Pub Date : 1983-09-01DOI: 10.1109/EUMA.1983.333260
T. Ege
Two different methods for the analysis of the wave propagation along a TEM-line periodically series loaded with lumped capacitors is presented. The first method is based upon transmission line theory and a perturbation technique to estimate the complex propagation constant of the waves traveling along the structure. As an alternative approach, an exact analysis based on the principle of reaction is employed to compute the current distribution along the structure from which the propagation constant of the waves is determined. Numerical results for the complex propagation constant from the two methods are compared. For the parameter variations studied, the perturbation approach is found to agree well with those due to the moment method solution.
{"title":"Determination of the Propagation Constant of the Waves Traveling Along a TEM-line Periodically Series Loaded with Lumped Capacitors","authors":"T. Ege","doi":"10.1109/EUMA.1983.333260","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333260","url":null,"abstract":"Two different methods for the analysis of the wave propagation along a TEM-line periodically series loaded with lumped capacitors is presented. The first method is based upon transmission line theory and a perturbation technique to estimate the complex propagation constant of the waves traveling along the structure. As an alternative approach, an exact analysis based on the principle of reaction is employed to compute the current distribution along the structure from which the propagation constant of the waves is determined. Numerical results for the complex propagation constant from the two methods are compared. For the parameter variations studied, the perturbation approach is found to agree well with those due to the moment method solution.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"7 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":"124034578","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.1983.333248
C. Snowden, M. Howes, D. Morgan
A method of accurately designing microwave FET oscillators using a two terminal large-signal characterisation technique is described. Measurements are used to characterise a one-port microwave oscillator circuit in terms of admittance, frequency and signal level, with the FET embedded in a feedback network. Device surfaces are used in the optimal design of low noise FET oscillators. The technique is applied to several microstrip MESFET oscillator circuits.
{"title":"Microwave FET Oscillator Design Based on Large-Signal Characterisation","authors":"C. Snowden, M. Howes, D. Morgan","doi":"10.1109/EUMA.1983.333248","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333248","url":null,"abstract":"A method of accurately designing microwave FET oscillators using a two terminal large-signal characterisation technique is described. Measurements are used to characterise a one-port microwave oscillator circuit in terms of admittance, frequency and signal level, with the FET embedded in a feedback network. Device surfaces are used in the optimal design of low noise FET oscillators. The technique is applied to several microstrip MESFET oscillator circuits.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"43 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":"114848583","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.1983.333267
R. Tiberio, G. Pelosi, G. Manara
{"title":"High Frequency Scattering from a Thick Screen with Impedance Faces","authors":"R. Tiberio, G. Pelosi, G. Manara","doi":"10.1109/EUMA.1983.333267","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333267","url":null,"abstract":"","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"31 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":"121047831","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.1983.333245
M. Bester, K. Jacobs, B. Vowinkel
A new design for millimeter-wave Gunn oscillators has been developed, yielding a mechanical tuning range of about 15 GHz (70-85 GHz) and an output power up to 16 mW. The GaAs Gunn oscillator is tuned at the fundamental frequency (Q-band) in a crossed-waveguide resonator. In addition the output frequency of the Gunn oscillator is phase-locked by an active servo loop to an atomic clock.
{"title":"Phase-Locked Millimeter Wave Gunn Oscillators with Large Mechanical Tuning Range","authors":"M. Bester, K. Jacobs, B. Vowinkel","doi":"10.1109/EUMA.1983.333245","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333245","url":null,"abstract":"A new design for millimeter-wave Gunn oscillators has been developed, yielding a mechanical tuning range of about 15 GHz (70-85 GHz) and an output power up to 16 mW. The GaAs Gunn oscillator is tuned at the fundamental frequency (Q-band) in a crossed-waveguide resonator. In addition the output frequency of the Gunn oscillator is phase-locked by an active servo loop to an atomic clock.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"41 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":"121762426","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.1983.333190
M. Malkomes, H. Schmitt
The design and performance of a receiving 8-element microstrip antenna array for X-band operation is discussed. A new phase and amplitude control concept using electronically tunable antenna loads is presented which has been employed in the design of a planar phased array antenna with integrated control network.
{"title":"A New Amplitude and Phase Control Concept for Microstrip Phased Array Antennas","authors":"M. Malkomes, H. Schmitt","doi":"10.1109/EUMA.1983.333190","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333190","url":null,"abstract":"The design and performance of a receiving 8-element microstrip antenna array for X-band operation is discussed. A new phase and amplitude control concept using electronically tunable antenna loads is presented which has been employed in the design of a planar phased array antenna with integrated control network.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"114 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":"121956287","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.1983.333263
I. Lindell, M. Oksanen
A novel stationary functional is introduced for the analysis of open dielectric waveguides with transverse and/or longitudinal anisotropy. The functional is applicable to arbitrary dielectric and anisotropic profiles. As an example it is applied for two types of anisotropic optical fibers, one with anisotropic core and isotropic cladding and the other with both core and cladding anisotropic.
{"title":"Variational Method for Anisotropic Dielectric Waveguides","authors":"I. Lindell, M. Oksanen","doi":"10.1109/EUMA.1983.333263","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333263","url":null,"abstract":"A novel stationary functional is introduced for the analysis of open dielectric waveguides with transverse and/or longitudinal anisotropy. The functional is applicable to arbitrary dielectric and anisotropic profiles. As an example it is applied for two types of anisotropic optical fibers, one with anisotropic core and isotropic cladding and the other with both core and cladding anisotropic.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"174 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":"125238771","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.1983.333266
N. H. Sabhnani, B. G. Rao
Assuming a quasi-TEM mode of wave propagation and using Conformal Mapping Technique, simple, closed-form and accurate expressions have been arrived at for the Offset - Parallel Strip Transmission Line (abbrv. Offset-PSTL) in free space. A model has been proposed for evaluating the effective dielectric constant of the Offset-PSTL photo-etched on the dielectric sheet.
{"title":"Analysis of a Novel Offset Parallel Strip Transmission Line on a Dielectric Substrate","authors":"N. H. Sabhnani, B. G. Rao","doi":"10.1109/EUMA.1983.333266","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333266","url":null,"abstract":"Assuming a quasi-TEM mode of wave propagation and using Conformal Mapping Technique, simple, closed-form and accurate expressions have been arrived at for the Offset - Parallel Strip Transmission Line (abbrv. Offset-PSTL) in free space. A model has been proposed for evaluating the effective dielectric constant of the Offset-PSTL photo-etched on the dielectric sheet.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"24 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":"126450846","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.1983.333271
B. Vowinkel, K. Gruner, H. Suss, W. Reinert
A high-resolution airborne imaging system has been developed that uses cryogenic receiver modules at 90 and 140 GHz. They consist of Schottky-barrier mixers followed by GaAs-FET IF amplifiers. The DSB receiver noise temperatures are 210 K for the 90 GHz and 250 K for the 140 GHz system. The instantaneous bandwidth is 2.5 GHz for both front-ends. Results of some flight tests are presented.
{"title":"Airborne Imaging System using Cryogenic Receiver Modules at 90 and 140 GHz","authors":"B. Vowinkel, K. Gruner, H. Suss, W. Reinert","doi":"10.1109/EUMA.1983.333271","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333271","url":null,"abstract":"A high-resolution airborne imaging system has been developed that uses cryogenic receiver modules at 90 and 140 GHz. They consist of Schottky-barrier mixers followed by GaAs-FET IF amplifiers. The DSB receiver noise temperatures are 210 K for the 90 GHz and 250 K for the 140 GHz system. The instantaneous bandwidth is 2.5 GHz for both front-ends. Results of some flight tests are presented.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"22 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":"114030297","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.1983.333232
E. Rammos
A new type of planar antenna using low loss Suspended Substrate Lines (S.S.L.) has been studied for 12 GHz satellite TV reception. The design and optimisation of the S.S.L. feed network and of the antenna element are presented. A 4 × 4 element planar array using this design is described giving better than 2:1 VSWR in the frequency range of 11-13 GHz. Its gain of about 22 dB from 11.6 to 12.6 GHz gives an antenna efficiency lying between 90% and 70% in the above mentioned bandwidth.
{"title":"A New Wideband, High Gain Suspended Substrate Line Planar Array for 12 GHz Satellite T.V.","authors":"E. Rammos","doi":"10.1109/EUMA.1983.333232","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333232","url":null,"abstract":"A new type of planar antenna using low loss Suspended Substrate Lines (S.S.L.) has been studied for 12 GHz satellite TV reception. The design and optimisation of the S.S.L. feed network and of the antenna element are presented. A 4 × 4 element planar array using this design is described giving better than 2:1 VSWR in the frequency range of 11-13 GHz. Its gain of about 22 dB from 11.6 to 12.6 GHz gives an antenna efficiency lying between 90% and 70% in the above mentioned bandwidth.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"78 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":"126161797","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.1983.333276
Zhou Zheng-ou, Ding Yi-Yuan, Gong Yao-huan, Huang Shun-ji
This paper describes noncontact measurements of the permittivity of a smooth convex target. Two methods are presented. The first one is developed by modifying Erteza and Doran's method[l]. The second one is measuring the reflection coefficient of the target and then evaluating the desired permittivity. Both methods are implemented in the open with a S-band bistatic radar. The experimental results are in good agreement with those obtained by the perturbation method.
{"title":"Noncontact Measurements of Permittivity of a Smooth Convex Target with bistatic Radar","authors":"Zhou Zheng-ou, Ding Yi-Yuan, Gong Yao-huan, Huang Shun-ji","doi":"10.1109/EUMA.1983.333276","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333276","url":null,"abstract":"This paper describes noncontact measurements of the permittivity of a smooth convex target. Two methods are presented. The first one is developed by modifying Erteza and Doran's method[l]. The second one is measuring the reflection coefficient of the target and then evaluating the desired permittivity. Both methods are implemented in the open with a S-band bistatic radar. The experimental results are in good agreement with those obtained by the perturbation method.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"87 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":"124955126","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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