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

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Low Cost Microstrip Subharmonic Mixer in Millimeter Wave Band 毫米波低成本微带次谐波混频器
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381329
Mengjuan Zhao, Xiaotao Zu, Jian Huang
{"title":"Low Cost Microstrip Subharmonic Mixer in Millimeter Wave Band","authors":"Mengjuan Zhao, Xiaotao Zu, Jian Huang","doi":"10.1109/ICMMT.2007.381329","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381329","url":null,"abstract":"This paper describes the design and simulation of a millimeter fourth subharmonic mixer using an antiparallel diode pair for a down converter, which was specifically designed for low cost with minimal sacrifice in performance. The component is designed to operate at RF frequentcies of 92-96 GHz, IF frequency of 70 MHz. The microstrip subharmonic mixer with good recovery circuit and a novel RF filter has conversion loss of 12.8 dB-14 dB with 8 dbm LO power and shows significant improvement compared with previously reported microstrip fourth harmonic results.","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":"131757413","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
An improved design of microstrip Archimedeam spiral antenna 微带阿基米德螺旋天线的改进设计
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381304
S. Zhaohui, Li Meijia, Di Zhiyong
{"title":"An improved design of microstrip Archimedeam spiral antenna","authors":"S. Zhaohui, Li Meijia, Di Zhiyong","doi":"10.1109/ICMMT.2007.381304","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381304","url":null,"abstract":"The characteristic of one-side radiation is always required in the application of ultra-wideband spiral antenna. Microstrip Archimedean spiral antenna can be achieved by traditional Archimedean spiral antenna with a dielectric-slab and a mental ground plane. This method could increase the gain of the antenna. However, the main lobe splits at the higher frequency band. A hollow dielectric structure is also designed in the paper. The operation band of the microstrip Archimedean spiral antenna could be increased through the structure according to the simulation and the measured results.","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":"116579523","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: 8
Microwave Modeling Using Artificial Neural Networks and Applications to Embedded Passive Modeling 基于人工神经网络的微波建模及其在嵌入式被动建模中的应用
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381409
Q. Zhang, L. Ton, Y. Cao
{"title":"Microwave Modeling Using Artificial Neural Networks and Applications to Embedded Passive Modeling","authors":"Q. Zhang, L. Ton, Y. Cao","doi":"10.1109/ICMMT.2007.381409","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381409","url":null,"abstract":"In this paper, artificial neural network (ANN) approaches to modeling of high-frequency effects of embedded passives in multi-layer printed circuits are presented. Recently developed automatic model generation (AMG) methods for efficient training of ANN models are described, allowing ANN models to automatically learn from electromegnetic (EM) behavior of embedded resistors and capacitors. Through fast and accurate EM-based neural models, we enbable consideration of EM effects in high-frequency and high-speed computer-aided design (CAD), including component's geometrical/physical parameters as optimization variables. Demonstration examples including geometrical/physical-orientated neural models of embedded capacitors and resistors are presented.","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":"114953747","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
Using Frequency Hypsography to Deduce Doppler Frequency Shift and Phase Path 利用频率地形图推导多普勒频移和相程
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381336
C. Jixiang
{"title":"Using Frequency Hypsography to Deduce Doppler Frequency Shift and Phase Path","authors":"C. Jixiang","doi":"10.1109/ICMMT.2007.381336","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381336","url":null,"abstract":"This paper presents a new method- using frequency hypsography to calculate Doppler shift and phase path. Formula deduced from this method can avoid some unbelievable factors that are produced from hypotheses on not only parameter of ionosphere but also model of electronic density distribution. And this formula can also explain \"C\" trace occurring on HF-Doppler records.","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":"129759893","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
Compact Combline Bandpass Filter Using LTCC Technology 采用LTCC技术的紧凑型组合带通滤波器
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381402
Tao Yang, R. Xu, Lan Xiao
{"title":"Compact Combline Bandpass Filter Using LTCC Technology","authors":"Tao Yang, R. Xu, Lan Xiao","doi":"10.1109/ICMMT.2007.381402","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381402","url":null,"abstract":"A compact combline bandpass filter structure using low temperature co-fired ceramic (LTCC) technology is proposed. The lumped capacitance in traditional combline filter structure is changed to distributed capacitance realized by parallel coupled striplines in this structure. Combline filter with this structure can be constructed more easily and more compactly. A bandpass filter with this structure is designed in this paper. The simulation response exhibits an insertion loss of 1.9 dB,a return loss of 20 dB, and a relative band width of 8% with the center frequency at 9.6 GHz. The suppression at 8.4 GHz and 10.8 GHz is larger than 39 dB.","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":"129959451","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
Study on coaxial line to rectangular waveguide junction for high power microwave transmission 大功率微波传输中同轴-矩形波导结的研究
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381440
Fu-min Lin, Tian-hao Guan
{"title":"Study on coaxial line to rectangular waveguide junction for high power microwave transmission","authors":"Fu-min Lin, Tian-hao Guan","doi":"10.1109/ICMMT.2007.381440","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381440","url":null,"abstract":"A coaxial line to rectangular waveguide junction without dielectric for high power microwave transmission is designed by improving the structure of doorknob type window. The passband of the junction through which the stand wave ratio is smaller than 1.1, is 1352 MHz ~ 1412 MHz. The junction may couple with a stage of coaxial line filter or rectangular waveguide filter to form a multistage filter which can be used in output circuits of broadband klystrons or other broadband high power microwave devices.","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":"132933259","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 X-Band Transmitter For Small Satellites 小型卫星用x波段发射机
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381506
L. Xianfeng, Geng Hao, Jiang Yaxiang, Xie Chunjian, C. Xiaomin, Sun Huixian
{"title":"An X-Band Transmitter For Small Satellites","authors":"L. Xianfeng, Geng Hao, Jiang Yaxiang, Xie Chunjian, C. Xiaomin, Sun Huixian","doi":"10.1109/ICMMT.2007.381506","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381506","url":null,"abstract":"An X-band QPSK transmitter designed for data rates up to 150 Mbps for small satellites with power, mass and size constraints is described in this paper. A direct modulation method where the baseband data directly modulate the X-band carrier is applied to the development of the X-band transmitter. This method can reduce the complexity and size of the hardware. 14 W (41.5 dBm) RF output power of the X-band transmitter at 8.2 GHz center frequency is obtained by a solid state power amplifier (SSPA).","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":"134274735","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
Mixed-Mode Simulation of the MMIC Using Unconditionally Stable Pseudospectral Time-Domain Method 基于无条件稳定伪谱时域方法的MMIC混合模仿真
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381382
Hong-xing Zheng, Li-Qiang Wang, L. Feng, F. Gao
{"title":"Mixed-Mode Simulation of the MMIC Using Unconditionally Stable Pseudospectral Time-Domain Method","authors":"Hong-xing Zheng, Li-Qiang Wang, L. Feng, F. Gao","doi":"10.1109/ICMMT.2007.381382","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381382","url":null,"abstract":"This paper illustrates the application of an alternating direction implicit (ADI) technique for the pseudospectral time-domain (PSTD) algorithm. A lumped element finite-difference time-domain (FDTD) simulator is developed to the wide-band modeling of microwave and millimeter wave integrated circuit. Three-dimensional ADI- PSTD scheme is adopted to describe the circuit passive part, whereas numerical device simulation techniques are employed for the active semiconductor devices. To achieve very accurate results, the short-open calibration technique has been modeled the interconnections. The resulting scheme allows for accurate mixed-mode simulation, which inherently accounts for propagation and radiative effects. Comparisons with the FDTD approach and an approach based on strong splitting demonstrate the potential of the method to substantially reduce the cost of simulating linear waves in dispersive materials.","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":"134464230","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
The Modeling and Analysis for Autonomous Navigation System Based on Tightly Coupled GPS/INS 基于GPS/INS紧密耦合的自主导航系统建模与分析
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381501
W. Lijun, Xiaoniu Yang, Huichang Zhao
{"title":"The Modeling and Analysis for Autonomous Navigation System Based on Tightly Coupled GPS/INS","authors":"W. Lijun, Xiaoniu Yang, Huichang Zhao","doi":"10.1109/ICMMT.2007.381501","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381501","url":null,"abstract":"GPS can provide both military and private users with accurate information about user position and velocity. However its data rate is low as well as 1~10Hz, and it will not provide a continuous and reliable information among mountains, dense forests and high building. Inertial Navigation System (INS) is an autonomous, all-weather navigation system that can provide continuous information of position, velocity and attitude regardless of the surrounding. But the performance of INS deteriorates with time due to inertial sensor performance. GPS and INS have complementary properties, whose integration is an efficient way of improving the whole performance of navigation system. In this paper, the models of GPS and INS, respectively, are built and analyzed, and then a tightly coupled GPS/INS system based on the information of GPS position and velocity is modeled and simulated, which is compared with integrated system using only GPS position data. The simulation and analysis results demonstrate that integrated system can greatly enhance the robustness and reliability of autonomous navigation system.","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":"132034264","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
Simulation of Thermal Characteristics for Helical Slow-Wave Circuit of TWT 行波管螺旋慢波电路热特性仿真
2007 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2007-04-18 DOI: 10.1109/ICMMT.2007.381439
L. Yao, Zhonghai Yang, Z. Huo, Xiaofang Zhu, Bin Li
{"title":"Simulation of Thermal Characteristics for Helical Slow-Wave Circuit of TWT","authors":"L. Yao, Zhonghai Yang, Z. Huo, Xiaofang Zhu, Bin Li","doi":"10.1109/ICMMT.2007.381439","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381439","url":null,"abstract":"A simulated model has been established to calculate the temperature of helical slow-wave circuits accurately. The Finite Element Method software ANSYS was used to analyze the thermal distortion of the helical slow-wave circuit of TWT. The thermal analysis results show the thermal stress makes helical tape concave at the positions contacting with rods and convex at the part between the two rods, and the expansion of the helical tape width and thickness are very small and could be ignored. The effect of thermal strain in helical slow-wave circuit on TWT cold-test characteristics was analyzed in detail. The quasi-periodic boundary conditions in the computer code MAFIA was employed to determine the effect on dispersion and on-axis interaction impedance of helical slow-wave circuit. With the helix temperature getting higher, the phase velocity decreases obviously and the interaction impedance varieties slightly.","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":"132350596","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
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