Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1710697
Yi‐Fang Lin, Chia-Ho Lin, Hua‐Ming Chen, J. Jan, Wen‐Shan Chen
In this paper, a new CPW-fed monopole antenna is demonstrated and loaded with a cylindrical ceramic dielectric piece. With this ceramic dielectric piece loaded on the radiator of the monopole, a dual-band operation is generated in a single antenna. The proposed antenna can easily be excited by a 50-Omega CPW line and a tuning metal strips etched on the back side of the dielectric piece, good impedance matching can be obtained for operating frequencies within both 2.4 and 5 GHz bands
{"title":"Design of ceramic chip antenna for 2.4/5 GHz WLAN applications","authors":"Yi‐Fang Lin, Chia-Ho Lin, Hua‐Ming Chen, J. Jan, Wen‐Shan Chen","doi":"10.1109/APS.2006.1710697","DOIUrl":"https://doi.org/10.1109/APS.2006.1710697","url":null,"abstract":"In this paper, a new CPW-fed monopole antenna is demonstrated and loaded with a cylindrical ceramic dielectric piece. With this ceramic dielectric piece loaded on the radiator of the monopole, a dual-band operation is generated in a single antenna. The proposed antenna can easily be excited by a 50-Omega CPW line and a tuning metal strips etched on the back side of the dielectric piece, good impedance matching can be obtained for operating frequencies within both 2.4 and 5 GHz bands","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"69 1","pages":"985-988"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75637472","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.2006.1711630
J. S. Petko, D. Werner
A multi-objective genetic algorithm optimization was applied to minimize the peak side-lobe levels of polyfractal arrays at several frequencies. These optimized polyfractal arrays are then individually examined and shown to possess low peak side-lobe levels over an ultra-wide range of frequencies. The mainbeam is steered away from broadside to show that even when steered, these arrays have extremely large bandwidths
{"title":"The Pareto Optimization of Ultra-Wideband Polyfractal Arrays","authors":"J. S. Petko, D. Werner","doi":"10.1109/APS.2006.1711630","DOIUrl":"https://doi.org/10.1109/APS.2006.1711630","url":null,"abstract":"A multi-objective genetic algorithm optimization was applied to minimize the peak side-lobe levels of polyfractal arrays at several frequencies. These optimized polyfractal arrays are then individually examined and shown to possess low peak side-lobe levels over an ultra-wide range of frequencies. The mainbeam is steered away from broadside to show that even when steered, these arrays have extremely large bandwidths","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"75 1","pages":"4479-4482"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74477762","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.2006.1711637
D. Psychoudakis, S. Koulouridis, J. Volakis
This paper presents several antenna designs based on magneto-dielectric and metallic antenna optimization. This is done using genetic algorithms (GA) and various designs are considered for a set of dielectric, magnetic and metallic choices. The optimized final designs include very thin, single layer textured dielectric (~0.01 lambda) substrates for circular polarized (CP) conformal antennas with as much as 15% bandwidth (BW) and sizes of the order of 0.1 lambda to 0.3 lambda (always thin ~0.01 lambda) exhibit remarkable gain or bandwidth behavior. Multiple designs are presented demonstrating the easiness and originality of the present approach
{"title":"Magneto-Dielectric Antenna Designs using Material and Metallic Genetic Algorithm Optimization","authors":"D. Psychoudakis, S. Koulouridis, J. Volakis","doi":"10.1109/APS.2006.1711637","DOIUrl":"https://doi.org/10.1109/APS.2006.1711637","url":null,"abstract":"This paper presents several antenna designs based on magneto-dielectric and metallic antenna optimization. This is done using genetic algorithms (GA) and various designs are considered for a set of dielectric, magnetic and metallic choices. The optimized final designs include very thin, single layer textured dielectric (~0.01 lambda) substrates for circular polarized (CP) conformal antennas with as much as 15% bandwidth (BW) and sizes of the order of 0.1 lambda to 0.3 lambda (always thin ~0.01 lambda) exhibit remarkable gain or bandwidth behavior. Multiple designs are presented demonstrating the easiness and originality of the present approach","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"54 1","pages":"4505-4508"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74690020","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.2006.1711030
S.-l.S. Yang, R. Chair, A. Kishk, K. Lee, K. Luk
In this paper we study the hybrid-ring feeding network, which has the advantages of linear phase difference across a wide impedance bandwidth. It is of practical interest to investigate the performance of hybrid ring feeding network in sequential feed circularly polarized dielectric resonator antenna (CP DRA) sub-array. In this paper, the performance of CP DRA sub-arrays excited by hybrid-ring feeding network is presented
{"title":"Circular Polarized Elliptical Dielectric Resonator Antenna Sub Array Fed by Hybrid-Ring Feeding Network","authors":"S.-l.S. Yang, R. Chair, A. Kishk, K. Lee, K. Luk","doi":"10.1109/APS.2006.1711030","DOIUrl":"https://doi.org/10.1109/APS.2006.1711030","url":null,"abstract":"In this paper we study the hybrid-ring feeding network, which has the advantages of linear phase difference across a wide impedance bandwidth. It is of practical interest to investigate the performance of hybrid ring feeding network in sequential feed circularly polarized dielectric resonator antenna (CP DRA) sub-array. In this paper, the performance of CP DRA sub-arrays excited by hybrid-ring feeding network is presented","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"23 1","pages":"2221-2224"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74736745","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.2006.1711164
Fan Yang, Ji Chen, R. Qiang, A. Elsherbeni
This paper presents a simple and efficient approach to implement the periodic boundary conditions (PBC) in the finite-difference time-domain (FDTD) method. The scattering property of periodic structures is computed in the kx-frequency plane through several rounds of FDTD simulations, each with a constant kx value. The accuracy of the method is demonstrated through a dipole frequency selective surface (FSS) example
{"title":"FDTD Analysis of Periodic Structures at Arbitrary Incidence Angles: A Simple and Efficient Implementation of the Periodic Boundary Conditions","authors":"Fan Yang, Ji Chen, R. Qiang, A. Elsherbeni","doi":"10.1109/APS.2006.1711164","DOIUrl":"https://doi.org/10.1109/APS.2006.1711164","url":null,"abstract":"This paper presents a simple and efficient approach to implement the periodic boundary conditions (PBC) in the finite-difference time-domain (FDTD) method. The scattering property of periodic structures is computed in the kx-frequency plane through several rounds of FDTD simulations, each with a constant kx value. The accuracy of the method is demonstrated through a dipole frequency selective surface (FSS) example","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"120 1","pages":"2715-2718"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74873449","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.2006.1710967
O. González, J. Pereda, A. Herrera, A. Grande, Á. Vegas
The two-port lumped-network FDTD (TP-LN-FDTD) method has been applied to modeling field effect transistors (FETs) with nonzero transconductance delay parameter. To this end, the exponential factor associated with phase delay in the current generator is approximated by a rational function. The validity of this approach has been demonstrated by computing the scattering parameters of a microwave heterojunction FET (HJ-FET) amplifier
将双端口集总网络FDTD (tp - nn -FDTD)方法应用于具有非零跨导延迟参数的场效应晶体管(fet)建模。为此，在电流发生器中与相位延迟相关的指数因子近似为有理函数。通过计算微波异质结场效应管(HJ-FET)放大器的散射参数，证明了该方法的有效性
{"title":"Applying the Two-Port Lumped-Network FDTD Method to Modeling Linear Field-Effect Transistors with Nonzero Transconductance Delay Parameter","authors":"O. González, J. Pereda, A. Herrera, A. Grande, Á. Vegas","doi":"10.1109/APS.2006.1710967","DOIUrl":"https://doi.org/10.1109/APS.2006.1710967","url":null,"abstract":"The two-port lumped-network FDTD (TP-LN-FDTD) method has been applied to modeling field effect transistors (FETs) with nonzero transconductance delay parameter. To this end, the exponential factor associated with phase delay in the current generator is approximated by a rational function. The validity of this approach has been demonstrated by computing the scattering parameters of a microwave heterojunction FET (HJ-FET) amplifier","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"31 1","pages":"1989-1992"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75603042","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.2006.1710486
X. Liang, L. Li, J. Bossard, D. Werner
A new design concept was presented for reconfigurable FSS that uses silicon as switches. Signals at frequencies around/above 100 GHz (D-band) are of interest for several applications including atmospheric sensing, wideband communications, automotive radar and test instrumentation. This paper presented two RFSS examples, one design with metallic patches and one with all dielectric materials at a target frequency of 100 GHz. The designs proposed in this paper are readily fabricated and can be easily scaled to lower or higher frequencies
{"title":"Reconfigurable frequency selective surfaces with silicon switches","authors":"X. Liang, L. Li, J. Bossard, D. Werner","doi":"10.1109/APS.2006.1710486","DOIUrl":"https://doi.org/10.1109/APS.2006.1710486","url":null,"abstract":"A new design concept was presented for reconfigurable FSS that uses silicon as switches. Signals at frequencies around/above 100 GHz (D-band) are of interest for several applications including atmospheric sensing, wideband communications, automotive radar and test instrumentation. This paper presented two RFSS examples, one design with metallic patches and one with all dielectric materials at a target frequency of 100 GHz. The designs proposed in this paper are readily fabricated and can be easily scaled to lower or higher frequencies","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"196 6","pages":"189-192"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72576063","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.2006.1711380
Zikri Bayraktar, P. Werner, D. Werner
This paper introduces a powerful technique that uses a hybrid PSO for the design optimization of aperiodic linear arrays of tightly packed miniature stochastic dipole elements. The self impedance of the stochastic dipole elements can be widely varied by changing their shape. A hybrid PSO is used to determine the optimal shape of each stochastic dipole array element as well as to perturb the spacing between these elements in order to control the mutual coupling. This method is capable of evolving compact array configurations with stochastic dipole elements that have well-behaved driving point impedances and low side lobe levels over a prescribed scan range. Orthogonal design with quantization (OD/Q) is used for this real-valued optimization problem to generate relatively fit particles at the initialization stage
{"title":"Miniaturization of Stochastic Linear Phased Arrays via Orthogonal Design Initialization and a Hybrid Particle Swarm Optimizer","authors":"Zikri Bayraktar, P. Werner, D. Werner","doi":"10.1109/APS.2006.1711380","DOIUrl":"https://doi.org/10.1109/APS.2006.1711380","url":null,"abstract":"This paper introduces a powerful technique that uses a hybrid PSO for the design optimization of aperiodic linear arrays of tightly packed miniature stochastic dipole elements. The self impedance of the stochastic dipole elements can be widely varied by changing their shape. A hybrid PSO is used to determine the optimal shape of each stochastic dipole array element as well as to perturb the spacing between these elements in order to control the mutual coupling. This method is capable of evolving compact array configurations with stochastic dipole elements that have well-behaved driving point impedances and low side lobe levels over a prescribed scan range. Orthogonal design with quantization (OD/Q) is used for this real-valued optimization problem to generate relatively fit particles at the initialization stage","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"41 2","pages":"3531-3534"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72588298","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.2006.1710569
G. Jandieri, N. Gomidze, V. Jandieri, I. Takidze, K. Yasumoto
At the present time the features peculiar to propagation and scattering of electromagnetic waves in random media have been rather well studied. In this paper we describe the features of statistical characteristics of the angular power spectrum of scattered radiation in turbulent collision magnetized plasma with both nonisotropic electron density and magnetic field fluctuations. Anisotropy of scattering is determined by both prolate degree on inhomogeneities and their orientation
{"title":"Statistical characteristics of the angular spectrum of scattered electromagnetic waves in nonisotropic turbulent collision magnetized plasma","authors":"G. Jandieri, N. Gomidze, V. Jandieri, I. Takidze, K. Yasumoto","doi":"10.1109/APS.2006.1710569","DOIUrl":"https://doi.org/10.1109/APS.2006.1710569","url":null,"abstract":"At the present time the features peculiar to propagation and scattering of electromagnetic waves in random media have been rather well studied. In this paper we describe the features of statistical characteristics of the angular power spectrum of scattered radiation in turbulent collision magnetized plasma with both nonisotropic electron density and magnetic field fluctuations. Anisotropy of scattering is determined by both prolate degree on inhomogeneities and their orientation","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"156 1","pages":"503-506"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74815797","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.2006.1710840
Wu Lei, Zhu Qi, Zhu Jianfang, Xu Shanjia
A novel dual-linearly-polarized microstrip antenna array with series fed configuration is presented. Dual-linear-polarization is excited by upper side-feeding and lower aperture-coupled feeding. Meanwhile, the series-feeding configuration is realized by a composite right/left-handed transmission line. Compared with the traditional design, this array is of simple structure, small area
{"title":"Design of dual-linearly-polarized microstrip array with composite right/left-handed transmission line as feed line","authors":"Wu Lei, Zhu Qi, Zhu Jianfang, Xu Shanjia","doi":"10.1109/APS.2006.1710840","DOIUrl":"https://doi.org/10.1109/APS.2006.1710840","url":null,"abstract":"A novel dual-linearly-polarized microstrip antenna array with series fed configuration is presented. Dual-linear-polarization is excited by upper side-feeding and lower aperture-coupled feeding. Meanwhile, the series-feeding configuration is realized by a composite right/left-handed transmission line. Compared with the traditional design, this array is of simple structure, small area","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"198 1","pages":"1511-1514"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78718833","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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