Pub Date : 1983-09-01DOI: 10.1109/EUMA.1983.333225
Gerhard Heina
General design considerations for a carrier supply providing a two stage converter for satellite communication systems are discussed. A simple solution by means of a new crystal type and high speed digital dividers is described. The performances of IF and RF local oscillator using this new elements are presented.
{"title":"Modern Techniques in Converter Carrier Supply Generators for Satellite Communication Systems","authors":"Gerhard Heina","doi":"10.1109/EUMA.1983.333225","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333225","url":null,"abstract":"General design considerations for a carrier supply providing a two stage converter for satellite communication systems are discussed. A simple solution by means of a new crystal type and high speed digital dividers is described. The performances of IF and RF local oscillator using this new elements are presented.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"8 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":"133027046","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.1983.333308
P. McAllister
The paper details the accuracy improvements in both instrumentation and calibration of power sensor errors. New measurement methods for determintation of calibration factor will be described which gives improvement in uncertainty over current methods. New instrumentation giving better accuracy and high stability with temperature will be discussed. The use of microprocessor control and numerical correction of sensor inaccuracies now make possible more accurate Power measuring instruments. Existing Power meters are slow and suffer from errors such as linearity. The microprocessor correction described greatly reduces these errors and allows many different types of sensors to be used including millimetric sensors.
{"title":"Accuracy Improvements in Power Measurements","authors":"P. McAllister","doi":"10.1109/EUMA.1983.333308","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333308","url":null,"abstract":"The paper details the accuracy improvements in both instrumentation and calibration of power sensor errors. New measurement methods for determintation of calibration factor will be described which gives improvement in uncertainty over current methods. New instrumentation giving better accuracy and high stability with temperature will be discussed. The use of microprocessor control and numerical correction of sensor inaccuracies now make possible more accurate Power measuring instruments. Existing Power meters are slow and suffer from errors such as linearity. The microprocessor correction described greatly reduces these errors and allows many different types of sensors to be used including millimetric sensors.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"123 9 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":"116818912","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.1983.333280
R. Langley, D. Papaioannou
An automatic antenna radiation pattern measurement system based on a microcomputer is presented. Stepper motors, directly controlled by the computer, are used to drive elevation, azimuth and polarisation positioners. During measurement the computer programs the signal source, collects pattern data from the microwave receiver and converts, stores and displays it in a variety of formats. Copolar and crosspolar patterns in amplitude and phase may be measured. Software packages for radiation pattern measurement and contour plotting are described and typical results presented. This low cost facility is accurate and versatile and software can be written for many applications.
{"title":"Microcomputer Controlled Antenna Radiation Pattern Measurements","authors":"R. Langley, D. Papaioannou","doi":"10.1109/EUMA.1983.333280","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333280","url":null,"abstract":"An automatic antenna radiation pattern measurement system based on a microcomputer is presented. Stepper motors, directly controlled by the computer, are used to drive elevation, azimuth and polarisation positioners. During measurement the computer programs the signal source, collects pattern data from the microwave receiver and converts, stores and displays it in a variety of formats. Copolar and crosspolar patterns in amplitude and phase may be measured. Software packages for radiation pattern measurement and contour plotting are described and typical results presented. This low cost facility is accurate and versatile and software can be written for many applications.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"20 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":"128226002","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.1983.333213
Niels Pedersen, Falsig
In recent years a lot of interest has been focused on the Josephson junction as a microwave device in the millimeter and submillimeter range. The primary reason for this interest is that it has been verified experimentally that the Josephson junction makes the receiver with the lowest noise temperature in a large part of the microwave spectrum. Already now radio astronomy receivers with a Josephson junction as the sensitive element have been tested sucessfully and total receiver noise temperatures as low as 150 K have been realized in the 40-120 GHz range. Although the interest is now focused largely on the so-called SIS mixer,the Josephson junction being a highly nonlinear device may be used also as a parametric amplifier. For both mixers and parametric amplifiers, modes of operation exist, in which the pump (or local oscillator) is inherent in the junction; alternatively, another Josephson junction may be used as a microwave generator. That unique feature becomes attractive in the higher end of the microwave spectrum where sources are typically bulky and expensive. The development of practically usable Josephson microwave elements is still being pursued actively around the world. A noticeable trend now is that this research is increasingly being transferred from the physics laboratories to the microwave community; the progress that has taken place has also benefitted much from large research projects aimed at developping a new generation of computers based on Josephson junctions. Several good recent reviews of the field existsl12'3'4'5'6 and may serve as an introduction for those who wish more information.
{"title":"RF Applications of Superconducting Tunneling Devices","authors":"Niels Pedersen, Falsig","doi":"10.1109/EUMA.1983.333213","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333213","url":null,"abstract":"In recent years a lot of interest has been focused on the Josephson junction as a microwave device in the millimeter and submillimeter range. The primary reason for this interest is that it has been verified experimentally that the Josephson junction makes the receiver with the lowest noise temperature in a large part of the microwave spectrum. Already now radio astronomy receivers with a Josephson junction as the sensitive element have been tested sucessfully and total receiver noise temperatures as low as 150 K have been realized in the 40-120 GHz range. Although the interest is now focused largely on the so-called SIS mixer,the Josephson junction being a highly nonlinear device may be used also as a parametric amplifier. For both mixers and parametric amplifiers, modes of operation exist, in which the pump (or local oscillator) is inherent in the junction; alternatively, another Josephson junction may be used as a microwave generator. That unique feature becomes attractive in the higher end of the microwave spectrum where sources are typically bulky and expensive. The development of practically usable Josephson microwave elements is still being pursued actively around the world. A noticeable trend now is that this research is increasingly being transferred from the physics laboratories to the microwave community; the progress that has taken place has also benefitted much from large research projects aimed at developping a new generation of computers based on Josephson junctions. Several good recent reviews of the field existsl12'3'4'5'6 and may serve as an introduction for those who wish more information.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"12 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":"133283342","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.1983.333253
E. Bastida, G. Donzelli, G. Ghione, C. Naldi
A new class of microwave integrated circuits is presented, having definite advantages over both the hybrid and the fully monolithic solutions. A theoretical analysis correlating the S parameters of a flip-chip mounted FET device with those of a fully monolithic device is then reported, which permits to develop a straightforward and very efficient testing technique for monolithic ICs. Practical examples of the new circuits and of the testing technique are finally described.
{"title":"A Quasi-Monolithic Approach to Microwave Ga-As Integrated Circuits","authors":"E. Bastida, G. Donzelli, G. Ghione, C. Naldi","doi":"10.1109/EUMA.1983.333253","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333253","url":null,"abstract":"A new class of microwave integrated circuits is presented, having definite advantages over both the hybrid and the fully monolithic solutions. A theoretical analysis correlating the S parameters of a flip-chip mounted FET device with those of a fully monolithic device is then reported, which permits to develop a straightforward and very efficient testing technique for monolithic ICs. Practical examples of the new circuits and of the testing technique are finally described.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"20 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":"133863102","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.1983.333316
M. Niemeyer, W. Schwarz, B. Sommer
Measurements have been carried out on a 60 km path in the 5 and 15 GHz range. The analysis of the records revealed two important results: First, the statistical consideration of the long term experiments yields to a prediction about the availability of digital radio links as a function of the occupied bandwidth provided that no additional diversity measures are used. Second, the analysis of the determined coherence bandwidth allows a physical interpretation of the interference phenomena. The model of a dominating 3-path propagation found by these experiments could be proved with the aid of a high-directive tracked antenna system in the 15 GHz frequency range.
{"title":"A New Method to Minimize the Multipath Effects of Digital Microwave Lossystems, Based on Wideband Measurements at 5 and 15 GHz","authors":"M. Niemeyer, W. Schwarz, B. Sommer","doi":"10.1109/EUMA.1983.333316","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333316","url":null,"abstract":"Measurements have been carried out on a 60 km path in the 5 and 15 GHz range. The analysis of the records revealed two important results: First, the statistical consideration of the long term experiments yields to a prediction about the availability of digital radio links as a function of the occupied bandwidth provided that no additional diversity measures are used. Second, the analysis of the determined coherence bandwidth allows a physical interpretation of the interference phenomena. The model of a dominating 3-path propagation found by these experiments could be proved with the aid of a high-directive tracked antenna system in the 15 GHz frequency range.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"9 23 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":"122098549","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.1983.333315
H.-G. Gerst
The philosophy of the mechanical and electrical design of the radio equipment covering the frequency ranges 3.9, 6.7, 11.2 GHz is presented and details of some important subunits are discussed. Furthermore, measurement results of bit error rate depending on noise, linearity and selective fading are given.
{"title":"A Family of 16 QAM Radio Systems for Transmission of 140 MBIT/S","authors":"H.-G. Gerst","doi":"10.1109/EUMA.1983.333315","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333315","url":null,"abstract":"The philosophy of the mechanical and electrical design of the radio equipment covering the frequency ranges 3.9, 6.7, 11.2 GHz is presented and details of some important subunits are discussed. Furthermore, measurement results of bit error rate depending on noise, linearity and selective fading are given.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"30 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":"125712484","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.1983.333223
S. Yun, T. Itoh
A new distributed millimeter-wave isolator is proposed. The analysis is based on the transverse resonance and the mode matching technique. We obtained a good agreement between the theoretical and the experimental results.
{"title":"A Novel Distributed Millimeter-Wave Isolator","authors":"S. Yun, T. Itoh","doi":"10.1109/EUMA.1983.333223","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333223","url":null,"abstract":"A new distributed millimeter-wave isolator is proposed. The analysis is based on the transverse resonance and the mode matching technique. We obtained a good agreement between the theoretical and the experimental results.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"14 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":"123424210","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.1983.333286
H. Brand, E. Kreutzer, M. Vogel
The design principles for real time microwave imaging systems with multiple-target capability in close range applications are discussed. Target movements in usual traffic situations should be recognized even in severe weather conditions. An experimental approach to the problem leads to a quasi-optical mm-wave solution combined with a FM-radar- signal processing to obtain image data of azimuth and range.
{"title":"Realtime 70 GHZ-Imaging System for Close Range Applications","authors":"H. Brand, E. Kreutzer, M. Vogel","doi":"10.1109/EUMA.1983.333286","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333286","url":null,"abstract":"The design principles for real time microwave imaging systems with multiple-target capability in close range applications are discussed. Target movements in usual traffic situations should be recognized even in severe weather conditions. An experimental approach to the problem leads to a quasi-optical mm-wave solution combined with a FM-radar- signal processing to obtain image data of azimuth and range.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"19 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":"128949895","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.1983.333246
A. Rendel, A. Omar
Two oscillator prototype circuits were developed in a circuit technique which combines the advantages of microstrip technique and waveguide-below-cutoff technique. The prototypes can be equipped with Gunn- or Impatt-diodes and are suitable for multi-device operation. Broadband mechanical and electronical tunability is achieved.
{"title":"Oscillators in a Hybrid Microstrip Technique","authors":"A. Rendel, A. Omar","doi":"10.1109/EUMA.1983.333246","DOIUrl":"https://doi.org/10.1109/EUMA.1983.333246","url":null,"abstract":"Two oscillator prototype circuits were developed in a circuit technique which combines the advantages of microstrip technique and waveguide-below-cutoff technique. The prototypes can be equipped with Gunn- or Impatt-diodes and are suitable for multi-device operation. Broadband mechanical and electronical tunability is achieved.","PeriodicalId":105436,"journal":{"name":"1983 13th European Microwave Conference","volume":"215 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":"122436332","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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