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2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)最新文献

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A 240 W push-pull GaAs power FET for W-CDMA base stations 用于W- cdma基站的240w推挽式GaAs功率场效应管
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.862310
K. Inoue, K. Ebihara, H. Haematsu, T. Igarashi, H. Takahashi, J. Fukaya
{"title":"A 240 W push-pull GaAs power FET for W-CDMA base stations","authors":"K. Inoue, K. Ebihara, H. Haematsu, T. Igarashi, H. Takahashi, J. Fukaya","doi":"10.1109/MWSYM.2000.862310","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862310","url":null,"abstract":"A 240 W power FET for cellular base stations of a next generation system has been developed. The FET consists of four 60 W chips, which were fabricated by using our high efficiency and low distortion device technique, combined in a push-pull configuration. The developed FET achieved 240 W (53.8 dBm) output power, 11.2 dB linear gain and 54% power-added efficiency at 2.14 GHz. This is the highest output power device using GaAs FET technology.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129923293","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: 20
Reconstruction of permittivity profiles in cylindrical objects illuminated by higher order modes 高阶模照射圆柱形物体的介电常数曲线重建
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.863545
Mohammad Jaleel Akhtar, Abbas Omar
{"title":"Reconstruction of permittivity profiles in cylindrical objects illuminated by higher order modes","authors":"Mohammad Jaleel Akhtar, Abbas Omar","doi":"10.1109/MWSYM.2000.863545","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.863545","url":null,"abstract":"An improved and accurate technique for the reconstruction of radially dependent permittivity profiles in cylindrical objects illuminated by higher order TE- and TM- cylindrical modes is presented. The technique is based on a general kind of integral transform of the measured frequency dependent reflection data and the recently suggested renormalization technique to obtain a unique solution of the corresponding inverse problem. A dummy time variable has been introduced to improve the overall reconstruction process. This variable has then been transformed into the spatial one via a simple integration routine. A number of reconstruction examples have been considered and a very good agreement has been found between the original and the reconstructed profiles even for very high values of permittivity.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129011550","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
Modeling single- and multi-carrier performance of a helix TWTA with the 1-D parametric code, CHRISTINE 用一维参数编码对螺旋TWTA的单载波和多载波性能进行建模
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.862312
D. Abe, M. Ngo, B. Levush, T. Antonsen, B. Danly, D. Chernin
{"title":"Modeling single- and multi-carrier performance of a helix TWTA with the 1-D parametric code, CHRISTINE","authors":"D. Abe, M. Ngo, B. Levush, T. Antonsen, B. Danly, D. Chernin","doi":"10.1109/MWSYM.2000.862312","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862312","url":null,"abstract":"CHRISTINE is a multi-frequency large-signal helix TWT code. Code predictions are compared with data from an L-band TWT; in general, the model and data agree to better than 1 dB, demonstrating the code to be a useful tool for TWT design and the development of external linearization techniques.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129137241","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
Optical distribution of local oscillators for a rotating antenna 旋转天线本振子的光分布
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.863588
M. Bibey, S. Formont, F. Deborgies, C. Moronvalle, G. Auvray, A. Brillman
{"title":"Optical distribution of local oscillators for a rotating antenna","authors":"M. Bibey, S. Formont, F. Deborgies, C. Moronvalle, G. Auvray, A. Brillman","doi":"10.1109/MWSYM.2000.863588","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.863588","url":null,"abstract":"Optical LO distribution to a rotating antenna has been studied. An optical demonstrator has been built with four microwave links and one optical digital link. Signals at different wavelengths are travelling in both directions along the same optical fibre. Measurements of additive phase noise show that the required specifications in S- and C-band can be reached: -135 dBc/Hz at 10 kHz offset. Electric isolation between channels and optical feedback inducing degradation of phase noise have also been studied and solutions have been proposed to improve these parameters.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130615388","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
Measurement of a DSB modulated RF signal by use of discriminating filters and envelope detection 用鉴别滤波器和包络检测测量DSB调制射频信号
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.862346
A. Barel, Y. Rolain
{"title":"Measurement of a DSB modulated RF signal by use of discriminating filters and envelope detection","authors":"A. Barel, Y. Rolain","doi":"10.1109/MWSYM.2000.862346","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862346","url":null,"abstract":"This paper proposes a method to measure the amplitude and the phase of the spectral tones present in both sidebands of a microwave amplitude modulated RF signal. The method exploits once more the phase conservation property inherent to the frequency down conversion operation performed by an envelope detection circuit while a pair of filters bring the needed discrimination on the side-tones.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132082969","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 W-band spectrometer for dielectric measurements 用于介电测量的新型w波段光谱仪
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.862289
M. Afsar, I. Tkachov, K. Kocharyan
{"title":"A novel W-band spectrometer for dielectric measurements","authors":"M. Afsar, I. Tkachov, K. Kocharyan","doi":"10.1109/MWSYM.2000.862289","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862289","url":null,"abstract":"A new spectrometer for the precision measurement of dielectric permittivity and loss tangent is presented. The new instrument is capable of providing the high resolution data for the first time over extended W-band (68-118 GHz) frequencies for specimens with a large range of absorption values, including highly absorbing specimens which otherwise would not be possible. A novel technique based on the unbalanced bridge is developed for the measurement of the phase of the wave passed through the specimen in free space (quasi-optical) with reference provided by a waveguide arm. Specially constructed precision waveguide and quasi-optical components allowed reliable broadband operation. A number of common dielectrics are measured and results are compared with previously reported data.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130504918","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: 48
A unified approach of PM noise calculation in large RF multitone autonomous circuits 大型射频多音自治电路中PM噪声的统一计算方法
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.861046
P. Bolcato, J. Nallatamby, R. Larcheveque, M. Prigent, J. Obregon
{"title":"A unified approach of PM noise calculation in large RF multitone autonomous circuits","authors":"P. Bolcato, J. Nallatamby, R. Larcheveque, M. Prigent, J. Obregon","doi":"10.1109/MWSYM.2000.861046","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.861046","url":null,"abstract":"This paper presents a simulation method to compute noise in autonomous and forced circuits using the harmonic balance (HB) formulation. Thanks to iterative linear solvers and multi-dimension conversion matrices, it can handle large multi-tone circuits to calculate phase noise spectra near and far from the carrier frequency. Its efficiency is illustrated with two real circuits.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131327772","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: 20
A novel triple-push oscillator approach 一种新颖的三推振荡器方法
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.863574
Yu-Long Tang, Huei Wang
{"title":"A novel triple-push oscillator approach","authors":"Yu-Long Tang, Huei Wang","doi":"10.1109/MWSYM.2000.863574","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.863574","url":null,"abstract":"A novel triple-push oscillator approach is proposed for the first time. This new oscillator topology combines three identical oscillator subcircuits. An analytical formulation is derived to present all the current modes. As will be shown, odd mode currents in each oscillator subcircuit have a 1200 phase shift to one another and thus produce in-phase combining for the third harmonic signal. To prove this concept, a 5-GHz triple-push oscillator was designed and fabricated on an FR4 substrate. The measured results showed that at 4.86 GHz, an output signal of 1.7 dBm was delivered with 12.7-dB suppression of the fundamental frequency.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128872624","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: 11
GaN Gunn diodes for THz signal generation 用于太赫兹信号产生的GaN - Gunn二极管
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.862354
E. Alekseev, D. Pavlidis
{"title":"GaN Gunn diodes for THz signal generation","authors":"E. Alekseev, D. Pavlidis","doi":"10.1109/MWSYM.2000.862354","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862354","url":null,"abstract":"The frequency and power capability of GaN-based Gunn diodes are evaluated using transient hydrodynamic simulations. GaN Gunn oscillators with 2 /spl mu/m-thick GaN Gunn diodes are predicted to have a fundamental frequency of 148-162 GHz and power density of >10/sup 5/ W/cm/sup 2/. Due to their high frequency and power characteristics, applications of these devices are envisaged for THz signal generation.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125421429","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: 31
Numerical and experimental characterization of slow-wave microstrip line on periodic ground plane 周期性地平面上慢波微带线的数值与实验表征
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017) Pub Date : 2000-06-11 DOI: 10.1109/MWSYM.2000.862267
Chin-Chang Chang, R. Cocciolo, Y. Qian, T. Itoh
{"title":"Numerical and experimental characterization of slow-wave microstrip line on periodic ground plane","authors":"Chin-Chang Chang, R. Cocciolo, Y. Qian, T. Itoh","doi":"10.1109/MWSYM.2000.862267","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862267","url":null,"abstract":"A low loss//spl lambda/ slow-wave microstrip transmission line structure is numerically and experimentally investigated. The structure is based on a microstrip line on periodically etched ground plane. Dependency of the slow-wave factor on lattice dimensions is investigated. The slow-wave factor has also been simulated by the FDTD method as numerical verification of the accuracy of the results. Numerical results reveal that the slow-wave microstrip structure can reduce the attenuation//spl lambda/ by 6/spl times/ compared to conventional planar slow-wave structures.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126706866","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
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