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Simulation of Electromagnetic Radiation Patterns of Microstrip Antennas in RFID Systems
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作者 Ashraf Shamseldin Yahia Nashwa Mohamed Shaalan Mostafa Abdel Fatah El-Aasser Mohamed HusseinAbdel Razik 《材料科学与工程(中英文版)》 2011年第3期354-361,共8页
关键词 RFID系统 电磁辐射 模式模拟 微带天线 无线电频率识别 RFID标签 比吸收率 吸收剂量
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Strain-Insensitive Hierarchically Structured Stretchable Microstrip Antennas for Robust Wireless Communication 被引量:2
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作者 Jia Zhu Senhao Zhang +8 位作者 Ning Yi Chaoyun Song Donghai Qiu Zhihui Hu Bowen Li Chenghao Xing Hongbo Yang Qing Wang Huanyu Cheng 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第8期1-12,共12页
As the key component of wireless data transmission and powering,stretchable antennas play an indispensable role in flexible/stretchable electronics.However,they often suffer from frequency detuning upon mechanical def... As the key component of wireless data transmission and powering,stretchable antennas play an indispensable role in flexible/stretchable electronics.However,they often suffer from frequency detuning upon mechanical deformations;thus,their applications are limited to wireless sensing with wireless transmission capabilities remaining elusive.Here,a hierarchically structured stretchable microstrip antenna with meshed patterns arranged in an arched shape showcases tunable resonance frequency upon deformations with improved overall stretchability.The almost unchanged resonance frequency during deformations enables robust on-body wireless communication and RF energy harvesting,whereas the rapid changing resonance frequency with deformations allows for wireless sensing.The proposed stretchable microstrip antenna was demonstrated to communicate wirelessly with a transmitter(input power of−3 dBm)efficiently(i.e.,the receiving power higher than−100 dBm over a distance of 100 m)on human bodies even upon 25%stretching.The flexibility in structural engineering combined with the coupled mechanical-electromagnetic simulations,provides a versatile engineering toolkit to design stretchable microstrip antennas and other potential wireless devices for stretchable electronics. 展开更多
关键词 Stretchable microstrip antennas Strain-insensitive resonance frequency Wireless communication RF energy harvesting Wearable and bio-integrated electronics
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Microstrip Antennas Loaded with Shorting Post 被引量:1
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作者 Pradeep Kumar G. Singh 《Engineering(科研)》 2009年第1期41-45,共5页
In this paper, a technical review with recent advances of the microstrip antennas loaded with shorting posts is presented. The overall size of the antenna is significantly reduced by a single shorting posts and the ef... In this paper, a technical review with recent advances of the microstrip antennas loaded with shorting posts is presented. The overall size of the antenna is significantly reduced by a single shorting posts and the effect of the various parameters of shorting posts on short-circuit microstrip antenna is also discussed. 展开更多
关键词 microstrip antennas LOADING Shorting POST Efficiency GAIN BANDWIDTH
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The Isolation of Dual-Polarization Multiplex Microstrip Antennas
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作者 Wang Baofa(Department of Electronic Engineering Beijing University of Aeronautics and Astronautics) 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 1990年第1期37-47,共11页
A simple theory is developed for the analysis of isolation of dual-polarization multiplex microstrip antennas. The analysis is based on the 'cavity model' and the 'reaction principle'. The shape of the... A simple theory is developed for the analysis of isolation of dual-polarization multiplex microstrip antennas. The analysis is based on the 'cavity model' and the 'reaction principle'. The shape of the field distribution between the patch and ground plane is assumed to be well approximated by that of the resonant modes of a corresponding magnetic and electric walled cavity. Two element microstrip antennas of various geometries for either transmitting or receiving linearly and circularly polarized waves are studied. Some methods are found to reduce their physical dimensions and to evaluate the isolation between the elements for various configurations. 展开更多
关键词 microstrip antenna lsolation Polarization.
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Resonant Length Formulations for Dual Band Slot Cut Equilateral Triangular Microstrip Antennas
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作者 Amit A. Deshmukh K. P. Ray 《Wireless Engineering and Technology》 2010年第2期55-63,共9页
The dual band equilateral triangular microstrip antennas are realized by cutting the slots of either quarter wave or half wave in length, inside the patch. In this design, however these simpler approximations of slot ... The dual band equilateral triangular microstrip antennas are realized by cutting the slots of either quarter wave or half wave in length, inside the patch. In this design, however these simpler approximations of slot length against the frequency do not give closer results for different slot lengths and there positions inside the patch. In this paper, the modal variations of slot cut patch antennas over wide frequency range are studied. It is observed that the slot does not introduce any mode but reduces the higher order mode resonance frequency of the patch and along with the fundamental mode realizes dual band response. The formulations of the resonant length for the mode introduce by the slots in these antennas are proposed. The resonance frequencies calculated using proposed formulations agree well with the simulated results with an error of less than 5%. 展开更多
关键词 Equilateral TRIANGULAR microstrip ANTENNA Dual Band microstrip ANTENNA U-Slot Pair of Rectangular SLOTS
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Artificial Intelligence in the Estimation of Patch Dimensions of Rectangular Microstrip Antennas
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作者 Vandana Vikas Thakare Pramod Singhal 《Circuits and Systems》 2011年第4期330-337,共8页
Artificial Neural Network (ANNs) techniques are recently indicating a lot of promises in the application of various micro-engineering fields. Such a use of ANNs for estimating the patch dimensions of a microstrip line... Artificial Neural Network (ANNs) techniques are recently indicating a lot of promises in the application of various micro-engineering fields. Such a use of ANNs for estimating the patch dimensions of a microstrip line feed rectangular microstrip patch antennas has been presented in this paper. An ANN model has been developed and tested for rectangular patch antenna design. The performance of the neural network has been compared with the simulated values obtained from IE3D EM Simulator. It transforms the data containing the dielectric constant (εr), thickness of the substrate (h), and antenna’s dominant-mode resonant frequency (fr) to the patch dimensions i.e length (L) and width (W) of the patch. The different variants of back propagation training algorithm of MLFFBP-ANN (Multilayer feed forward back propagation Artificial Neural Network) and RBF –ANN (Radial basis function Artificial Neural Network) has been used to implement the network model. The results obtained from artificial neural network when compared with simulation results, found satisfactory and also it is concluded that RBF network is more accurate and fast as compared to different variants of back propagation training algorithms of MLPFFBP. The ANNs results are more in agreement with the simulation findings. Neural network based estimation has the usual advantage of very fast and simultaneous response of all the outputs. 展开更多
关键词 microstrip ANTENNA BANDWIDTH Simulation Modelling NEURAL Networks CAD
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On the Design of Slot Cut Circularly Polarized Circular Microstrip Antennas
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作者 Amit A. Deshmukh Saleha A. Shaikh +2 位作者 Ami A. Desai Kshitij A. Lele Sudesh Agrawal 《Wireless Engineering and Technology》 2016年第1期46-57,共12页
Circularly polarized microstrip antenna is frequently realized by cutting the slot inside the patch and feeding it along the diagonal axis. In the reported literature, procedure to design them at any given frequency i... Circularly polarized microstrip antenna is frequently realized by cutting the slot inside the patch and feeding it along the diagonal axis. In the reported literature, procedure to design them at any given frequency is not available. In proposed work, circularly polarized slot cut circular microstrip antenna at 900 MHz is discussed. By studying the surface current distributions at two orthogonal modes, formulations in their resonant length are proposed. The frequencies calculated using them closely agree with simulated results. Using proposed formulation, procedure to design circular polarized antennas at different frequencies is presented that gives circular polarized response. Thus, proposed work will be helpful to design similar circular polarized circular microstrip antenna at any desired frequency. 展开更多
关键词 Circular microstrip Antenna Circular Polarization Rectangular Slot Resonant Length Formulation
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Hankel Transform Domain Analysis of Dual-Frequency Stacked Circular Microstrip Antennas
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作者 Huang Jingxi Fan Zhibo 《Wuhan University Journal of Natural Sciences》 CAS 1997年第4期61-65,共5页
This paper presents an accurate and efficient method for the computation of resonant frequencies and radiation patterns of a dual frequency stacked circular microstrip antenna.The problem is first formulated using th... This paper presents an accurate and efficient method for the computation of resonant frequencies and radiation patterns of a dual frequency stacked circular microstrip antenna.The problem is first formulated using the Hankel transform domain approach and expressions are obtained for the Green's function in the Hankel transform domain,which relates the electric surface currents on the circular disks and tangential electric field components on the surfaces of the substrates. Then Galerkin's method together with Parsebal's relation for Hankel transformation is used to solve for the unknown currents, In the derivation process,the resonant frequencies are numerically determined as a function of the radii of two circular disks and thicknesses and relative permittivies of two substrates.Finally,the far zone radiation patterns are directly obtained from the Green's function and the currents. The numerical results for the resonant frequencies and radiation patterns are in excellent agreement with the available experimental data corroborating the accuracy of the present method. 展开更多
关键词 microstrip antennas circular microstrip antennas Hankel transform Garlerkin′s method
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Metamaterials and metasurfaces for designing metadevices:Perfect absorbers and microstrip patch antennas 被引量:2
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作者 Yahong Liu Xiaopeng Zhao 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第11期235-249,共15页
In the past twenty years, electromagnetic metamaterials represented by left-handed metamaterials(LHMs) have attracted considerable attention due to the unique properties such as negative refraction, perfect lens, an... In the past twenty years, electromagnetic metamaterials represented by left-handed metamaterials(LHMs) have attracted considerable attention due to the unique properties such as negative refraction, perfect lens, and electromagnetic cloaks. In this paper, we present a comprehensive review of our group's work on metamaterials and metasurfaces. We present several types of LHMs and chiral metamaterials. As a two-dimensional equivalent of bulk three-dimensional metamaterials, metasurfaces have led to a myriad of devices due to the advantages of lower profile, lower losses, and simpler to fabricate than bulk three-dimensional metamaterials. We demonstrate the novel microwave metadevices based on metamaterials and metasurfaces: perfect absorbers and microwave patch antennas, including novel transmission line antennas,high gain resonant cavity antennas, wide scanning phased array antennas, and circularly polarized antennas. 展开更多
关键词 left-handed metamaterials chiral metamaterials metasurfaces perfect absorbers microstrip patch antennas
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Broadband printed antennas and dual-polarized microstrip and waveguide slot antenna arrays 被引量:1
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作者 汪伟 《Journal of Shanghai University(English Edition)》 CAS 2006年第3期282-282,共1页
In order to meet the urgent needs in wireless communications, microwave image synthetic aperture radars (SAR), and electronic warfare systems, this dissertation studies several types of broadband dual-polarized plan... In order to meet the urgent needs in wireless communications, microwave image synthetic aperture radars (SAR), and electronic warfare systems, this dissertation studies several types of broadband dual-polarized planar antenna elements and arrays, and proposes a few of novel designs with experimental verification. The main accomplishments reported in the dissertation are as follows. 展开更多
关键词 BROADBAND DUAL-POLARIZATION MONOPOLE microstrip antenna waveguide slot antenna synthetic aperture radar(SAR).
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Different Feeding Techniques of Microstrip Patch Antennas with Spiral Defected Ground Structure for Size Reduction and Ultra-Wide Band Operation 被引量:1
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作者 Dalia M. Elsheakh Esmat A. Abdallah 《Journal of Electromagnetic Analysis and Applications》 2012年第10期410-418,共9页
Different feeding techniques of microstrip patch antennas with different spiral defected ground structures are presented in this paper. The investigated structures illustrate some merits in designing multi-electromagn... Different feeding techniques of microstrip patch antennas with different spiral defected ground structures are presented in this paper. The investigated structures illustrate some merits in designing multi-electromagnetic band-gap structures by adjusting the capacitance and changing the inductance through varying the width and length of spiral defected ground structure. Then by applying the three different spirals shapes (one, two and four arms) as the ground plane of microstrip patch antenna with different feeding techniques to create multi or ultra wide-band, improve the antenna gain and reduce the antenna size, it is found that the four arms spiral defected ground structure of microstrip patch antenna with offset feed gives good performance, electrical size reduction to about 75% as compared to the original patch size and ultra-wide bandwidth extends from 2 GHz up to 12 GHz with ?8 dB impedance bandwidth. 展开更多
关键词 Electromagnetic Band-Gap (EBG) Defected Ground Structure (DGS) microstrip PATCH Antenna (MPA)
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Computation of Resonant Frequency of Gap-coupled Ring Microstrip Antennas
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作者 Pradeep Kumar 《International Journal of Automation and computing》 EI CSCD 2014年第6期671-675,共5页
In this paper, an analytical model for computing the resonant frequency of the gap-coupled ring microstrip patch antennas is developed. The analytical model is based upon the cavity model along with circuit theory. Us... In this paper, an analytical model for computing the resonant frequency of the gap-coupled ring microstrip patch antennas is developed. The analytical model is based upon the cavity model along with circuit theory. Using the field expressions and boundary conditions, the transcendental equation for the structure is developed. The analytically computed results are compared with the simulated results. The simulation work is carried out by using computer simulation technology(CST) microwave studio simulator.The comparison between simulated and computed results shows good agreement. 展开更多
关键词 Ring microstrip antenna gap-coupling resonant frequency analytic model parasitic element
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Novel Closed-Form Solution for Analyzing Mutual Coupling Between Cylindrical Comformal Rectangular Microstrip Patch Antennas
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作者 何芒 徐晓文 《Journal of Beijing Institute of Technology》 EI CAS 2003年第2期129-133,共5页
Based on the integral equation formulations and the moment method, a novel closed form solution for analyzing the mutual coupling effect between the cylindrical comformal rectangular microstrip patch antennas is pres... Based on the integral equation formulations and the moment method, a novel closed form solution for analyzing the mutual coupling effect between the cylindrical comformal rectangular microstrip patch antennas is presented. By using this algorithm, the elements of the impedance matrix and exciting vector are cast into closed forms, thus the computational efficiency is improved dramatically. Numerical results are presented to verify the validity and reliability of the algorithm. 展开更多
关键词 conformal microstrip antenna mutual coupling moment method closed form solution
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A BROADBAND FEEDING TECHNIQUE FOR MICROSTRIP PATCH ANTENNAS
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作者 钟顺时 《Journal of Electronics(China)》 1989年第3期251-262,共12页
In order to broaden the bandwidth of a microstrip patch antenna,a broadbandtwo-port feedingtechnique based on the principle of reactance compensation is suggested.The principle and some designguidelines are presented;... In order to broaden the bandwidth of a microstrip patch antenna,a broadbandtwo-port feedingtechnique based on the principle of reactance compensation is suggested.The principle and some designguidelines are presented;the calculating model of a practical configuration as well as its parameteroptimization is demonstrated,followed by several kinds of test models With their experimental results.It isshown that this technique enables the VSWR bandwidth to be broadened to 2—3 or more times that of aconventional design for both linear and circular polarization operation. 展开更多
关键词 ANTENNA microstrip ANTENNA BROADBAND TECHNIQUE
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Characteristic-Based Time Domain Method for Cylindrically Conformal Microstrip Patch Antennas
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作者 徐晓文 辛莉 《Journal of Beijing Institute of Technology》 EI CAS 2005年第4期386-390,共5页
The characteristics of a cylindrical conformal microstrip patch antenna are analyzed by using the characteristic-based time domain (CBTD) method. A governing equation in the cylindrical coordinate system is formulat... The characteristics of a cylindrical conformal microstrip patch antenna are analyzed by using the characteristic-based time domain (CBTD) method. A governing equation in the cylindrical coordinate system is formulated directly to facilitate the analysis of cylindrically conformal microstrip patch antennas. The algorithm has second-order accuracy both in time and space domain and has the potential to eliminate the spurious wave reflection from the numerical boundaries of the computational domain, Numerical results demonstrate the important merits and accuracy of the proposed technique in computational electromagnetics, 展开更多
关键词 characteristic-based time domain (CBTD) method conformal microstrip antenna DIAGONALIZATION flux splitting finite-difference time domain (FDTD) method
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A Linear Array Antenna of Microstrip Patch Antennas Fed by the Open-End of Coplanar Waveguides
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作者 Toshihisa Kamei Hiromi Shima +1 位作者 Syotaro Fukuda Seishiro Ishii 《Wireless Engineering and Technology》 2017年第2期37-49,共13页
In this study, we constructed a 4-element linear array antenna using four 20 GHz band microstrip patch antennas with a structure such that the signal is fed to the patch antennas from open-end coplanar waveguides with... In this study, we constructed a 4-element linear array antenna using four 20 GHz band microstrip patch antennas with a structure such that the signal is fed to the patch antennas from open-end coplanar waveguides without contact. We investigated factors related to the design of linear array patch antennas. To adjust the maximum radiation direction and reduce return loss, we optimized the spacing between the elements and their shape. With an element spacing of 11.50 mm, patch width of 3.90 mm, and patch length of 4.15 mm, we obtained a resonance frequency of 20.05 GHz and a return loss of -29.59 dB at the resonance frequency. However, in the case of a 4-element linear array antenna structure, undesired resonances occurred in frequency bands other than the design resonance frequency band of 20 GHz. To suppress these undesired resonances and obtaining stable operation at the design frequency, we propose a new structure in which the feed line is loaded with a short stub, and show through computer simulations that the occurrence of undesired resonances can be sufficiently suppressed. Furthermore, we demonstrate the problem of radiation gain reduction caused by introducing a short stub, propose a design method for a new structure in which the feed line has slits between the stubs, and show improvement of the antenna gain by 0.5 dBi. 展开更多
关键词 microstrip PATCH ANTENNA COPLANAR Waveguide Linear Array ANTENNA Short STUB Undesired Resonance Suppression
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Numerical Computation of Resonant Frequency of Shorting Post Loaded Gap-Coupled Circular Microstrip Patch Antennas
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作者 Pradeep KUMAR G. SINGH T. CHAKRAVARTY 《Journal of Electromagnetic Analysis and Applications》 2009年第4期259-264,共6页
In this paper, the numerical computation of resonant frequency of the two gap-coupled circular microstrip patch antenna loaded with shorting post by using cavity model is presented. The numerically computed results ar... In this paper, the numerical computation of resonant frequency of the two gap-coupled circular microstrip patch antenna loaded with shorting post by using cavity model is presented. The numerically computed results are compared with simulated results. The two gap-coupled circular microstrip patch antenna loaded with shorting post miniaturize the cross-sectional dimension of the radiating patch at the microwave frequency, which is useful for short range communications or contactless identification systems. The simulation has been performed using method-of-moments based commercially available simulator IE3D. 展开更多
关键词 Gap-Coupling microstrip antennas Shorting POST RESONANT Frequency
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A Simplified Full-Wave Analysis for Microstrip Patch Antennas
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作者 Ghulam Qasim Mehboob-ur-Rehman A. Kareem 《Advances in Manufacturing》 2000年第1期27-30,共4页
The spectral domain integral equation(SDIE) provides an accurate and efficient method for computing the resonant frequency, radiation patterns, etc . Using continuous Fourier transform, the formulation utilizes the... The spectral domain integral equation(SDIE) provides an accurate and efficient method for computing the resonant frequency, radiation patterns, etc . Using continuous Fourier transform, the formulation utilizes the singular integral equations via the Glerkin's method to derive the deterministic equation with fewer mathematical manipulations. In contrast, discrete Fourier transform(DFT) requires intricate mathematical labor. The present scheme requires a small size, i.e ., (2×2) matrix, and it is possible to extract higher order modal solutions conveniently. Moreover, computation is reduced with the same convergence properties. Based on the present scheme, some results for resonant frequency and radiation patterns compared with available data and computed current distribution on the patch are presented. 展开更多
关键词 microstrip patch antenna full-wave analysis spectral domain integral equation
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Design and Development of a 2 ×1 Array of Slotted Microstrip Line Fed Shorted Patch Antenna for DCS Mobile Communication System
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作者 G. A. Bidkar R. M. Vani P. V. Hungund 《Wireless Engineering and Technology》 2013年第1期59-63,共5页
Compact microstrip antennas have recently received much attention due to the increasing demand of small antennas for personal communication equipment. The problem of achieving a wide impedance bandwidth for compact mi... Compact microstrip antennas have recently received much attention due to the increasing demand of small antennas for personal communication equipment. The problem of achieving a wide impedance bandwidth for compact microstrip antennas is becoming an important topic in microstrip antenna design. In this paper the design and development of a 2 × 1 array of a low cost slotted microstrip line fed shorted patch antenna (MFSPA) has been presented. Both the shorted patch and microstrip line feed network have air substrate. The material cost is thus reduced to a minimum. The array consists of two adjacent patches fed, using a simple microstrip T network. The impedance bandwidth of nearly 40%, covering the bandwidth requirement of 1750 MHz band is obtained. Also the antenna exhibits dual band operation. The cross polarization radiation in H-Plane observed with a single element antenna has been reduced considerably with 2 × 1 array. A peak antenna gain of 9.2 dBi is obtained with a small variation of 0.8 dBi. From the results obtained it is clear that the antenna array studied has a low cost fabrication and is suitable for applications in DCS mobile communication base station. 展开更多
关键词 microstrip ANTENNA COMPACT ANTENNA Shorted PATCH microstrip Line FED
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Design of the small microstrip antenna based on the WLAN/UWB wireless communication system
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作者 QIU Jiangyun 《International English Education Research》 2019年第2期15-17,共3页
The antenna,as the component of receiving and sending signals in the front end of the wireless communication system,plays an important role in the communication quality,and is often the main obstacle to the developmen... The antenna,as the component of receiving and sending signals in the front end of the wireless communication system,plays an important role in the communication quality,and is often the main obstacle to the development of the miniaturization of the wireless communication system.The microstrip antenna is composed of a metal radiation patch which can be pasted on the dielectric substrate.The choice of the shape of the metal patch can be arbitrary.The conventional shape is usually chosen as the metal patch to simplify the analysis and prediction of its performance.The dielectric constant of the microstrip antenna substrate is relatively low in order to enhance the field intensity of the edge radiation field.However,the dielectric constant of the substrate needs to be greater than 5 in order to meet the needs of other performance of the microstrip antenna,so that the radiation edge effect cannot be enhanced,resulting in the greater contradictions. 展开更多
关键词 WLAN TECHNOLOGY UWB TECHNOLOGY wireless communication system SMALL microstrip antenna DESIGN
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