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2007 International Conference on Microwave and Millimeter Wave Technology最新文献

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A Compact Dielectric Waveguide Directional Coupler Utilizing a Tapering Left-Handed Slab Core 一种紧凑的介质波导定向耦合器，利用锥形左手板芯
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381342
M. Huang, S.J. Xu
{"title":"A Compact Dielectric Waveguide Directional Coupler Utilizing a Tapering Left-Handed Slab Core","authors":"M. Huang, S.J. Xu","doi":"10.1109/ICMMT.2007.381342","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381342","url":null,"abstract":"A novel dielectric waveguide directional coupler with a tapering left-handed slab core located in the coupling region is analyzed by the staircase approximation method, which combines the building block approach and multi-mode network theory with a rigorous mode-matching procedure. Particular attention is directed toward the radiation and coupling characteristics under different structural parameters of the coupler. Numerical results indicate that the proposed coupler is very promising by shortening the coupling length significantly while keeping the radiation loss at a low level.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123368425","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}
引用次数: 0
Analysis of Irregular Multiconductor Transmission Line Structures with External Electromagnetic Field 外加电磁场作用下不规则多导体传输线结构分析
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381378
Xiang-lan Wei, Qiang Wang
{"title":"Analysis of Irregular Multiconductor Transmission Line Structures with External Electromagnetic Field","authors":"Xiang-lan Wei, Qiang Wang","doi":"10.1109/ICMMT.2007.381378","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381378","url":null,"abstract":"Some irregular multiconductor transmission line (MTL) structures on printed circuit board (PCB) with external electromagnetic (EM) field are analyzed using EM topology and BLT (Baum, Liu, Tesche) equation. By introducing nodes and tubes, MTL structures can be accurately described using EM topology. Based on these topology models, the frequency-domain responses of the MTL structures in the presence of external electromagnetic field are obtained using BLT equation. To validate this application, the results are compared with those using EM simulation software, and they are in good agreement.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115252666","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}
引用次数: 1
An Optimization Coverage Mechanism in Sensor Networks based on ACO 基于蚁群算法的传感器网络优化覆盖机制
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381508
Ru Huang, Jie Zhu, Guang-Hui Xu
{"title":"An Optimization Coverage Mechanism in Sensor Networks based on ACO","authors":"Ru Huang, Jie Zhu, Guang-Hui Xu","doi":"10.1109/ICMMT.2007.381508","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381508","url":null,"abstract":"In the paper, an energy-efficient Optimization Coverage Mechanism in sensor networks is proposed based on ACO. It can guarantee that each target should be covered by at least one active sensor at the minimum cost, meanwhile, meet the requirement of different coverage accuracy to different levels of targets. To achieve the above mechanism, the novel heuristic factor and global pheromone updating rule are designed, which endow the artificial ants with the ability of coverage-awareness towards the monitored field and energy-awareness towards the sensor area, and finally the optimal robust solution is obtained.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115414347","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}
引用次数: 1
A Novel Folded T-matched Dipole in Base Station 一种新型折叠t型偶极子在基站中的应用
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381295
Q. Chu, Lan Wang, Jing-ke Zhou
{"title":"A Novel Folded T-matched Dipole in Base Station","authors":"Q. Chu, Lan Wang, Jing-ke Zhou","doi":"10.1109/ICMMT.2007.381295","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381295","url":null,"abstract":"In this paper, a novel wideband base station antenna element, T-match folded dipole, is presented and simulated which can cover the WCDMA, UMTS and GSM bands. The T-match dipole is evolved from folded dipole, and can provide 28% impedance bandwidth for VSWR<2.Compared with conventional folded dipole, the T-match dipole provides more flexibility and easy to match with the feed line. Based on the single dipole, a dual polarized antenna is constructed. A good agreement is achieved between simulation and measured results.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132535811","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}
引用次数: 6
LFM extended target echoes detecting using Radon-Wigner Method 基于Radon-Wigner法的LFM扩展目标回波检测
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381494
Zhao Jian-hong, Y. Jianyu
{"title":"LFM extended target echoes detecting using Radon-Wigner Method","authors":"Zhao Jian-hong, Y. Jianyu","doi":"10.1109/ICMMT.2007.381494","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381494","url":null,"abstract":"LFM radar signal with sufficient bandwidth will lead to the high range resolution. When range resolution bin is smaller than the target to be detected, radar echoes will occupy multiple range bins. Dechirping and matched filtering are two pulse compression methods for wideband LFM echoes. This paper put forwards Radon-Wigner transform to detect multi- scatter target echoes. Analysis and computer simulation shows Wigner-Ville transformation of multi-scatter LFM signal will not produce the unwanted cross components, and each component in time-frequency spectrum plot are parallel. Radon-Wigner transform can converge the signal energy together to be detected, so it is a effective processing method.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130860373","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}
引用次数: 7
Time Base Correction Technique in Antenna Time Domain Planar Near Field Measurement 天线时域平面近场测量时基校正技术
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381291
Nan Wang, Zheng-Hui Xue, Shing-Ming Yang, Ruixiang Liu, Xiaowen Xu
{"title":"Time Base Correction Technique in Antenna Time Domain Planar Near Field Measurement","authors":"Nan Wang, Zheng-Hui Xue, Shing-Ming Yang, Ruixiang Liu, Xiaowen Xu","doi":"10.1109/ICMMT.2007.381291","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381291","url":null,"abstract":"In the practice of antenna time domain planar near field measurement, the pulse generator's time base joggling can cause very big errors in measuring results. In this paper, a time base correction technique is developed to deal with this problem. Besides measuring channel, this technique adds a reference channel in measuring system, and uses the reference channel's time base joggling to correct the measuring channel's signal. The practical measuring results have proved this method's reliability.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131041850","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}
引用次数: 4
Using HF-Doppler Detector to Analyze Infrasonic Disturbances 利用高频多普勒探测器分析次声干扰
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381394
C. Jixiang, Zhang Yinghui
{"title":"Using HF-Doppler Detector to Analyze Infrasonic Disturbances","authors":"C. Jixiang, Zhang Yinghui","doi":"10.1109/ICMMT.2007.381394","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381394","url":null,"abstract":"We have been observing infrasonic disturbances by our HF-Doppler detector. Through analyzing their spectrum structures, we can conclude local features of infrasonic disturbances occurring in our area.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128724513","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}
引用次数: 0
Computer-aided design of octo-filar helix antennas with fixed arm length 固定臂长八丝螺旋天线的计算机辅助设计
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381308
Yang Fang, Guo Chen-jiang, Xu Jia-dong, Ding You-jun, Xie Chun-jian
{"title":"Computer-aided design of octo-filar helix antennas with fixed arm length","authors":"Yang Fang, Guo Chen-jiang, Xu Jia-dong, Ding You-jun, Xie Chun-jian","doi":"10.1109/ICMMT.2007.381308","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381308","url":null,"abstract":"An octo-filar helix antenna that can form a backfire or endfire conical beam by changing its pitch angle and feeding modes with its arm length invariable is researched by the Nakano integral equation and the method of moments. A shaped-conical radiation pattern with good circular polarization performance and the best beam conformity can be obtained for almost all the hemisphere. Comparison of the radiation properties, including the beam direction, maximum power gain and 3-dB axial ratio angle coverage under different feeding modes is conducted. The relationship between the pitch angle and the height of the satellite orbit is also presented, which provides theoretical references for the design of the antenna.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126874797","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}
引用次数: 2
Comb-shaped antenna on magneto-dielectric substrate for DYB-H reception 磁介质基板上用于DYB-H接收的梳状天线
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381273
Y. Deng, Q. Chu
{"title":"Comb-shaped antenna on magneto-dielectric substrate for DYB-H reception","authors":"Y. Deng, Q. Chu","doi":"10.1109/ICMMT.2007.381273","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381273","url":null,"abstract":"In this paper, an improved comb-shaped antenna is proposed as a wideband antenna for DVB-H reception. An organic magneto-dielectric material is adopted as the substrate of the proposed antenna. The broadband and miniaturization characteristics are achieved. By changing the length of and the distance between the conducting strips, a stable wideband input impedance is achieved and the complete DVB-H band can be covered with the required gain.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126997075","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}
引用次数: 5
Thermal Analysis of Power SiGe Heterojunction Bipolar Transistor with Novel Segmented Multi-emitter Structure 新型分段多发射极结构的功率SiGe异质结双极晶体管热分析
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381443
Wang Yang, Zhang Wan-rong, Xie Hong-yun, Zhang Wei, He Li-jian, Sha Yong-ping
{"title":"Thermal Analysis of Power SiGe Heterojunction Bipolar Transistor with Novel Segmented Multi-emitter Structure","authors":"Wang Yang, Zhang Wan-rong, Xie Hong-yun, Zhang Wei, He Li-jian, Sha Yong-ping","doi":"10.1109/ICMMT.2007.381443","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381443","url":null,"abstract":"An effective method for enhancing thermal stability of a multi-emitter power heterojunction bipolar transistor (HBT) has been presented. The method employs the segmented emitter structure rather than the traditional non-segmented structure to suppress the junction temperature rise and reduce the thermal resistance. A suitable thermal model, which includes various thermal resistances of the different components, is built for the segmented multi-emitter HBT. Using this model, the thermal simulation for a ten-finger power SiGe HBT with segmented emitter structure is performed by ANSYS software. Considering the precision of the simulation and the restriction of ANSYS software, this study proposes two steps simulation method: first substrate simulation and second active region simulation. The three-dimensional temperature distribution on emitter fingers is obtained. Compared with non-segmented structure, the maximum junction temperature, thermal resistance of the power HBT with improved structure is significantly lower as expected, and the thermal stability is enhanced.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124287408","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}
引用次数: 5
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