Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1710518
Yue Gao, Xiao Chen, C. Parini, Z. Ying
This paper investigates a dual-element modified planar inverted F antenna (PIFA) array mounted on the PCB of a mobile handset operating at around 2.45 GHz band. It not only retains the unique features of a conventional PIFA, but also offers low mutual coupling, low correlation coefficient and high diversity gain
{"title":"Study of a dual-element PIFA array for MIMO terminals","authors":"Yue Gao, Xiao Chen, C. Parini, Z. Ying","doi":"10.1109/APS.2006.1710518","DOIUrl":"https://doi.org/10.1109/APS.2006.1710518","url":null,"abstract":"This paper investigates a dual-element modified planar inverted F antenna (PIFA) array mounted on the PCB of a mobile handset operating at around 2.45 GHz band. It not only retains the unique features of a conventional PIFA, but also offers low mutual coupling, low correlation coefficient and high diversity gain","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"8 1","pages":"309-312"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78667120","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.2006.1710719
Lei Zhao, T. Cui
In this paper, we make use of the special physical characteristics of novel artificial left-handed materials (LHM) to realize the super resolution. One of the most attractive features of LHM is the amplification of evanescent waves. Using such a feature, it has been shown that strong surface waves can be excited near the boundaries of LHM slab with small loss. We investigate the possibility to enhance the resolution of dielectric objects using the LHM slab. The Born approximation has been used to solve the linearized inverse scattering problem. Numerical simulations show that better resolution can be achieved when the LHM slab is involved than those without the LHM slab. The study has demonstrated that the amplification of evanescent waves in the measurement data and inversion algorithm is the main reason for the super resolution
{"title":"Enhancement of resolution in electromagnetic imaging of lossy dielectric objects using a slab of left-handed material","authors":"Lei Zhao, T. Cui","doi":"10.1109/APS.2006.1710719","DOIUrl":"https://doi.org/10.1109/APS.2006.1710719","url":null,"abstract":"In this paper, we make use of the special physical characteristics of novel artificial left-handed materials (LHM) to realize the super resolution. One of the most attractive features of LHM is the amplification of evanescent waves. Using such a feature, it has been shown that strong surface waves can be excited near the boundaries of LHM slab with small loss. We investigate the possibility to enhance the resolution of dielectric objects using the LHM slab. The Born approximation has been used to solve the linearized inverse scattering problem. Numerical simulations show that better resolution can be achieved when the LHM slab is involved than those without the LHM slab. The study has demonstrated that the amplification of evanescent waves in the measurement data and inversion algorithm is the main reason for the super resolution","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"1069-1072"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76564719","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.2006.1711307
H. Lui, N. Shuley
In this paper, the problem of target identification with multiple data sets is investigated. A fixed incident aspect with multiple polarization angles is considered. Three different approaches of analyzing the multiple aspect information as used in the literature is discussed and exemplified using the scattering data from an L shaped wire target
{"title":"Resonance Based Radar Target Identification with Multiple Polarizations","authors":"H. Lui, N. Shuley","doi":"10.1109/APS.2006.1711307","DOIUrl":"https://doi.org/10.1109/APS.2006.1711307","url":null,"abstract":"In this paper, the problem of target identification with multiple data sets is investigated. A fixed incident aspect with multiple polarization angles is considered. Three different approaches of analyzing the multiple aspect information as used in the literature is discussed and exemplified using the scattering data from an L shaped wire target","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"38 1","pages":"3259-3262"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76220625","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.2006.1710783
Ick-Jae Yoon, Hyungrak Kim, Y. Yoon
This paper proposes a method of realizing band-notch characteristic in the UWB antenna and the low noise amplifier (LNA) such that the UWB RF receiver can fully suppress high-power interference signal in 5 GHz WLAN band. Two procedures of band-notching in RF signal reception are combined, and in fact, such a UWB RF receiver front-end has not been reported yet
{"title":"UWB RF receiver front-end with band-notch characteristic of 5 GHz WLAN","authors":"Ick-Jae Yoon, Hyungrak Kim, Y. Yoon","doi":"10.1109/APS.2006.1710783","DOIUrl":"https://doi.org/10.1109/APS.2006.1710783","url":null,"abstract":"This paper proposes a method of realizing band-notch characteristic in the UWB antenna and the low noise amplifier (LNA) such that the UWB RF receiver can fully suppress high-power interference signal in 5 GHz WLAN band. Two procedures of band-notching in RF signal reception are combined, and in fact, such a UWB RF receiver front-end has not been reported yet","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"45 1","pages":"1303-1306"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76245073","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.2006.1710954
M. Hosseini, A. Pirhadi, M. Hakkak
In this work, a basic cell shape (FSS shape) is first extracted from a 2D AMC structure designed by genetic algorithm (GA). The extracted FSS is a series-resonant grid (SRG) described analytically in C.R. Simovski et al., (2005). By applying the available analytical idea of C.R. Simovski et al. (2005), doing some parametric studies and using some innovation, a novel AMC with stable properties is obtained for wide range of incidence angles and with very compact size. During the process, one must be careful that the AMC bandwidth (BW) should not stray very much from acceptable limits. The FSS of the finalized AMC structure is a novel SRG that can be considered as a modified version of the well-known Jerusalem Cross (JC-FSS). For analysis of the structures, the Ansoff's Designer (AD) software, which is an electromagnetic solver based on the method of moments (MoM), is used
{"title":"Design of a novel AMC with little sensitivity to the angle of incidence and very compact size","authors":"M. Hosseini, A. Pirhadi, M. Hakkak","doi":"10.1109/APS.2006.1710954","DOIUrl":"https://doi.org/10.1109/APS.2006.1710954","url":null,"abstract":"In this work, a basic cell shape (FSS shape) is first extracted from a 2D AMC structure designed by genetic algorithm (GA). The extracted FSS is a series-resonant grid (SRG) described analytically in C.R. Simovski et al., (2005). By applying the available analytical idea of C.R. Simovski et al. (2005), doing some parametric studies and using some innovation, a novel AMC with stable properties is obtained for wide range of incidence angles and with very compact size. During the process, one must be careful that the AMC bandwidth (BW) should not stray very much from acceptable limits. The FSS of the finalized AMC structure is a novel SRG that can be considered as a modified version of the well-known Jerusalem Cross (JC-FSS). For analysis of the structures, the Ansoff's Designer (AD) software, which is an electromagnetic solver based on the method of moments (MoM), is used","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"29 1","pages":"1939-1942"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88030996","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.2006.1711317
D. Olćan, R. Golubovic, B. Kolundžija
This paper presents the results for three different antenna optimization problems that are found using the particle swarm optimizer (PSO). The outcomes found with PSO are compared to the outcomes found with other optimization algorithms to estimate the efficiency of PSO. The first problem is finding the optimal position of the feeding probe in a radiating rectangular waveguide. The second problem is finding the maximal forward gain of a Yagi antenna. The third problem is finding the optimal feeding of a broadside antenna array. The optimization problems have 2, 6, and 20 optimization variables respectively
{"title":"On the Efficiency of Particle Swarm Optimizer when Applied to Antenna Optimization","authors":"D. Olćan, R. Golubovic, B. Kolundžija","doi":"10.1109/APS.2006.1711317","DOIUrl":"https://doi.org/10.1109/APS.2006.1711317","url":null,"abstract":"This paper presents the results for three different antenna optimization problems that are found using the particle swarm optimizer (PSO). The outcomes found with PSO are compared to the outcomes found with other optimization algorithms to estimate the efficiency of PSO. The first problem is finding the optimal position of the feeding probe in a radiating rectangular waveguide. The second problem is finding the maximal forward gain of a Yagi antenna. The third problem is finding the optimal feeding of a broadside antenna array. The optimization problems have 2, 6, and 20 optimization variables respectively","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"22 1","pages":"3297-3300"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88069199","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.2006.1711409
Li-Ruei Kuo, Wen-Jiao Liao, H. Chou
In this work, an LNA module is moved into a corner-truncated patch antenna, which is intended for GPS reception use. A cavity is formed within the substrate of the patch to accommodate the LNA module. The built-in LNA enhances the antenna reception capability without adding external circuits. Hence, the resulting patch has the same footprint and thickness as ordinary passive patches. Simulations and measurements on prototype antenna indicate that the built-in LNA module imposes limiting influences on the antenna properties, which can be corrected by rescaling the patch, and is hence an attractive option for making small antennas with large gains
{"title":"An Active Patch Antenna with Embedded LNA Module","authors":"Li-Ruei Kuo, Wen-Jiao Liao, H. Chou","doi":"10.1109/APS.2006.1711409","DOIUrl":"https://doi.org/10.1109/APS.2006.1711409","url":null,"abstract":"In this work, an LNA module is moved into a corner-truncated patch antenna, which is intended for GPS reception use. A cavity is formed within the substrate of the patch to accommodate the LNA module. The built-in LNA enhances the antenna reception capability without adding external circuits. Hence, the resulting patch has the same footprint and thickness as ordinary passive patches. Simulations and measurements on prototype antenna indicate that the built-in LNA module imposes limiting influences on the antenna properties, which can be corrected by rescaling the patch, and is hence an attractive option for making small antennas with large gains","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"35 1","pages":"3639-3642"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88215943","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.2006.1710776
M. Leung, J. Leung, G. Baron, C. Sarris
The application of current implementations of electromagnetic simulators to realistic wireless communication problems requires excessively large computational time. As a result, computational electromagnetic tools have not been incorporated into the electromagnetics curricula yet. Building on a recent breakthrough in FDTD technology, we developed a novel simulation environment that enables the educational study of wave propagation in wireless links
{"title":"A fast time-domain wireless channel simulation tool for radio-wave propagation courses","authors":"M. Leung, J. Leung, G. Baron, C. Sarris","doi":"10.1109/APS.2006.1710776","DOIUrl":"https://doi.org/10.1109/APS.2006.1710776","url":null,"abstract":"The application of current implementations of electromagnetic simulators to realistic wireless communication problems requires excessively large computational time. As a result, computational electromagnetic tools have not been incorporated into the electromagnetics curricula yet. Building on a recent breakthrough in FDTD technology, we developed a novel simulation environment that enables the educational study of wave propagation in wireless links","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"1277-1280"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88363206","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.2006.1710731
Wei Huang, A. Kishk
In this paper, a wideband dielectric resonator antenna (DRA) sensor with small ground plane is designed for microwave breast cancer detection. A coaxial probe excites a two-steps stair shaped DRA. To reduce the backward leakage with the small ground plane size a quarter wavelength choke is added to the back of the ground plane. The impedance bandwidth of 46% is achieved. The effect of attaching the sensor to the breast tissue is investigated when the sensor is directly attached to the breast tissue
{"title":"Design of dielectric resonator sensor with minimized ground plane size for microwave breast cancer detection","authors":"Wei Huang, A. Kishk","doi":"10.1109/APS.2006.1710731","DOIUrl":"https://doi.org/10.1109/APS.2006.1710731","url":null,"abstract":"In this paper, a wideband dielectric resonator antenna (DRA) sensor with small ground plane is designed for microwave breast cancer detection. A coaxial probe excites a two-steps stair shaped DRA. To reduce the backward leakage with the small ground plane size a quarter wavelength choke is added to the back of the ground plane. The impedance bandwidth of 46% is achieved. The effect of attaching the sensor to the breast tissue is investigated when the sensor is directly attached to the breast tissue","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"74 1","pages":"1115-1118"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86169324","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.2006.1711654
A. Yamamoto, T. Sakata, H. Iwai, K. Ogawa, J. Takada, K. Sakaguchi, K. Araki
This paper presents an empirical study of the bit-error-rate (BER) performance of a handset adaptive antenna array in a Rayleigh-fading channel with a cross-polarized signal generated using a variable cross-polarization power ratio (XPR) spatial fading emulator. We have investigated the BER characteristics of a handset adaptive antenna consisting of a 1/4-wavelength monopole antenna and a planar inversed-F antenna (PIFA) as a function of XPR. It can be concluded that the measured average BER of an adaptive antenna array with both theta and phi components has an excellent BER performance in a multipath propagation environment with a cross-polarized component
{"title":"BER Measurement on a Handset Adaptive Antenna Array in a Rayleigh-Fading Channel by a Variable-XPR Spatial Fading Emulator","authors":"A. Yamamoto, T. Sakata, H. Iwai, K. Ogawa, J. Takada, K. Sakaguchi, K. Araki","doi":"10.1109/APS.2006.1711654","DOIUrl":"https://doi.org/10.1109/APS.2006.1711654","url":null,"abstract":"This paper presents an empirical study of the bit-error-rate (BER) performance of a handset adaptive antenna array in a Rayleigh-fading channel with a cross-polarized signal generated using a variable cross-polarization power ratio (XPR) spatial fading emulator. We have investigated the BER characteristics of a handset adaptive antenna consisting of a 1/4-wavelength monopole antenna and a planar inversed-F antenna (PIFA) as a function of XPR. It can be concluded that the measured average BER of an adaptive antenna array with both theta and phi components has an excellent BER performance in a multipath propagation environment with a cross-polarized component","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"70 1","pages":"4569-4572"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86262319","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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