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700W Long Pulse UHF SiC Transistor for Radar Applications 雷达用700W长脉冲超高频碳化硅晶体管
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751618
L. Leverich, T. Shi, M. Mallinger, Jerry Chang, C. Leader
{"title":"700W Long Pulse UHF SiC Transistor for Radar Applications","authors":"L. Leverich, T. Shi, M. Mallinger, Jerry Chang, C. Leader","doi":"10.1109/EUMC.2008.4751618","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751618","url":null,"abstract":"The performance of a 700 Watt SiC SIT device using state of the art silicon carbide technology is described. Operating under pulsed RF conditions of 1mS pulse width, 20% duty cycle, it can deliver 700 Watts peak power at 96 volts. More than 50% efficiency and 8.2 dB gain are attained over the bandwidth of 400-450 MHz. The power density is 1.9 watts/mil. Thermal resistance is 0.19degC/W. The junction temperature remains below 150degC at a flange temperature of 70degC. This combination of high power density and high voltage operation makes these new generation devices ideally suited for new transmitter designs in UHF radar systems.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131233402","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
94 GHz Waveguide VCO with Magic_T for FMCW radar 用于FMCW雷达的带有Magic_T的94ghz波导VCO
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751684
D. Ko, S. Moon, M.K. Lee, S. Lee, D. Ko, S. Bang, Y. Baek, M. Han, S. Choi, T. Baek, S. Kim, J. Rhee
{"title":"94 GHz Waveguide VCO with Magic_T for FMCW radar","authors":"D. Ko, S. Moon, M.K. Lee, S. Lee, D. Ko, S. Bang, Y. Baek, M. Han, S. Choi, T. Baek, S. Kim, J. Rhee","doi":"10.1109/EUMC.2008.4751684","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751684","url":null,"abstract":"In this paper, we have designed and fabricated the waveguide voltage controlled oscillator (VCO) at 94 GHz, which consists of a GaAs Gunn diode, a varactor diode, and two bias posts with low pass filter (LPF), and a Magic Tee for FMCW radar. The cavity is designed for a fundamental mode at 47 GHz and operated at second harmonic of 94 GHz center frequency. The fabricated VCO has 640 MHz bandwidth, 505 MHz linearity with 2%. The VCO operates at 93.9 GHz with phase noise of -102.79 dBc/Hz at 1 MHz offset and power of 11.34 dBm. The W-band VCO has phase noise better than -100 dBc/Hz.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131253098","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: 10
RF, DC, and reliability characteristics of Ta2O5 MIM capacitors Ta2O5 MIM电容器的射频、直流和可靠性特性
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751404
M. Richard, T. Dean, S. Delage
{"title":"RF, DC, and reliability characteristics of Ta2O5 MIM capacitors","authors":"M. Richard, T. Dean, S. Delage","doi":"10.1109/EUMC.2008.4751404","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751404","url":null,"abstract":"We present here the fabrication, the characterization, the reliability and the modeling of MIM capacitors using Ta2O5 as a dielectric. Leakage current of 3 mA/cm2 at 4 MV/cm, a breakdown field (Ebd) of 5.2 MV/cm and a capacitance density of 0.83 fF/mum2 have been obtained. For high temperature, current instability has been observed and has been attributed to ionic diffusion in dielectric and follows the space-charge-limited theory. This phenomenon increases dramatically the TDDB (Time Dependent Dielectric Breakdown) which is a key aspect for our applications.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"189 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127317760","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
Broadband Back-End Module for Radio-Astronomy Applications in the Ka-Band ka波段射电天文学应用的宽带后端模块
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751653
J. Cano, B. Aja, E. Villa, L. de la Fuente, E. Artal
{"title":"Broadband Back-End Module for Radio-Astronomy Applications in the Ka-Band","authors":"J. Cano, B. Aja, E. Villa, L. de la Fuente, E. Artal","doi":"10.1109/EUMC.2008.4751653","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751653","url":null,"abstract":"This paper presents the design, simulation and measurement of a broadband back-end module (BEM) for radio-astronomy applications in the Ka-band. It is a direct conversion receiver based on low noise amplification, band pass filtering and Schottky diode detection. System simulations are based on individual linear-subsystems S-parameters measurements together with non-linear detector model. Measurements show more than 30 dB of RF gain over the 26 to 36 GHz band with a noise figure below 3.9 dB. Detected voltage is in the range 1-10 mV which meets the application specifications.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128010730","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
Numerical Analysis of the Electric Field Distribution within Complex Cell Structures 复杂细胞结构内电场分布的数值分析
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751393
C. Pelletti, A. Monorchio, A. Rogovich
{"title":"Numerical Analysis of the Electric Field Distribution within Complex Cell Structures","authors":"C. Pelletti, A. Monorchio, A. Rogovich","doi":"10.1109/EUMC.2008.4751393","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751393","url":null,"abstract":"This paper shows the importance of using realistic cell shapes with the proper geometry and orientation to study the mechanism of direct cellular effects from RF exposure. For this purpose, the electric field distribution is computed, using the FDTD technique, in realistic cell models exposed to a linearly polarized plane wave of frequencies 900 MHz and 2.45 GHz. Furthermore, an insight on the mutual interactions between erythrocyte cell models shows that polarizing effects significantly affect the values of field intensity within the cell.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128123347","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
Efficient Design of a Compact Wideband EBG Filter for Active Integrated Antennas 用于有源集成天线的紧凑型宽带EBG滤波器的高效设计
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751566
P. Baccarelli, P. Burghignoli, F. Frezza, A. Galli, P. Lampariello, S. Paulotto, G. Valério
{"title":"Efficient Design of a Compact Wideband EBG Filter for Active Integrated Antennas","authors":"P. Baccarelli, P. Burghignoli, F. Frezza, A. Galli, P. Lampariello, S. Paulotto, G. Valério","doi":"10.1109/EUMC.2008.4751566","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751566","url":null,"abstract":"In this work an efficient numerical approach, based on a suitable full-wave unit-cell analysis of arbitrarily-shaped printed structures, is applied to accurately characterize Electromagnetic BandGap (EBG) filters able to improve performance in Active Integrated Antennas (AIAs). In particular, a precise control of impedance values is obtained for harmonic tuning by means of properly designed tapered microstrip-line elements. A synthesis procedure for a microwave transmitter with specific constraints is thoroughly carried out, which emphasizes the accuracy and efficiency of this technique.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132734665","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 Linearly Tapered Slot-line Antenna's Array for Quasi-terahertz Molecular Spectroscopy 准太赫兹分子光谱线性锥形槽线天线阵列的设计
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751705
Z. Lukeš, V. Otevrel, J. Lacik, Z. Raida
{"title":"Design of Linearly Tapered Slot-line Antenna's Array for Quasi-terahertz Molecular Spectroscopy","authors":"Z. Lukeš, V. Otevrel, J. Lacik, Z. Raida","doi":"10.1109/EUMC.2008.4751705","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751705","url":null,"abstract":"This presented paper deals with the novel design of the Linearly Tapered Slot-line Antenna's (LTSA) array for the Quasi-terahertz Molecular Spectroscopy application. Antenna array was designed for frequency range from 50 GHz to 600 GHz. The antenna is placed on a low lost dielectrically substrate Cuclad 217. The numerical model was analyzed in a EM solver CST Microwave Studio. After basic design, the antenna was optimized by own novel modification of SPC-PNX real-coded genetic algorithm. The wideband global optimization by SPC-PNX genetic algorithm of the broadband antenna for the mm-Band can be interpreted as original results.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133327186","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
W-Band Characterization of Anisotropic Liquid Crystals at Room Temperature 室温下各向异性液晶的w波段特性
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751402
S. Mueller, M. Koeberle, F. Goelden,, A. Penirschke, A. Gaebler, A. Lapanik, W. Haase, R. Jakoby
{"title":"W-Band Characterization of Anisotropic Liquid Crystals at Room Temperature","authors":"S. Mueller, M. Koeberle, F. Goelden,, A. Penirschke, A. Gaebler, A. Lapanik, W. Haase, R. Jakoby","doi":"10.1109/EUMC.2008.4751402","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751402","url":null,"abstract":"This paper describes the characterization of Liquid Crystals (LCs) at W-Band using the standard WR-10 rectangular waveguide. The reflection parameter of a 10 mm long waveguide - terminated by a short-circuit - is measured. The LC is oriented with a homogeneous magnetostatic field strength of 400 A/mm, generated with an air-cooled coil. The extracted complex permittivity of the LC K15 from Merck KgaA (also known as 5CB) is presented, showing permittivities well below 3 with a dielectric anisotropy of Deltaepsiv<0.19 (equivalent to tau=Deltaepsiv/epsivmax<8.5%) and dielectric losses less than tandelta<0.023, all at W-Band.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133497200","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: 18
Computational Techniques for Antenna Engineering 天线工程计算技术
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751579
Anton G. Tijhuis, M. C. Beurden, B. P. D. Hon
{"title":"Computational Techniques for Antenna Engineering","authors":"Anton G. Tijhuis, M. C. Beurden, B. P. D. Hon","doi":"10.1109/EUMC.2008.4751579","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751579","url":null,"abstract":"In this paper, a two-stage approach is proposed for using computational electromagnetics in antenna engineering. First, stochastic optimization techniques are used in combination with approximate models. Second, line-search techniques are combined with full-wave modeling. The second stage is considered in detail; both the acceleration of the underlying field computations and the implementation of the optimization are discussed.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133604114","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
Quarter-Wave Stepped-Impedance Resonator Filters with Quadruplet and Canonical Form Responses 四重态和正则型响应的四分之一波阶进阻抗谐振器滤波器
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751499
Jhe-Ching Lu, Chi-Yang Chang
{"title":"Quarter-Wave Stepped-Impedance Resonator Filters with Quadruplet and Canonical Form Responses","authors":"Jhe-Ching Lu, Chi-Yang Chang","doi":"10.1109/EUMC.2008.4751499","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751499","url":null,"abstract":"In this paper, compact microstrip quarter-wave stepped-impedance resonator (SIR) bandpass filters with quadruplet and canonical form responses are proposed. The proposed quadruplet filter can be designed to have a pair of transmission zeros to achieve sharp selectivity. In addition, by applying an extra source-load coupling, two additional transmission zeros on both side of passband are created to further enhance the selectivity. Because the quarter-wave SIRs are adopted, the circuit size of the filters can be largely reduced and the upper stopband can be extended. Two generalized Chebyshev filters corresponding to quadruplet and canonical form coupling schemes are fabricated. Simulated and measured results are matched very well.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134053359","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
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