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1981 International Conference on Submillimeter Waves and Their Applications最新文献

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A Coherent 225 GHz Receiver 相干225 GHz接收机
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335163
R. E. Forsythe
{"title":"A Coherent 225 GHz Receiver","authors":"R. E. Forsythe","doi":"10.1109/ICSWA.1981.9335163","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335163","url":null,"abstract":"A receiver for use at 225 GHz has been designed and built. It uses a low noise, subharmonically pumped, balanced mixer that requires a local oscillator (LO) at only one fourth the signal frequency. The local oscillator is a commercially available 56 GHz phase locked Gunn oscillator with a 50 mW power output. Preliminary results indicate a 12 dB system noise figure (DSB).","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"552 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127670633","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
A Quasi-Optical Scanning Multiport (Quosm) Network Analyzer 准光扫描多端口网络分析仪
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335202
R. Bohlander, A. Mcsweeney, J. Newton, V. Brady, R. G. Shackelford
{"title":"A Quasi-Optical Scanning Multiport (Quosm) Network Analyzer","authors":"R. Bohlander, A. Mcsweeney, J. Newton, V. Brady, R. G. Shackelford","doi":"10.1109/ICSWA.1981.9335202","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335202","url":null,"abstract":"Heretofore, guided-wave six-port circuits have been used for network analysis at millimeter wavelengths. A development of an alternative quasi-optical circuit will be described which will provide greater facility at short millimeter to submillimeter wavelengths. It employs an analogue of a Michelon interferometer and near Gaussian-mode propagation.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121216044","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
Investigation of Narrow Band-Gap Semiconductors for Tunnetts 隧道用窄带隙半导体的研究
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335114
D. Pan, N. Lee
{"title":"Investigation of Narrow Band-Gap Semiconductors for Tunnetts","authors":"D. Pan, N. Lee","doi":"10.1109/ICSWA.1981.9335114","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335114","url":null,"abstract":"The potential of abrupt junction TUNNETT diodes made from narrow band gap semiconductor for millimeter wave frequency are explored theoretically. The alloy compound Hg1-xCdxTe which has a tunable band gap is chosen in this study. Neglecting impact ionization, an efficiency of 2.5% is obtained at 94 GHz in the simulation with a band-gap of 0.41 eV. We suggest that narrow band gap semiconductors have good potential for fabricating diodes operating in the TUNNETT or MITATT modes for millimeter wave applications.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116013544","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
Submillimeter Heterodyne Astronomy from Mauna Kea 莫纳克亚山的亚毫米外差天文学
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335079
D. Buhl, G. Chin, H. Fetterman, D. Peck, B. Clifton, P. Tannenwald, G. Koepf
{"title":"Submillimeter Heterodyne Astronomy from Mauna Kea","authors":"D. Buhl, G. Chin, H. Fetterman, D. Peck, B. Clifton, P. Tannenwald, G. Koepf","doi":"10.1109/ICSWA.1981.9335079","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335079","url":null,"abstract":"This paper reports on the results of a collaboration between NASA Goddard Space Flight Center and MIT Lincoln Laboratory in which a laser heterodyne receiver was developed and used at the NASA infrared telescope on Mauna Kea. The NASA IRTF is located on the island of Hawaii at an elevation of 14000 ft (4200 m). The atmosphere from the summit is just barely adequate for submm observations and only days with extremely low water vapor are usable (<1 precipitable mm H2O). This is due to very strong lines of water vapor in the band. Fig. 1 illustrates the atmospheric transmission spectrum at 0.5 mm of H2O. At our operating frequency of 691 GHz the atmospheric transmission is about 50%. Observations made during February 1981 showed an atmospheric transmission in this range on three out of the four days on the telescope. However, an earlier observing period in May 1980 produced measurable transmission on two days and the maximum transmission was 20%. The transmission spectrum shown here is an example of what can be expected on a very good day in winter from Mauna Kea.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116767651","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
Laboratory Studies of Water Vapor Absorption in Atmospheric EHF Windows 大气EHF窗口中水蒸气吸收的实验室研究
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335140
H. Liebe
{"title":"Laboratory Studies of Water Vapor Absorption in Atmospheric EHF Windows","authors":"H. Liebe","doi":"10.1109/ICSWA.1981.9335140","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335140","url":null,"abstract":"A measuring system, comprising a millimeter wave resonance spectrometer and a humidity simulator (RH = 0-101%), for determining absolute absorption by moist air in the 30 to 300 GHz range is described. Performance data and first results obtained at 138 GHz are discussed.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"484 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114122425","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
Velocity Overshoot in Silicon Inversion Layers by Broad Band Sub-Millimeter Wave Spectroscopy 宽带亚毫米波光谱在硅反转层中的速度超调
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335081
S. J. Allen, D. Tsui, F. Derosa, K. Thornber, B. A. Wilson
{"title":"Velocity Overshoot in Silicon Inversion Layers by Broad Band Sub-Millimeter Wave Spectroscopy","authors":"S. J. Allen, D. Tsui, F. Derosa, K. Thornber, B. A. Wilson","doi":"10.1109/ICSWA.1981.9335081","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335081","url":null,"abstract":"Small signal velocity overshoot is observed in a Si inversion layer by measuring the dynamical conductivity at d.c. and from 2.5 to 30 cm”1 (75-900 GHz) in the presence of a heating electric field. An overshoot of 30% is directly observed in the frequency domain. By Fourier transform the hot electron dynamics are displayed on a time scale from .5 to 6.5 psec.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126370666","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
Linear Theory of Gyromonotron 回旋单控管的线性理论
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335151
L. Shenggang
{"title":"Linear Theory of Gyromonotron","authors":"L. Shenggang","doi":"10.1109/ICSWA.1981.9335151","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335151","url":null,"abstract":"There have been a great number of papers concerning the linear theory of electron cyclotron resonance maser 1–6. The previous studies, however, have been limited or idealized in one respect or another. In this paper the general linear theory of gyromonotron is given with it's concrete application.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125243726","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: 4
A Segmented Aperture Approach to High Resolution NMMW Imaging 高分辨率毫米波成像的分割孔径方法
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335192
D. Schmieder, G. R. Loefer, M. Weathersby
{"title":"A Segmented Aperture Approach to High Resolution NMMW Imaging","authors":"D. Schmieder, G. R. Loefer, M. Weathersby","doi":"10.1109/ICSWA.1981.9335192","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335192","url":null,"abstract":"A design concept for a high resolution near millimeter wave imaging system is described. The design yields the required resolution for ground fire control applications with a series of small circular apertures which emulate a single large aperture. Design performance is analyzed and simulated imagery as shown.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122805255","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
Electromagnetic Study of the Grating-Enhanced Excitation of a Far Infrared Surface Wave 远红外表面波光栅增强激发的电磁研究
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335217
M. Nevière, R. Reinisch
{"title":"Electromagnetic Study of the Grating-Enhanced Excitation of a Far Infrared Surface Wave","authors":"M. Nevière, R. Reinisch","doi":"10.1109/ICSWA.1981.9335217","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335217","url":null,"abstract":"We report a rigorous electromagnetic study of the grating excitation of a far infrared electromagnetic surface wave. We get a surprising result: it exists an optimum groove depth for which the intensity of the surface wave is maximum. The dispersion curve and broadening of the resonance when the groove depth is increased are studied in detail.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131849276","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
Tokamak Temperature Measurement using Electron Cyclotron Emission at the Third Harmonic 利用三次谐波电子回旋辐射测量托卡马克温度
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335128
F. Blau
{"title":"Tokamak Temperature Measurement using Electron Cyclotron Emission at the Third Harmonic","authors":"F. Blau","doi":"10.1109/ICSWA.1981.9335128","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335128","url":null,"abstract":"The use of electron cyclotron emission from a tokamak plasma as a means for measuring the electron temperature spatial profile has become popular since the possibility was pointed out by Engelmann and Curatolo [1] in 1973. Generally one uses the fundamental or the second harmonic because the emission from a thermal plasma at these frequencies is very nearly at the black-body level, so that the intensity is directly proportional to the electron temperature and conveniently independent of the electron density. Use of the third harmonic has not been considered attractive because the plasma is optically thin at this frequency so the emission is dependent on the density [2] as well as the wall reflectivity. Unfortunately, as tokamak researchers succeed in creating plasmas of higher densities, the lower harmonic emission can be cut off, so that it does not propagate to the receiving antenna. Under such conditions, the third harmonic becomes more interesting.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"14 38","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120861834","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
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