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ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.最新文献

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Numerical simulation of the two-stage gyroklystron amplifier 两级回旋速调管放大器的数值模拟
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411518
Z. Geng, Pu-kun Liu, Yun-feng Jia
{"title":"Numerical simulation of the two-stage gyroklystron amplifier","authors":"Z. Geng, Pu-kun Liu, Yun-feng Jia","doi":"10.1109/ICMMT.2004.1411518","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411518","url":null,"abstract":"In this paper, the beam-wave interaction in the two-stage fundamental gyroklystron amplifier was studied by using the self-consistent nonlinear simulation code. We studied the effect of different parameters including the drift tube length, guiding center radius and velocity pitch ratio on the electron efficiency.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126249305","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 DMTL MEMS phase shifter 一种新型DMTL MEMS移相器
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411590
Jianzhong Lou, Zhengping Zhao, Yang Ruixia, Miao Lu, Xiaodong Hu
{"title":"A novel DMTL MEMS phase shifter","authors":"Jianzhong Lou, Zhengping Zhao, Yang Ruixia, Miao Lu, Xiaodong Hu","doi":"10.1109/ICMMT.2004.1411590","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411590","url":null,"abstract":"This paper results for one bit DMTL phase shifter that are designed to operate from 8-32GHz on high resistivity silicon. The periodically loaded capacitor used 4 MEMS bridges that suspended on CPW transmission line. Actuation voltage is applied between bridge and CPW transmission line. The phase shifter result in a insertion loss/return loss is better than -1.0dB/-15dB from 10.5 to 30 GHz and phase shifts of 21.1/spl deg/ at 15 GHz, and 44.3/spl deg/ at 30 GHz.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"84 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127982345","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 injection locked oscillator for direction-conversion BPSK modulation applications 用于方向转换BPSK调制应用的注入锁定振荡器
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411593
G. Wen, Fuzhen Xie, Peng Ge, Jiayin Li, Jian Zhang
{"title":"An injection locked oscillator for direction-conversion BPSK modulation applications","authors":"G. Wen, Fuzhen Xie, Peng Ge, Jiayin Li, Jian Zhang","doi":"10.1109/ICMMT.2004.1411593","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411593","url":null,"abstract":"A microwave binary phase shift keying (BPSK) modulation method is presented in the paper. An injection locked oscillator (ILO) operating in 5.8GHz ISM band is developed to demonstrate the approach using hybrid integrated microwave circuit technique. The developed ILO showed the free-running performance with an output power of 2.67dBm at 5.8GHz, DC-to-RF efficiency of 26.6% and phase noise of -116.8dBc/Hz at 100kHz offset under dc bias of 1.881V and 3.69mA. Under the locked state by a 5.8GHz injection signal of -25dBm, the ILO acquired the output signal phase-shift of 180/spl deg/ with 27.67dB locking-gain by altering the dc bias. The experimental results shown the exact anti-phase output signals from the ILO are achievable in the frequency range from 5.795GHz to 5.805GHz by modulating the dc bias under the locked state by the corresponding locking signal of -25dBm. As a sequence, the ILO can function as a direct-conversion BPSK modulator.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121723304","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
Design algorithm of multi-segment dielectric resonator antennas (MSDRA) 多段介质谐振器天线(MSDRA)设计算法
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411478
A. Rashidian, K. Forooraghi, M. Tayefeh
{"title":"Design algorithm of multi-segment dielectric resonator antennas (MSDRA)","authors":"A. Rashidian, K. Forooraghi, M. Tayefeh","doi":"10.1109/ICMMT.2004.1411478","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411478","url":null,"abstract":"This paper introduces a simple design algorithm for MSDRAs. The algorithm avoids prior time consuming trial and error processes for achieving the optimum parameters of MSDRA and gives an antenna with best possible impedance bandwidth in desired feedline-MSDRA coupling. To show the efficiency of the algorithm, two examples are examined in X-band. The examples are simulated using two numerical methods. Then adjusting the position of the MSDRA with respect to the open end of the microstrip line is proposed to maximize the feedline-MSDRA coupling.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115750788","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
A combined algorithm both for restraining intensive interferences and for weak signals DOA estimation 一种抑制强干扰和微弱信号DOA估计的组合算法
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411508
Chai Li-gong, Luo Jing-qing
{"title":"A combined algorithm both for restraining intensive interferences and for weak signals DOA estimation","authors":"Chai Li-gong, Luo Jing-qing","doi":"10.1109/ICMMT.2004.1411508","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411508","url":null,"abstract":"Under the circumstance of intensive interferences, the detection probability of weak signals and the precision for their DOA estimation would be decreased seriously. A combined algorithm both for anti-jamming and DOA estimation is achieved based on the least mean-square error criterion in this paper. Finally, the results are analyzed theoretically. Computer simulations show its efficiency.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115900902","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
Modal analysis of coupled cavity waveguides using lattice sums technique 用格和技术分析耦合腔波导的模态
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411637
H. Jia, K. Yasumoto
{"title":"Modal analysis of coupled cavity waveguides using lattice sums technique","authors":"H. Jia, K. Yasumoto","doi":"10.1109/ICMMT.2004.1411637","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411637","url":null,"abstract":"A rigorous approach for modal analysis of coupled cavity waveguides (CCW) in 2D photonic crystals is presented. The mode propagation constants and the mode field profiles can be accurately derived by a simple matrix calculus, using a one-dimensional lattice sums, a T-matrix of an isolated circular cylinder, and generalized reflection matrices. Numerical examples have confirmed that the convergence of numerical solutions is very fast and their accuracy is very high.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":" 477","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131977667","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
Performance evaluation of coded M-ary orthogonal modulation 编码m正交调制的性能评价
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411672
Zhang Yuheng, Cheng Yunpeng, Shen Liang
{"title":"Performance evaluation of coded M-ary orthogonal modulation","authors":"Zhang Yuheng, Cheng Yunpeng, Shen Liang","doi":"10.1109/ICMMT.2004.1411672","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411672","url":null,"abstract":"In this paper, the performances of different coded M-ary orthogonal modulation are simulated and evaluated on the basis of the soft bits output of M-ary orthogonal modulation. The simulation results show that, compared with binary convolutional codes and Turbo codes, nonbinary dual-k codes can be regarded as a tradeoff among bit error rate (BER), computations and decoding time delay, and it can be applied to M-ary orthogonal modulation systems.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132041405","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
Temperature rise in the human head and brain for portable handsets at 900 and 1800 便携式手机的头部和大脑温度在900和1800时升高
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411692
Sooman Park, Juyoung Jeong, Yeongseog Lim
{"title":"Temperature rise in the human head and brain for portable handsets at 900 and 1800","authors":"Sooman Park, Juyoung Jeong, Yeongseog Lim","doi":"10.1109/ICMMT.2004.1411692","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411692","url":null,"abstract":"The purpose of this paper is to calculate temperature rises in an anatomically based model of the human head and brain for handset antenna at 900 and 1800 MHz. The specific absorption rate (SAR) is initially calculated with the use of the finite-difference time-domain (FDTD) method. The temperature rises in the human head and brain are then calculated by substituting the SAR into the bio-heat equation. The steady-state maximum temperature rises in the head and brain are determined through linear extrapolation of the peak average SAR. The averaged 1 g peak SARs in the head model are 1.590 W/kg at 900 MHz and 1.515 W/kg at 1800 MHz. The maximum temperature rises are 0.160 /spl deg/C in the head and 0.054 /spl deg/C in the brain at 900 MHz and 0.124 /spl deg/C, 0.044 /spl deg/C at 1800 MHz. Computed results show higher temperature elevation is obtained at 900 MHz in comparison to 1800 MHz and temperature increases rapidly within 3 min of phone time. In addition, after 7-8 minutes of phone time it reaches about 90 % of steady-state value and the steady-state condition in 30 minutes.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131471694","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
Application of entropy minimization to motion compensation of MMW Costas frequency-hopping radar 熵最小化在毫米波Costas跳频雷达运动补偿中的应用
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411610
L. Jing, Li Xing-guo, Liao Yue-hua
{"title":"Application of entropy minimization to motion compensation of MMW Costas frequency-hopping radar","authors":"L. Jing, Li Xing-guo, Liao Yue-hua","doi":"10.1109/ICMMT.2004.1411610","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411610","url":null,"abstract":"The Doppler performance of MMW Costas frequency-hopping (FH) radar was analyzed briefly. By defining waveform entropy for the 1D range profile of this radar, motion compensation was converted into a 1D optimization problem. Based on simulated annealing algorithm (SAA), a 1D search algorithm was presented and applied to motion compensation of Costas FH radar. Simulations show that this method is robust and globe. Satisfying results can be obtained even in the low-SNR case.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130793509","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
Passive location of maneuvering target by single station with non-cooperative illuminators 机动目标单站非合作照明器被动定位
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411505
Wang Jiegui, Luo Jingqing, Chen Ting
{"title":"Passive location of maneuvering target by single station with non-cooperative illuminators","authors":"Wang Jiegui, Luo Jingqing, Chen Ting","doi":"10.1109/ICMMT.2004.1411505","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411505","url":null,"abstract":"Based on the time difference of arrival (TDOA) and the direction of arrival (DOA) of the non-cooperative illuminators, the interacting multiple-model (IMM) algorithm for passive location of maneuvering target by single fixed station is proposed in this paper. The maneuvering model and the measurement equation are built and the location principle with IMM algorithm is discussed. With the help of computer simulation, the proposed method is proven to be practicable and effective.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131088691","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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