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1988 18th European Microwave Conference最新文献

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Feed Scattering in Primary-Fed Reflector Antennas 一次馈电反射天线中的馈电散射
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333860
A. Moldsvor, P. Kildal
{"title":"Feed Scattering in Primary-Fed Reflector Antennas","authors":"A. Moldsvor, P. Kildal","doi":"10.1109/EUMA.1988.333860","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333860","url":null,"abstract":"This paper presents a method to improve the calculation of the directivity and the radiation pattern of a primary-fed reflector antenna, by including the contribution due to multiple reflections between the feed and the reflector. These multiple reflections are controlled by introducing a feed scattering pattern, which is the scattered field from the feed when illuminated by a plane wave. The method is applied to a reflector with a self-supported dipole-feed, showing good agreement with both the measurements and a moment method solution of the complete antenna including the feed as well as the paraboloidal reflector. The results show that the multiple reflections may have stronger effect on the directivity and the cross-polar sidelobe level than the centre blockage has.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"77 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":"115573114","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}
引用次数: 3
Aeronautical Maritime Experimental Transponder on Engineering Test Satellite-V 工程试验卫星v型航空海事实验应答器
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333920
K. Kondo, K. Kosaka, K. Hoshinoo, S. Yamada, N. Futagawa, K. Eishima
{"title":"Aeronautical Maritime Experimental Transponder on Engineering Test Satellite-V","authors":"K. Kondo, K. Kosaka, K. Hoshinoo, S. Yamada, N. Futagawa, K. Eishima","doi":"10.1109/EUMA.1988.333920","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333920","url":null,"abstract":"Japanese Engineering Test Satellite-V (ETS-V) realized an experimental mobile satellite communication system with mobile stations such as ships, aircraft and land mobiles. The transponder which uses L-band for the mobile link on ETS-V is called AMEX(Aeronautical Maritime Experimental Transponder). This article reviews the outlines of AMEX, the characteristics of major components, EMC design and the checkout result on orbit.","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":"124431819","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}
引用次数: 2
A New Radar System for Remote Sensing 一种新的遥感雷达系统
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333890
M. Hallikainen, J. Hyyppa, M. Toikka, T. Tares, J. Haapanen, P. Ahola, J. Pulliainen, K. Leppanen
{"title":"A New Radar System for Remote Sensing","authors":"M. Hallikainen, J. Hyyppa, M. Toikka, T. Tares, J. Haapanen, P. Ahola, J. Pulliainen, K. Leppanen","doi":"10.1109/EUMA.1988.333890","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333890","url":null,"abstract":"A helicopter-borne dual-frequency FM-CW scatterometer for remote sensing is described. The scatterometer can measure the radar backscatter from a target with a range resolution of one meter. This is accomplished by preforming the Fast Fourier Transform to the received time-domain signal. The measurement is made simultaneously at eight channels (VV, HH, HV, and VH modes of polarization at 5.4 GHz and 9.8 GHz).","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"13 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":"117043122","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}
引用次数: 1
Two-Dimensional Analysis of Slow-Wave Propagation in Submicronic MESFET 亚微米MESFET中慢波传播的二维分析
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333966
A. Benghalia, D. Bajon, H. Baudrand
{"title":"Two-Dimensional Analysis of Slow-Wave Propagation in Submicronic MESFET","authors":"A. Benghalia, D. Bajon, H. Baudrand","doi":"10.1109/EUMA.1988.333966","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333966","url":null,"abstract":"An accurate two-dimensional analysis for the determination of depletion layer profile using Green's functions in MESFET has been done. Then a small-signal approach to obtain the inter-electrode impedance is presented which permits the study of the slow-wave propagation in the structure. The results are compared with those of quasi-static approach. The Green's function used in this work involves the boundary conditions on drain and source electrodes and is obtained by a conformal mapping. Thus the computation time is considerably reduced.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"38 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":"117282558","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}
引用次数: 2
Modeling the Gate Capacitance Nonlinearity in GaAs MESFET's GaAs MESFET栅极电容非线性建模
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333822
T. Brazil, P. O'Connell, N. O'Flaherty
{"title":"Modeling the Gate Capacitance Nonlinearity in GaAs MESFET's","authors":"T. Brazil, P. O'Connell, N. O'Flaherty","doi":"10.1109/EUMA.1988.333822","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333822","url":null,"abstract":"Accurate large-signal circuit models for GaAs MESFET's require a correct description of the nonlinear voltage dependence of the gate Schottky capacitance. This work describes an investigation of the physical basis of measured capacitance-voltage data using a l-dimensional model, and simple curve-fitting formulas are presented which enable close fitting of experimental results from several devices. A description of the incorporation of one such model in the SPICE time-domain simulator is provided.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"11 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":"121901261","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}
引用次数: 2
A Coplanar Waveguide Antenna for MMICs 用于mmic的共面波导天线
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333834
D. Evans, P. J. Gibson
{"title":"A Coplanar Waveguide Antenna for MMICs","authors":"D. Evans, P. J. Gibson","doi":"10.1109/EUMA.1988.333834","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333834","url":null,"abstract":"The coplanar patch antenna is a recent addition to the range of planar radiators. This paper presents some results for this type of antenna. It has good front to back ratio (15 dB) and low cross polarisation (-20 dB) performances and these have been achieved by exploiting the lens like effects of the high dielectric constant substrate.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"59 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":"126188522","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}
引用次数: 5
A Time-Domain Large-Signal Analysis of GaAs MESFET Devices Incorporating Frequency-Domain Expression for Termination Voltages (Voltage Substitution Method) 基于端接电压频域表达式的GaAs MESFET器件时域大信号分析(电压替换法)
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333968
M. Akaike
{"title":"A Time-Domain Large-Signal Analysis of GaAs MESFET Devices Incorporating Frequency-Domain Expression for Termination Voltages (Voltage Substitution Method)","authors":"M. Akaike","doi":"10.1109/EUMA.1988.333968","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333968","url":null,"abstract":"A nonlinear large-signal analysis is proposed, in which different impedances are connected to the external circuits for different frequencies. Analysis of the performance characteristics of frequency doublers, high-efficiency amplifiers, and degenerate amplifiers using GaAs MESFET's is shown.","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":"129133938","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}
引用次数: 3
Analysis and Design of 130-250 GHz Frequency Multipliers 130-250 GHz倍频器的分析与设计
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333843
T. Tolmunen, A. Raisanen
{"title":"Analysis and Design of 130-250 GHz Frequency Multipliers","authors":"T. Tolmunen, A. Raisanen","doi":"10.1109/EUMA.1988.333843","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333843","url":null,"abstract":"In this research the feasibility of developing high efficiency mm-wave multipliers in the frequency range of 130-250 GBz has been studied. A frequency quadrupler for 140 GBz and frequency doublers for 183 GBz and 230 GBz have been analyzed and optimized. The development of high efficiency frequency multipliers is especially important for the spaceborne mm-wave and submm-wave heterodyne receivers used for radio astronomy and remote sensing of the atmosphere.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"2 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":"130670007","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}
引用次数: 0
The Antenna System for the TELE-X Nordic Communication Satellite TELE-X北欧通信卫星的天线系统
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333804
M. Bonnedal, P. Ingvarson
{"title":"The Antenna System for the TELE-X Nordic Communication Satellite","authors":"M. Bonnedal, P. Ingvarson","doi":"10.1109/EUMA.1988.333804","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333804","url":null,"abstract":"The paper describes the design and the measured performance of the antenna system for the TELE-X satellite, the Scandinavian direct broadcast and communication satellite. The two antennas are shaped, astigmatic double reflector systems. Good aperture efficiencies combined with low sidelobe and crosspolarization levels are demonstrated.","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":"126753590","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}
引用次数: 1
Investigations of the Temperature Sensitivity of Dual-Band Dual-Mode Inwate Filters for Satellite Converters 卫星变换器双频双模内滤波器温度敏感性研究
1988 18th European Microwave Conference Pub Date : 1988-10-01 DOI: 10.1109/EUMA.1988.333932
F. Henze, J. Modelski, J. Hinken
{"title":"Investigations of the Temperature Sensitivity of Dual-Band Dual-Mode Inwate Filters for Satellite Converters","authors":"F. Henze, J. Modelski, J. Hinken","doi":"10.1109/EUMA.1988.333932","DOIUrl":"https://doi.org/10.1109/EUMA.1988.333932","url":null,"abstract":"Investigations of temperature sensitivity of INWATE-circuits are presented. INWATE-circuits are in principle dielectric filled waveguides and adhesion problems may occur due to the different thermal expansion coefficients of the dielectric material and the metal wall layer. It has been shown that thermal cycling from -35 °C to + 70 °C has no influence on transmission properties of Ka-band-resonators. Due to the negative temperature coefficient of polystyrene dielectric filling, the temperature coefficient of resonant frequency is nearly compensated. Furthermore a polarization independent dual-band dual-mode INWATE-filter for satellite converters has been investigated in a temperature range of -35 °C to 70 °C and there is no significant change in filter characteristic.","PeriodicalId":161582,"journal":{"name":"1988 18th European Microwave Conference","volume":"40 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":"123365399","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}
引用次数: 3
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