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

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Development of a 0.5-THz Waveguide NbN-Based SIS Mixer 基于0.5 thz波导nbn的SIS混频器的研制
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381460
Jing Li, M. Takeda, Zhen Wang, S. Shi
{"title":"Development of a 0.5-THz Waveguide NbN-Based SIS Mixer","authors":"Jing Li, M. Takeda, Zhen Wang, S. Shi","doi":"10.1109/ICMMT.2007.381460","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381460","url":null,"abstract":"This paper mainly reports the development of a 0.5-THz waveguide SIS (superconductor - insulator - superconductor) mixer, which adopts twin NbN-based SIS junctions (NbN/AlN/NbN) connected in parallel. The 0.5-THz waveguide NbN SIS mixer is designed incorporating with a 51-mum thick MgO substrate and a waveguide mixer mount with no back-short cavity. Detailed simulation results, junction fabrication process and junction I-V characteristics are described. Preliminary FTS (Fourier transform spectrometer) measurement results will also be discussed.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"24 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":"116743907","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: 3
Grain Boundary Layer Cermaic Single Layer chip Capacitor for Microwave Circuit 微波电路用晶界陶瓷单层片式电容器
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381432
Chengchao, Caiyang, Yangjunfeng, Fengyilong, Zhaohaifei
{"title":"Grain Boundary Layer Cermaic Single Layer chip Capacitor for Microwave Circuit","authors":"Chengchao, Caiyang, Yangjunfeng, Fengyilong, Zhaohaifei","doi":"10.1109/ICMMT.2007.381432","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381432","url":null,"abstract":"The relationship of the composition and properties of donor doping SrTiO3 semiconductor ceramic that sintered in the reducing atmosphere were studied. Through equivalent circuit analysis and XRD, SEM, we discussed the mechanism that grain boundaries effect and characteristics affected ceramic performance, which made the dielectric constant of grain boundary layer ceramic substrate for single layer chip capacitor are adjustable (10000~50000), and the capacitance change rate was low(lesplusmn4.7%~lesplusmn22%), and the adaptable temperature range was wide (-55degC~+125degC). By sputtering and electroplating, the ceramic substrates were plated electrode. By photolithography, corrosion and precision machining , the substrates with electrode were manufactured into general single layer chip capacitor, surface mounted single layer chip capacitor, multi-pad single layer chip capacitor and single layer chip capacitor array for microwave circuit.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"4 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":"114933432","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
Recent Advances of TWTCAD TWTCAD的最新进展
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381352
Li Liao, Zhonghai Yang, Bin Li, Jianqing Li, Xiaofang Zhu, Tao Huang, Q. Hu, Liyi Xiao, P. Gao, Yu-Lu Hu, GuoXian He
{"title":"Recent Advances of TWTCAD","authors":"Li Liao, Zhonghai Yang, Bin Li, Jianqing Li, Xiaofang Zhu, Tao Huang, Q. Hu, Liyi Xiao, P. Gao, Yu-Lu Hu, GuoXian He","doi":"10.1109/ICMMT.2007.381352","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381352","url":null,"abstract":"Recent advances of TWTCAD Integrated Framework, a 2D modeling and simulation code suite for traveling wave tube, will be presented. The use of the suite is more convenience, and the simulation result is more accurate. All modules of TWTCAD are improved. TWTCAD is applying and validating in microwave industry broadly.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"12 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":"115700267","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
Multi-finger power SiGe HBTs with non-uniform Spacing 非均匀间距的多指功率SiGe hbt
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381446
Jin Dong-yue, Zhang Wan-rong, Xie Hong-yun, Wang Yang
{"title":"Multi-finger power SiGe HBTs with non-uniform Spacing","authors":"Jin Dong-yue, Zhang Wan-rong, Xie Hong-yun, Wang Yang","doi":"10.1109/ICMMT.2007.381446","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381446","url":null,"abstract":"Based on a three-dimensional thermal-electrical model, non-uniform finger spacing power SiGe HBT was designed and fabricated. Experiment result shows that the peak temperature of non-uniform spacing SiGe HBT is Iowed by 22 K compared with that of uniform space HBT. For the same nonuniform spacing HBT, temperature non-uniformity among the fingers is improved obviously at different biases. The higher power dissipation PDC is, the better temperature improvement of non-uniform spacing HBT is. Because of the reducing of peak temperature, power SiGe HBTs with non-uniform Spacing can work at higher bias and has higher power handling capability.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"114 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":"116488650","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 recognition method depended on enlarge the difference between target and chaff 一种基于放大目标与箔条之间差异的识别方法
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381510
Xianhe Shao, Hai Du, Jinghong Xue
{"title":"A recognition method depended on enlarge the difference between target and chaff","authors":"Xianhe Shao, Hai Du, Jinghong Xue","doi":"10.1109/ICMMT.2007.381510","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381510","url":null,"abstract":"This paper proposed a target recognition method to distinguish ships from chaff by polarization information, aiming at fully polarized dual-channel radars with low resolution. The method expands the original single polarization radar system to dual polarization radar system with both left and right circular polarizations by receiving and processing the full polarization information of radar echoes. It recognize the target by taking advantage of the difference of the left and right circular depolarization characteristic parameters of the target and chaff in radar echoes, after enlarging the difference between the cross- polarization component and co-polarization component of the radar echoes involving both target and chaff, furthermore, non-linear polarization transformation is adopted to increase the chaff and targets respectively, and to improve the recognition rate in result. In the end, the recognition result is proved to be more desirable by processing information in polarization domain than in time and frequency domain.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"47 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":"123662085","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: 3
Design of Low-Phase-Noise Low-Phase-Error CMOS Quadrature VCO 低相位噪声低相位误差CMOS正交压控振荡器的设计
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381468
Hui Gao, Zhi-Qiang Lu, Feng-Chang Lai
{"title":"Design of Low-Phase-Noise Low-Phase-Error CMOS Quadrature VCO","authors":"Hui Gao, Zhi-Qiang Lu, Feng-Chang Lai","doi":"10.1109/ICMMT.2007.381468","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381468","url":null,"abstract":"Two 2.4 GHz LC quadrature voltage-controlled oscillators (QVCO) are designed. The advantages of the QVCO topologies are the characteristics of rather low phase error, while comparable phase noise is achieved. Phase noise of the two QVCOs are compared and analyzed. Simulation results show that phase noise improves 6.3 dBc/Hz in a so-called PS-QVCO (PMOS-serial-coupled QVCO) compared to NS-QVCO (NMOS- serial-coupled QVCO). The PS-QVCO shows the phase noise of -115.4 dBc/Hz at 600 KHz offset, while dissipating only 2.9 mW for the whole QVCO. The phase error between I and Q signals is at most 0.19deg.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"33 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":"123741579","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
Circuit Noise Effect on Sampling Clock in Software Radio IF Digitization 软件中频数字化中电路噪声对采样时钟的影响
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381413
Sun Lei, An Jianping, Wu Yanbo
{"title":"Circuit Noise Effect on Sampling Clock in Software Radio IF Digitization","authors":"Sun Lei, An Jianping, Wu Yanbo","doi":"10.1109/ICMMT.2007.381413","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381413","url":null,"abstract":"IF digitization generally requires high resolution of analog-to-digital conversion. The timing jitter is a key concern and it's widely investigated in the published literatures. However, most of the issues mainly focused on the clock jitter with white Gaussian noise only. This paper present a more realistic analog-to-digital conversion analysis model based on the actual circuit noise conditions, particularly investigating on the clock jitter error with the combination of Gauss distribution noise and circuit noise (interference). An analytical expression for the A/D conversion with the combined clock jitter error is developed. The computer simulations are presented, which showed excellent agreement with the developed expression. Also, a real experiment brings forth a comprehensive evaluation in IF digitization.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"102 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":"124149310","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
A Novel Multi-Channel Spatial Power Splitter 一种新型多通道空间功率分配器
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381451
Q. Chu, Ruibing Dong
{"title":"A Novel Multi-Channel Spatial Power Splitter","authors":"Q. Chu, Ruibing Dong","doi":"10.1109/ICMMT.2007.381451","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381451","url":null,"abstract":"A novel power splitter is presented in which power is spatially distributed within a waveguide using broadband low-loss transition array of E-plane integrated finlines. Two waveguide space power splitters are implemented: one is non-uniform power splitter based on the standard waveguide, the other is uniform power splitter based on the PBG (photonic bandgap) rectangular waveguide. The simulation results have showed the characteristic of these two power splitter.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"57 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":"122627721","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
A Triple-Band Monopole Antenna for Mobile Handsets and the Effect of the Handset Components 一种用于手机的三波段单极天线及手机元件的影响
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381267
Heng Deng, Zhenghe Feng
{"title":"A Triple-Band Monopole Antenna for Mobile Handsets and the Effect of the Handset Components","authors":"Heng Deng, Zhenghe Feng","doi":"10.1109/ICMMT.2007.381267","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381267","url":null,"abstract":"A compact monopole antenna operating at GSM (880- 960 MHz), GPS (center at 1575 MHz), and UMTS (1920-2170 MHz) bands is presented. With three folded meandering branches, the antenna covers the wireless communication bands of GSM, GPS and UMTS. The final antenna is formed by folding one print circuit board (PCB) on which the radiation branches are depicted. And the effect of the other parts in the handset is considered.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"135 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":"128917143","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
Theoretical Discussion of Doppler Frequency Shift Generated by Solar Zenith Angle 太阳天顶角产生多普勒频移的理论探讨
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381480
Zhang Yinghui, Wang Yizhuo
{"title":"Theoretical Discussion of Doppler Frequency Shift Generated by Solar Zenith Angle","authors":"Zhang Yinghui, Wang Yizhuo","doi":"10.1109/ICMMT.2007.381480","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381480","url":null,"abstract":"In this paper we presented theoretically the dependence relationship between the solar zenith angle and the height of some layer with some fixed electron concentration in the ionosphere and provided the equations used to calculate the Doppler frequency shift. On the base of the materials obtained through the up-to-date experiments we discussed the influence of the variation of the solar zenith angle to the Doppler frequency shift. The observed quantities well coincided with the theoretical values.These instructions give you basic guidelines for preparing papers for conference proceedings.","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":"130386833","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
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