Pub Date : 1977-06-21DOI: 10.1109/MWSYM.1977.1124388
J. Marquardt, G. Muller
A computer-aided tuning procedure for microwave circuits - especially multituned narrow-band branching filters - has been developed. The mistuning of all elements after pretuning in a straight forward manner is small enough, thus a specially chosen network function depends nearly linear on the deviations of the tuning screws from their proper positions. These linearized relations and the regular values of the network function can be calculated from the equivalent circuit of the filter with the help of a large computer. They can then be inserted into the small computer of the measurement set-up. The appropriate changes of the tuning elements for sufficient performance of the filter together with clear tuning criteria for the operator are computed from the test values of the pretuned filter. The procedure will be repeated several times, because of the only quasi-linear relations between the deviations of the tuning elements from their proper position and the special network function.
{"title":"Computer-Aided Tuning of Microwave Circuits","authors":"J. Marquardt, G. Muller","doi":"10.1109/MWSYM.1977.1124388","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124388","url":null,"abstract":"A computer-aided tuning procedure for microwave circuits - especially multituned narrow-band branching filters - has been developed. The mistuning of all elements after pretuning in a straight forward manner is small enough, thus a specially chosen network function depends nearly linear on the deviations of the tuning screws from their proper positions. These linearized relations and the regular values of the network function can be calculated from the equivalent circuit of the filter with the help of a large computer. They can then be inserted into the small computer of the measurement set-up. The appropriate changes of the tuning elements for sufficient performance of the filter together with clear tuning criteria for the operator are computed from the test values of the pretuned filter. The procedure will be repeated several times, because of the only quasi-linear relations between the deviations of the tuning elements from their proper position and the special network function.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"182 13-14","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132331405","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.1977.1124435
S. Cripps, O. Nielsen, D. Parker, J. Turner
Experimental results are presented for X-band GaAs FET mixers. Two circuits using commercially available single-gate devices have yielded good conversion gains at 10 GHz, and a specially developed dual-gate device in a simple microwave circuit has yielded 11 dB conversion gain and 6.5 dB noise figure (D.S.B. ), at 10 GHz.
{"title":"An Experimental Evaluation of X-Band GaAs FET Mixers Using Single and Dual-Gate Devices","authors":"S. Cripps, O. Nielsen, D. Parker, J. Turner","doi":"10.1109/MWSYM.1977.1124435","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124435","url":null,"abstract":"Experimental results are presented for X-band GaAs FET mixers. Two circuits using commercially available single-gate devices have yielded good conversion gains at 10 GHz, and a specially developed dual-gate device in a simple microwave circuit has yielded 11 dB conversion gain and 6.5 dB noise figure (D.S.B. ), at 10 GHz.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"117 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":"133628368","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.1977.1124354
H. Cronson, L. Susman
This paper describes a programmable calculator-controlled six-port system designed to measure S/sub 21/, and S/sub11/, over a wide microwave frequency range without disturbing the device under test. Measurements taken from 7 to 12 GHz show that results within 1% can be obtained.
{"title":"A Six-Port Automatic Network Analyzer","authors":"H. Cronson, L. Susman","doi":"10.1109/MWSYM.1977.1124354","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124354","url":null,"abstract":"This paper describes a programmable calculator-controlled six-port system designed to measure S/sub 21/, and S/sub11/, over a wide microwave frequency range without disturbing the device under test. Measurements taken from 7 to 12 GHz show that results within 1% can be obtained.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"11 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":"115646577","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.1977.1124389
M. Iskander, M. Hamid
A time-domain technique for the measurement of return loss, attenuation and coupling loss of leaky coaxial cables is described. The technique is based on a simple signal flow graph procedure where the leaky cable is represented by a three-port network, with the third port being introduced to represent the leakage from the cable. The measurement procedure is described, while experimental results for three different leaky coaxial cables are presented and compared with frequency-domain data.
{"title":"A Time-Domain Technique for Characterizing Leaky Coaxial Cables","authors":"M. Iskander, M. Hamid","doi":"10.1109/MWSYM.1977.1124389","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124389","url":null,"abstract":"A time-domain technique for the measurement of return loss, attenuation and coupling loss of leaky coaxial cables is described. The technique is based on a simple signal flow graph procedure where the leaky cable is represented by a three-port network, with the third port being introduced to represent the leakage from the cable. The measurement procedure is described, while experimental results for three different leaky coaxial cables are presented and compared with frequency-domain data.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"993 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":"116223844","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.1977.1124385
M. Parisot, J. Magarshack
A simple analogue simulator is used to define circuit topology with lumped and distributed elements, to vary circuit parameters and to continuously display the frequency response. Parameter sensitivity can also be tested. Applications are given.
{"title":"Microwave Circuit Design by Means of a Simple Simulator With an On-line Minicomputer","authors":"M. Parisot, J. Magarshack","doi":"10.1109/MWSYM.1977.1124385","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124385","url":null,"abstract":"A simple analogue simulator is used to define circuit topology with lumped and distributed elements, to vary circuit parameters and to continuously display the frequency response. Parameter sensitivity can also be tested. Applications are given.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"224 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":"116315430","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.1977.1124397
G. Fanslow, D. Stephenson
The temperature-dependent light scattering properties of cholesteric liquid crystals are used as both the sensing and indicating mechanism in a calorimetric radiation monitor. The liquid crystals are arranged on two dielectric disks; one is a plain dielectric and the other is metal coated. While both disks will respond to general changes in ambient conditions, the metallized disk will also have a temperature change due to absorbed radiation. Thus, the difference between the temperatures of the two disks, as indicated by the liquid crystals, is a measure of radiation. Experimental models are described and the results of tests at 2.45 GHz for power densities of from 1 to 15 mW/cm/sup 2/ are presented.
{"title":"A Passive Method for Monitoring Non-Ionizing Radiation","authors":"G. Fanslow, D. Stephenson","doi":"10.1109/MWSYM.1977.1124397","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124397","url":null,"abstract":"The temperature-dependent light scattering properties of cholesteric liquid crystals are used as both the sensing and indicating mechanism in a calorimetric radiation monitor. The liquid crystals are arranged on two dielectric disks; one is a plain dielectric and the other is metal coated. While both disks will respond to general changes in ambient conditions, the metallized disk will also have a temperature change due to absorbed radiation. Thus, the difference between the temperatures of the two disks, as indicated by the liquid crystals, is a measure of radiation. Experimental models are described and the results of tests at 2.45 GHz for power densities of from 1 to 15 mW/cm/sup 2/ are presented.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"24 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":"123275518","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.1977.1124404
C. Krowne, F. Marki, E. Crescenzi
The development of a Ku-band receiver front-end using microwave integrated circuit technology is described. The front end elements, including a GaAs FET RF balanced amplifier stage, an image reject mixer, and a varactor controlled GaAs FET oscillator are integrated in a very small simple hermetic package. Electrical design details are presented for the varactor controlled FET oscillator development.
介绍了一种采用微波集成电路技术的ku波段接收机前端的研制。前端元件，包括一个GaAs FET RF平衡放大器级，一个图像抑制混频器和一个变容控制的GaAs FET振荡器集成在一个非常小的简单密封封装中。介绍了变容控制FET振荡器的电气设计细节。
{"title":"Ku-Band Receiver Front-End Using MIC Technology","authors":"C. Krowne, F. Marki, E. Crescenzi","doi":"10.1109/MWSYM.1977.1124404","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124404","url":null,"abstract":"The development of a Ku-band receiver front-end using microwave integrated circuit technology is described. The front end elements, including a GaAs FET RF balanced amplifier stage, an image reject mixer, and a varactor controlled GaAs FET oscillator are integrated in a very small simple hermetic package. Electrical design details are presented for the varactor controlled FET oscillator development.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"33 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":"124481540","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.1977.1124442
D. Mellor
Design equations are derived for matched microstrip equalizers which provide a specified gain at three passband frequencies and present a good match to both source and load. Design examples compare measured results to theoretical predictions, and the application of matched equalizers to microwave amplifier design is discussed.
{"title":"On the Design of Matched Equalizers of Prescribed Gain Versus Frequency Profiles","authors":"D. Mellor","doi":"10.1109/MWSYM.1977.1124442","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124442","url":null,"abstract":"Design equations are derived for matched microstrip equalizers which provide a specified gain at three passband frequencies and present a good match to both source and load. Design examples compare measured results to theoretical predictions, and the application of matched equalizers to microwave amplifier design is discussed.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"50 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":"124013316","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.1977.1124440
M. C. Horton
A simple technique is presented for design of TEM-mode bandpass filters that use eighth-wavelength coupled stubs in their realization. The filters, either of two dual forms, are identical in theoretical performance to conventional planar parallel-coupled filters often used in stripline fabrication; and to the interdigital filter, or the equivalent quarter-wavelength shorted stubs spaced at quarter-wavelength intervals along a transmission line. The design method uses existing tabulated element values and a novel Kuroda transformation which has been previously used in the design of directional filters.
{"title":"TEM Bandpass Filters Having Eighth-Wavelength Coupled Stubs","authors":"M. C. Horton","doi":"10.1109/MWSYM.1977.1124440","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124440","url":null,"abstract":"A simple technique is presented for design of TEM-mode bandpass filters that use eighth-wavelength coupled stubs in their realization. The filters, either of two dual forms, are identical in theoretical performance to conventional planar parallel-coupled filters often used in stripline fabrication; and to the interdigital filter, or the equivalent quarter-wavelength shorted stubs spaced at quarter-wavelength intervals along a transmission line. The design method uses existing tabulated element values and a novel Kuroda transformation which has been previously used in the design of directional filters.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"56 4 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":"130967981","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.1977.1124505
K. Araki, Y. Naito
Proposing a canonical representation, valid for analysis and synthesis, of circulator, the paper also attempts to prove the circulator's figure of merit to be invariant under an arbitrary lossless reciprocal and cyclic-symetry imbedding.
{"title":"Canonical Representation and Figure of Merit of Circulator","authors":"K. Araki, Y. Naito","doi":"10.1109/MWSYM.1977.1124505","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124505","url":null,"abstract":"Proposing a canonical representation, valid for analysis and synthesis, of circulator, the paper also attempts to prove the circulator's figure of merit to be invariant under an arbitrary lossless reciprocal and cyclic-symetry imbedding.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"42 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":"128966191","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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