{"title":"Exact Green Functions for Microstrip Antenna Analysis","authors":"I. Lindell, K. Nikoskinen, A. Hujanen","doi":"10.1109/EUMA.1988.333950","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333950","url":null,"abstract":"Exact image theory, recently introduced for the analysis of different electromagnetic problems involving planar boundaries between homogeneous media, is applied for the analysis of the microstrip geometry. It is shown that, instead of making direct use of image currents for the problem, two scalar Green functions can be defined in terms of the image currents, to speed up the actual calculation of the integrals in the microstrip problem. With the aid of these Green functions, the analysis of microstrip antennas can be performed with almost the same ease as free-space problems. Only one of the Green functions is seen to be singular with an integrable singularity, roughly the same as for the free-space Green function.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130939537","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}
J. Hinken, J. Niemeyer, R. Fromknecht, M. Klinger, R. Popel, W. Richter, D. Schiel, U. Stumper, E. Vollmer, W. Engelland, L. Grimm
{"title":"Computer-Controlled MM- and Sub-MM Wave Josephson Spectrometer with a Planar Integrated Front End","authors":"J. Hinken, J. Niemeyer, R. Fromknecht, M. Klinger, R. Popel, W. Richter, D. Schiel, U. Stumper, E. Vollmer, W. Engelland, L. Grimm","doi":"10.1109/EUMA.1988.333813","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333813","url":null,"abstract":"MM-wave spectrometers and receivers with wide tuning bandwidths are needed for the analysis of gases as well as for radioastronomy and EMC-measurements. Up to now, broadband Fourier transform spectrometers (FTS) with a high-precision mechanical set-up and movable mirrors or narrow-band microwave spectrum analysers (MSA) with mixers for each waveguide band are used for these purposes. Divin et al. proposed a very sensitive spectrometric method with an extremly wide tuning bandwidth /1/. No mechanical tuning and no changing of mixers is necessary. The dc voltage-current characteristics of a point-contact Josephson junction is deformed by the incident radiation according to the ac Josephson effect. The spectrum of the radiation is obtained by applying an inverse Hilbert transform on the resulting deformation of the dc characteristic. First experiments were performed. A spectrum consisting of a broad single line at 600 GHz was investigated /1/ and two narrow lines at 68 and 70 GHz were observed simultaneously in /2/. A planar integrated front end, compared to the three-dimensional set-ups used in /1/ and /2/ has the following advantages: - greater tuning bandwidth - better reproducibility - integration of a planar Josephson junction, which is mechanically more stable and needs no adjustment after each temperature cycle. - reliable contacts between the components of the front end. Therefore, a mm-and sub-mm wave Josephson spectrometer with a planar integrated front end was designed and built. This is described in this paper.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131647833","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":"Measurement of Layer Structures Interface Position using Microwave Phase-Frequency Method","authors":"B. V. Lunkin, D. V. Khablov","doi":"10.1109/EUMA.1988.333883","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333883","url":null,"abstract":"The paper suggests an approach to the parameter analysis of objects presentable by an equivalent scheme in the form of a plane-parallel layer structure. The approach rests upon the use of the phase-frequency method aimed at processing amplitude frequency characteristics of the reflected signal.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131261474","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 New Method for Computing Parameters of Coupling and Radiating Waveguide Slots","authors":"G. Lodone","doi":"10.1109/EUMA.1988.333832","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333832","url":null,"abstract":"Waveguide slots are widely used as coupling and radiating structures of array antennas ([1],[4],[7]). In the design practice one usually has to cope with some strange behaviour that often arises from undesired coupling. In order to predict unwanted results, a computational tool aimed toward this purpose can be very useful. To be effective such a tool must provide a straightforward means to model not only radiating slots but the coupling ones as well. This is mandatory in order to expand the simulation capability to the whole antenna, and not limit oneself to radiating subarray. This work outlines a method that starting from a unifying point of view could deal with all these structures, making easier the building of efficient computing routines.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124103802","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":"Desktop Computer Models for Coplanar Lines Laid on Semiconductor Layers for C.A.D.","authors":"R. Delrue, C. Seguinot, P. Pribetich, P. Kennis","doi":"10.1109/EUMA.1988.333963","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333963","url":null,"abstract":"For CAD simulation, it is necessary to determine the frequency behaviour of coplanar lines laid on semiconductor substrates. Exact analysis can be performed by using numerical technics such as S.D.A. or Mode Matching. However such analysis can not be included in C.A.D. programs. For this purpose, we present an original model for coplanar lines laid on semiconductor substrates, which take into account both the influence of thickness metallization and dielectric cap layer. The validity of our models is tested by comparison with mode matching and S.D.A. results.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123011457","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":"Evanescent Mode Waveguide Bandpass Filter with Non-Touching E-Plane Fins and Capacitive Iris","authors":"K. Kong, Y. Nikawa, T. Itoh","doi":"10.1109/EUMA.1988.333931","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333931","url":null,"abstract":"A design method based on an optimization is presented for an evanescent mode waveguide bandpass filter with non-touching E-plane fins. Broadband bandpass filters combined with a capacitive iris with a passband as wide as 15% are designed by this method. The theoretical design has been confirmed by the measurement of fabricated filters in the Ka band.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123043599","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 Cell-Based Wideband Monolithic Upconverter","authors":"F. Ali, S. Moghe, R. Ramachandran, A. Podell","doi":"10.1109/EUMA.1988.333901","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333901","url":null,"abstract":"A fully monolithic wideband upconverter has been developed and tested using a cell-based design approach. This upconverter consists of an RF amplifier cell, a broadband diode mixer cell, and an LO buffer amplifier cell. The chip (48 × 96 mils) has been tested at different LO frequencies between 9 and 14 GHz with a swept IF from 300 MHz to 1 GHz, and typically has 2 dB of conversion loss for upconverted output across the 8 to 15 GHz band. It has 4.8 dBm of output, 1 dB compression power at 10 GHz LO (with only 4 dBm of LO Power), and 1 GHz input frequency.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122560225","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 Absolute Determination of Near Millimetre Wave Power in Free Space","authors":"D. G. Moss, J. Birch, D. H. Martin, G. Poulson","doi":"10.1109/EUMA.1988.333898","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333898","url":null,"abstract":"An absolute power measuring facility for the calibration of free-field power meters at near millimetre wavelengths, is described. Accuracy is two percent at the one milliwatt level, a tenfold improvement over present free field methods. The measuring principle is based on a photo-acoustic cell and is absolutely calibrated by substitution of low frequency a.c. power. This calibration facility is available at the National Physical Laboratory, Teddington, England.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129015763","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":"Microstrip Antenna and Phased Array","authors":"W. J. Krzysztofik","doi":"10.1109/EUMA.1988.333953","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333953","url":null,"abstract":"A systematic approach to analysis of notch-fed rectangular microstrip raditing element and its application to phased array is discussed. A modular design method of medium gain microstrip array is described. Design formulas and plots, sufficiently accurate to specify important design properties of the proposed antenna are included.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115946466","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 HEMT Monolithic Double Channel Attenuator with Broadband Characteristics and Wide Dynamic Range","authors":"J. Cazaux, D. Pavlidis, G. Ng, M. Tutt","doi":"10.1109/EUMA.1988.333940","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333940","url":null,"abstract":"Double Channel HEMT's are used as variable resistor elements in a bridged-T attenuator with broadband characteristics (0.5-12GHz), and wide dynamic range (12-16dB). A small insertion loss (2.8dB minimum) is obtained with the help of the heterojunction approach which results in smaller ON-channel resistances than MESFET technology.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125479990","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}