Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335709
W. Menzel
Suspended stripline has proven to be a low loss transmission line, especially for filters. Making full use of both sides of the substrate, including standard stripline, coupled stripline and microstrip, very broadband components can be realized. This is demonstrated by a 2.5 GHz low-pass filter with high isolation up to at least nearly 17 GHz, high-pass filters up to 30 GHz and a broadband (3.5-7.5 GHz) bandpass without higher pass-bands up to 40 GHz.
{"title":"Broadband Filter Circuits using an Extended Suspended Substrate Transmission Line Configuration","authors":"W. Menzel","doi":"10.1109/EUMA.1992.335709","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335709","url":null,"abstract":"Suspended stripline has proven to be a low loss transmission line, especially for filters. Making full use of both sides of the substrate, including standard stripline, coupled stripline and microstrip, very broadband components can be realized. This is demonstrated by a 2.5 GHz low-pass filter with high isolation up to at least nearly 17 GHz, high-pass filters up to 30 GHz and a broadband (3.5-7.5 GHz) bandpass without higher pass-bands up to 40 GHz.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121669781","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335692
M. Celuch-Marcysiak, W. Gwarek
In view of recent research showing equivalence between various versions of the FD-TD and TLM methods we propose that comparative studies of time - domain methods be now directed towards distinguishing Expanded Node modelling and Symmetrical Condensed Node modelling. Each of these types of modelling can be used to formulate algorithms in either FD-TD or TLM notations. The choice of notation influences effectiveness of the analysis, but accuracy is essentially determined by the type of modelling. We derive an analytic function which describes dispersion relations for the Symmetrical Condensed Node (SCN) modelling. Our formulation provides the unprecedented basis for thorough comparison with the expanded node modelling, in terms of overall accuracy, reliability and convergence properties. Theoretical predictions are verified on several examples. Detailed examination of inherent computational efficiency of the ExpN and SCN models for 2-D, 2-DV and 3-D problems is supplemented.
{"title":"On the Aspects of Selecting the Symmetrical Condensed Node or the Expanded Node Modelling for Electromagnetic Simulations","authors":"M. Celuch-Marcysiak, W. Gwarek","doi":"10.1109/EUMA.1992.335692","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335692","url":null,"abstract":"In view of recent research showing equivalence between various versions of the FD-TD and TLM methods we propose that comparative studies of time - domain methods be now directed towards distinguishing Expanded Node modelling and Symmetrical Condensed Node modelling. Each of these types of modelling can be used to formulate algorithms in either FD-TD or TLM notations. The choice of notation influences effectiveness of the analysis, but accuracy is essentially determined by the type of modelling. We derive an analytic function which describes dispersion relations for the Symmetrical Condensed Node (SCN) modelling. Our formulation provides the unprecedented basis for thorough comparison with the expanded node modelling, in terms of overall accuracy, reliability and convergence properties. Theoretical predictions are verified on several examples. Detailed examination of inherent computational efficiency of the ExpN and SCN models for 2-D, 2-DV and 3-D problems is supplemented.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130136784","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335775
S. Nylund, F. Paoloni
Null steering array antennas require proper selection of the amplitude and phase on the excitation of each element. This paper describes a microstrip PIN-diode circuit that is capable of changing amplitude and phase at X-band frequencies. The device consists of a pair of variable attenuators and one-bit 180°phase-shifters. Digital control circuits have been built that use pre-stored calibration data. Measurements indicate that accurate attenuation and phase change can be obtained over all four quadrants of the complex plane.
{"title":"Digitally Controlled 10.5 GHz Complex Weight Circuit for Null Steering Arrays","authors":"S. Nylund, F. Paoloni","doi":"10.1109/EUMA.1992.335775","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335775","url":null,"abstract":"Null steering array antennas require proper selection of the amplitude and phase on the excitation of each element. This paper describes a microstrip PIN-diode circuit that is capable of changing amplitude and phase at X-band frequencies. The device consists of a pair of variable attenuators and one-bit 180°phase-shifters. Digital control circuits have been built that use pre-stored calibration data. Measurements indicate that accurate attenuation and phase change can be obtained over all four quadrants of the complex plane.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131262070","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335781
J. Romeu, L. Jofre
Cylindrical Near to far field antenna transformation is expressed as a plane wave synthesis problem where a plane wave is produced by a cylindrical current distribution that encloses the Antenna Under Test (AUT). The current distribution that produces the plane wave is directly derived from the near to far field transformation algorithm.
{"title":"Truncation Errors in Cylindrical Near to Far Field Transform. A Plane Wave Synthesis Approach","authors":"J. Romeu, L. Jofre","doi":"10.1109/EUMA.1992.335781","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335781","url":null,"abstract":"Cylindrical Near to far field antenna transformation is expressed as a plane wave synthesis problem where a plane wave is produced by a cylindrical current distribution that encloses the Antenna Under Test (AUT). The current distribution that produces the plane wave is directly derived from the near to far field transformation algorithm.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133960249","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335898
Zang ding, Hu Jiadong
A multiple-function instrument for medical treatment is described in this paper. A special type microstrip antenna is adopted. The radiations of micromave and laser beams are merged into a single direction to stimulate the acupuncture points of human body. These two kinds of radiations work in coordination with each other, so that the curative effect is notable. The instrument is composed of a He-Ne laser, a laser beam which is called "light needle", a microwave generator, and a ring type microstrip antenna which merges the microwave and laser energy into one. Since microwave-laser beam technique has no pain effect in clinical practice, it has some advantages over the traditional "silver needle". Therefore this kind of medical instrument is of practical values.
{"title":"A Microwave-Laser Instrument for Medical Treatment","authors":"Zang ding, Hu Jiadong","doi":"10.1109/EUMA.1992.335898","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335898","url":null,"abstract":"A multiple-function instrument for medical treatment is described in this paper. A special type microstrip antenna is adopted. The radiations of micromave and laser beams are merged into a single direction to stimulate the acupuncture points of human body. These two kinds of radiations work in coordination with each other, so that the curative effect is notable. The instrument is composed of a He-Ne laser, a laser beam which is called \"light needle\", a microwave generator, and a ring type microstrip antenna which merges the microwave and laser energy into one. Since microwave-laser beam technique has no pain effect in clinical practice, it has some advantages over the traditional \"silver needle\". Therefore this kind of medical instrument is of practical values.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122872394","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335841
C. Lhiaubet, G. Cottard, J. Ciccotelli, J. Portala, J. Bolomey
This paper has two main-purposes. First of all, it presents recent technological developments of microwave linear sensors based on the Modulated Scattering Technique (MST). Secondly, it reports results of in-situ assessments conducted with such sensors on wood and paper materials. As a conclusion, the impact of the availability of such microwave multipoint sensors is analysed.
{"title":"On-Line Control in Wood and Paper Industries by means of Rapid Microwave Linear Sensors","authors":"C. Lhiaubet, G. Cottard, J. Ciccotelli, J. Portala, J. Bolomey","doi":"10.1109/EUMA.1992.335841","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335841","url":null,"abstract":"This paper has two main-purposes. First of all, it presents recent technological developments of microwave linear sensors based on the Modulated Scattering Technique (MST). Secondly, it reports results of in-situ assessments conducted with such sensors on wood and paper materials. As a conclusion, the impact of the availability of such microwave multipoint sensors is analysed.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124224533","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335721
N. Keen
We review the physical phenomena associated with environmental measurements at millimeter and submillimeter wavelengths, and present some technical solutions.
我们回顾了与毫米波和亚毫米波环境测量相关的物理现象，并提出了一些技术解决方案。
{"title":"Environmental Measurements at Millimeter and Submillimeter Wavelengths","authors":"N. Keen","doi":"10.1109/EUMA.1992.335721","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335721","url":null,"abstract":"We review the physical phenomena associated with environmental measurements at millimeter and submillimeter wavelengths, and present some technical solutions.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"298 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129299884","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335897
V. Ponomaryov, A. I. Gorb, O. A. Ksenofontov
The method of tropospheric refractive index height profile remote sensing by radiosignal integral Doppler frequency measurements and method of tropospheric statistical parameter height profile remote sensing by refractometry phase measurements were explored byf conducted experiments. Numerical analysis of remote sensing input data model and stable inverse algorithms was executed to choose optimal algorithm of tropospheric refractive index height profile restoration. The accuracy of the estimated statistical parameters was analised in terms of the statistical solutions theory. Restoration experimental results of refractive index height profile and structural constant height profile are cited.
{"title":"Tropospheric Remote Sensing by Radiodata","authors":"V. Ponomaryov, A. I. Gorb, O. A. Ksenofontov","doi":"10.1109/EUMA.1992.335897","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335897","url":null,"abstract":"The method of tropospheric refractive index height profile remote sensing by radiosignal integral Doppler frequency measurements and method of tropospheric statistical parameter height profile remote sensing by refractometry phase measurements were explored byf conducted experiments. Numerical analysis of remote sensing input data model and stable inverse algorithms was executed to choose optimal algorithm of tropospheric refractive index height profile restoration. The accuracy of the estimated statistical parameters was analised in terms of the statistical solutions theory. Restoration experimental results of refractive index height profile and structural constant height profile are cited.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128732426","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335868
G. Leuzzi, K. Deiseroth, F. Giannini
Modern non-linear CAD techniques require accurate models of active components for the analysis of non-linear circuits. An improved technique of model extraction from measurements is presented, which accounts for capacitive parasitics in a more physical way. An improved equivalent circuit of the MESFET results. This technique is especially useful when modelling large power MESFET's.
{"title":"An Improved Method of Parasitic Extraction for Non-Linear Modelling of Microwave Power MESFET's","authors":"G. Leuzzi, K. Deiseroth, F. Giannini","doi":"10.1109/EUMA.1992.335868","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335868","url":null,"abstract":"Modern non-linear CAD techniques require accurate models of active components for the analysis of non-linear circuits. An improved technique of model extraction from measurements is presented, which accounts for capacitive parasitics in a more physical way. An improved equivalent circuit of the MESFET results. This technique is especially useful when modelling large power MESFET's.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115911782","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 : 1992-10-01DOI: 10.1109/EUMA.1992.335834
T. Weller, P. Katehi, W. Mcgrath
A novel design for non-contacting waveguide backshorts, suitable for applications into the Thz frequency range, is described in this paper. The new approach, which has been developed by the Jet Propulsion Laboratory (JPL), circumvents severe machining and mechanical strength difficulties related to the miniaturization of standard microwave backshort designs. The new design consists of a metal bar with rectangular or circular holes cut into it, which is covered with a dielectric (mylar) layer to form a snug fit with the broadwalls of a waveguide. A method of numerical analysis called the mode-matching/space domain integral equation (MMSDIE) technique is described herein, followed by a discussion of measured and theoretical results.
{"title":"A Non-Contacting Waveguide Backshort for Submillimeter Wave Applications","authors":"T. Weller, P. Katehi, W. Mcgrath","doi":"10.1109/EUMA.1992.335834","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335834","url":null,"abstract":"A novel design for non-contacting waveguide backshorts, suitable for applications into the Thz frequency range, is described in this paper. The new approach, which has been developed by the Jet Propulsion Laboratory (JPL), circumvents severe machining and mechanical strength difficulties related to the miniaturization of standard microwave backshort designs. The new design consists of a metal bar with rectangular or circular holes cut into it, which is covered with a dielectric (mylar) layer to form a snug fit with the broadwalls of a waveguide. A method of numerical analysis called the mode-matching/space domain integral equation (MMSDIE) technique is described herein, followed by a discussion of measured and theoretical results.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116842816","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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