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

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Imaging Antenna Arrays 成像天线阵列
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335190
D. Neikirk, D. Rutledge, M. Muha, Hyeon Park, Chang-Xuan Yu
{"title":"Imaging Antenna Arrays","authors":"D. Neikirk, D. Rutledge, M. Muha, Hyeon Park, Chang-Xuan Yu","doi":"10.1109/ICSWA.1981.9335190","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335190","url":null,"abstract":"A far-infrared imaging antenna array has been demonstrated for the first time. The array is a line of evaporated silver bow-tie antennas on a fused-quartz substrate with bismuth-micro-bolometer detectors. The measured optical transfer function shows that the system is diffraction-limited. This imaging array should find direct application in fusion plasma diagnostics. If the microbolometers can be replaced by more sensitive diode detectors, the array should also find application in radiometry and radar.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"9 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":"126885752","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: 281
A Cryogenic Receiver for 1 Mm Wavelength 1毫米波长低温接收器
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335161
N. Erickson
{"title":"A Cryogenic Receiver for 1 Mm Wavelength","authors":"N. Erickson","doi":"10.1109/ICSWA.1981.9335161","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335161","url":null,"abstract":"A cryogenic receiver covering the 200-350 GHz range is described. Two Schottkydiode mixers cover this range, with the mixers and FET IF amplifier cooled to 20 K. LO power is provided by a frequency doubler/tripler, with a Martin-Puplett interferometer used as the LO-signal diplexer. The best system temperature is 710 K SSB at 225 GHz, rising to 2000 K at 348 GHz.","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":"128081210","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
Computer Analysis of Rectangular Dielectric Waveguide for Millimeter Waves 毫米波矩形介质波导的计算机分析
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335167
E. Schweig, W. Bridges
{"title":"Computer Analysis of Rectangular Dielectric Waveguide for Millimeter Waves","authors":"E. Schweig, W. Bridges","doi":"10.1109/ICSWA.1981.9335167","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335167","url":null,"abstract":"High dielectric constant rectangular dielectric waveguides are suitable transmission media for millimeter waves. We have made a finite-difference method study of the electromagnetic modes of such guides and determined the limitations of the commonly-used approximate formulas of Marcatili.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"12 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":"131441443","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
TFTR Fast-Scanning Heterodyne Receiver TFTR快速扫描外差接收机
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335129
R. Bitzer, M. Goldman, M. McCarthy, V. Arunasalam, P. Efthimion
{"title":"TFTR Fast-Scanning Heterodyne Receiver","authors":"R. Bitzer, M. Goldman, M. McCarthy, V. Arunasalam, P. Efthimion","doi":"10.1109/ICSWA.1981.9335129","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335129","url":null,"abstract":"The TFTR fast-scanning heterodyne receiver is designed to sweep the frequency range 75-210 GHz in 3ms in order to measure the blackbody electron cyclotron emission in TFTR, and thus ascertain the time evolution of the electron temperature profile.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"529 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":"132382598","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
Some Recent Developments in CW Optically Pumped FIR Lasers 连续波光泵浦FIR激光器的最新进展
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335086
C. Pidgeon
{"title":"Some Recent Developments in CW Optically Pumped FIR Lasers","authors":"C. Pidgeon","doi":"10.1109/ICSWA.1981.9335086","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335086","url":null,"abstract":"As pointed out in 1978 by Hodges at the Third International Conference on Infrared and Millimeter Waves [1], a review of advances in optically pumped FIR lasers (OPFIRL's) since the pioneering work of Chang and Bridges[2] represents a formidable challenge; how much more so today when six full sessions were devoted to the subject at the Fifth International Conference in Wrzburg [3]. Since good review articles already exist [1,4,5,6], it is not the purpose of the present paper to be encyclopaedic, but rather to outline some developments in the last two years. Detailed references will be given in the text; a comprehensive source is in work already cited [3,6] or in the Journal of IR and Mm Waves [7]. Again for reasons of space, it is necessary to adhere strictly to advances in cw OPFIRL's.","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":"124226639","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
ECE-Measurements on ASDEX 在ASDEX上的ece测量
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335127
D. Campbell, A. Eberhagen
{"title":"ECE-Measurements on ASDEX","authors":"D. Campbell, A. Eberhagen","doi":"10.1109/ICSWA.1981.9335127","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335127","url":null,"abstract":"The electron cyclotron emission from the ASDEX tokamak has been measured with a novel four-channel polychromator and a conventional Michelson interferometer. A report will be given on the experimental results and the experience gained with these diagnostics.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"101 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":"124337257","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
Propagation of Visible and Infrared Radiation in Snow and Rain 可见和红外辐射在雪和雨中的传播
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335136
G. Gimmestad, L. W. Winchester, S. M. Lee
{"title":"Propagation of Visible and Infrared Radiation in Snow and Rain","authors":"G. Gimmestad, L. W. Winchester, S. M. Lee","doi":"10.1109/ICSWA.1981.9335136","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335136","url":null,"abstract":"As part of a program to develop improved models for infrared and visible extinction in adverse weather, a one-kilometer transmission range has been established near Houghton, Michigan, where annual rainfall is about twenty inches, fog is common, and annual snowfall often exceeds 200 inches. A Barnes Engineering Transmissometer is used to record transmission in the 3-5 and 8-14 micrometer bands, a Helium-Neon laser transmissometer is used to record transmission at 0.63 micrometers, and a Nd:YAG laser transmissometer is used to measure transmission at 1.06 micrometers. During Transmission measurements, an automated weather station periodically records standard weather parameters. Results are presented as plots of the logarithm of the infrared extinction coefficient versus the logarithm of the visible extinction coefficient (the GAP model format). Extinction coefficients for rain tend to lie along straight lines, in fairly good agreement with the GAP model, when the atmosphere contains rain drops but not suspended droplets. Measured extinction coefficients in snow tend to lie along straight lines on the log-log plots, with slight differences from one snow storm to another, which are attributed to differences in types of snow-flakes.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"39 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":"121286700","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
GaAs Abrupt Junction Mitatt and Tunnett
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335111
D. Pan, N. Lee
{"title":"GaAs Abrupt Junction Mitatt and Tunnett","authors":"D. Pan, N. Lee","doi":"10.1109/ICSWA.1981.9335111","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335111","url":null,"abstract":"We report a theoretical investigation on the GaAs abrupt pn junction diodes to be operated in the MITATT or TUNNETT mode from 100 GHz to 800 GHz. No maximum frequency limitation is found due to the effect of injection pulse width. The experimental results by Nishizawa et.al., are in agreement with the theory. Our results indicate that GaAs MITTATs or TUNNETTs can operate with significant efficiency, around 5%, at least up to 500 GHz.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"50 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":"121469919","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
Pump Saturation in Optically Pumped FIR Lasers and Nonlinear Hanle Effect 光泵浦FIR激光器的泵浦饱和与非线性汉勒效应
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335215
K. Ernst, M. Inguscio, A. Moretti, F. Strumia
{"title":"Pump Saturation in Optically Pumped FIR Lasers and Nonlinear Hanle Effect","authors":"K. Ernst, M. Inguscio, A. Moretti, F. Strumia","doi":"10.1109/ICSWA.1981.9335215","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335215","url":null,"abstract":"The infrared absorption increases in presence of static electric fields explains the enhancements observed in Satrk FIR molecular lasers. Measurements are performed for several transitions of FIR active molecules using a Stark optoacoustic technique. A simple theory is developed for the nonlinear Hanle effect which explains the experimental results.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"617 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":"116203004","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 Tapered Wall Gyrotron Traveling-Wave Amplifier 锥形壁回旋管行波放大器
1981 International Conference on Submillimeter Waves and Their Applications Pub Date : 1981-12-01 DOI: 10.1109/ICSWA.1981.9335083
L. Barnett, Y. Lau, K. Chu, V. Granatstein
{"title":"The Tapered Wall Gyrotron Traveling-Wave Amplifier","authors":"L. Barnett, Y. Lau, K. Chu, V. Granatstein","doi":"10.1109/ICSWA.1981.9335083","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335083","url":null,"abstract":"Gyrotron traveling-wave amplifiers using tapered waveguide circuits are being investigated as a method of obtaining very wide bandwidths at millimeter-wave frequencies. The axial magnetic field is profiled to maintain synchronism. A first experiment using a 70kV, 1 A annular electron beam operating in the TE01 circular-electric mode produced a 13% small signal bandwidth with 18 dB midband gain at 35GHz. A new experiment is being planned which will operated in the TE011 mode with a goal of achieving a two-to-three factor of bandwidth improvement over the first experiment.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"101 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":"122456456","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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