Pub Date : 2006-10-23DOI: 10.1109/APS.2006.1710715
G. Mazzarella, G. Montisci, N. Schirru, G. Serra
A new approach for the reflector surface diagnostics, based on the Backus-Gilbert inversion method, is presented. Some preliminary results shows the feasibility and the accuracy of the presented approach
{"title":"A Backus-Gilbert approach to the reflector surface reconstruction","authors":"G. Mazzarella, G. Montisci, N. Schirru, G. Serra","doi":"10.1109/APS.2006.1710715","DOIUrl":"https://doi.org/10.1109/APS.2006.1710715","url":null,"abstract":"A new approach for the reflector surface diagnostics, based on the Backus-Gilbert inversion method, is presented. Some preliminary results shows the feasibility and the accuracy of the presented approach","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"78 3 1","pages":"1053-1056"},"PeriodicalIF":0.0,"publicationDate":"2006-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87911250","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 : 2006-10-23DOI: 10.1109/APS.2006.1711655
Q. Yuan, T. Suguro, Q. Chen, K. Sawaya, E. Kudoh, F. Adachi
The effect of the antenna geometry and the adaptive algorithm on the performance of a W-CDMA adaptive array antenna for mobile terminals is investigated experimentally. A W-CDMA receiving system for a 4-element array antenna is developed. The adaptive algorithm and the array antenna configuration are changed according to the requirement of the investigation. The performance of the system including synthesized pattern, adaptive weight and bit-error-rate (BER) characteristics are measured for the performance analysis. Results show that signal-to-interference ratio (SIR) can be greatly improved by 6 to 10 dB compared with the single antenna when BER is equal to 10-3. BER of the single monopole with a reflector is lower than that of the single monopole because the monopole with reflector has a higher gain in the direction of the desired wave. However, the SIR improvement of the monopole array is larger than that of the monopole array with a reflector because the array element gain of the monopole to the direction of the interference is larger. It seems that array elements which have homogeneous radiation pattern and high radiation efficiency are suitable to the adaptive array antennas
{"title":"Performance Study of W-CDMA Adaptive Array Antennas","authors":"Q. Yuan, T. Suguro, Q. Chen, K. Sawaya, E. Kudoh, F. Adachi","doi":"10.1109/APS.2006.1711655","DOIUrl":"https://doi.org/10.1109/APS.2006.1711655","url":null,"abstract":"The effect of the antenna geometry and the adaptive algorithm on the performance of a W-CDMA adaptive array antenna for mobile terminals is investigated experimentally. A W-CDMA receiving system for a 4-element array antenna is developed. The adaptive algorithm and the array antenna configuration are changed according to the requirement of the investigation. The performance of the system including synthesized pattern, adaptive weight and bit-error-rate (BER) characteristics are measured for the performance analysis. Results show that signal-to-interference ratio (SIR) can be greatly improved by 6 to 10 dB compared with the single antenna when BER is equal to 10-3. BER of the single monopole with a reflector is lower than that of the single monopole because the monopole with reflector has a higher gain in the direction of the desired wave. However, the SIR improvement of the monopole array is larger than that of the monopole array with a reflector because the array element gain of the monopole to the direction of the interference is larger. It seems that array elements which have homogeneous radiation pattern and high radiation efficiency are suitable to the adaptive array antennas","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"41 1","pages":"4573-4576"},"PeriodicalIF":0.0,"publicationDate":"2006-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74449923","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 : 2006-10-23DOI: 10.1109/APS.2006.1711391
X.C. Wei, E. Li
In this paper, the statistical property of the transmitting antenna reflection inside a reverberation chamber is studied. Furthermore, the normalization methods by using the forward and net power of the transmitting antenna in the chamber calibration are compared. The results show that the fwd-normalization method is accurate enough for the practical engineering application. Further comparison on the accuracy of field uniformity calibration by using the fwd-normalization and net-normalization methods are done
{"title":"Reflection of Transmitting Antenna in Reverberation Chamber and Its Effect on Chi-square Validation","authors":"X.C. Wei, E. Li","doi":"10.1109/APS.2006.1711391","DOIUrl":"https://doi.org/10.1109/APS.2006.1711391","url":null,"abstract":"In this paper, the statistical property of the transmitting antenna reflection inside a reverberation chamber is studied. Furthermore, the normalization methods by using the forward and net power of the transmitting antenna in the chamber calibration are compared. The results show that the fwd-normalization method is accurate enough for the practical engineering application. Further comparison on the accuracy of field uniformity calibration by using the fwd-normalization and net-normalization methods are done","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"13 1","pages":"3573-3576"},"PeriodicalIF":0.0,"publicationDate":"2006-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73177283","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 : 2006-10-23DOI: 10.1109/APS.2006.1711239
Dong Hyun Lee, Jae Hee Kim, J. Jang, Yun-Taek Im, W. Park
This paper introduces a suspended stripline over mushroom-like SMPs that has excellent band stop filter characteristics, and apply it to the conventional DFDP antenna in order to enhance isolation. Since the structure of the suspended stripline over the SMP provides strong coupling between the feedline and the SMP, a significant skirt rejection band and near 0 dB the insertion loss outside the rejection band can be achieved with only two SMP unit cells
{"title":"Suspended stripline over mushroom-like shorted metallic patches and its application to the dual-frequency dual-polarization antenna","authors":"Dong Hyun Lee, Jae Hee Kim, J. Jang, Yun-Taek Im, W. Park","doi":"10.1109/APS.2006.1711239","DOIUrl":"https://doi.org/10.1109/APS.2006.1711239","url":null,"abstract":"This paper introduces a suspended stripline over mushroom-like SMPs that has excellent band stop filter characteristics, and apply it to the conventional DFDP antenna in order to enhance isolation. Since the structure of the suspended stripline over the SMP provides strong coupling between the feedline and the SMP, a significant skirt rejection band and near 0 dB the insertion loss outside the rejection band can be achieved with only two SMP unit cells","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"27 1","pages":"3001-3004"},"PeriodicalIF":0.0,"publicationDate":"2006-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72862389","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}
This paper presents a circularly polarized (CP) broadband high efficiency active integrated antenna (AIA). To realize the broadband CP antenna, a circular patch is coupled by crossed slots in the ground plane, which are fed by an L-shaped microstrip feed line below the ground. The antenna is designed to serve as the harmonics-terminated load for class-E high-efficiency power amplifier (PA). The broadband CP active antenna is realized by directly integrating the broadband CP antenna with a broadband class-E PA
{"title":"Low-cost circularly polarized broadband high efficiency active integrated antenna","authors":"S. Gao, Y. Qin, A. Sambell","doi":"10.1002/MOP.21940","DOIUrl":"https://doi.org/10.1002/MOP.21940","url":null,"abstract":"This paper presents a circularly polarized (CP) broadband high efficiency active integrated antenna (AIA). To realize the broadband CP antenna, a circular patch is coupled by crossed slots in the ground plane, which are fed by an L-shaped microstrip feed line below the ground. The antenna is designed to serve as the harmonics-terminated load for class-E high-efficiency power amplifier (PA). The broadband CP active antenna is realized by directly integrating the broadband CP antenna with a broadband class-E PA","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"44 1","pages":"1525-1528"},"PeriodicalIF":0.0,"publicationDate":"2006-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74350542","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.2006.1710531
T. Amert, B. Glover, K. Whites
More recently, structures capable of being produced inexpensively and operated in the more commercially viable bands have been proposed. Unfortunately, high impedance (high-Z) surfaces capable of operating at lower frequencies tend to be far more susceptible to fabrication errors because of complex surface patterns. In most cases, standard circuit board manufacturing tolerances are too loose to create such high-Z surfaces to the necessary accuracy. To circumvent these difficulties in fabrication, we propose that adding a small degree of anisotropy to high-Z surfaces can enable compensatory tunability for certain planar antennas located on the surface by simply rotating the antenna. Doing so allows fabrication tolerances to be loosened to those available for large scale, inexpensive fabrication
{"title":"Using anisotropic high impedance surfaces for tuning antenna performance","authors":"T. Amert, B. Glover, K. Whites","doi":"10.1109/APS.2006.1710531","DOIUrl":"https://doi.org/10.1109/APS.2006.1710531","url":null,"abstract":"More recently, structures capable of being produced inexpensively and operated in the more commercially viable bands have been proposed. Unfortunately, high impedance (high-Z) surfaces capable of operating at lower frequencies tend to be far more susceptible to fabrication errors because of complex surface patterns. In most cases, standard circuit board manufacturing tolerances are too loose to create such high-Z surfaces to the necessary accuracy. To circumvent these difficulties in fabrication, we propose that adding a small degree of anisotropy to high-Z surfaces can enable compensatory tunability for certain planar antennas located on the surface by simply rotating the antenna. Doing so allows fabrication tolerances to be loosened to those available for large scale, inexpensive fabrication","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"35 1","pages":"357-360"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73475992","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.2006.1710914
X. Ping, R. Chen
In this paper, the hierarchical tangential vector finite-element method (TVFEM) equations are solved with the Swartz methods combined with Krylov subspace iterative methods. As our numerical results have shown, the proposed method is very efficient in the analysis of hierarchical TVFEM equations for electromagnetic problems
{"title":"The combination of Swartz method and Krylov subspace iterative methods to solve Hierarchal TVFEM equations","authors":"X. Ping, R. Chen","doi":"10.1109/APS.2006.1710914","DOIUrl":"https://doi.org/10.1109/APS.2006.1710914","url":null,"abstract":"In this paper, the hierarchical tangential vector finite-element method (TVFEM) equations are solved with the Swartz methods combined with Krylov subspace iterative methods. As our numerical results have shown, the proposed method is very efficient in the analysis of hierarchical TVFEM equations for electromagnetic problems","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"2014 1","pages":"1791-1794"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73720995","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.2006.1710901
A. Thiry, F. Costen, A. Brown
The frequency dependent alternating direction-implicit finite difference time domain (FD-ADI-FDTD) method is designed to handle FD materials and there is to date no study of the influence of FD materials on the complex frequency-shifted perfectly matched layer (CFS-PML) parameters. This paper studies the effects of the CFS-PML parameters on the reflection coefficient with regard to the FD media parameters
频率相关的交变方向隐式时域有限差分(FD- adi - fdtd)方法是为处理FD材料而设计的，迄今为止还没有研究FD材料对复频移完美匹配层(CFS-PML)参数的影响。本文研究了CFS-PML参数对FD介质参数反射系数的影响
{"title":"Optimization of CFS-PML Parameters for FD-ADI-FDTD","authors":"A. Thiry, F. Costen, A. Brown","doi":"10.1109/APS.2006.1710901","DOIUrl":"https://doi.org/10.1109/APS.2006.1710901","url":null,"abstract":"The frequency dependent alternating direction-implicit finite difference time domain (FD-ADI-FDTD) method is designed to handle FD materials and there is to date no study of the influence of FD materials on the complex frequency-shifted perfectly matched layer (CFS-PML) parameters. This paper studies the effects of the CFS-PML parameters on the reflection coefficient with regard to the FD media parameters","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"44 1","pages":"1743-1746"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73884640","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.2006.1711285
I. Waldron, S. Makarov
The present study discusses a new microstrip-based resonant device that is specifically intended for foam measurements at frequencies 1-10 GHz. It is based on a microstrip ring resonator. However, the ring and the feed network are physically located in separate planes, thus enabling the placement of an arbitrary sample of material to be measured in the substrate of the ring resonator. A transmission line method (TLM) is used to predict the frequency response. Preliminary experimental data in L- and S-bands are presented and compared with theory estimates for the foams
{"title":"Measurement of dielectric permittivity and loss tangent for bulk foam samples with suspended ring resonator method","authors":"I. Waldron, S. Makarov","doi":"10.1109/APS.2006.1711285","DOIUrl":"https://doi.org/10.1109/APS.2006.1711285","url":null,"abstract":"The present study discusses a new microstrip-based resonant device that is specifically intended for foam measurements at frequencies 1-10 GHz. It is based on a microstrip ring resonator. However, the ring and the feed network are physically located in separate planes, thus enabling the placement of an arbitrary sample of material to be measured in the substrate of the ring resonator. A transmission line method (TLM) is used to predict the frequency response. Preliminary experimental data in L- and S-bands are presented and compared with theory estimates for the foams","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"5 1","pages":"3175-3178"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73906052","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.2006.1710675
H. Sato, K. Nakanishi, K. Sawaya
In this paper, the time domain characteristics of the APFA were investigated experimentally. Also a monostatic pulse radar was developed using APFA and applied to the circular-scan time-domain imaging. The real-time imaging by the array of APFA remains as a future work
{"title":"Experimental study of circular-scan time-domain active imaging by using broadband antipodal Fermi antenna","authors":"H. Sato, K. Nakanishi, K. Sawaya","doi":"10.1109/APS.2006.1710675","DOIUrl":"https://doi.org/10.1109/APS.2006.1710675","url":null,"abstract":"In this paper, the time domain characteristics of the APFA were investigated experimentally. Also a monostatic pulse radar was developed using APFA and applied to the circular-scan time-domain imaging. The real-time imaging by the array of APFA remains as a future work","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"27 1","pages":"901-904"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75247499","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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