated in this work. Microstrip diplexers are three ports devices used for separating desired signals and delivering them through two (or more) different channels. The diplexers are investigated in three categories of dual-channel bandpass-bandpass diplexers, multichannel diplexers, and lowpassbandpass diplexers. The investigated multi-channel diplexers include a number of four-channel, six-channel, and eight-channel diplexers. Due to the hard design process, the number of reported diplexers with more than four channels is limited. The layout structures and theory design methods of the previously reported diplexers are studied. Moreover, their size and performance are compared while some explanations about their advantages and disadvantages are presented. This comparison includes insertion loss, return loss, fractional bandwidths, isolation, selectivity, and gaps between channels.

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32

Ohshima, S., M. Endo, K. Takeda, K. Nakagawa, T. Honma, S. Sato, S. Takahashi, Y. Tanaka, and A. Saito. "Improved Power Handling Capability of Superconducting Microstrip Lines for Microwave Devices." Physics Procedia 36 (2012): 429–34. http://dx.doi.org/10.1016/j.phpro.2012.06.258.

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33

Ghouz, Hussein Hamed Mahmoud, Mohamed Fathy Abo Sree, and Muhammad Aly Ibrahim. "Novel Wideband Microstrip Monopole Antenna Designs for WiFi/LTE/WiMax Devices." IEEE Access 8 (2020): 9532–39. http://dx.doi.org/10.1109/access.2019.2963644.

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34

de los Reyes, Elías, Javier García, David Marqués, Antonio Jara, and Ruth de los Reyes. "Novel Adjustable Microstrip Devices for Microwave Power Division and Impedance Matching." Journal of Microwave Power and Electromagnetic Energy 48, no. 1 (January 2014): 13–24. http://dx.doi.org/10.1080/08327823.2014.11689868.

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35

Ivakhnenko, V. I., and A. S. Il'inskii. "Numerical method of investigation of diffraction problems in irregular microstrip devices." Computational Mathematics and Modeling 1, no. 3 (July 1990): 332–39. http://dx.doi.org/10.1007/bf01126586.

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36

Shandal, S. A., Y. S. Mezaal, M. F. Mosleh, and M. A. Kadim. "Miniaturized Wideband Microstrip Antenna for Recent Wireless Applications." Advanced Electromagnetics 7, no. 5 (September 4, 2018): 7–13. http://dx.doi.org/10.7716/aem.v7i5.806.

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Анотація:

In this paper, a pentagon slot inside fractal circular patch microstrip resonator to design compact antenna over partial ground plane is introduced using 3rd iteration of adopted fractal geometry. This antenna is modeled on FR4 substrate with a size of (20 x 18) mm2, thickness of 1.5mm, permittivity of 4.3 and loss tangent of 0.02. The used type of feeding is microstrip line feed. It is designed to operate at wide frequency range of (4.5-9.3) GHz at resonant frequencies of 5.7GHz and 7.9GHz with impedance bandwidth of 4.8 GHz. Both lengths of ground plane Lg and width of feed line Wf are optimized in order to acquire optimum bandwidth. The simulated return loss values are -33 and -41 dB at two resonant frequencies of 5.7 and 7.9 GHz with gain of 3.2 dB. The simulated results offered noteworthy compatibility with measured results. Also, the proposed wideband microstrip antenna has substantial compactness that can be integrated within numerous wireless devices and systems.

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37

Tiwari, Rovin, Raghavendra Sharma, and Rahul Dubey. "Microstrip Patch Antenna Array Design Anaylsis for 5G Communication Applications." SMART MOVES JOURNAL IJOSCIENCE 6, no. 5 (May 22, 2020): 1–5. http://dx.doi.org/10.24113/ijoscience.v6i5.287.

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Анотація:

A research on Antenna design and simulation is a emerging area among researchers. Antenna is a basic element for wireless communication. There are various shaps and types of antenna, which uses in different allpication. Now a days Microstrip patch anteena is very useful in advance electronics devices applications. This paper focused on study based various types of microstrip antenna. Return loss, VSWR, bandwidth, resonant frequency and gain is key parameters to judge antenna performance. Good value of return loss is less than -10dB. Considerable range of VSWR is 1-2. CST microwave studio is a advance software to design and simulation of all types of antenna, filter etc.

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38

Meneses González, Salvador Ricardo, and Rita Trinidad Rodríguez Márquez. "Microstrip Antenna Design for 3.1-4.2 GHz Frequency Band Applied to 5G Mobile Devices." European Journal of Engineering Research and Science 4, no. 10 (October 24, 2019): 111–15. http://dx.doi.org/10.24018/ejers.2019.4.10.1570.

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Actually Internet of Things (IoT) applications, from driverless cars, mobile devices, smart homes and smart cities are highly requested by the costumers, obliging telecommunication businesses operators established in countries to provide shortly this significant and inevitable technological leap forward. 5G is the technology that will enable these smart mobile devices to be well connected. These devices are becoming smaller, therefore and because to the high degree of miniaturization and an efficient wireless link, small antennas, which satisfies gain, resonance frequency, wideband, impedance, and low cost are demanded, which dimensions are enough small for be assembled into these kinds of mobile devices. This work proposes a wide bandwidth ranging from 3.1 GHz – 4.2 GHz Slotted Planar Microstrip Patch Antenna, applied to first trials and introduction of 5G services, describing the design, simulation, implementation, measurement and experimental results.

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39

Glushechenko, E. N. "Microstrip doubler microwave with non-traditional implementation." Технология и конструирование в электронной аппаратуре, no. 1-2 (2019): 20–26. http://dx.doi.org/10.15222/tkea2019.1-2.20.

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Frequency multipliers are used in electronic devices to generate spectrally pure sinusoidal signals in the frequency range from a few to tens of GHz. The multipliers are used to multiply the frequency of highly stable but more low-frequency devices with the subsequent extraction of the necessary harmonics from the frequency spectrum of the received microwave range. The frequencies selected after multiplication (set) have significantly higher energy, spectral and range characteristics, which allows them to be used as local oscillators and synthesizers in receiving and transmitting systems. The authors of this paper theoretically substantiate and practically demonstrate the possibility of an unconventional implementation of a microstrip multiplier of the microwave range based on a directional traveling wave filter. The proposed implementation does not require the use of active semiconductor elements. The well-known circuit and technological principles for the creation of microstrip microwave multipliers are considered in the paper. The features, problems and shortcomings arising from their implementation are analyzed. The effectiveness of using the balanced circuit for frequency multiplication is confirmed. A list of mandatory requirements and conditions necessary for the implementation of the microwave multipliers is given. It is demonstrated that the features of the microstrip travelling-wave filter are identical to the conditions and requirements for the implementation of balanced multipliers. It is shown and substantiated how an unconventional implementation of a passive microwave multiplier is possible due to the electromagnetic interaction of the input and output nodes of such a filter with an annular travelling-wave resonator. Using the example of modifying a block diagram of a directional filter into a multiplier circuit, the possibility of creating a microwave doubler is confirmed by separating a given frequency from the frequency spectrum of a traveling-wave ring resonator.

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40

Yildiz, Azra, and Şehabeddin Taha İmeci. "30 dB microstrip coupler with high directivity." Sustainable Engineering and Innovation 2, no. 1 (February 25, 2020): 26–33. http://dx.doi.org/10.37868/sei.v2i1.40.

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Анотація:

Due to inhomogeneous structure of a microstrip directional couplers, i.e. partly dielectric substrate, partly air, they mostly present property of poor directivity and low coupling level. High directivity is achieved by a capacitive compensation by gap coupling of open stub formed in sub-coupled line. Neverthless, these couplers have advantage of easy fabrication, lightweight and incorporation with other microwave devices, and is validated via design using Sonnet software. The main goal was to obtain coupling around -30 dB, meaning that almost all power is passed to the output, with a wide band, from around 3.5GHz to nearly 9GHz. Desired values have been obtained, including isolation and input match reaching -70 dB.

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41

Hong, Sung-June, Min-Pyo Lee, Seil Kim, Jun-Su Lim, and Dong-Wook Kim. "A Ku-Band Low-Loss Traveling-Wave Power Divider using a Hollow Substrate Integrated Waveguide and Its Microstrip Transition." Journal of Electromagnetic Engineering and Science 20, no. 2 (April 30, 2020): 131–38. http://dx.doi.org/10.26866/jees.2020.20.2.131.

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In this paper, we present a Ku-band low-loss traveling-wave power divider that uses a hollow substrate integrated waveguide (HSIW). For easy connection with microstrip-based devices and circuits, a low-loss transition between the microstrip line and the HSIW structure was implemented using C-cut via holes at the discontinuity interface, which reduces radiation and leakage effects and improves mismatch performance. To validate the performance of the transition, a back-to-back microstrip-to-HSIW transition was designed, fabricated, and measured from 12.5 GHz to 15.5 GHz. The measured results showed a return loss of 18 dB or more and an insertion loss of 0.5 ± 0.07 dB. An HSIW-based, low-loss 1:3 traveling-wave power divider was fabricated and measured from 13.5 GHz to 14.5 GHz. The power divider showed a return loss of at least 21 dB, an insertion loss of 0.57 ± 0.03 dB, and a power combining efficiency of 87.1%–88.3%.

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42

Zhang, Ke, Changrong Liu, Xueguan Liu, Huiping Guo, and Xinmi Yang. "Miniaturized Circularly Polarized Implantable Antenna for ISM-Band Biomedical Devices." International Journal of Antennas and Propagation 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/9750257.

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A compact circularly polarized antenna operating at 915 MHz industrial, scientific, and medical (ISM) band for biomedical implantable applications is presented and experimentally measured. The proposed antenna can be miniaturized to a large extent with the compact size of 15 × 15 × 1.27 mm3 by means of loading patches to a ring-shaped microstrip patch antenna. An impedance bandwidth of 10.6% (865–962 MHz) for reflection coefficient less than −10 dB can be obtained. Meanwhile, the simulated 3 dB axial-ratio (AR) bandwidth reaches 14 MHz. Finally, the optimized design was fabricated and tested, and the measured results agree well with simulated results.

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43

Mezaal, Y. S., H. H. Saleh, and H. Al-saedi. "New Compact Microstrip Filters Based on Quasi Fractal Resonator." Advanced Electromagnetics 7, no. 4 (September 3, 2018): 93–102. http://dx.doi.org/10.7716/aem.v7i4.883.

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This paper presents new microstrip devices as single band bandpass and multi band bandstop filters. The proposed filters use slotted patch microstrip resonator based on quasi fractal geometry, simulated by AWR12 software package. Both filters have quasi elliptic frequency response, designed at centre frequency of 2.437 GHz for bandpass filter and at band frequencies of 2.434, 4.032, 4.976 and 5.638 GHz GHz respectively, for multi bandstop filter. All filters are employed using RT/Duroid 6010.8 LM substrate of dielectric constant and 1.27 mm dielectric thickness. Simulation results show that the designed quasi fractal bandpass filter has very narrow fractional bandwidth of 0.38 % which is very rare in microstrip filter design. On the other hand, the projected bandstop filter offers multi narrow rejection bands that is useful in broadband wireless schemes influencing from fixed interferences. Both filters present satisfactory S11 and S21 responses besides smallness properties that stand for interesting features of the newest wireless applications. The simulated and measured frequency responses for both designed filters are in good agreement.

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44

Lim, Eunsook, Dong-Hyo Lee, and Seongmin Pyo. "Dual-Band Orthogonal-Polarization Microstrip Antenna for Vehicle-to-Nomadic Devices Communication." Journal of Korean Institute of Electromagnetic Engineering and Science 26, no. 7 (July 30, 2015): 606–12. http://dx.doi.org/10.5515/kjkiees.2015.26.7.606.

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45

Semenov, A. S., A. G. Nalogin, and A. A. Alekseev. "Development of microstrip ferrite decoupling devices for mm-wave range microwave equipment." Journal of Physics: Conference Series 1499 (March 2020): 012053. http://dx.doi.org/10.1088/1742-6596/1499/1/012053.

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46

Belyaev, B. A., S. A. Khodenkov, and V. F. Shabanov. "Investigation of frequency-selective devices based on a microstrip 2D photonic crystal." Doklady Physics 61, no. 4 (April 2016): 155–59. http://dx.doi.org/10.1134/s1028335816040017.

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47

Lan, Yu, and Yuehang Xu. "Bending Limit Tests for Ultra-Thin Liquid Crystal Polymer Substrate Based on Flexible Microwave Components." Micromachines 9, no. 10 (October 20, 2018): 531. http://dx.doi.org/10.3390/mi9100531.

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In this paper, bending limit tests for one ultra-thin liquid crystal polymer (LCP) substrate (Rogers 3850) based on the mechanical properties of flexible microwave microstrip components are presented. First, a set of 50 Ω microstrip lines, a band-pass filter, and a stepped impedance filter in X-band, are designed by using double clapped LCPs with 50 μm thickness of substrate and 18 μm thickness of copper, which is fabricated by conventional photolithography. Then, the limit tests of the flexibility of the LCP microwave microstrip components are presented, and the range of the bending limit radius, from 1 mm to 0.75 mm, is demonstrated from the testing results. It is found that the cause for component failure is fracture of the copper (18 μm thickness) laminate, according to the bending limit test experiments. Finally, the analysis of the reasons for the collapse of the microwave components, under bending situations, is explored. The results from this work would be useful for further designs of the flexible microwave devices and systems on LCP substrates, with compact sizes and good performance.

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48

Ma, Zhong-Hua, Jia-Xiang Chen, Peng Chen, and Yan Feng Jiang. "Design of Planar Microstrip Ultrawideband Circularly Polarized Antenna Loaded by Annular-Ring Slot." International Journal of Antennas and Propagation 2021 (March 17, 2021): 1–10. http://dx.doi.org/10.1155/2021/6638096.

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A miniaturized planar microstrip circularly polarized ultrawideband (UWB) antenna loaded by annular-ring slot is proposed and implemented in the paper. With the annular-ring slot loaded in the radiating patch of the antenna, the side of the radiating patch is connected by the asymmetric inverted L-shaped microstrip. At the same time, a quarter of a circle is cut off from the radiating patch. The above designed structure shows improvements on the operating frequency band and realization of the circular polarization radiation. A tapered microstrip is placed between the feed line and the radiating patch to achieve the slow-changing impedance transformation. The results of simulation and measurement demonstrate that the 3 dB axial ratio (AR) fractional bandwidth of the antenna structure achieves 21.25%. The peak gain within the 3 dB axial ratio bandwidth fluctuates between 3.74 and 4.59 dBi. The antenna shows good impedance matching in the ultrawideband range. With the compact structure of the UWB antenna, it has potential application in various wireless communication devices.

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49

GRECO, M., E. MENICHETTI, G. RINAUDO, S. MAGGI, and V. LACQUANITI. "DEVELOPMENT OF SUPERCONDUCTING Nb/Al DETECTORS." International Journal of Modern Physics B 14, no. 25n27 (October 30, 2000): 3122–27. http://dx.doi.org/10.1142/s0217979200003411.

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We have fabricated superconducting Nb/Al microstrip detectors. The low sensitivity to radiation damage and aging and the high energy resolution make these devices very attractive. The samples are fabricated by superposing a 2 mm × 2 mm Al area on a 5 μm wide, 100 μm long Nb strip. The thickness of each film is between 50 and 200 nm. We present the results both of steady and dynamical tests on Nb/Al bilayers, after irradiation with a 241 Am alpha-source (T = 5.47 MeV ). These devices can operate both in the on-off and in the auto-recovery regimes. We show that the performance of Nb/Al bilayers is better than single Nb strip devices.

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50

Siva Reddy, B., M. V.R.Vittal, and Salai ThillaiThilagam.J. "Design of rectangular patched microstrip antenna at 2300 MHz." International Journal of Engineering & Technology 7, no. 3 (June 14, 2018): 1005. http://dx.doi.org/10.14419/ijet.v7i3.12646.

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Анотація:

This research paper explains the design of rectangular shaped patch microstrip antenna power fed with coaxial probe feed, which is working around 2300 MHz 4G LTE band of frequency. It is designed by using the FR4 substrate. It applies to the devices which work around this frequency. Theoretical calculations are made and simulation results are performed using Zeland IE3D Software. Their simulation of antenna results exhibits the gain of 1.5 dB, return loss of -14 dB, VSWR of 1.5 and bandwidth of 80 MHz.

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