Pub Date : 1900-01-01DOI: 10.1109/ISAPE.2003.1276644
Yunlin Liu, Yong Wang, C. Liao, Rugui Yang
The finite element method (FEM) is applied to analyze a thin substrate antenna with shorting posts. The numerical results of the resonant frequencies are found in good agreement with the experimental data.
采用有限元法对带短柱的薄基板天线进行了分析。谐振频率的数值计算结果与实验数据吻合较好。
{"title":"Numerical analysis of a patch antenna with shorting posts","authors":"Yunlin Liu, Yong Wang, C. Liao, Rugui Yang","doi":"10.1109/ISAPE.2003.1276644","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276644","url":null,"abstract":"The finite element method (FEM) is applied to analyze a thin substrate antenna with shorting posts. The numerical results of the resonant frequencies are found in good agreement with the experimental data.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115078763","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276682
Li. Qiong, Gan Long, Ye Zhongfu
The performance of high-resolution DOA estimation methods seriously degenerates when there are model errors in array manifold. According to various prior knowledge of array manifold, this paper classifies series of array self-calibration methods based on second order statistics, then discusses them and concludes their advantages and disadvantages, finally gives some prospect for research on self-calibration.
{"title":"An overview of self-calibration in sensor array processing","authors":"Li. Qiong, Gan Long, Ye Zhongfu","doi":"10.1109/ISAPE.2003.1276682","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276682","url":null,"abstract":"The performance of high-resolution DOA estimation methods seriously degenerates when there are model errors in array manifold. According to various prior knowledge of array manifold, this paper classifies series of array self-calibration methods based on second order statistics, then discusses them and concludes their advantages and disadvantages, finally gives some prospect for research on self-calibration.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131811884","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276752
M. Nishi, A. Yabuki, T. Yoshida
In order to clarify the receiving condition in the whole room, in this paper, the received level contour map is created based on the measured data of the UHF band radio wave in the indoor environment. Moreover, this paper investigates the effects of applying the space diversity technique that have been well known to be effective techniques to improve the deep fading considering the space uncorrelation of the received level (M. Schwartz et al.) By use of the measured level data, in order to clarify the space diversity effects in the indoor environments, the correlation coefficients between two branches and the cumulative probabilities of the received level are evaluated in case that the space diversity techniques with selection combining are applied.
{"title":"Effect of space diversity technique in UHF band radio indoor propagation","authors":"M. Nishi, A. Yabuki, T. Yoshida","doi":"10.1109/ISAPE.2003.1276752","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276752","url":null,"abstract":"In order to clarify the receiving condition in the whole room, in this paper, the received level contour map is created based on the measured data of the UHF band radio wave in the indoor environment. Moreover, this paper investigates the effects of applying the space diversity technique that have been well known to be effective techniques to improve the deep fading considering the space uncorrelation of the received level (M. Schwartz et al.) By use of the measured level data, in order to clarify the space diversity effects in the indoor environments, the correlation coefficients between two branches and the cumulative probabilities of the received level are evaluated in case that the space diversity techniques with selection combining are applied.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133795747","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276620
Gao Huotao, Li Jie, Zheng Xia, Wei Zhongwei
One of the major challenges in using coast-based high frequency surface wave radar (HFSWR) is, for the purpose of the long-range detection of ships and aircraft as well as icebergs, or the remote sensing of the ocean environment using the coast-based HFSWR, how the size of transmitting and receiving antennas are reduced at lower end of the HF band. In this paper, according to the operating frequency bandwidth for a HFSWR, where both the gain and the voltage standing wave ratio (VSWR) of a receiving monopole can satisfy the requirement of engineering design, it mainly describes the process in which the loading circuit parameters, locations of the loads along the antenna, as well as matching network parameters are optimized by the simulated annealing algorithm (SAA) to achieve a VSWR less than 3 in the operating frequency bandwidth. Several examples antennas illustrate that the SAA is an effective method for designing HF broadband loaded antennas.
{"title":"Optimal design of broadband loaded receiving antenna for HFSWR using simulated annealing","authors":"Gao Huotao, Li Jie, Zheng Xia, Wei Zhongwei","doi":"10.1109/ISAPE.2003.1276620","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276620","url":null,"abstract":"One of the major challenges in using coast-based high frequency surface wave radar (HFSWR) is, for the purpose of the long-range detection of ships and aircraft as well as icebergs, or the remote sensing of the ocean environment using the coast-based HFSWR, how the size of transmitting and receiving antennas are reduced at lower end of the HF band. In this paper, according to the operating frequency bandwidth for a HFSWR, where both the gain and the voltage standing wave ratio (VSWR) of a receiving monopole can satisfy the requirement of engineering design, it mainly describes the process in which the loading circuit parameters, locations of the loads along the antenna, as well as matching network parameters are optimized by the simulated annealing algorithm (SAA) to achieve a VSWR less than 3 in the operating frequency bandwidth. Several examples antennas illustrate that the SAA is an effective method for designing HF broadband loaded antennas.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134251602","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276630
T. Chakravarty, S. Chakrabarti, A. Das
In this paper we present the design and optimization approach for the development of S-band microstrip antenna array system with integrated diplexer. The optimization technique using a commercial MoM based solution is discussed in details. The design technique for the microstrip diplexer is also discussed. Measured results display exemplary accuracy with simulated results thereby justifying the use of such techniques for synthesis of antenna arrays.
{"title":"An optimization technique for the design of S-band patch antenna array suitable for dual-frequency operation","authors":"T. Chakravarty, S. Chakrabarti, A. Das","doi":"10.1109/ISAPE.2003.1276630","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276630","url":null,"abstract":"In this paper we present the design and optimization approach for the development of S-band microstrip antenna array system with integrated diplexer. The optimization technique using a commercial MoM based solution is discussed in details. The design technique for the microstrip diplexer is also discussed. Measured results display exemplary accuracy with simulated results thereby justifying the use of such techniques for synthesis of antenna arrays.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134321679","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276707
Quan Shaohui, He Guoye, Xu Yongbin
Through experimental study, backscatter characteristics of dihedral corner reflectors are studied. Both frequency and azimuth characteristics are discussed. On the other hand, effect of radar absorbing material (RAM) is verified. Based on all these experiments, a compact range (CR) plane scanning frame (PSF) system, which physical size is about 7.1 m high and 3 m wide, is designed and manufactured. The estimation of its radar cross section (RCS) is by one-dimensional (1-D) down-range imaging method. 1-D images prove that its RCS is less than 0 dBsm (1 m/sup 2/. It meets requirements of practical engineering very well and has been applied in a large CR performance testing successfully.
{"title":"Stealthy design of a compact range plane scanning frame","authors":"Quan Shaohui, He Guoye, Xu Yongbin","doi":"10.1109/ISAPE.2003.1276707","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276707","url":null,"abstract":"Through experimental study, backscatter characteristics of dihedral corner reflectors are studied. Both frequency and azimuth characteristics are discussed. On the other hand, effect of radar absorbing material (RAM) is verified. Based on all these experiments, a compact range (CR) plane scanning frame (PSF) system, which physical size is about 7.1 m high and 3 m wide, is designed and manufactured. The estimation of its radar cross section (RCS) is by one-dimensional (1-D) down-range imaging method. 1-D images prove that its RCS is less than 0 dBsm (1 m/sup 2/. It meets requirements of practical engineering very well and has been applied in a large CR performance testing successfully.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133348579","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276755
Yongming Huang, Yinghua Lu, Hongxin Lu, Li Xu, Jiangang Lu
Buildings such as office blocks, individual houses and department stores have walls constructed from dielectric layers. It is important to characterize the properties of radio propagation through multilayered dielectric structures. In this work, plane wave incidence on dielectric layers is treated by using transmission-line theory. Transmission and reflection properties of plane wave for double layers in the UHF and SHF bands for wireless LAN arc presented and the results of different parameters arc compared. Thus, it will provide a guideline to design and deploy wireless LANs in communication environments.
{"title":"Transmission and reflection properties of dielectric layers in the UHF and SHF bands for wireless LANS","authors":"Yongming Huang, Yinghua Lu, Hongxin Lu, Li Xu, Jiangang Lu","doi":"10.1109/ISAPE.2003.1276755","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276755","url":null,"abstract":"Buildings such as office blocks, individual houses and department stores have walls constructed from dielectric layers. It is important to characterize the properties of radio propagation through multilayered dielectric structures. In this work, plane wave incidence on dielectric layers is treated by using transmission-line theory. Transmission and reflection properties of plane wave for double layers in the UHF and SHF bands for wireless LAN arc presented and the results of different parameters arc compared. Thus, it will provide a guideline to design and deploy wireless LANs in communication environments.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116152703","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276673
Lin Shu, Junhong Wang, Hua Shi, Zengrui Li
The leaky coaxial cable (LCX) with vertical periodic slots is considered as an antenna array. By superposition principle, the field distributions of the LCX both in radial and axis directions are analyzed, the radiation patterns for near and far regions of the cable are studied. The relationships between the field distributions and the radiation modes are discussed. In addition, the field distribution and fluctuation of a discrete antenna system are also studied in terms of the theory of LCX for comparison.
{"title":"Research on the radiation characteristics of the leaky coaxial cables","authors":"Lin Shu, Junhong Wang, Hua Shi, Zengrui Li","doi":"10.1109/ISAPE.2003.1276673","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276673","url":null,"abstract":"The leaky coaxial cable (LCX) with vertical periodic slots is considered as an antenna array. By superposition principle, the field distributions of the LCX both in radial and axis directions are analyzed, the radiation patterns for near and far regions of the cable are studied. The relationships between the field distributions and the radiation modes are discussed. In addition, the field distribution and fluctuation of a discrete antenna system are also studied in terms of the theory of LCX for comparison.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116557770","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276662
Wen-hua Chen, Bing Bai, Zhenghe Feng
Using a dielectric resonator ring around the monopole to reduce the profile of the parasitic antenna array, it is shown that less than 50% of the original height can be achieved, and a parasitic array with a dielectric ring for each monopole is studied.
{"title":"Low profile parasitic antenna array of monopole by using dielectric resonator ring","authors":"Wen-hua Chen, Bing Bai, Zhenghe Feng","doi":"10.1109/ISAPE.2003.1276662","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276662","url":null,"abstract":"Using a dielectric resonator ring around the monopole to reduce the profile of the parasitic antenna array, it is shown that less than 50% of the original height can be achieved, and a parasitic array with a dielectric ring for each monopole is studied.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125760445","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276636
Fang-ming Zhu, Qing-chun Lin, Sailing He, Jun Hu, Z. Ying
A high directivity patch antenna using a photonic bandgap (PBG) cover together with a PBG substrate is designed. The input return loss, radiation pattern and directivity of this antenna are studied by the finite-difference time-domain method. The directivity of the PBG antenna is greatly improved. Experimental results are also reported to verify the design.
{"title":"A high directivity patch antenna using a PBG cover together with a PBG substrate","authors":"Fang-ming Zhu, Qing-chun Lin, Sailing He, Jun Hu, Z. Ying","doi":"10.1109/ISAPE.2003.1276636","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276636","url":null,"abstract":"A high directivity patch antenna using a photonic bandgap (PBG) cover together with a PBG substrate is designed. The input return loss, radiation pattern and directivity of this antenna are studied by the finite-difference time-domain method. The directivity of the PBG antenna is greatly improved. Experimental results are also reported to verify the design.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123486811","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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