{"title":"Water Vapor: Its Structure and Electromagnetic Absorption","authors":"H. R. Carlon","doi":"10.1109/ICSWA.1981.9335141","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335141","url":null,"abstract":"Research into the structure of water vapor is reviewed briefly. A physical description is given of the populations and size distributions of neutral molecular clusters in water vapor and moist air that interact with electromagnetic radiation, Some infrared data are given.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"10 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":"116717115","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":"Antiferromagnetic Resonances of (CH3NH3)2MnCl4 in a Magnetic Field at Arbitrary Angle to the Easy Axis","authors":"W. Reusch, K. Strobel, R. Geick","doi":"10.1109/ICSWA.1981.9335117","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335117","url":null,"abstract":"We have studied the magnetic excitations of (CH3NH3)2MnCl4 by means of millimeter wave resonance techniques for magnetic fields at various angles to the easy axis. Our results are compared with standard spin wave calculations for the antiferromagnetic resonance and the resonance in the spin flop regime. Surprisingly, we observe a splitting of the resonance lines which increases with increasing angle between the c-axis of the sample and the static magnetic field and which is not described by simple spin wave theory.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"21 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":"127174695","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}
H. Preiswerk, Z. Rozkwitalski, S. Gnepf, F. Kneubühl
{"title":"Optically Pumped Distributed Feedback (DFB) 496 μm CH3F Laser","authors":"H. Preiswerk, Z. Rozkwitalski, S. Gnepf, F. Kneubühl","doi":"10.1109/ICSWA.1981.9335214","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335214","url":null,"abstract":"Waveguide DFB Theory In previous papers |1| we have reported on the first operation of a DFB gas laser, an optically pumped 496 μm CH3F laser with periodic metal waveguide structure |2|. The period of the original waveguide structure was equal to half the laser free-space wavelength, i.e. 248 μm. However, first experiments on the DFB gas laser in operation indicated that the period should be adapted to the laser wavelength modified by the finite cross section of the guide.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"5 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":"125367694","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":"Materials Implications on Millimeter Wave Radome Performance","authors":"D. Kozakoff, J. Hensel","doi":"10.1109/ICSWA.1981.9335184","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335184","url":null,"abstract":"An evaluation of candidate millimeter wave (MMW) radome materials necessitated determination of measurement repeatability of the Fabry-Perot interferometer. Measurements took into account material orientation with respect to the applied field to study fiber orientation effects. Subsequently, theoretical calculations were performed to find the impact of these dielectric variations on missile radome performance.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"236 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":"115015467","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}
U. Steigenberger, M. Eremets, S. G. Lapin, M. Ortenberg, Yu. V. Kosichkin
{"title":"Anomalous Stress Shift of Impurity Lines in Te under High Pressure","authors":"U. Steigenberger, M. Eremets, S. G. Lapin, M. Ortenberg, Yu. V. Kosichkin","doi":"10.1109/ICSWA.1981.9335122","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335122","url":null,"abstract":"For the elementary semiconductor Tellurium the effects of hydrostatic and uniaxial stress are in many aspects complementary. Whereas for hydrostatic pressure the helical chains of the lattice cell are pressed together and slightly expanded along the symmetry axis, for uniaxial stress along this axis holds exactly the opposite. This behaviour is well reflected by the complementary distortion of the electronic energy band states and has been confirmed experimentally by cyclotron resonance experiments [1]. The present study investigates whether the same complementary situation holds also for the shallow impurity system and provides eventually a tool for the still remaining identification of the different impurity transitions.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"270 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":"121986625","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":"Correction of Phase Errors in far Infrared Fourier Spectroscopy","authors":"D. Tanner, C. D. Porter","doi":"10.1109/ICSWA.1981.9335188","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335188","url":null,"abstract":"Note that from equation (3) and the definition of y(x), the intensity at zero path difference (the white light fringe) is and the spectrum is recovered by multiplying this tranform by e-i¢(w): p(w) ~ e-i¢(w) Ll 5 iwxJ (5) In an ideal two-beam interferometer, the interferogram is the cosine Fourier transform of the frequency spectrum of the I ight detected by the detector. This interferogram is given by","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":"129530202","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 Method for Optimizing the RF Field Distribution in a Gyromonotron","authors":"H. Döring, Yu Wei","doi":"10.1109/ICSWA.1981.9335153","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335153","url":null,"abstract":"The maximum efficiency of a gyromonotron depends on the RF field and the static magnetic field distributions in the resonator. A method for optimizing the RF field distribution is presented. The possibility of realizing this optimized field distribution by employing a magnetic field step will be studied.","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":"128390513","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":"Launching Loss in the Reflection Wideband Gyrotron Travelling Wave Amplifier (Gyro — Twt)","authors":"Y. Lau, L. Barnett, V. Granatstein","doi":"10.1109/ICSWA.1981.9335150","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335150","url":null,"abstract":"Experiments(1) show that the usual 9 db launching loss is absent in the recently proposed wide-band gyro-twt(2). In the experiment, an input signal is injected from the downstream of the electron beam inside a mildly tapered waveguide. Upon reflection at cutoff, the signal co-propagates with the beam and is amplified. By analyzing the reflection process in detail, we found that the gentle taper of the waveguide produces minimal mode conversion and hence insignificant loss, in agreement with experiments(1). Beam prebunching is also found to be relatively unimportant.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"38 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":"127763049","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":"Harmonic Generation in the Near-Millimeter-Wave Range by Thin MOS-Structures","authors":"U. Lieneweg, J. Maserjian","doi":"10.1109/ICSWA.1981.9335219","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335219","url":null,"abstract":"Concepts for frequency multiplication into the range of 200 - 600 GHz are described. They are based on MOS-diodes with extremely thin oxide- and Si-epi-layers. While the goal is planar integrated arrays, the first experiments are done with individual whisker-coupled diodes.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"452 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":"125784951","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":"Electro-Optic Devices in Dielectric Waveguide","authors":"M. Klein","doi":"10.1109/ICSWA.1981.9335085","DOIUrl":"https://doi.org/10.1109/ICSWA.1981.9335085","url":null,"abstract":"In recent years, integrated circuit techniques have become increasingly important in implementing components and subsystems at millimeter wavelengths. One common waveguide structure in this spectral region is dielectric image line, formed by placing half-height rectangular dielectric waveguide on a metal ground plane. A number of passive and active devices have been demonstrated using image guide, including directional couplers, filters, phase shifters, scanning antennas, detectors and sources. In most cases, the active devices studied required careful mounting of a discrete electrical device in close proximity to the waveguide structure in a way which optimizes coupling to the waveguide. In this review we describe active devices in dielectric waveguide which can be realized by direct electrical control of the bulk dielectric properties of the transmission medium. These devices have intrinsic high speed, and are directly compatible with common waveguide structures.","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":"133879704","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}