Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1711385
P. Kajenski
Particle swarm optimization is a stochastic evolutionary computation technique that emulates the behavior of swarms. The algorithm was used to optimize the design of reduced-size meandered line and end-loaded dipoles. The performance characteristics of both styles of antenna, optimized to the same criteria, are compared
{"title":"Particle Swarm Optimization of Reduced-size HF Dipoles","authors":"P. Kajenski","doi":"10.1109/APS.2006.1711385","DOIUrl":"https://doi.org/10.1109/APS.2006.1711385","url":null,"abstract":"Particle swarm optimization is a stochastic evolutionary computation technique that emulates the behavior of swarms. The algorithm was used to optimize the design of reduced-size meandered line and end-loaded dipoles. The performance characteristics of both styles of antenna, optimized to the same criteria, are compared","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85077362","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}
Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1711240
A. Pirhadi, F. Keshmiri, M. Hakkak
In this paper, we present a novel design of a dual-band high directive EBG resonator antenna that utilizes a single layer frequency selective surfaces (FSS) as a superstrate. In this study we use a special configuration of square loop-array to design the FSS superstrate layer. We obtain the different operating frequencies by adjusting the distance of FSS from printed patch antenna and also the perimeter of square loops. The proposed structure presents more than 18 dBi directivity enhancement at 11.25 GHz and 13.15 GHz as compared to those of a patch antenna with 6 dBi directivity
{"title":"Design of dual-band low profile high directive EBG resonator antenna, using single layer frequency selective surface (FSS) superstrate","authors":"A. Pirhadi, F. Keshmiri, M. Hakkak","doi":"10.1109/APS.2006.1711240","DOIUrl":"https://doi.org/10.1109/APS.2006.1711240","url":null,"abstract":"In this paper, we present a novel design of a dual-band high directive EBG resonator antenna that utilizes a single layer frequency selective surfaces (FSS) as a superstrate. In this study we use a special configuration of square loop-array to design the FSS superstrate layer. We obtain the different operating frequencies by adjusting the distance of FSS from printed patch antenna and also the perimeter of square loops. The proposed structure presents more than 18 dBi directivity enhancement at 11.25 GHz and 13.15 GHz as compared to those of a patch antenna with 6 dBi directivity","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85879138","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}
Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1711310
J. Chauveau, N. de Beaucoudrey, J. Saillard
This paper proposes to characterize the resonance behavior of targets with the quality factor, defined by comparison with resonant circuits. Results are presented exhibiting the advantage of using this Q parameter
{"title":"Study of resonances of scattering objects: comparison with resonant circuits and characterization using Q-factor","authors":"J. Chauveau, N. de Beaucoudrey, J. Saillard","doi":"10.1109/APS.2006.1711310","DOIUrl":"https://doi.org/10.1109/APS.2006.1711310","url":null,"abstract":"This paper proposes to characterize the resonance behavior of targets with the quality factor, defined by comparison with resonant circuits. Results are presented exhibiting the advantage of using this Q parameter","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80880778","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}
A rigorous finite-difference time-domain (FDTD) modeling method has been presented to analyze the Gunn diodes covering three grid cells in the axial direction. The numerical results of an active antenna are near to the measured results and better than the computed ones in previous studies. This approach is convenient to study millimeter and sub-millimeter wave circuits with nonlinear lumped elements. According to the practical grid structures, the iterated field equations group of the diodes occupying two, four or more grid cells can be achieved easily
{"title":"Rigorous Analysis of the Active Antennas using FDTD","authors":"Xue-xia Yang, Peng Cai, Wenhui Shen, Wen-jun Zhang","doi":"10.1109/APS.2006.1711467","DOIUrl":"https://doi.org/10.1109/APS.2006.1711467","url":null,"abstract":"A rigorous finite-difference time-domain (FDTD) modeling method has been presented to analyze the Gunn diodes covering three grid cells in the axial direction. The numerical results of an active antenna are near to the measured results and better than the computed ones in previous studies. This approach is convenient to study millimeter and sub-millimeter wave circuits with nonlinear lumped elements. According to the practical grid structures, the iterated field equations group of the diodes occupying two, four or more grid cells can be achieved easily","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73602187","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}
Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1710527
K. Gosalia, R. Hoferer, S. Patel, M. Beadle
In satellite earth station antenna systems there is an increasing demand for complex single aperture, multi-function and multi-frequency band capable feed systems. In this work, a multi band feed system (6/12 GHz) is described which employs quadrature junctions (QJ) and supports transmit and receive functionality in the C and Ku bands respectively. This feed system is designed for a 16.4 m diameter shaped cassegrain antenna. It is a single aperture, 4 port system with transmit capability in circular polarization (CP) mode over the 6.625-6.69 GHz band and receive in the linear polarization (LP) mode over the 12.1-12.3 GHz band
{"title":"A dual band (C/Ku) feed system with transmit and receive capability","authors":"K. Gosalia, R. Hoferer, S. Patel, M. Beadle","doi":"10.1109/APS.2006.1710527","DOIUrl":"https://doi.org/10.1109/APS.2006.1710527","url":null,"abstract":"In satellite earth station antenna systems there is an increasing demand for complex single aperture, multi-function and multi-frequency band capable feed systems. In this work, a multi band feed system (6/12 GHz) is described which employs quadrature junctions (QJ) and supports transmit and receive functionality in the C and Ku bands respectively. This feed system is designed for a 16.4 m diameter shaped cassegrain antenna. It is a single aperture, 4 port system with transmit capability in circular polarization (CP) mode over the 6.625-6.69 GHz band and receive in the linear polarization (LP) mode over the 12.1-12.3 GHz band","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85392038","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}
Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1711041
G. Yu, T. Cui
In this work, we first focus our attention to the physical properties of electromagnetic (EM) wave excited by a 3D horizontal electric dipoles (HED) in the lossy and mismatched left-handed material (LHM). Then we study the EM wave and energy localization using the lossy LHM slab lens
{"title":"Interactions of Left-Handed Medium Slab with Three-Dimensional Horizontal Electric Dipoles","authors":"G. Yu, T. Cui","doi":"10.1109/APS.2006.1711041","DOIUrl":"https://doi.org/10.1109/APS.2006.1711041","url":null,"abstract":"In this work, we first focus our attention to the physical properties of electromagnetic (EM) wave excited by a 3D horizontal electric dipoles (HED) in the lossy and mismatched left-handed material (LHM). Then we study the EM wave and energy localization using the lossy LHM slab lens","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85558244","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}
Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1711273
M. Abbas-Azimi, F. Arazm, J. Rashed‐Mohassel
In this paper some properties of a 1-18 GHz double ridged guide horn antenna (DRGH) with a feeding section including coaxial input and a back shorting plate are rigorously investigated. Most desired electromagnetic characteristics of this antenna is achieved by empirically finding sizes for different parameters, however there is no explanation for the effect of most of them in open literature. In order to have a clear idea of the effects of different parameters, a 1-18 GHz DRGH has been simulated with HFSS. It is understood from the results that the parameters near feeding point such as the initial distance between ridges, the distance between the center of the probe and the cavity, and the radius of the inserted probe play a significant role in controlling VSWR and gain and in shaping the radiation pattern for high frequencies
{"title":"Sensitivity analysis of a 1 to 18 GHz broadband DRGH antenna","authors":"M. Abbas-Azimi, F. Arazm, J. Rashed‐Mohassel","doi":"10.1109/APS.2006.1711273","DOIUrl":"https://doi.org/10.1109/APS.2006.1711273","url":null,"abstract":"In this paper some properties of a 1-18 GHz double ridged guide horn antenna (DRGH) with a feeding section including coaxial input and a back shorting plate are rigorously investigated. Most desired electromagnetic characteristics of this antenna is achieved by empirically finding sizes for different parameters, however there is no explanation for the effect of most of them in open literature. In order to have a clear idea of the effects of different parameters, a 1-18 GHz DRGH has been simulated with HFSS. It is understood from the results that the parameters near feeding point such as the initial distance between ridges, the distance between the center of the probe and the cavity, and the radius of the inserted probe play a significant role in controlling VSWR and gain and in shaping the radiation pattern for high frequencies","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85815409","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}
Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1710780
I. Jouny
This paper focuses on using blind source separation of complex signals to extract scattering centers of radar targets that can then be used for target identification. The concept introduced in this paper assumes that the signal returned (or scattered) from a target is linear or convolutive mixture of several scattering centers along the body of an unknown aircraft. This information can then be used in a pattern recognition scheme for the purpose of identifying the non-cooperative unknown target. The results presented prove the concept using synthetic radar data. Work is ongoing to apply this concept to real radar data as received through an array of sensors (antennas)
{"title":"Blind source separation for extraction of target scattering centers","authors":"I. Jouny","doi":"10.1109/APS.2006.1710780","DOIUrl":"https://doi.org/10.1109/APS.2006.1710780","url":null,"abstract":"This paper focuses on using blind source separation of complex signals to extract scattering centers of radar targets that can then be used for target identification. The concept introduced in this paper assumes that the signal returned (or scattered) from a target is linear or convolutive mixture of several scattering centers along the body of an unknown aircraft. This information can then be used in a pattern recognition scheme for the purpose of identifying the non-cooperative unknown target. The results presented prove the concept using synthetic radar data. Work is ongoing to apply this concept to real radar data as received through an array of sensors (antennas)","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84102619","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}
Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1710490
Chunna Zhang, Songnan Yang, H. Pan, A. Fathy, S. El-Ghazaly, V. Nair
An innovative reconfigurable nested patch antenna has been developed to cover the various GSM, GPS, DCS, PCS, Bluetooth and WLAN services. A 75% size reduction has been achieved using even and odd structure symmetry. Designs were first implemented using hard-wire connections and then MEMS switches. The developed design can be utilized as a part of a universal, multi-service, multi-band wireless receiver
{"title":"Development of reconfigurable mini-nested patches antenna for universal wireless receiver using MEMS","authors":"Chunna Zhang, Songnan Yang, H. Pan, A. Fathy, S. El-Ghazaly, V. Nair","doi":"10.1109/APS.2006.1710490","DOIUrl":"https://doi.org/10.1109/APS.2006.1710490","url":null,"abstract":"An innovative reconfigurable nested patch antenna has been developed to cover the various GSM, GPS, DCS, PCS, Bluetooth and WLAN services. A 75% size reduction has been achieved using even and odd structure symmetry. Designs were first implemented using hard-wire connections and then MEMS switches. The developed design can be utilized as a part of a universal, multi-service, multi-band wireless receiver","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84128014","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}
Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1710754
R. Silapunt, D. Torrungrueng
In this paper, analytical expressions of power-gains derived using two previously reported methods are compared. First approach involves the normalization of incident and reflected waves using conjugate characteristic impedances (CCI) of the line and the other involves the normalization using a characteristic conductance (CC) of the line. Then power-gains are numerically compared in a specified range of the argument Phi of the line characteristic impedance
{"title":"A comparison of two-port network analysis in a CCITL system","authors":"R. Silapunt, D. Torrungrueng","doi":"10.1109/APS.2006.1710754","DOIUrl":"https://doi.org/10.1109/APS.2006.1710754","url":null,"abstract":"In this paper, analytical expressions of power-gains derived using two previously reported methods are compared. First approach involves the normalization of incident and reflected waves using conjugate characteristic impedances (CCI) of the line and the other involves the normalization using a characteristic conductance (CC) of the line. Then power-gains are numerically compared in a specified range of the argument Phi of the line characteristic impedance","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78263751","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}
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