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

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Application of Micro Genetic Algorithm to Optimization of Time-Domain Ultra-Wide Band Antenna Array 微遗传算法在时域超宽带天线阵优化中的应用
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381381
Yan-Ming Qin, C. Liao, Tao Wei
{"title":"Application of Micro Genetic Algorithm to Optimization of Time-Domain Ultra-Wide Band Antenna Array","authors":"Yan-Ming Qin, C. Liao, Tao Wei","doi":"10.1109/ICMMT.2007.381381","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381381","url":null,"abstract":"The application of antenna array is an effective way to improve the gain and directivity of ultra-wide band (UWB) antenna and reduce the side lobe. It is different from the traditional narrowband antenna based on frequency domain that the finite-difference time-domain method (FDTD) was used to make simulated analysis of a UWB TEM horn antenna in time domain. According to the principle of superposition, the information of time-domain radiated field of a 9-elements linear TEM horn array was then acquired and the universal characteristic of time-domain UWB antenna array was discussed. Combined with micro genetic algorithm (MGA), the energy pattern of linear array is optimized and a narrow beam-width is available, while the maximal side-lobe level of the array is limited.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122851784","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: 13
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":null,"pages":null},"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
Design of Triple-band Bandpass Filter Using Trn-section Stepped-Impedance Resonators 三频带带通滤波器的阶跃阻抗谐振器设计
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381479
X. Lin, Q. Chu
{"title":"Design of Triple-band Bandpass Filter Using Trn-section Stepped-Impedance Resonators","authors":"X. Lin, Q. Chu","doi":"10.1109/ICMMT.2007.381479","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381479","url":null,"abstract":"On the basis of tri-section stepped-impedance resonator (SIR), a novel triple-band bandpass filter (BPF) is presented, which has a triple-band feature of three passbands at desired frequencies and high out-of-band suppression. The new coupling scheme at the input and output can improve the performance of the BPF, and the hairpin structure helps to reduce the size. A microstrip filter was designed and simulated, proving the concept in an excellent way. The prototype of the BPF achieved insertion loss of 2.2, 1.8 and 1.7 dB at 1.0, 2.4, 3.6 GHz, respectively.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125141634","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: 56
Field Computation of Waveguide Loaded High Order Mode Output Cavity 波导加载高阶模输出腔的场计算
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381361
Wang Yong, Xie Jingxin
{"title":"Field Computation of Waveguide Loaded High Order Mode Output Cavity","authors":"Wang Yong, Xie Jingxin","doi":"10.1109/ICMMT.2007.381361","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381361","url":null,"abstract":"This paper describes a new numerical method based on the boundary element method (BEM) for the field computation of waveguide loaded high order mode output cavity (HMOC). A computer program is developed and the resonant frequency, external Q value and field distribution of a TM210 HMOC are computed. The results agree well with those of ISFEL3D.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126532073","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
Electromagnetic Scattering by a Homogeneous Sphere Located in a 2D on-axis Gaussian Beam 二维高斯光束中均匀球的电磁散射
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381388
Liu Haiying, Wu Zhensen
{"title":"Electromagnetic Scattering by a Homogeneous Sphere Located in a 2D on-axis Gaussian Beam","authors":"Liu Haiying, Wu Zhensen","doi":"10.1109/ICMMT.2007.381388","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381388","url":null,"abstract":"Studying on electromagnetic scattering by particles plays an important role in atmosphere monitoring, space remote sensing and some other fields. Scattering by a homogeneous sphere located in a 2D Gaussian beam is discussed in the paper. Expansions of cylindrical vector wave functions in terms of spherical ones are introduced simply. With the expansions, the beam coefficients in a spherical coordinates are obtained from the forms in cylindrical coordinates. For a homogeneous sphere, scattering coefficients in generalized Lorenz Mie theory are deduced in detail. According to the formula of scattering coefficients, scattering characteristic of a sphere in a 2D Gaussian beam can be analyzed.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128643642","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
10 GHz GaInP/GaAs HBT Injection-Locked Frequency Divider 10ghz GaInP/GaAs HBT注入锁定分频器
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381437
H. Wei, C. Meng, YuWen Chang, G. Huang
{"title":"10 GHz GaInP/GaAs HBT Injection-Locked Frequency Divider","authors":"H. Wei, C. Meng, YuWen Chang, G. Huang","doi":"10.1109/ICMMT.2007.381437","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381437","url":null,"abstract":"The first integrated GaInP/GaAs heterojunction bipolar transistor (HBT) injection-locked frequency divider (ILFD) with the stacked transformers is demonstrated at 9.60-10.38 GHz. The stacked transformers formed by only two metal layers provide the inductive coupling in the cross feedback and separate biasing for base and collector to allow for the larger voltage swing in the LC tank and increasing locking range. Under the supply voltage of 5 V and core power consumption of 20.5 mW, the locking range is up to 7.8% of the center operating frequency. Compared to other high frequency ILFDs employing a current source as signal injector, the design has a good performance in locking range. The chip size is 1.0 mm times 1.0 mm.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124975741","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 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":null,"pages":null},"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
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":null,"pages":null},"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
Design and emissivity meterage of 3mm microwave blackbody 3mm微波黑体的设计与发射率测量
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381365
Cheng Chun-yue, Wang Qiang, Xu De-zhong, Chen Yun-mei
{"title":"Design and emissivity meterage of 3mm microwave blackbody","authors":"Cheng Chun-yue, Wang Qiang, Xu De-zhong, Chen Yun-mei","doi":"10.1109/ICMMT.2007.381365","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381365","url":null,"abstract":"The configuration design and the meterage data of 3 mm microwave blackbody are presented. The blackbody can be used in 75 GHz to 110 GHz or higher frequency and its emissivity is more than 0.996. Because the emissivity of microwave blackbody is close to one, namely its reflectance almost equals zero, the directivity error of directional coupler and the antenna reflection will make it is difficult to measure the emissivity directly. Hence, we use the space reflection method of moving DUT to measure reflectance of microwave blackbody. In this method, the reflectance of measurement system is equivalent to a big stationary wave and the reflectance of black body is equivalent to a small stationary wave. By using moving blackbody, we can separate the two stationary waves. The emissivity of blackbody is given by friis formula including some near field parameters. The measurement results are presented in section 5.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116396663","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
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":null,"pages":null},"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
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