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1983 Eighth International Conference on Infrared and Millimeter Waves最新文献

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SIS mixer in 3-port approximation from an experimental I-V curve 基于实验I-V曲线的3端口近似SIS混频器
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126435
H. Hartfuss, M. Tutter
{"title":"SIS mixer in 3-port approximation from an experimental I-V curve","authors":"H. Hartfuss, M. Tutter","doi":"10.1109/irmm.1983.9126435","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126435","url":null,"abstract":"Conversion efficiency and output conductance are calculated on the basis of an experimental I-V characteristic of a lead alloy tunnel junction in the 3-port approximation considering both the junction capacitance and the quantum reactance. Gain is found only when the reactances are nearly completely tuned out, otherwise loss of at least 7 dB is expected under usual practical conditions. The calculations have been carried out for local oscillator frequency of 88 GHz in the limit of low intermediate frequency.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131566090","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
Detection at 100–300 μm with Hg1-xCdxTe in a magnetic field 用Hg1-xCdxTe在磁场中检测100-300 μm
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126406
M. Kimmitt, M. Takai
{"title":"Detection at 100–300 μm with Hg1-xCdxTe in a magnetic field","authors":"M. Kimmitt, M. Takai","doi":"10.1109/irmm.1983.9126406","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126406","url":null,"abstract":"At the 7th International Conference on Infrared and Millimeter Waves, Weber and Kulpa (in a distributed paper) reported enhanced response of a HgCdTe detector when operated in magnetic fields up to 30 kilogauss. However, unlike in n-InSb [1] hot electron bolometers there was no marked increase in responsivity at shorter far infrared wavelengths (compared with longer wave inhancement) with increasing field and no tunable response.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133244950","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
Convective cell formation in a gyro-traveling wave tube 陀螺行波管中对流胞体的形成
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126464
G. Thomas
{"title":"Convective cell formation in a gyro-traveling wave tube","authors":"G. Thomas","doi":"10.1109/irmm.1983.9126464","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126464","url":null,"abstract":"Recent work utilizing the relationship between solitons and convective cells to analytically model the nonlinear interaction dynamics of a gyro-traveling wave tube are presented. Theoretical predictions agree qualitatively with computer simulations and experimental data.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134173476","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
Isotropic conversion loss as a measure of quasi-optical mixer efficiency 测量准光混频器效率的各向同性转换损耗
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126497
K. Stephan, T. Iton
{"title":"Isotropic conversion loss as a measure of quasi-optical mixer efficiency","authors":"K. Stephan, T. Iton","doi":"10.1109/irmm.1983.9126497","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126497","url":null,"abstract":"Conversion loss is an important practical measure of conventional mixer performance, but the usual definition of conversion loss is often inconvenient and inadequate when applied to quasi-optical mixers with integrated antennas. We herein define a new quantity called isotropic conversion loss (Liso) which not only characterizes quasi-optical mixers with greater accuracy, but is also easier to measure in the laboratory. Experimental results from tests of two different mixers demonstrate the utility of the new measure Liso.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134579892","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
Accurate closed-form solutions for fin-lines 精确的鱼鳍线闭合解
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126456
P. Pramanick, P. Bhartia
{"title":"Accurate closed-form solutions for fin-lines","authors":"P. Pramanick, P. Bhartia","doi":"10.1109/irmm.1983.9126456","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126456","url":null,"abstract":"Accurate closed-form expressions are derived for the theoretical prediction of equivalent dielectric constant, cutoff wavelength, and characteristic impedance of unilateral, bilateral and insulated fin-lines. The expressions developed on a physical basis are accurate to within ±0.6% and valid over the range of structural parameters 0 ≤ b/a ≤ 1, 1/32 ≤ d/b ≤ 1, and 1/32 ≤ s/a ≤ 1/4 (see Fig. 1).","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130373311","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
Millimeter wave measurements of the TFTR line integrated density & electron temperature profile 毫米波测量的TFTR线集成密度和电子温度分布
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126395
P. Efthimion
{"title":"Millimeter wave measurements of the TFTR line integrated density & electron temperature profile","authors":"P. Efthimion","doi":"10.1109/irmm.1983.9126395","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126395","url":null,"abstract":"Millimeter — submillimeter wave diagnostics are expected to contribute to the characterization of the Tokamak Fusion Test Reactor (TFTR) plasma. The goal of TFTR is to demonstrate energy breakeven by generating fusion neutron power equal to the input power to the plasma. Plasma breakeven conditions includeg electron and ion temperatures on the order of 108 °K and plasma densities of n ∼ 1014 particles/cm3. Four millimeter-submillimeter instruments will diagnose the TFTR plasma: (1) 1mm wave density interferometer, (2) Fast Scanning heterodyne radiometer, (3) Fourier Transform Spectrometer, and (4) 1mm wave density scattering. With the exception of the scattering system, the design of these diagnostics were presented at the Sixth International Conference on Infrared and Millimeter Waves.1 This past year the 1mm interferometer and the fast scanning heterodyne receiver have measured the line average density and the time evolution of the electron temperature profile of the TFTR plasma during its initial operation. The performance of these diagnostics will be presented including examples of plasma density and temperature measurements.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114503936","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
CH3OH laser line assignments revisited CH3OH激光线的重新分配
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126488
G. Moruzzi, F. Strumia
{"title":"CH3OH laser line assignments revisited","authors":"G. Moruzzi, F. Strumia","doi":"10.1109/irmm.1983.9126488","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126488","url":null,"abstract":"The CH3OH line frequencies calculated by diagonalizing the molecular Hamiltonian are affected by inaccuracies of the order of 10−3 ∼ 10−2 cm−1 or higher, the inaccuracy increasing with the values of the quantum numbers involved in the line. The main sources of inaccuracy are the computational approximations and the fact that the best available molecular constants have beer evaluated from best fits of microwave data, which usually involve low quantum numbers only. These inaccuracies and the richness of the methanol spectrum generate several ambiguities in the line assignments, in particular in the assignment of the far infrared (FIR) lines of the CH3OH laser. In order to overcome these ambiguities we have started a systematic investigation of the Fourier absorption spectrum of methanol in the regions between 8 and 80 and between 950 and 1100 cm−1. The peak precisions of our Fourier spectra are 2×10−4 and 5×10−4 cm−1 respectively for the two spectral regions (1). With such precisions and with definite assignments for the absorption lines it is possible to form loops of lines containing at least three absorption lines and closed by an investigated laser line. The balance of the frequencies involved in the loop must give zero within the experimental errors, this leading practically always to a unique choice for the assignment of the laser line. We have thus been able to prove or disprove several previous assignments, to make new assignments and to predict the frequencies of some possible FIR laser lines not yet observed.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116751335","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
Analysis of the output mode from 60 GHz, 200 kW pulsed and CW gyrotrons 60 GHz、200 kW脉冲和连续波回旋管输出模式分析
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/IRMM.1983.9126416
K. Feloh, R. Bier, L. Fox, H. Huey, H. Jory, J. Manca, J. Shively, S. Spang, C. Moeller
{"title":"Analysis of the output mode from 60 GHz, 200 kW pulsed and CW gyrotrons","authors":"K. Feloh, R. Bier, L. Fox, H. Huey, H. Jory, J. Manca, J. Shively, S. Spang, C. Moeller","doi":"10.1109/IRMM.1983.9126416","DOIUrl":"https://doi.org/10.1109/IRMM.1983.9126416","url":null,"abstract":"A Varian 60 GHz, CW gyrotron has recently been operated at power levels up to 200 kW CW. The tube employs a TE011/TE021 complex interaction cavity which inhibits mode competition by the TE221 mode with the desired TE021 mode. The output mode of the cavity is nominally in the TE02 circular waveguide mode in overmoded waveguide. Since the output waveguide also serves as the gyrotron collector, mode conversion occurs in the taper sections and gaps incorporated into the collector. Measurements of the mode conversion on a 60 GHz, 200 kw, 100 ms pulse tube, have been made and compared with similar measurements on the 60 GHz, 200 kW, CW gyrotron. These measurements indicated that the CW tube had significantly more conversion of the TE02 mode into other TEon modes than did the pulse tube. Current design work is aimed at reducing the mode conversion of the CW design to the same levels as the pulse design (≲10% mode conversion).","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129409215","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 millimeter wave radio frequency system for atmospheric turbulence measurements 一种用于大气湍流测量的毫米波射频系统
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126480
R. McMillan, V. Brady, G. W. Rosenberg, G. Kirkman
{"title":"A millimeter wave radio frequency system for atmospheric turbulence measurements","authors":"R. McMillan, V. Brady, G. W. Rosenberg, G. Kirkman","doi":"10.1109/irmm.1983.9126480","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126480","url":null,"abstract":"This paper describes a millimeter wave atmospheric transmission link operating at 116, 140 and 173 GHz designed to measure the mutual coherence function (MCF) for transmission through atmospheric turbulence. The transmitter and receiver local oscillator are phase-locked, and the receiver mixers are second harmonic types in the cross-guide configuration. The receiver uses double conversion, with intermediate frequencies of 930 and 30 MHz. A 30 MHz signal combining network uses phase shifters and video detectors to determine voltages proportional to the parameters required for determination of the MCF.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129526717","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
Dielectric properties of beryllia in the near-millimeter wavelength range 铍在近毫米波长范围内的介电特性
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126385
J. Sattler, G. Simonis
{"title":"Dielectric properties of beryllia in the near-millimeter wavelength range","authors":"J. Sattler, G. Simonis","doi":"10.1109/irmm.1983.9126385","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126385","url":null,"abstract":"The refractive indices and absorption coefficients of four beryllia (BeO) ceramic samples have been measured between 4 and 18 cm−1 with a Michelson interferometer. The index, n, follows a linear relationship with density, p, over the range 2.8 < p < 3.0 g/cc, and thus exhibits a density-dependent index variation of about 3 percent.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126903696","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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