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1987 Twelth International Conference on Infrared and Millimeter Waves最新文献

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A nodular approach to beam waveguide — the optiguidetm system 波束波导的一种结核方法——光导系统
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/IRMM.1987.9126970
P. Goldsmith, E. L. Moore
{"title":"A nodular approach to beam waveguide — the optiguidetm system","authors":"P. Goldsmith, E. L. Moore","doi":"10.1109/IRMM.1987.9126970","DOIUrl":"https://doi.org/10.1109/IRMM.1987.9126970","url":null,"abstract":"We have developed a compact system of Gaussian beam waveguide using low loss lenses which is useful for test bench as well as subsystem applications. The frequency range from 75 GHz (4mm wavelength) to 300 GHz (1mm wavelength) is covered in octave bandwidths. OptiguideTM Gaussian beam waveguide can handle multiple polarizations, and can be adapted to handle multiple spatial modes as well. To date, we have developed 3- and 4-port directional couplers, attenuators, isolators, and circulators. Polarization processing components include grids which can act as polarization diplexers or analyzers, half-wave plates, and quarter-wave plates. The modular approach readily lends itself to configuring of systems to provide a wide range of functions. Some data on a 140–220 GHz (WR-5 waveguide band) system are presented,","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117253413","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
Selectable-finesse fabry-perot interferometer for the frequency measurements of millimeter and submillimeter waves 用于毫米波和亚毫米波频率测量的可选精细法布里-珀罗干涉仪
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/IRMM.1987.9127022
T. Hori, T. Matsui, K. Araki, H. Inomata
{"title":"Selectable-finesse fabry-perot interferometer for the frequency measurements of millimeter and submillimeter waves","authors":"T. Hori, T. Matsui, K. Araki, H. Inomata","doi":"10.1109/IRMM.1987.9127022","DOIUrl":"https://doi.org/10.1109/IRMM.1987.9127022","url":null,"abstract":"A scanning Fabry-Perot interferometer with selectable reflection-finesse is proposed for wide range operation over millimeter and submillimeter waves. The stripe directions of the two striped polarizing reflectors are made slightly different and the reflectance is varied according to the relative angle of two stripe directions. The optimization of reflection-finesse for frequency measurements is achieved by adjusting the relative angle. The experimental results show the possibility of selecting reflection-finesse over wide frequency range without exchanging reflectors.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117277972","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 lines assignments and frequency predictions by transition loops 跃迁环的Ch3oh激光谱线分配与频率预测
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/irmm.1987.9127043
P. Camesecchi, G. Moruzzi, F. Strumia, R. Lees
{"title":"Ch3oh laser lines assignments and frequency predictions by transition loops","authors":"P. Camesecchi, G. Moruzzi, F. Strumia, R. Lees","doi":"10.1109/irmm.1987.9127043","DOIUrl":"https://doi.org/10.1109/irmm.1987.9127043","url":null,"abstract":"The CH3OH line frequencies obtained from the diagonalization of a theoretical Hamiltonian are affected by inaccuracies of the order of 10−3 ∼ 10−1 cm−1 or higher, the inaccuracy increasing with the value of the quantum numbers involved in the transition. The inaccuracy on lines involving vibrationally excited levels, like, for instance, the lasing lines, is usually higher than the inaccuracy on the absorption lines within the vibrational ground state.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"5 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117338596","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
The third cyclotron harmonic gyromonotron with a ridged waveguide 第三种脊波导回旋加速器谐波回旋单管
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/irmm.1987.9126987
Gong Jianming, L. Shenggang
{"title":"The third cyclotron harmonic gyromonotron with a ridged waveguide","authors":"Gong Jianming, L. Shenggang","doi":"10.1109/irmm.1987.9126987","DOIUrl":"https://doi.org/10.1109/irmm.1987.9126987","url":null,"abstract":"Eigenvalues and fields of TE10 and TE30 modes in a ridged waveguide are derived in this paper. The field distribution of TE10 indicates the difficulty of peniotron's realization in the waveguide. After comparing the fields of TE10 and TE30 with that of TE10 and TE30 rectangular waveguide modes, nonlinear calculations have been carried out on models of large-orbit gyrotron oscillators with a ridged resonator or a rectangular one. It has been studied that the transverse fields affect the efficiency of the gyrotron at the fundamental or the third cyclotron harmonic. The computational results show the gyrotron oscillator at the third cyclotron harmonic and using TE301 in the ridged waveguide has 51% high efficiency.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116275870","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
High-temperature millimeter-wave dielectric measurements by free-space techniques 利用自由空间技术测量高温毫米波介质
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/irmm.1987.9126888
W. Ho
{"title":"High-temperature millimeter-wave dielectric measurements by free-space techniques","authors":"W. Ho","doi":"10.1109/irmm.1987.9126888","DOIUrl":"https://doi.org/10.1109/irmm.1987.9126888","url":null,"abstract":"Experimental measurement techniques have been developed for utilizing spot-focusing and collimating lens antennas to determine the millimeter-wave dielectric properties of planar samples over the frequency range 30–140 GHz at temperatures up to 1600°C. The method is suitable for studying the average bulk-sample dielectric properties as well as inhomogeneities on the dimensional scale of a wavelength. Other significant advantages of the method include: thermal isolation of the sample from the measurement apparatus, minimum sample preparation requirements, and convenience for screening a large number of samples in relatively short time periods. The measurement apparatus has been used to study a wide variety of materials, which has led to successful models for explaining the observed temperature dependence of the dielectric properties of polycrystalline ceramics.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114201162","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
Gyrotron thomson scattering diagnostics of ions in D-T burning tokamaks D-T燃烧托卡马克中离子的回旋加速器汤姆逊散射诊断
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/irmm.1987.9127072
P. Woskoboinikow, D. Cohn, J. Machuzak, R. Myer, D. Rhee
{"title":"Gyrotron thomson scattering diagnostics of ions in D-T burning tokamaks","authors":"P. Woskoboinikow, D. Cohn, J. Machuzak, R. Myer, D. Rhee","doi":"10.1109/irmm.1987.9127072","DOIUrl":"https://doi.org/10.1109/irmm.1987.9127072","url":null,"abstract":"Collective Thomson scattering can be used to diagnose localized ion temperature as well as alpha particle velocity distribution and density in a D-T burning tokamak. With one diagnostic beam a simultaneous, but independent, measure of the bulk ion temperature and alpha particle parameters can be made. Use of a long pulse, millimeter-wave gyrotron offers a significant margin in signal to noise ratio capability (√Δfτ > 1,000) not previously possible with lasers.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114689612","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 far infrared study of shallow acceptors in gaas/algaas quantum wells gaas/ alggaas量子阱中浅层受体的远红外研究
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/irmm.1987.9127016
A. A. Reeder, B. McCombe, F. Chambers, G. Devane
{"title":"A far infrared study of shallow acceptors in gaas/algaas quantum wells","authors":"A. A. Reeder, B. McCombe, F. Chambers, G. Devane","doi":"10.1109/irmm.1987.9127016","DOIUrl":"https://doi.org/10.1109/irmm.1987.9127016","url":null,"abstract":"Far infrared transmission has been used to study beryllium acceptors doped in the center of GaAs/AlGaAs quantum wells and bulk GaAs. From the infrared measurements a binding energy of 28.5meV was inferred, in agreement with photoluminescence measurements. The effects of confinement are evident in shifts to progressively higher frequencies of the dominant transitions as the well width is decreased from 200Å to 100Å. The magnetic field dependence of the observed transitions has been investigated between 0 and 9.0T at temperatures between 4.2 and 30K for the bulk sample and 200Å well width sample. The shifts of the transitions with magnetic field are much smaller than predicted by recent calculations for confined acceptors.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"10 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126036740","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
Analyses of picosecond pulse propagation along a coupled slotline on a lossy multilayer integrated circuit substrate 皮秒脉冲在有耗多层集成电路衬底上沿耦合槽线传输的分析
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/irmm.1987.9127033
C. Tzuang, J. Kuo, S. Kao, S. Su, K. Chang
{"title":"Analyses of picosecond pulse propagation along a coupled slotline on a lossy multilayer integrated circuit substrate","authors":"C. Tzuang, J. Kuo, S. Kao, S. Su, K. Chang","doi":"10.1109/irmm.1987.9127033","DOIUrl":"https://doi.org/10.1109/irmm.1987.9127033","url":null,"abstract":"Picosecond ultra high speed pulse propagation along a coupled slotline integrated on a lossy multilayer substrate is investigated by full wave spectral domain analysis with improved accuracy. The theoretical results based on both even and odd mode excitations of a coupled slotline are presented.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123531508","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
Far infrared detection without preamplifiers 无前置放大器的远红外探测
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/irmm.1987.9127003
A. Perera, D. Coon
{"title":"Far infrared detection without preamplifiers","authors":"A. Perera, D. Coon","doi":"10.1109/irmm.1987.9127003","DOIUrl":"https://doi.org/10.1109/irmm.1987.9127003","url":null,"abstract":"An injection pulse phenomenon1,2 which can be used to detect infrared (IR) radiation without the use of preamplifiers at 4.2K is described and analyzed.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131560932","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
Mode control in an overmoded gyrotron oscillator via priming 通过启动控制超模回旋管振荡器的模式
1987 Twelth International Conference on Infrared and Millimeter Waves Pub Date : 1987-12-01 DOI: 10.1109/irmm.1987.9126986
A. McCurdy, C. Armstrong
{"title":"Mode control in an overmoded gyrotron oscillator via priming","authors":"A. McCurdy, C. Armstrong","doi":"10.1109/irmm.1987.9126986","DOIUrl":"https://doi.org/10.1109/irmm.1987.9126986","url":null,"abstract":"Control of axial modes is accomplished in a gyrotron oscillator by injection of an external signal into the oscillator. It is found that the external signal need be present only during the initial stages of the pulsed oscillator buildup. It is also noted that the oscillation is not phase locked, due to the low input power level. From these two facts it is seen that priming is the mechanism responsible for the mode control effect. An analysis of the priming phenomenon is made using a quasi-linear theory (in the mode amplitudes) to understand the dependence of the degree of mode control on the external power level.","PeriodicalId":399243,"journal":{"name":"1987 Twelth International Conference on Infrared and Millimeter Waves","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126402454","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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