Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.187988
Xiaowei Zhu, Yi Yuan Chen, Si-fan Li
The authors describe a novel method of controlling the frequency of a W-band subharmonic Gunn oscillator using a laser beam. A maximum optical tuning frequency of 7 MHz has been observed experimentally. A cavity with a silicon piece glued on backshort is analyzed. The complex frequencies of the cavity as a function of plasma densities are obtained.<>
{"title":"W-band optically controlled Gunn subharmonic oscillator","authors":"Xiaowei Zhu, Yi Yuan Chen, Si-fan Li","doi":"10.1109/MWSYM.1992.187988","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.187988","url":null,"abstract":"The authors describe a novel method of controlling the frequency of a W-band subharmonic Gunn oscillator using a laser beam. A maximum optical tuning frequency of 7 MHz has been observed experimentally. A cavity with a silicon piece glued on backshort is analyzed. The complex frequencies of the cavity as a function of plasma densities are obtained.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123540083","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.187949
Y. Qian, E. Yamashita, K. Atsuki
The propagation and dispersion characteristics of picosecond pulses in a suspended coplanar waveguide (SCPW) are presented. An evaluation based on numerical analysis shows that the SCPW can result in an improvement of about five times in pulse transmission capability over conventional CPWs. Pulse propagation along the SCPW is studied by simulations and experiments, both of which show a substantial suppression in pulse distortion. It is concluded that the SCPW should be a promising transmission structure for ultrashort pulses with picosecond and subpicosecond durations.<>
{"title":"Theoretical and experimental evaluation of picosecond pulse propagation in suspended coplanar waveguides","authors":"Y. Qian, E. Yamashita, K. Atsuki","doi":"10.1109/MWSYM.1992.187949","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.187949","url":null,"abstract":"The propagation and dispersion characteristics of picosecond pulses in a suspended coplanar waveguide (SCPW) are presented. An evaluation based on numerical analysis shows that the SCPW can result in an improvement of about five times in pulse transmission capability over conventional CPWs. Pulse propagation along the SCPW is studied by simulations and experiments, both of which show a substantial suppression in pulse distortion. It is concluded that the SCPW should be a promising transmission structure for ultrashort pulses with picosecond and subpicosecond durations.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123672660","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.188154
E. El-Sharawy
The authors present measurements of pulse distortion, coupling, and loss due to discontinuities of the coplanar waveguide (CPW) on single and multilayer structures. The CPW compares favorably to the microstrip line in terms of low coupling and distortion. A novel metal-backed coplanar waveguide on a multilayer structure is introduced to minimize or eliminate pulse distortion due to overmoding. The new CPW structure also has the advantage of relatively low loss at discontinuities. For a T circuit, the loss per bend in the new structure was about 0.2 dB less than a similar microstrip line.<>
{"title":"Multilayer coplanar waveguide for high speed digital applications","authors":"E. El-Sharawy","doi":"10.1109/MWSYM.1992.188154","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.188154","url":null,"abstract":"The authors present measurements of pulse distortion, coupling, and loss due to discontinuities of the coplanar waveguide (CPW) on single and multilayer structures. The CPW compares favorably to the microstrip line in terms of low coupling and distortion. A novel metal-backed coplanar waveguide on a multilayer structure is introduced to minimize or eliminate pulse distortion due to overmoding. The new CPW structure also has the advantage of relatively low loss at discontinuities. For a T circuit, the loss per bend in the new structure was about 0.2 dB less than a similar microstrip line.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124077643","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.187979
A. Gasiewski, D. Kunkee
A hardware and software technique for rotation of the polarization basis of a dual orthogonal linearly polarized radiometer is discussed. The technique requires precise measurement of the two orthogonal-mode antenna temperatures along with cross-correlation of the two mode amplitudes (the first three Stokes parameters). An innovative polarized blackbody load was developed for accurate calibration of the cross-correlating channel. Using 90-GHz near-Brewster angle observations of a polarizing water surface, rotation of the antenna's polarization basis by a matrix transformation was performed. The experimental results demonstrate the viability of electronic polarization basis rotation (EPBR) and suggest practical calibration schemes for full-polarization radiometers. Applications of EBPR include mechanically scanned polarization-sensitive imaging radiometers.<>
{"title":"Laboratory demonstration of electronic polarization basis rotation","authors":"A. Gasiewski, D. Kunkee","doi":"10.1109/MWSYM.1992.187979","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.187979","url":null,"abstract":"A hardware and software technique for rotation of the polarization basis of a dual orthogonal linearly polarized radiometer is discussed. The technique requires precise measurement of the two orthogonal-mode antenna temperatures along with cross-correlation of the two mode amplitudes (the first three Stokes parameters). An innovative polarized blackbody load was developed for accurate calibration of the cross-correlating channel. Using 90-GHz near-Brewster angle observations of a polarizing water surface, rotation of the antenna's polarization basis by a matrix transformation was performed. The experimental results demonstrate the viability of electronic polarization basis rotation (EPBR) and suggest practical calibration schemes for full-polarization radiometers. Applications of EBPR include mechanically scanned polarization-sensitive imaging radiometers.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124380898","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.187913
J. A. Casao, P. Dorta, J. L. Cáceres, M. Salazar-Palma, J. Perez
The design, implementation and test results of a simple GaAs monolithic transimpedance amplifier with enhanced performance for high-speed optical communications are described. A cascode configuration, improved in terms of bandwidth and noise, is used. On-wafer and on-carrier measurements show close agreement with simulated behavior. Excellent performance with high transimpedance gain, a bandwidth from DC to 1.6 GHz, low noise, and low power consumption is obtained. The temperature and bias point sensitivity is negligible. This last item turns out to be a major commercial achievement.<>
{"title":"An enhanced GaAs monolithic transimpedance amplifier for low noise and high speed optical communications","authors":"J. A. Casao, P. Dorta, J. L. Cáceres, M. Salazar-Palma, J. Perez","doi":"10.1109/MWSYM.1992.187913","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.187913","url":null,"abstract":"The design, implementation and test results of a simple GaAs monolithic transimpedance amplifier with enhanced performance for high-speed optical communications are described. A cascode configuration, improved in terms of bandwidth and noise, is used. On-wafer and on-carrier measurements show close agreement with simulated behavior. Excellent performance with high transimpedance gain, a bandwidth from DC to 1.6 GHz, low noise, and low power consumption is obtained. The temperature and bias point sensitivity is negligible. This last item turns out to be a major commercial achievement.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124275574","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.188254
A. Sharma, Huei Wang
Experimental models of several grounded coplanar waveguide discontinuity structures, such as series and shunt inductors and capacitors, have been developed using experimental measurements and computer optimization. The equivalent circuit models have been derived in terms of structural parameters of the discontinuity structures to facilitate their easy use in the design of coplanar MMICs (monolithic microwave integrated circuits). These simple models can be integrated with any simulation program to facilitate their easy use.<>
{"title":"Experimental models of series and shunt elements in coplanar MMICs","authors":"A. Sharma, Huei Wang","doi":"10.1109/MWSYM.1992.188254","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.188254","url":null,"abstract":"Experimental models of several grounded coplanar waveguide discontinuity structures, such as series and shunt inductors and capacitors, have been developed using experimental measurements and computer optimization. The equivalent circuit models have been derived in terms of structural parameters of the discontinuity structures to facilitate their easy use in the design of coplanar MMICs (monolithic microwave integrated circuits). These simple models can be integrated with any simulation program to facilitate their easy use.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123897942","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.188299
H. Kuno, T. A. Midford
The authors reviewed the state of the art in millimeter-wave packaging and analyzed its potentials and limitations. Based on the analysis of the requirements and technology development, the following trends can be expected for millimeter-wave packages: (1) packaging at higher levels of integration-the advent of millimeter-wave multichip packages; (2) the substantially increased use of electromagnetic simulation design tools; (3) the introduction of new materials and processes, for example AlN and cofired ceramic techniques; (4) the integration of a considerably higher complexity and multiplicity of electronic functions within the package envelope; and (5) a substantial reduction in the size, weight, and cost of millimeter-wave packages.<>
{"title":"Millimeter-wave packaging","authors":"H. Kuno, T. A. Midford","doi":"10.1109/MWSYM.1992.188299","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.188299","url":null,"abstract":"The authors reviewed the state of the art in millimeter-wave packaging and analyzed its potentials and limitations. Based on the analysis of the requirements and technology development, the following trends can be expected for millimeter-wave packages: (1) packaging at higher levels of integration-the advent of millimeter-wave multichip packages; (2) the substantially increased use of electromagnetic simulation design tools; (3) the introduction of new materials and processes, for example AlN and cofired ceramic techniques; (4) the integration of a considerably higher complexity and multiplicity of electronic functions within the package envelope; and (5) a substantial reduction in the size, weight, and cost of millimeter-wave packages.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123630701","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.188284
Michael B. Steed, Steven B. Goldbergt, Glenn Rime, Paul D. Franzont, Iwona Turlikt, Jeff, Kastent
The through-line (TL) method is introduced to replace the through-reflect-line (TRL) deembedding procedure. TL utilizes measurements of two lengths of line following approximate open-short-line calibration. TL accounts for the frequency-dependent characteristic impedance of the line and avoids the periodic glitches inherent in the TRL procedure.<>
{"title":"Introducing the through-line deembedding procedure","authors":"Michael B. Steed, Steven B. Goldbergt, Glenn Rime, Paul D. Franzont, Iwona Turlikt, Jeff, Kastent","doi":"10.1109/MWSYM.1992.188284","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.188284","url":null,"abstract":"The through-line (TL) method is introduced to replace the through-reflect-line (TRL) deembedding procedure. TL utilizes measurements of two lengths of line following approximate open-short-line calibration. TL accounts for the frequency-dependent characteristic impedance of the line and avoids the periodic glitches inherent in the TRL procedure.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122373134","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.188252
E. Chiprout, M. Nakhla
A novel nonlinear waveform estimation method based on asymptotic waveform evaluation is presented. The method generates transient waveform estimation of large, distributed networks with arbitrary terminations, while using neither convolution nor numerical inversion techniques, both of which are found to be expensive for other methods. These are avoided due to the exponential form of the fundamental modes of the linear system. The linear network analysis speedup of waveform estimation, already demonstrated, is supplemented here for the nonlinear case.<>
{"title":"Fast nonlinear waveform estimation for large distributed networks","authors":"E. Chiprout, M. Nakhla","doi":"10.1109/MWSYM.1992.188252","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.188252","url":null,"abstract":"A novel nonlinear waveform estimation method based on asymptotic waveform evaluation is presented. The method generates transient waveform estimation of large, distributed networks with arbitrary terminations, while using neither convolution nor numerical inversion techniques, both of which are found to be expensive for other methods. These are avoided due to the exponential form of the fundamental modes of the linear system. The linear network analysis speedup of waveform estimation, already demonstrated, is supplemented here for the nonlinear case.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128317258","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}
Pub Date : 1992-06-01DOI: 10.1109/MWSYM.1992.188026
Y. Carmel, W. Lou, T. Antonsen, John C. Rodgers, B. Levush, J. Tate, W. Destler, V. Granatstein
Summary form only given, as follows. The area of relativistic plasma microwave electronics has recently generated renewed interest in the microwave and millimeter-wave device community. The authors have obtained experimental data demonstrating that the presence of a low-density background plasma in a relativistic backward wave oscillator leads to several beneficial effects, including enhanced interaction efficiency (40%), operation at very low and possibly zero guiding magnetic field, tunability by controlling the plasma density, a high degree of spectral purity, and operation well above the vacuum limiting current.<>
{"title":"Relativistic plasma microwave electronics: studies of high power plasma filled backward wave oscillators","authors":"Y. Carmel, W. Lou, T. Antonsen, John C. Rodgers, B. Levush, J. Tate, W. Destler, V. Granatstein","doi":"10.1109/MWSYM.1992.188026","DOIUrl":"https://doi.org/10.1109/MWSYM.1992.188026","url":null,"abstract":"Summary form only given, as follows. The area of relativistic plasma microwave electronics has recently generated renewed interest in the microwave and millimeter-wave device community. The authors have obtained experimental data demonstrating that the presence of a low-density background plasma in a relativistic backward wave oscillator leads to several beneficial effects, including enhanced interaction efficiency (40%), operation at very low and possibly zero guiding magnetic field, tunability by controlling the plasma density, a high degree of spectral purity, and operation well above the vacuum limiting current.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128581380","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}
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