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2008 International Conference on Microwave and Millimeter Wave Technology最新文献

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In-vitro and in-vivo techniques to measure the dielectric constant of biological tissues at microwave frequencies 在微波频率下测量生物组织介电常数的体外和体内技术
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540556
Zhanxian Wang, W. Che
{"title":"In-vitro and in-vivo techniques to measure the dielectric constant of biological tissues at microwave frequencies","authors":"Zhanxian Wang, W. Che","doi":"10.1109/ICMMT.2008.4540556","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540556","url":null,"abstract":"This paper presents the revised techniques used both in in-vitro and in-vivo measurement of dielectric constant of biological tissues. The in-vitro technique introduces a revised perturbation technique through a RW cavity while the in-vivo measurement is implemented by a revised coaxial monopole antenna used in microwave coagulation therapy of liver cancer- PMCT probe. Both the advantages and disadvantages of these two methods are compared. All the experiments are carried out at S-band covering the medical microwave frequency. The future direction of the measurement work and the possible application of this technique are introduced also.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128556185","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
Coupler design and test for X-band hybrid loaded circular waveguide accelerator x波段混合负载圆波导加速器耦合器设计与测试
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540487
Xiaodong He, Cong-feng Wu, Sai Dong
{"title":"Coupler design and test for X-band hybrid loaded circular waveguide accelerator","authors":"Xiaodong He, Cong-feng Wu, Sai Dong","doi":"10.1109/ICMMT.2008.4540487","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540487","url":null,"abstract":"The coupler for X-band hybrid dielectric-metal disk-loaded circular waveguide accelerator was designed and tested. The S parameters versus the coupler cavity radius b, the iris aperture w and its thickness h have been simulated by Microwave Studioreg. The optimized reflection coefficient Sn being 0.01 was got at 9.372 GHz. The experiment result of the standing-wave ratio SWR of the coupling cavity being 1.03 was obtained at 9.372 GHz. The simulated results are accorded with the tested results.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128639867","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
Definition and measurement technique of nonlinear network function to microwave circuit 微波电路非线性网络函数的定义与测量技术
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540354
Sun Lu, W. Jiali, Liu Xiaoli, Ni Feng
{"title":"Definition and measurement technique of nonlinear network function to microwave circuit","authors":"Sun Lu, W. Jiali, Liu Xiaoli, Ni Feng","doi":"10.1109/ICMMT.2008.4540354","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540354","url":null,"abstract":"To nonlinear microwave circuit at large signal, linear network parameter is unable to describe and design them accurately. From the definition of linear network parameter, description of the nonlinear network function is proposed, among them the emphasis is the nonlinear scattering function. Implications of every nonlinear network function and relations between them are derived. Through the research on measurement system and extraction method of nonlinear scattering function, correct result can be got. This theory can be used as a new tool to character nonlinear microwave circuit.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129546154","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
Research on the transmissivity of some clothing materials at millimeter-wave band 几种服装材料在毫米波波段的透射率研究
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540812
Z. Xiao, Jianzhong Xu, Taiyang Hu
{"title":"Research on the transmissivity of some clothing materials at millimeter-wave band","authors":"Z. Xiao, Jianzhong Xu, Taiyang Hu","doi":"10.1109/ICMMT.2008.4540812","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540812","url":null,"abstract":"The passive millimeter-wave (PMMW) imaging technology used for the detection of contraband concealed on personnel has been extensively studied, due to the fact that millimeter-wave (MMW) can readily penetrate clothing materials and the passive operation mode doesn't present a safety hazard to the persons who are under inspection. However, the research on the transmission property of clothing materials covered on contraband has received relatively little attention, although it also plays an important role in design and fabrication of the whole imaging system. This paper focuses on the problem of measuring the transmissivity of some clothing materials with different thickness. These measurements are carried out in a RF anechoic chamber, based on the analysis to radiation characteristics of contraband carried on personnel. In addition, the theoretical model of the radiometric temperature contrast between human body and contraband at MMW band is also described in detail. Ultimately, the measurement results of some clothing materials are presented and analyzed.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127360580","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
An overlapped subaperture polar format algorithm based on sub-chirp signals 基于子啁啾信号的重叠子孔径极坐标格式算法
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540903
X. Mao, Daiyin Zhu, Zhaoda Zhu
{"title":"An overlapped subaperture polar format algorithm based on sub-chirp signals","authors":"X. Mao, Daiyin Zhu, Zhaoda Zhu","doi":"10.1109/ICMMT.2008.4540903","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540903","url":null,"abstract":"In this work, a 2-D subaperture polar format algorithm (PFA) based on stepped-chirp signal is proposed. Instead of traditional pulse synthesis preprocessing, the presented method integrates the pulse synthesis process into the range subaperture processing. Meanwhile, due to the multi-resolution property of subaperture processing, this algorithm is able to compensate the space-variant phase error caused by the radar motion during the pulse cluster. Point target simulation has validated the presented algorithm.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129993245","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
Investigation of different types of array structures for smart antennas 智能天线阵列结构的研究
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540633
Liu Jin, Li Li, Huazhi Wang
{"title":"Investigation of different types of array structures for smart antennas","authors":"Liu Jin, Li Li, Huazhi Wang","doi":"10.1109/ICMMT.2008.4540633","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540633","url":null,"abstract":"As the growing demand for mobile communications constantly increases, the need for better coverage, improved capacity, and higher transmission quality rises. Smart antenna used in code division multiple access (CDMA) systems can effectively maximum capacity and improve reliability and coverage by directing beam patterns towards the desired signals and null-patterns towards the interferers. Although numerous studies for smart antennas have already been conducted, including mostly uniform linear arrays (ULA), not as much effort has been devoted to other configurations. In this paper, the performance of smart antennas with uniform linear arrays (ULA), uniform circular arrays (UCA) and uniform rectangular arrays (URA) is examined and compared. With the use of three different types of array antennas, the two main issues related to smart antennas - estimation of the direction of arrival from incoming signals and adaptive beamforming - are both analyzed.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130034040","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: 34
Methods of eliminating Doppler dispersion in synthetic wideband signal 合成宽带信号中多普勒频散的消除方法
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540743
W. Peng, Xue-gang Wang, Jian-hong Zhao
{"title":"Methods of eliminating Doppler dispersion in synthetic wideband signal","authors":"W. Peng, Xue-gang Wang, Jian-hong Zhao","doi":"10.1109/ICMMT.2008.4540743","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540743","url":null,"abstract":"As the technological advances, it is possible to perform wide bandwidth signal processing for high range resolution and target identification in the modern radar systems. In order to prevent the deleterious effects of dispersion for wideband signals, a wideband signal can be synthesized by coherently combining the individual narrow band components, meanwhile, clutter mitigation, estimation and discrimination of target's velocity is enabled by performing coherent pulse train in each subband. However, the separate and independent processing using conventional Doppler filter bank in a subband can also introduce deleterious effects of target Doppler dispersion among subbands and cause the distortion on synthesized one-dimensional range profile. In this paper, we first analyze the target Doppler dispersion among subbands and deleterious effects of following recombination, and then propose an effective method to eliminate the deleterious effects of target Doppler dispersion in subbands. The method is easy to be realized and tractable and do not require an increment of computation. Its good performance is verified by simulation results.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130046030","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
Investigation on ultra-wideband printed circular monopole antenna with frequency-notched 频率陷波的超宽带印刷圆形单极天线研究
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540844
Zhantao Yang, Li Li, Huazhi Wang
{"title":"Investigation on ultra-wideband printed circular monopole antenna with frequency-notched","authors":"Zhantao Yang, Li Li, Huazhi Wang","doi":"10.1109/ICMMT.2008.4540844","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540844","url":null,"abstract":"This paper presents a novel design of a printed circular monopole antenna for ultra-wideband applications. It consists of a circular patch with an arc slot notched, which intends to obtain frequency notched for WLAN. To broaden the bandwidth and shorten the width of the substrate, a truncated ground plane is introduced. Thus, the width of the substrate is sharply shortened than previous studies. And also a simple formula modified to predict the lower edge of the bandwidth more accurately for the proposed configuration is presented. The proposed antenna operates from 2.65GHz to 13GHz for return loss of less than -10dB with 4.95-5.95GHz notched. Other performance of the antenna is also presented. The simulated results which are validated by Ansoft HFSS and CST Microwave Studio coincide with each other well. Therefore, they validate the good performance of the antenna for UWB applications.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130097278","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
Circularly polarized antenna based on dual-mode circular SIW cavity 基于双模圆形SIW腔的圆极化天线
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540609
G. Luo, Lingling Sun
{"title":"Circularly polarized antenna based on dual-mode circular SIW cavity","authors":"G. Luo, Lingling Sun","doi":"10.1109/ICMMT.2008.4540609","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540609","url":null,"abstract":"This paper describes design method of a novel circularly polarized antenna backed by low profile circular SIW cavity. The proposed antenna provides high circularly polarized radiation performance. It can be seamlessly integrated with planar circuits and more conveniently fabricated by normal PCB with low cost.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130139340","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: 26
Modeling the nonlinear power amplifier with memory using complex-valued radial basis function networks 基于复值径向基网络的非线性记忆功率放大器建模
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540312
Mingyu Li, Songbai He, Xiaodong Li
{"title":"Modeling the nonlinear power amplifier with memory using complex-valued radial basis function networks","authors":"Mingyu Li, Songbai He, Xiaodong Li","doi":"10.1109/ICMMT.2008.4540312","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540312","url":null,"abstract":"In this paper, we propose a novel complex-valued RBF networks approach for dynamic behavioral modeling of nonlinear power amplifier with memory. The complex recursive orthogonal least squares (ROLS) algorithm is applied to train complex radial basis function (RBF) network when modeling, so as to save large memory and computational efforts. Using the information available from the trained network with complex ROLS algorithm, the effective centers of the network can be obtained by adopting backward selection algorithm, which achieve acceptable accuracy with significant reduction of network structure. The model has been validated using measured and simulated data. The results of simulation and experimentation show that this complex RBF network model requires a significantly reduced complexity in the analysis and training procedures, when driven with WCDMA signals, than previously published neural-network-based PA models.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132077540","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
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