Pub Date : 1983-09-01DOI: 10.1109/EUMA.1983.333233
G. Bava, C. Beccari, C. Naldi, U. Pisani, V. Pozzolo, A. Battisti, F. Tegagni
This paper describes the design and development of a C-band Solid State Power Amplifier (SSPA) to be used as TWTA replacement in down-link transmitters.
本文介绍了一种c波段固态功率放大器(SSPA)的设计与开发，用于替代下行链路发射机中的TWTA。
{"title":"Satellite GaAs FET Power Amplifier Replacing TWTA in C-Band","authors":"G. Bava, C. Beccari, C. Naldi, U. Pisani, V. Pozzolo, A. Battisti, F. Tegagni","doi":"10.1109/EUMA.1983.333233","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333233","url":null,"abstract":"This paper describes the design and development of a C-band Solid State Power Amplifier (SSPA) to be used as TWTA replacement in down-link transmitters.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124708036","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333302
H. L. Wang, R. Zhang
A new method for resolving the boundary condition eigenvalue equation of the cylindrical corrugated system is given. According to this method, the real or the "imaginary roots of the eigenvalue equation can be computed rapidly and easily, especially, the superiority is manifested for computing the complex roots. All the eigenvalues in a certain range are computed and their graphs are drawn here.
{"title":"Complex Eigenvalues of Corrugated Waveguide","authors":"H. L. Wang, R. Zhang","doi":"10.1109/EUMA.1983.333302","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333302","url":null,"abstract":"A new method for resolving the boundary condition eigenvalue equation of the cylindrical corrugated system is given. According to this method, the real or the \"imaginary roots of the eigenvalue equation can be computed rapidly and easily, especially, the superiority is manifested for computing the complex roots. All the eigenvalues in a certain range are computed and their graphs are drawn here.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129719146","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333312
K. Jokela, L. Puranen
Two square TEM transmission cells with side heights 30 cm and 50 cm were designed for the calibration of RF-hazard monitors. The error due to reflections was reduced from ±10 % to ±2 % (input VSWR < 1.2) by lengthening straight sections and measuring the longitudinal E-field patterns at calibration frequencies. Comparison measurements with small probes showed that the maximum difference between the cells was 7 % except some sharp resonance points caused by TEM harmonics and TE01 mode. The vertical field non-uniformity was also examined.
{"title":"Evaluation and Improvement of the Accuracy of TEM Transmission Cells with Internal Field Measurements","authors":"K. Jokela, L. Puranen","doi":"10.1109/EUMA.1983.333312","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333312","url":null,"abstract":"Two square TEM transmission cells with side heights 30 cm and 50 cm were designed for the calibration of RF-hazard monitors. The error due to reflections was reduced from ±10 % to ±2 % (input VSWR < 1.2) by lengthening straight sections and measuring the longitudinal E-field patterns at calibration frequencies. Comparison measurements with small probes showed that the maximum difference between the cells was 7 % except some sharp resonance points caused by TEM harmonics and TE01 mode. The vertical field non-uniformity was also examined.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130236256","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333238
H. Ebner, J. Opfer, E. Schweppe
A novel E-plane transistor mount for use up to the mm-wave range is presented. The quasiplanar waveguide structure developed is made on thin, low dielectric substrate inserted in the E-plane of a rectangular wavequide and incorporates a microstrip, and a slotted, inhomogeneous finline partially coated with a dissipative layer. Featuring excellent reproduciblity, low insertion and hiqh return loss in the waveguide band and appropriate broadband match below waveguide cutoff this design is shown to be well suited for precision measurement and amplifier applications. Performance data. of a realized X-band structure are reported.
{"title":"A New Integrated Waveguide Transistor Mount","authors":"H. Ebner, J. Opfer, E. Schweppe","doi":"10.1109/EUMA.1983.333238","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333238","url":null,"abstract":"A novel E-plane transistor mount for use up to the mm-wave range is presented. The quasiplanar waveguide structure developed is made on thin, low dielectric substrate inserted in the E-plane of a rectangular wavequide and incorporates a microstrip, and a slotted, inhomogeneous finline partially coated with a dissipative layer. Featuring excellent reproduciblity, low insertion and hiqh return loss in the waveguide band and appropriate broadband match below waveguide cutoff this design is shown to be well suited for precision measurement and amplifier applications. Performance data. of a realized X-band structure are reported.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130431945","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333317
W. Schuck, R. Rieger
A high capacity communication link is described, which uses a slotted-waveguide as a transmission medium. The slotted-waveguide is a rectangular waveguide with a framed slot in its broadwall. The coupling structure, mounted to the moving Maglev vehicle, is plunging through this slot into the waveguiding region. The paper describes those elements which from the system-und component-designer's point of view are in particular inherent to the slotted-waveguide technology. Neglegible electromagnetic interference and high communication capacity makes the slotted waveguide attractive for mobile applications where sufficient track-holding is provided.
{"title":"The Slotted-Waveguide Communication System of the Maglev Test Range in the Emsland, Germany","authors":"W. Schuck, R. Rieger","doi":"10.1109/EUMA.1983.333317","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333317","url":null,"abstract":"A high capacity communication link is described, which uses a slotted-waveguide as a transmission medium. The slotted-waveguide is a rectangular waveguide with a framed slot in its broadwall. The coupling structure, mounted to the moving Maglev vehicle, is plunging through this slot into the waveguiding region. The paper describes those elements which from the system-und component-designer's point of view are in particular inherent to the slotted-waveguide technology. Neglegible electromagnetic interference and high communication capacity makes the slotted waveguide attractive for mobile applications where sufficient track-holding is provided.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123099544","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333294
W. Schiller
A simple method to improve the local oscillator suppression of mixer circuits in a broadband manner will be presented. The dependencies of temperature, power and voltage changes will be shown. Finally the construction and performance of a 4-GHz SSB-upconverter using this method will be described.
{"title":"Broadband Linear SSB-Upconverter with Electronically-Controlled Lo-Suppression for 16 QAM Applications at 4 GHz","authors":"W. Schiller","doi":"10.1109/EUMA.1983.333294","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333294","url":null,"abstract":"A simple method to improve the local oscillator suppression of mixer circuits in a broadband manner will be presented. The dependencies of temperature, power and voltage changes will be shown. Finally the construction and performance of a 4-GHz SSB-upconverter using this method will be described.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121173479","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333300
P. Pribetich, P. Kennis, S. Toutain
In this paper, we present the study of microstrip lines with tuning septums laid on muscle. For several values of the complex permittivity, we give the frequency behaviour of such structures(effective permittivity, attenuation and energy configurations).
{"title":"Dispersion Characteristics and Energy Configurations of a Microstrip Line with Tuning Septums Laid on Muscle","authors":"P. Pribetich, P. Kennis, S. Toutain","doi":"10.1109/EUMA.1983.333300","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333300","url":null,"abstract":"In this paper, we present the study of microstrip lines with tuning septums laid on muscle. For several values of the complex permittivity, we give the frequency behaviour of such structures(effective permittivity, attenuation and energy configurations).","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"41 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131575673","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333299
M. Melek, A. Anderson, J. Conway, B. H. Brown
The feasibility of using phased arrays for focused microwave hyperthermia is examined. A prototype system consisting of a semi-elliptic array of six 2.45GHz dipole antennas surrounding a homogeneous cylindrical body with the dielectric properties of the human lungs, and a linear array of five elements parallel to the axis of the body has been used to verify computational simulations of the same configuration. Microwave field intensities measured within the phantom indicate good agreement with theoretical predictions. A computer simulation for a different configuration is presented in order to show the inherent flexibility of the phased array applicator system. The results confirm the possibility of using phased arrays for induced localised hyperthermia for deep-seated tumour destruction provided that temperature monitoring is available.
{"title":"Three Dimensional Phantom Measurements Validating the Use of Phased Arrays for Deep-Seated Tumour Irradiation","authors":"M. Melek, A. Anderson, J. Conway, B. H. Brown","doi":"10.1109/EUMA.1983.333299","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333299","url":null,"abstract":"The feasibility of using phased arrays for focused microwave hyperthermia is examined. A prototype system consisting of a semi-elliptic array of six 2.45GHz dipole antennas surrounding a homogeneous cylindrical body with the dielectric properties of the human lungs, and a linear array of five elements parallel to the axis of the body has been used to verify computational simulations of the same configuration. Microwave field intensities measured within the phantom indicate good agreement with theoretical predictions. A computer simulation for a different configuration is presented in order to show the inherent flexibility of the phased array applicator system. The results confirm the possibility of using phased arrays for induced localised hyperthermia for deep-seated tumour destruction provided that temperature monitoring is available.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115163056","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333290
E. Kollberg, H. Zirath, M.V. Schneider, A.Y. Chon, A. Jeleński
We present experimental evidence that a single Schottky diode on GaAs is an agglomerate of paralleled microjunctions with different barrier heights and saturation currents. The current-voltage characteristic of the cluster breakes up into sections of exponentials with different slopes as one cools the diode from 300 K to 10 K. Noise measurements performed on cooled diodes at 4 GHz also confirm that a single device is a cluster of paralleled diodes. The model suggests a more compl icated equivalent cicuit of the diode which can also explain some of the problems experienced in attempts to theoretically predict cooled mixer noise performance. It also explains why in some diodes the excess noise appears at lower currents levels than in other diodes, a phenomenon which seriously degrades the low noise preformance of the mixer.
{"title":"Characteristics of Millimeter-Wave Schottky Diodes with Microcluster Interface","authors":"E. Kollberg, H. Zirath, M.V. Schneider, A.Y. Chon, A. Jeleński","doi":"10.1109/EUMA.1983.333290","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333290","url":null,"abstract":"We present experimental evidence that a single Schottky diode on GaAs is an agglomerate of paralleled microjunctions with different barrier heights and saturation currents. The current-voltage characteristic of the cluster breakes up into sections of exponentials with different slopes as one cools the diode from 300 K to 10 K. Noise measurements performed on cooled diodes at 4 GHz also confirm that a single device is a cluster of paralleled diodes. The model suggests a more compl icated equivalent cicuit of the diode which can also explain some of the problems experienced in attempts to theoretically predict cooled mixer noise performance. It also explains why in some diodes the excess noise appears at lower currents levels than in other diodes, a phenomenon which seriously degrades the low noise preformance of the mixer.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"14 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114007471","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 : 1983-09-01DOI: 10.1109/EUMA.1983.333192
P. Bielli, S. Contu, D. Savini, A. Saitto, R. Tascone
A new method for dimensioning a multiple layer Frequency Selective Surface (F.S.S.) based on an appropriate electromagnetic model will be examined. Feasibility and performance I imitations of F.S.S. having a single grid of Jerusalem crosses packed with several dielectric slabs will be analyzed. The technique of waveguide simulators is proposed as an attractive alternative to the radiation measurement technique. Experimental and theoretical results, in the frequency range of 8÷18Qk, are discussed in order to point out: the val idity of the measurement technique and the accuracy of the electromagnetic model.
{"title":"Design and Measurement of Frequency Selective Surfaces","authors":"P. Bielli, S. Contu, D. Savini, A. Saitto, R. Tascone","doi":"10.1109/EUMA.1983.333192","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333192","url":null,"abstract":"A new method for dimensioning a multiple layer Frequency Selective Surface (F.S.S.) based on an appropriate electromagnetic model will be examined. Feasibility and performance I imitations of F.S.S. having a single grid of Jerusalem crosses packed with several dielectric slabs will be analyzed. The technique of waveguide simulators is proposed as an attractive alternative to the radiation measurement technique. Experimental and theoretical results, in the frequency range of 8÷18Qk, are discussed in order to point out: the val idity of the measurement technique and the accuracy of the electromagnetic model.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115086271","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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