Pub Date : 1977-06-21DOI: 10.1109/MWSYM.1977.1124483
P. Guillon, Y. Garault
In this paper, the radiation quality factor of cylindrical dielectric resonators has been evaluated by solving the characteristic equation of the chosen mode in the complex plane. In all cases this Q factor is too low for practical applications. So in order to prevent the losses by radiation we enclose the dielectric resonator in a metallic cylindrical shield. For such a geometry the unloaded quality factor of the shielded resonator has been calculated.
{"title":"Q Factors of Free and Shielded Cylindrical Dielectric Resonators","authors":"P. Guillon, Y. Garault","doi":"10.1109/MWSYM.1977.1124483","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124483","url":null,"abstract":"In this paper, the radiation quality factor of cylindrical dielectric resonators has been evaluated by solving the characteristic equation of the chosen mode in the complex plane. In all cases this Q factor is too low for practical applications. So in order to prevent the losses by radiation we enclose the dielectric resonator in a metallic cylindrical shield. For such a geometry the unloaded quality factor of the shielded resonator has been calculated.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116452072","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124367
R. Harrison
A novel configuration using GaAs varactors in a balanced circuit incorporating both coplanar waveguide and microstrip elements has permitted the construction of frequency dividers which have near-octave divide-by-two bandwidth and excellent response to pulsed r.f. inputs. The design and performance of such a frequency divider for inputs in the 4 to 8 GHz range is discussed.
{"title":"Broadband Frequency Dividers Using Microwave Varactors","authors":"R. Harrison","doi":"10.1109/MWSYM.1977.1124367","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124367","url":null,"abstract":"A novel configuration using GaAs varactors in a balanced circuit incorporating both coplanar waveguide and microstrip elements has permitted the construction of frequency dividers which have near-octave divide-by-two bandwidth and excellent response to pulsed r.f. inputs. The design and performance of such a frequency divider for inputs in the 4 to 8 GHz range is discussed.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114962434","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124490
A. Ganguly, B. Spielman
An accurate solution to the problem of wave propagation along arbitrarily-configured transmission media composed of conductors and/or inhomogeneous dielectrics is presented. The solution is available in the form of a digital computer program, which yields computed cutoff frequencies and dispersion characteristics for both fundamental and higher-order modes. Sample calculations are presented for shielded microstrip, to illustrate the validity of the analysis, and channelized suspended microstrip. The solution approach presented is distinctive in its ability to easily treat complicated, salient features of arbitrary cross sections, as is typified by the channel in the suspended-microstrip example.
{"title":"Analysis of Dispersion in Arbitrarily Configured Dielectric-Loaded Transmission Structures","authors":"A. Ganguly, B. Spielman","doi":"10.1109/MWSYM.1977.1124490","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124490","url":null,"abstract":"An accurate solution to the problem of wave propagation along arbitrarily-configured transmission media composed of conductors and/or inhomogeneous dielectrics is presented. The solution is available in the form of a digital computer program, which yields computed cutoff frequencies and dispersion characteristics for both fundamental and higher-order modes. Sample calculations are presented for shielded microstrip, to illustrate the validity of the analysis, and channelized suspended microstrip. The solution approach presented is distinctive in its ability to easily treat complicated, salient features of arbitrary cross sections, as is typified by the channel in the suspended-microstrip example.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133775019","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124349
R. Hamilton, S. Long
Amplifier evaluations in the 30 to 45 GHz frequency range have yielded device noise figures below 9 dB with up to 5 dB associated gain. Other reaults and a device model in close agreement with measured impedances are presented.
{"title":"Amplifier Applications of Millimeter Wave InP GUNN Devices","authors":"R. Hamilton, S. Long","doi":"10.1109/MWSYM.1977.1124349","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124349","url":null,"abstract":"Amplifier evaluations in the 30 to 45 GHz frequency range have yielded device noise figures below 9 dB with up to 5 dB associated gain. Other reaults and a device model in close agreement with measured impedances are presented.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130637906","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124450
J. D. Crowley, J. Weller, T. Giallorenzi
An actively controlled SAW multistrip coupler has been fabricated which employs an SAW magic tee and a new acoustoelectric phase shifter. This device can be used as a continuously variable power divider or as a switch.
{"title":"Actively Controlled SAW Multistrip Coupler","authors":"J. D. Crowley, J. Weller, T. Giallorenzi","doi":"10.1109/MWSYM.1977.1124450","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124450","url":null,"abstract":"An actively controlled SAW multistrip coupler has been fabricated which employs an SAW magic tee and a new acoustoelectric phase shifter. This device can be used as a continuously variable power divider or as a switch.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130850078","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124392
C. Stillings, R. Cushing, F.O. Johnson, H. J. Mohr
This paper describes a program to optimize the performance of a high-power broadband satellite communications klystron by selection and interfacing a chain of microwave components between the tube and antenna. Tests results are given for the 7.9 to 8.4 GHz military satellite communications band.
{"title":"The Selection of High-Power Integrated Microwave Components for Military Satellite Communication Terminals","authors":"C. Stillings, R. Cushing, F.O. Johnson, H. J. Mohr","doi":"10.1109/MWSYM.1977.1124392","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124392","url":null,"abstract":"This paper describes a program to optimize the performance of a high-power broadband satellite communications klystron by selection and interfacing a chain of microwave components between the tube and antenna. Tests results are given for the 7.9 to 8.4 GHz military satellite communications band.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"1999 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116684749","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124383
D. Mellor, L. Pierson
A calculator-based synthesis routine provides rapid and accurate design of interstage networks of prescribed gain, bandwidth, ripple and slope for use in microwave amplifiers. The complete design and measurement of a prototype 6-12 GHz amplifier illustrates the computer-aided synthesis approach to microwave amplifier design.
{"title":"Calculator-Based Synthesis Routine Speeds Microwave Amplifier Design","authors":"D. Mellor, L. Pierson","doi":"10.1109/MWSYM.1977.1124383","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124383","url":null,"abstract":"A calculator-based synthesis routine provides rapid and accurate design of interstage networks of prescribed gain, bandwidth, ripple and slope for use in microwave amplifiers. The complete design and measurement of a prototype 6-12 GHz amplifier illustrates the computer-aided synthesis approach to microwave amplifier design.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133267423","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124468
S. Kallianteris
A new filter structure in which low loss linear phase filters can be realized is described. These filters are longitudinal, employ TE/sub 103/ dual mode resonators. Experimental results of such a filter are presented, compared with results of equivalent fundamental mode Chebyshev, linear phase filters. These results demonstrate that such filters are suitable for multiplexer in satellite transponders operating above 10 GHz.
{"title":"Low Loss Linear Phase Filters","authors":"S. Kallianteris","doi":"10.1109/MWSYM.1977.1124468","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124468","url":null,"abstract":"A new filter structure in which low loss linear phase filters can be realized is described. These filters are longitudinal, employ TE/sub 103/ dual mode resonators. Experimental results of such a filter are presented, compared with results of equivalent fundamental mode Chebyshev, linear phase filters. These results demonstrate that such filters are suitable for multiplexer in satellite transponders operating above 10 GHz.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"26 5-6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133355303","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124493
P. Mercer, D. Cowan, A. Bell
FET Amplifiers with ambient noise figures as low as 4.8 dB at 12 GHz, 35 dB gain and intercept points as high as +28 dBm have been developed for use in communications satellites. Predicted mean time to failure is in excess of 10/sup 6/ hours.
{"title":"Low Noise and Linear FET Amplifiers for Satellite Communications","authors":"P. Mercer, D. Cowan, A. Bell","doi":"10.1109/MWSYM.1977.1124493","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124493","url":null,"abstract":"FET Amplifiers with ambient noise figures as low as 4.8 dB at 12 GHz, 35 dB gain and intercept points as high as +28 dBm have been developed for use in communications satellites. Predicted mean time to failure is in excess of 10/sup 6/ hours.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125786608","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124477
J.M. Moore
{"title":"A TV Satellite Broadcast System for the Public Broadcasting Service","authors":"J.M. Moore","doi":"10.1109/MWSYM.1977.1124477","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124477","url":null,"abstract":"","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125029039","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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