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2005 Asia-Pacific Microwave Conference Proceedings最新文献

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Analysis for transmission characteristics of a novel open similar V-shaped groove guide 一种新型开放式相似v形槽导轨传动特性分析
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1607018
Jian‐Kang Xiao, Shi-wei Ma, Ying Li, You-jun Zhang
{"title":"Analysis for transmission characteristics of a novel open similar V-shaped groove guide","authors":"Jian‐Kang Xiao, Shi-wei Ma, Ying Li, You-jun Zhang","doi":"10.1109/APMC.2005.1607018","DOIUrl":"https://doi.org/10.1109/APMC.2005.1607018","url":null,"abstract":"A novel similar V-shaped groove guide is analyzed by using the method of lines in this paper. Its transmission characteristics are numerically calculated and analyzed, and the correctness of the method is demonstrated as well. The analytic method has some virtues such as easy formulation, less computation etc., it can be referenced for researching groove guide and disposing electromagnetic field boundary value problems.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121959215","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
An arbitrary waveform generator for SAR test-bench application 用于SAR试验台的任意波形发生器
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606359
Zheng Shenghua, Xu Dazhuan, Jin Xue-ming, Zhang Shishan, Zhang Hongrong
{"title":"An arbitrary waveform generator for SAR test-bench application","authors":"Zheng Shenghua, Xu Dazhuan, Jin Xue-ming, Zhang Shishan, Zhang Hongrong","doi":"10.1109/APMC.2005.1606359","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606359","url":null,"abstract":"Function and performance simulation is an effective method for the development and verification of modern radar modes. Gathering radar raw data during flight trials is an essential but expensive way. In order to minimize such costs, synthetic radar raw data at an early system design stage is adopted widely. In this paper, an arbitrary waveform generator for synthetic aperture radar (SAR) test-bench application is presented. This waveform generator uses high speed multi-DSPs to accelerate the processing to obtain a near real-time baseband echo signal of SAR, and a DDS based frequency synthesizer is used to shift the signal to the operating band. By this way, a lot of system parameters and different target features is simulated and verified. Some result waveforms gained with data created for certain test scenarios by this generator are presented.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122104018","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
Model extractions of coupled bonding-wire structures in electronic packaging 电子封装中耦合键合线结构的模型提取
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606252
Hao-Geng Lin, Tian-Wei Huang, R. Wu, Chien-Min Lin
{"title":"Model extractions of coupled bonding-wire structures in electronic packaging","authors":"Hao-Geng Lin, Tian-Wei Huang, R. Wu, Chien-Min Lin","doi":"10.1109/APMC.2005.1606252","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606252","url":null,"abstract":"An extracted model of coupled bonding wires is presented. The discontinuity caused by the bonding wires would significantly affect the high-speed performance of the whole system as the speed of signal propagation is increasing. The bonding wire structures with regards to the vertical and parallel coupling schemes are analyzed in this paper while their middle interconnections are represented as the cascade network of uniform transmission-line sections. Finally, the validation is implemented by using the established models and measurements to verify the presented analysis methods.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122157425","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
Statistics of lower atmosphere refractivity in Czechia 捷克低层大气折射率统计
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606923
M. Grábner, V. Kvicera
{"title":"Statistics of lower atmosphere refractivity in Czechia","authors":"M. Grábner, V. Kvicera","doi":"10.1109/APMC.2005.1606923","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606923","url":null,"abstract":"Atmospheric refractivity influences significantly the propagation of electromagnetic waves in atmosphere. ITU-R recommends using statistics of a refractivity vertical gradient in the lowest 65 meters above the ground for estimation of multipath fading incidence on the terrestrial fixed wireless links. In this paper, results of the measurement of atmospheric refractivity in a lower 80 m layer of atmosphere are presented. Daily and monthly variability of refractivity and of its vertical gradient is shown. Refractivity statistics are compared with the quantiles obtained from the ITU-R world map.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124479153","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: 12
A FEM-based fast algorithm for high-order modes in dielectric-loaded waveguides 基于有限元的介质负载波导高阶模的快速算法
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606371
Zhen Peng, X. Sheng
{"title":"A FEM-based fast algorithm for high-order modes in dielectric-loaded waveguides","authors":"Zhen Peng, X. Sheng","doi":"10.1109/APMC.2005.1606371","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606371","url":null,"abstract":"A FEM-based fast algorithm is proposed for the computation of high-order modes in dielectric-loaded waveguides in this paper. Numerical examples show that this algorithm requires greatly less memory and has significantly higher efficiency than the previous algorithms. The eigenmodes of the interior-coated waveguide are computed in the paper.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124656128","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 parallel performance of MPI based parallel FDTD on PC clusters PC集群上基于MPI的并行FDTD并行性能分析
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606757
Zhang Yu, Ding Wei, L. Changhong
{"title":"Analysis of parallel performance of MPI based parallel FDTD on PC clusters","authors":"Zhang Yu, Ding Wei, L. Changhong","doi":"10.1109/APMC.2005.1606757","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606757","url":null,"abstract":"This paper presents the concept of \"the optimum virtual topology\" for MPI based parallel FDTD. A new type of base station antenna is simulated with parallel FDTD code developed by our group earlier on a PC cluster with high performance. Then, the influence of different virtual topology schemes on parallel performance of parallel FDTD is studied in detail. Finally the general rules are presented on how to obtain the highest efficiency of parallel FDTD algorithm by optimizing MPI virtual topology.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124676255","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
Increased security level using space-division approach in wireless computing network 在无线计算网络中使用空间划分方法提高安全级别
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606699
Zhaohui Sun, J. Lu, D. Ireland
{"title":"Increased security level using space-division approach in wireless computing network","authors":"Zhaohui Sun, J. Lu, D. Ireland","doi":"10.1109/APMC.2005.1606699","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606699","url":null,"abstract":"This paper presents a new space-division approach for solving the security problems in infrastructured wireless network and ad-hoc wireless network using smart directional antennas. The security level definition according to this approach in WLAN is also proposed, the corresponding experiments in a typical office environment is obtained to evaluate its practicability.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124733173","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
Study of microstrip-line inset-fed and two-layer electromagnetically coupled rectangular patch antennas 微带线插入馈电和双层电磁耦合矩形贴片天线的研究
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606838
Ronghui Zhang, Xiaohong Tang, Wang Ling, Xianjing Zhang
{"title":"Study of microstrip-line inset-fed and two-layer electromagnetically coupled rectangular patch antennas","authors":"Ronghui Zhang, Xiaohong Tang, Wang Ling, Xianjing Zhang","doi":"10.1109/APMC.2005.1606838","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606838","url":null,"abstract":"This paper presents the parametric study of a microstrip-line inset-fed rectangular patch antenna and a two-layer electromagnetically coupled (EMC) rectangular patch antenna. The influence of the inset position and the air thickness between the two layers on input impedance, resonant frequency, and bandwidth is investigated by using software IE3D. The final results show that the inset depth is the primary factor affecting the matching and the air thickness mainly affects the bandwidth. The tested two-layer antenna works at 6.1 GHz with a bandwidth (S/sub 11/ /spl les/ -10dB) of about 11%, 8-dBi gain. The 3-dB beamwidth in the E-plane and H-plane is 57/spl deg/ and 70/spl deg/, respectively.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124760648","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: 11
A study of the low grazing incident effects from fractional Brownian motion rough sea surface 分数布朗运动对粗糙海面低掠入射效应的研究
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606247
Zegui Huang, C. Tong, Guoping Hu, F. Deng, Jiqin Wang
{"title":"A study of the low grazing incident effects from fractional Brownian motion rough sea surface","authors":"Zegui Huang, C. Tong, Guoping Hu, F. Deng, Jiqin Wang","doi":"10.1109/APMC.2005.1606247","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606247","url":null,"abstract":"The problem of the electromagnetic scattering from a fractional Brownian motion (fBm) rough sea surface at low grazing angle (LGA) condition is discussed. The modified effect by high-order small perturbation method based on the fBm model is demonstrated at LGA. It is shown that the scattering results are reasonable agreement with a set of measured data at different incidence angle. Numerical results are finally used to investigate the behavior of the electromagnetic scattering with different fractal dimension at LGA. Lastly the polarized exponent of co-polarized scattering is analyzed with different power of cotangent function.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124769759","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
Pre-compensation for the dynamic nonlinearity of wideband wireless transmitters using augmented Wiener predistorters 利用增强维纳预失真器对宽带无线发射机的动态非线性进行预补偿
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606974
Wiener Predistorters, Taijun Liu, S. Boumaiza, F. Ghannouchi
{"title":"Pre-compensation for the dynamic nonlinearity of wideband wireless transmitters using augmented Wiener predistorters","authors":"Wiener Predistorters, Taijun Liu, S. Boumaiza, F. Ghannouchi","doi":"10.1109/APMC.2005.1606974","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606974","url":null,"abstract":"This paper proposes an augmented Wiener predistorter to improve the pre-compensation performance of the conventional Wiener predistorter for annulling the out-of-band emission of the wideband transmitter. A transmitter prototype, which is based on an Electronic Signal Generator (ESG: Agilent E4438C) and an L-band 60-Watt GaAs FET push-pull amplifier, is utilized to evaluate the performance of the new proposed augmented Wiener predistorter. The validation results by applying a two-carrier WCDMA signal to the transmitter prototype demonstrate the effectiveness of this new predistorter for suppressing the spectrum regrowth caused by the memory effects of the transmitter.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124798011","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: 11
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