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Bandwidth improvement of parasitic coupled patch antenna with Genetic Algorithm 用遗传算法改进寄生耦合贴片天线的带宽
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852153
A. Sabouni, M. S. Abrishamian, S. Noghanian, M. M. Zahedi
{"title":"Bandwidth improvement of parasitic coupled patch antenna with Genetic Algorithm","authors":"A. Sabouni, M. S. Abrishamian, S. Noghanian, M. M. Zahedi","doi":"10.1109/ANTEM.2005.7852153","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852153","url":null,"abstract":"Patch antennas with parasitic subarrays are used to improve the bandwidth of the patch antennas. Parasitic subarrays are coupled to radiating edges, nonradiating edges or all four edges of the patch. These subarrays create new resonance frequencies which interfere with the main resonance frequency and improve the bandwidth. Gupta et al. [1] used segmentation method to optimize the gap dimensions and parasitic patch dimensions to obtain bandwidth as large as 10%. In this paper we set gap coupling and parasitic dimensions fixed and use genetic algorithm combined with FDD method for simulation and optimization of the problem. Our goal is to increase return loss bandwidth. Genetic Algorithm (GA) is performed on the parasitic subarrays with no change on the main patch. At each iteration of GA we remove some defined cells form the parasitic patches and simulate the structure to monitor bandwidth width enhancement, Such iteration is performed several times to obtain good bandwidth. Main patch is designed at 9 GHz, and parasitic patches have the same dimension as the main patch. Primary simulations have shown bandwidth improvement more than 10%.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125580822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Replicating sensor for transient antenna measurements 用于瞬态天线测量的复制传感器
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852190
A. Yarovoy
{"title":"Replicating sensor for transient antenna measurements","authors":"A. Yarovoy","doi":"10.1109/ANTEM.2005.7852190","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852190","url":null,"abstract":"Application of the shielded loop antenna as a replicating sensor for transient antenna measurements is discussed. Different sensor designs, measurements schemes and calibration curves are presented. It is shown that the shielded loop antenna is a simple (both in development and application) and reliable ultra-wideband sensor for antenna measurements, in particularly in the near field.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126807354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A new approach to enhance the bandwidth of a novel miniaturized fractal microstrip patch antenna 一种提高新型微型化分形微带贴片天线带宽的新方法
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852094
M. Jamshidifar, F. Arazm, C. Ghobadi, J. Nourinia
{"title":"A new approach to enhance the bandwidth of a novel miniaturized fractal microstrip patch antenna","authors":"M. Jamshidifar, F. Arazm, C. Ghobadi, J. Nourinia","doi":"10.1109/ANTEM.2005.7852094","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852094","url":null,"abstract":"A novel fractal shape is introduced as a miniaturized microstrip patch antenna. Also by applying a new feeding method, wide impedance bandwidth is achieved. Measured and simulated results are in good agreement and show 68% size reduction (compare to a square patch) and up to 27% impedance bandwidth.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128106692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
60 GHz electromagnetic fields do not activate stress-sensitive gene expression 60 GHz的电磁场不会激活应激敏感基因的表达
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852193
M. Zhadobov, R. Sauleau, L. Le Coq, D. Thouroude, I. Orlov, D. Michel, Y. Le Dréan
{"title":"60 GHz electromagnetic fields do not activate stress-sensitive gene expression","authors":"M. Zhadobov, R. Sauleau, L. Le Coq, D. Thouroude, I. Orlov, D. Michel, Y. Le Dréan","doi":"10.1109/ANTEM.2005.7852193","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852193","url":null,"abstract":"The purpose of this study was to determine whether millimeter waves exposure at 60GHz, upcoming to use for indoor high rate communications in local area networks, could lead to a stress response in human brain cells. U-251 MG cell line was sham-exposed or exposed to low power density millimeter radiation for different duration, from 1h to 33h. Using the transfection technique, we analyzed the gene expression for reporter genes previously shown highly sensitive to many environmental insults. We have tested the influence of 60GHz radiations on 3 different gene expression systems, overlaying the main cellular response pathways to physical and chemical stresses. No statistically significant difference was detected in transcriptional activity of reporter genes after radiation exposure. These results suggest that radiation in the frequency range around 60GHz is not a stressor strong enough to modify the stress-sensitive gene expression.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126673398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Effects of the transmission channel on the LS-CMA based beamformer in mobile communications 移动通信中传输信道对基于LS-CMA的波束形成器的影响
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852031
B. Banitalebi, M. Kamarei, M. Karimi, G. Dadashzadeh
{"title":"Effects of the transmission channel on the LS-CMA based beamformer in mobile communications","authors":"B. Banitalebi, M. Kamarei, M. Karimi, G. Dadashzadeh","doi":"10.1109/ANTEM.2005.7852031","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852031","url":null,"abstract":"In mobile communications, transmission channel causes significant effects on the signal of mobile users received by the BTS. These changes can degrade the performance of the beamformer. In this paper, undesired effects of the transmission channel on the performance of the LS-CMA based beamformer are investigated both theoretically and through simulations. Investigations of this paper show that the effect of transmission channel on the beamformer performance depends on some parameters such as modulation technique used in the transmitter, mobile environment, and etc. But in general, phase error and angular spread have the worst effect on the beamformer performance.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121832939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
MDS in the analysis of pre-fractal printed strip gratings MDS在预分形印刷条形光栅分析中的应用
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852022
A. Antonets
{"title":"MDS in the analysis of pre-fractal printed strip gratings","authors":"A. Antonets","doi":"10.1109/ANTEM.2005.7852022","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852022","url":null,"abstract":"In this paper, we present new method for the modeling of printed strip gratings. Our general approach for finite perfectly electric conducting (PEC) strip gratings printed on a dielectric substrate with a PEC ground plane is based on the parametric representations of the integral and pseudo-differential operators and Method of Discrete Singularities (MDS). Diffraction problem is first reduced to hypersingular integral equation. Then this equation is solved using the MDS. Finite-order Cantorian set strip grating is investigated numerically. Some of obtained results are presented.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122787395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a dual band circularly-polarized offset feed microstrip reflectarray 双频圆偏振偏置馈电微带反射镜的研制
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852047
M. R. Chaharmir, J. Shaker, M. Cuhaci
{"title":"Development of a dual band circularly-polarized offset feed microstrip reflectarray","authors":"M. R. Chaharmir, J. Shaker, M. Cuhaci","doi":"10.1109/ANTEM.2005.7852047","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852047","url":null,"abstract":"The design procedure and experimental results are presented for a high-gain, dual-band, circularly-polarized (CP) reflectarray antenna with an offset feed, operating at the Ku/Ka-band (Tx=30 GHz, Rx=20 GHz). The performance of this offset reflectarray antenna is compared with other CP reflectarray antennas designed by the authors of this paper. A transmit band gain of 38 dBic and a receive band gain of 36 dBic both with an axial ratio of less than 3 dB were measured for this antenna.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121741279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Design of 2.45 GHz -antennas for RFID applications 用于RFID应用的2.45 GHz天线设计
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852033
D. Bechevet, T. Vuong, S. Tedjini
{"title":"Design of 2.45 GHz -antennas for RFID applications","authors":"D. Bechevet, T. Vuong, S. Tedjini","doi":"10.1109/ANTEM.2005.7852033","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852033","url":null,"abstract":"Radio Frequency Identification (RFID) is one of most efficient way for traceability. This last one is compulsory for several applications such as domestical animals or advised in other cases for furnitures tracking for instance. Many standards with different frequencies already exist. Our interest lies on solutions at 2.45GHz [1,2], in particular on low-cost antennas and RFID-chip adaptation on it.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122112838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Novel wide-band half hemispherical dielectric resonator antenna 新型宽带半半球形介质谐振器天线
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852085
D. Guha, Y. Antar
{"title":"Novel wide-band half hemispherical dielectric resonator antenna","authors":"D. Guha, Y. Antar","doi":"10.1109/ANTEM.2005.7852085","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852085","url":null,"abstract":"A symmetrically half section of a hemispherical dielectric resonator antenna (DRA) has been studied and proposed as a novel broadband antenna. The input return loss characteristics, associated resonant modes and their field patterns and the radiation characteristics over the operating band of a probe-fed DRA have been investigated using Ansoft HFSS solver. Suitable radiation patterns with nearly 40% bandwidth (S11<−10dB) have been obtained from a single element low profile DRA structure.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123219188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Automatization of short-circuited line method for dielectric characterization using a network analizer 用网络分析仪实现电介质表征短路线法的自动化
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852078
C. Garrido, T. P. Iglesias
{"title":"Automatization of short-circuited line method for dielectric characterization using a network analizer","authors":"C. Garrido, T. P. Iglesias","doi":"10.1109/ANTEM.2005.7852078","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852078","url":null,"abstract":"The short-circuited line method or Roberts-Von Hipple's method for dielectric characterization is usually not found on the bibliography, maybe due to its implementation requires the resolution of a transcendental equation on the complex plane that yields infinite solutions being then necessary to suppress the ambiguity. In this paper, this technique is automated using a vectorial network analyzer HP8719D. The data have been acquired through an interface HP-IB and their treatment and representation has been carried out using HTBasic.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124624139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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