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Gyro-Chirality Effect of Bianisotropic Substrate on the Resonant Frequency and Half-power Bandwidth of Rectangular microstrip Patch antenna

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Computers, Materials & Continua 2016年第5期52卷 123-131页

作者： C.Zebiri D.Sayad S.Daoudi F.Benabdelaziz M.Lashab R.A.Abd-Alhameed Electronics Department University Ferhat Abbas of SETIF-1-19000 SETIFALGERIA Electronics Department University 20 Aout 195521000 SKIKDAALGERIA Electronics Department University Mentouri of Constantine-1-25000 CONSTANTINEALGERIA School of Electrical Engineering and Computer Science University of BradfordBD71DPUK

In this paper,the gyrotropic bi-anisotropy of the chiral medium in substrate constitutive parameters(xc and hc)of a rectangular microstrip patch antenna is introduced in order to observe its effects on the complex resonant frequency and half-power bandwidth.The analysis is based on the full-wave spectral domain approach using the Moment Method,with sinusoidal type basis functions.The numerical calculations related to the dominant mode have been carried out,and it has been observed that the resonant frequency and the bandwidth are directly linked to the medium chirality.The new results can be considered as a generalisation form of the previously published work.

关键词： microstrip antenna Chiral Gyrotropy Bi-anisotropy Moment Method

Designing a Dual-Feed Circular Polarization antenna

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Journal of Electronic Research and Application 2024年第3期8卷 255-261页

作者： Binghao Zeng Haokui Zhu Shenzhen Surbaner Technology Co. Ltd.Shenzhen 518000Guangdong ProvinceChina

This paper describes a novel dual-feed circularly polarized antenna,and the dual feeding mode is realized by grooving on the antenna radiator.The antenna utilizes air dielectric material to meet the requirements of low weight and cost.Test results demonstrate that the antenna exhibits capacitive loading between the metal antenna patch and the ground floor,allowing for adjustment of the working frequency of the dual-feed circularly polarized microstrip antenna.Specifically,the original center frequency of 2.264 GHz was reduced to 1.582 GHz,facilitating antenna miniaturization and broad bandwidth.With a return loss(S11)below-10 dB,a bandwidth of 72 MHz(1.552-1.624 GHz)was obtained.Additionally,the dual-feed microstrip antenna incorporates a 90°bridge,resulting in circular polarization gains of 2.26 dBi at 1.561 GHz and 2.45 dBi at 1.575 GHz.Overall,the antenna design offers a large working bandwidth and excellent circular polarization characteristics,making it suitable for a wide range of applications in satellite navigation and positioning terminals.

关键词： Air dielectric Circular polarization Dual-feed microstrip antenna

EFFICIENT ANALYSIS OF ELECTROMAGNETIC RADIATION FROM microstrip antenna USING VOLUME-SURFACE CURRENT CONTUNUITY METHOD

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Journal of Electronics(China) 2012年第6期29卷 567-571页

作者： Yuan Jiade Su Kaixiong Ye Yuhuang College of Physics and Information Engineering Fuzhou University

The Volume-Surface Current Continuity Method (VSCCM) is presented to analyze electromagnetic radiation from microstrip antenna. The microstrip antenna is discretized into small triangular patches on conducting surface and tetrahedral volume cells in dielectric region. The Method of Moments (MoM) is applied to solve the integral equation. An equation contains the restriction relation between the volume and surface current coefficient is derived from the current continuity equation at those parts where the conducting surface is in contact with the dielectric material. A simple equivalent strip model is introduced in the treatment of the feeding probe in VSCCM. The VSCCM can reduce the unknowns required to be solved in MoM, as well as the condition number of the matrix equation. Numerical results are given to validate the accuracy and efficiency of this method.

关键词： Method of Moments (MoM) Volume-Surface Integral Equation (VSIE) microstrip antenna Volume-Surface Current Continuity Method (VSCCM)

Dual-Polarized Slot-Coupled microstrip antenna with Very High Isolation

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Journal of Shanghai University(English Edition) 2005年第4期9卷 336-338页

作者：钟顺时梁仙灵汪伟 School of Communication and Information Engineering Shanghai University Shanghai 200072 P.R. China

A wideband dual-polarized slot-coupled stacked microstrip antenna with very high isolation and low cross-polarization is presented. To improve isolation between two poiarization ports, the stacked patches are excited by an open-ended and a T-shaped microstrip lines both via two H-shaped slots placed in a ＂T＂ configuration. The measured isolation is better than 40.5 dB over the bandwidth from 8.8 to 9.8 GHz with cross-polarization level less than - 28.5 dB. The measured VSWR ≤ 2 bandwidths reach 20.7 96 and 19.196 at the verrical and horizontal polarization ports, respectively. This antenna is suitable to be used as array elements in spacebome synthetic aperture radars （SAR） and active phased array radars.

关键词： microstrip antenna dual-polarization isolation cross-polarization.

The Effect of Laminate Angles in Composite Substrates on the Performance of Rectangular microstrip antenna

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Journal of Electromagnetic Analysis and Applications 2016年第12期8卷 261-270页

作者： C. C. Hung S. M. Yang Department of Aeronautical and Opto-Mechatronic Engineering Vanung University Taiwan Department of Aeronautics and Astronautics National Cheng Kung University Taiwan

The performance of a microstrip antenna has been known sensitive to substrate’s dielectric properties, which is dependent on the angle of laminate layers inside a composite laminated substrate. Modal analysis in spectral domain is applied to investigate the resonant frequency and radiation pattern of rectangular microstrip antenna on composite substrates. It is shown that the substrate’s dielectric properties are dependent upon the laminate angles, i.e., upon the orientation of the antenna relative to the substrate’s fiber direction. For the same operating frequency, the antenna size on composite substrates is larger than that on isotropic substrates, and the far field pattern is also more directional.

关键词： Spectral Domain Analysis microstrip antenna Composite Materials

Corner Fed microstrip antenna Analysisfor Dual Polarization

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Advances in Manufacturing 1999年第4期3卷 279-281页

作者： Mohammed Ahmed ZHONG Shun shi (School of Communication and Information Engineering, Shanghai University) School of Communication and Information Engineering Shanghai University

This paper investigates a corner fed microstrip patch antenna by means of the cavity model with proposed feed modeling. The input impedance and radiation patterns for a corner feed are calculated. The mutual coupling between two corner feeds is investigated. An improvement in mutual coupling has been found for corner feeds relative to edge feeds, which is helpful for the design of dual polarized antenna arrays in wireless communication and radar applications.

关键词： microstrip antenna dual polarization input impedance mutual coupling

Mode Purity Improvement of High-Order Vortex Waves

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Chinese Journal of Electronics 2022年第6期31卷 1146-1154页

作者： LIN Jie YANG Guang LI Weiwen AN Cheng Department of Electronic Engineering Xiamen University

Vortex electromagnetic waves can carry orbital angular momentum(OAM) modes of different order number, which are mutually orthogonal. Communication technologies multiplexing different OAM topological charges have attracted extensive attention in improving spectrum utilization. In this regard, the efficient generation of OAM modes becomes a key issue. However, it is difficult to generate high-order OAM modes by using a microstrip antenna with a simple structure, and the mode purity is usually not high. Methodologically, the OAM wave of a microstrip antenna is mostly achieved by synthesizing degenerate eigenmodes. In this paper, combined with eigenmode analysis, the construction of high-order and high-purity OAM mode microstrip antennas is carried out from the perspectives of radiating element,ground plane, and structural symmetry. For a regular hexagonal patch antenna of the 4th-order OAM mode,the mode purity is improved from about 40% to over 80%by removing the inner conductor of the patch layer, using a circular ground plane, and adding lug patches on the outside. This method of improving mode purity through the analysis of mode significance and characteristic current distribution also has guiding significance for the design of other high-order OAM mode patch antennas.

关键词： Vortex wave Theory of characteristic modes microstrip antenna Mode purity

Design of Miniature UWB-Based antenna by Employing a Tri-Sectional SIR Feeder

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Computer Systems Science & Engineering 2022年第6期41卷 1157-1172页

作者： Ehab Dh.Hussein Yaqeen S.Mezaal Oguz Bayat Electrical and Computer Engineering Department Altinbas UniversityIstanbulTurkey Medical Instrumentation Engineering Department Al-Esraa University CollegeBaghdadIraq

A novel ultra-wideband(UWB)-based microstrip antenna is presented in this work by using a slotted patch resonator,a tri-sectional stepped impedance resonator(SIR)feeder,as well as a reduced ground plane.The whole structure was realized on an FR4 substrate.The impact of incorporating several cases of ground planes on the input reflection has been thoroughly investigated under the same tri-sectional SIR feeder and by employing a slotted patch radiator.Since the complete ground plane presents an inadequate frequency response,by reducing the ground plane,the induced UWB responses are apparent while the antenna exhibits higher impedance bandwidth.The impact of both the uniform impedance resonator(UIR)as well as the SIR feeder on the input reflection has also been examined by following the same adopted reduced ground technique and using a slotted patch radiator.As a result,the UIR feeder exhibits a dual-band frequency response,when a wide notched band is incorporated in the range from 4.5–6.5 GHz.The dual-band response of the bi-sectional SIR feeder is still apparent with a narrower notched band in the frequency range from 4–5 GHz.As far as the tri-sectional SIR feeder is concerned,the UWB response is discernible without recording the existence of a notched band.Additionally,the antenna displays a higher impedance bandwidth compared with the previously reported steps.Our proposed antenna configuration is designed with highly compact dimensions and an overall size of 14×27.2 mm2.Moreover,it operates under the impedance bandwidth of 2.86–10.31 GHz that can be leveraged for numerous applications where wireless systems are used.Our approach presents several advantages compared with the other reported UWB-based antennas in the literature,whereas the measured S11 pattern is in good agreement with the simulated one.

关键词： microstrip antenna reduced ground plane slotted patch radiator tri-sectional stepped impedance feeder ultra-wideband

Design of a Novel Compact microstrip antenna with Enhanced Gain

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Design of a Novel Compact Microstrip Antenna with Enhanced G...