{"title":"Exact Design of the Marchand Balun","authors":"J. Cloete","doi":"10.1109/EUMA.1979.332751","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332751","url":null,"abstract":"Exact methods for the synthesis of commensurate length distributed networks are used to compute the circuit element values of three implementations of the Marchand balun. One of these is a new implementation which incorporates a quarter-wave line at both the balanced and unbalanced ports. As a result, the practical operating range of the Marchand balun is expanded without compromising on its inherent compact physical realization. Graphs of the element values of the second and third types have been prepared to simplify the design of the balun for a wide range of load resistance and bandwidth combinations.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124969872","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}
{"title":"13 GHz FET Negative Resistance 0.5 W Amplifier","authors":"S. Nicotra","doi":"10.1109/EUMA.1979.332718","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332718","url":null,"abstract":"A two-stage 13 GHz negative resistance amplifier utilizing commercially available GaAs FETs in a sealed container has been realized. The amplifier performs a 0.5 W output power, a 16 dB linear gain, an AM to PM conversion cf less than 3°/dB in the instantaneous bandwidth of 500 MHz. The estimated MTTF exceeds 106 hours. Its application in a 34 Mbit/s 4-PSK 13 GHz radio link is being described.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"1588 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129184393","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}
{"title":"Printed-Probe Hybrid Coupler for the 3-mm Band","authors":"P. Meier","doi":"10.1109/EUMA.1979.332744","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332744","url":null,"abstract":"A printed-circuit, 7-element, 3-dB hybrid coupler has been developed for application to low - cost systems operating in the 3-mm atmospheric window. Based on a computer-aided analysis, a prototype coupler has been constructed and tested. Across a 3.7-GHz band centered at 94 GHz, the measured isolation is 22 dB or better, and the coupling is 3.4±0.9 dB. Such a coupler can be integrated with other planar circuits to form a variety of components useful in advanced high-resolution systems.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128636183","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}
{"title":"Pseudo-Elliptical Phase-Equalized Filter","authors":"L. F. Franti, G. M. Paganuzzi","doi":"10.1109/EUMA.1979.332736","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332736","url":null,"abstract":"The paper considers a filter with double transmission zeros at both real and imaginary frequencies. The new approach allows satisfactory phase equalization for the stated out-of-band attenuation without increasing the filter degree as would be required for a linear phase filter.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116487437","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}
{"title":"Comparative Study of Bipolar, FET and Gunn X Band Oscillators","authors":"M. Fache, M. Quentel","doi":"10.1109/EUMA.1979.332648","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332648","url":null,"abstract":"Solid state oscillators are widely used in microwave equipments and users are becoming more and more hard to please especially where reliability and spectral purity are concerned. The progress recently accomplished in the development of bipolar si transistors with a maximum oscillation frequency greater than 12 GHz enables us to consider the realization of bipolar transistor sources and VCO for X band. The author described the realization of an original 10 GHz miniaturized bipolar VCO with a particular low frequency noise level (less than 90 dB at 50 KHz from the carrier in a 1 Hz bandwidth). The performances of this device are enumerated and compared to those of more traditional devices : Gunn oscillators and FET - AsGa oscillators.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125985591","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}
{"title":"The Six-Port and the Microprocessor in Microwave Measurements","authors":"A. Cullen","doi":"10.1109/EUMA.1979.332679","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332679","url":null,"abstract":"A tutorial introduction to six-port measurement techniques is attempted. For simplicity, the general network analyser using a dual six-port system is excluded; a single six-port used as a reflectometer represents the scope of this paper. Emphasis is on basic concepts rather than practical details. It is shown, however, that a high degree of accuracy can be achieved in practice. Some aspects of the design of a six-port measuring system are described, and some outstanding problems are indicated.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125147798","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}
{"title":"A Simple Radiation Model for Micristrip Antennas","authors":"M. T. Birand","doi":"10.1109/EUMA.1979.332683","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332683","url":null,"abstract":"An approach that uses a combined theoretical and experimental best-fit technique for developing radiation models for patch type microstrip antennas is proposed. Far-field expressions involving two major parameters relating the equivalent electric and magnetic type sources in the model are derived. The appropriate values of these parameters are obtained by comparing the computed patterns with the measured ones. Using the proposed model, some antenna characteristics may be more accurately determined compared to the results of some previous studies.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125171942","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}
{"title":"Fast Rise Time InP Oscillators Employing Cavity Stabilisation and Pulsed Priming Techniques","authors":"D.C. Smith, R. L. Tebbenham","doi":"10.1109/EUMA.1979.332763","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332763","url":null,"abstract":"","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131984593","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}
{"title":"Switching & Frequency Conversion using Dual-Gate FETs","authors":"W. Tsai, S. Paik, B. Hewitt","doi":"10.1109/EUMA.1979.332720","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332720","url":null,"abstract":"Dual-gate FETs may be used for a variety of circuits designed for non-amplifying functions, which have been performed in the past by two-terminal devices. Examples of dual-gate FET circuits described are: a high-speed broadband switch, a high-speed phase modulator, and a frequency up-converter.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133786963","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}
{"title":"The Influence of Harmonic Injection on Power, Efficiency and Stability of Trapatt Amplifiers","authors":"F. Kappeler","doi":"10.1109/EUMA.1979.332765","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332765","url":null,"abstract":"It is shown by an analytical model, that power and efficiency of TRAPATT diodes are limited by the fact, that the optimum diode impedances cannot be matched with a passive load circuit at some harmonics of the oscillation. These restrictions can be overcome by injection of a small amount of power at the respective harmonics. The experimental verification of this method has been performed with an unique lumped element circuit. By injection of the third harmonic fundamental power and efficiency could almost be doubled. At 1,7 GHz a peak power of 230 Wwith a total efficiency of 46% has been achieved. The maximum gain (from the third to the first harmonic) was 23 dB. The good symmetry of the output spectrum indicates high phase and amplitude stability.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131524990","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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