Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129955
B. Clifton, G. D. Alley, R. A. Murphy, W. J. Piacentini, I.H. Mroczkowski, W. Macropoulos
We describe the fabrication and testing of GaAs monolithic integrated circuit mixers which have liquid nitrogen double sideband (DSB) mixer noise temperatures in the range 50-200 K and conversion losses of 4.0-5.0 dB.
{"title":"Cooled Low Noise GaAs Monolithic Mixers at 110 GHz","authors":"B. Clifton, G. D. Alley, R. A. Murphy, W. J. Piacentini, I.H. Mroczkowski, W. Macropoulos","doi":"10.1109/MWSYM.1981.1129955","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129955","url":null,"abstract":"We describe the fabrication and testing of GaAs monolithic integrated circuit mixers which have liquid nitrogen double sideband (DSB) mixer noise temperatures in the range 50-200 K and conversion losses of 4.0-5.0 dB.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121063503","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129893
H. Dropkin, R. Leavitt, D. Wortman
Results are given that describe our experimental observations of orotron oscillation and the physical principles which govern the design of this device, a Smith-Purcell free-electron laser for the millimeter and submillimeter wavelength regions.
{"title":"Design and Operation of an Orotron-A Tunable Source of Coherent Millimeter Wave Radiation","authors":"H. Dropkin, R. Leavitt, D. Wortman","doi":"10.1109/MWSYM.1981.1129893","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129893","url":null,"abstract":"Results are given that describe our experimental observations of orotron oscillation and the physical principles which govern the design of this device, a Smith-Purcell free-electron laser for the millimeter and submillimeter wavelength regions.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130660178","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129849
R. Stancliff
A new technique for broadband microwave power generation is presented: The balanced dual gate MESFET frequency doubler. Design and results for 18-26.5 GHz and 4-23 GHz doublers are presented.
{"title":"Balanced Dual Gate GaAs FET Frequency Doublers","authors":"R. Stancliff","doi":"10.1109/MWSYM.1981.1129849","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129849","url":null,"abstract":"A new technique for broadband microwave power generation is presented: The balanced dual gate MESFET frequency doubler. Design and results for 18-26.5 GHz and 4-23 GHz doublers are presented.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132816447","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129958
J. Schroth
Single ended mixers at 94 GHz and 140 GHz with whisker-contacted honeycomb diodes have been realized. Environmental tests showed that the split block mixermount construction withstands shocks up to 1000 g/2 ms. Commercially available Mott-diodes have been used to obtain noise temperatures of 600/spl deg/K (SSB) at 94 GHz and 250 uW L.O. drive.
{"title":"Highly Reliable Low-Noise MM-Wave Mixers with Whisker-Contacted Honeycomb Diodes","authors":"J. Schroth","doi":"10.1109/MWSYM.1981.1129958","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129958","url":null,"abstract":"Single ended mixers at 94 GHz and 140 GHz with whisker-contacted honeycomb diodes have been realized. Environmental tests showed that the split block mixermount construction withstands shocks up to 1000 g/2 ms. Commercially available Mott-diodes have been used to obtain noise temperatures of 600/spl deg/K (SSB) at 94 GHz and 250 uW L.O. drive.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130295615","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129981
T. Ranganath, T. Joseph, J.Y. Lee
This paper reports on the performance of the first fully Integrated Optical Spectrum Analyzer consisting of a GaAlAs semiconductor laser, a LiNb0/sub 3/ integrated optic chip, and a Si detector/CCD linear array,
{"title":"The Integrated Optic Spectrum Analyzer -- a First Demonstration","authors":"T. Ranganath, T. Joseph, J.Y. Lee","doi":"10.1109/MWSYM.1981.1129981","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129981","url":null,"abstract":"This paper reports on the performance of the first fully Integrated Optical Spectrum Analyzer consisting of a GaAlAs semiconductor laser, a LiNb0/sub 3/ integrated optic chip, and a Si detector/CCD linear array,","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133862889","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129948
A.R. Skatvold
A technique which reduces the requirement for constructing high accuracy phase shifters for steering the main beam in a small (less than 20 elements) linear antenna array is described. The key hardware components are the phase detectors which monitor the phase difference between adjacent radiating elements and a microcomputer to read the phase differences and adjust phase shifters to obtain the desired antenna performance. This closed loop technique will also provide a means for future investigations to verify theoretical versus experimental phase distributions and other element effects in small antenna arrays.
{"title":"Beam Steering Antenna Control Technique","authors":"A.R. Skatvold","doi":"10.1109/MWSYM.1981.1129948","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129948","url":null,"abstract":"A technique which reduces the requirement for constructing high accuracy phase shifters for steering the main beam in a small (less than 20 elements) linear antenna array is described. The key hardware components are the phase detectors which monitor the phase difference between adjacent radiating elements and a microcomputer to read the phase differences and adjust phase shifters to obtain the desired antenna performance. This closed loop technique will also provide a means for future investigations to verify theoretical versus experimental phase distributions and other element effects in small antenna arrays.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123036203","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129808
C. Huang, A. Herbig, R. Anderson
Sub-half -micron gate GaAs FETs fabricated on high quality VPE buffer material have achieved state-of-the-art low noise perforances. Best noise figures of 0.58 dB at 4 GHz and 1.29 dB at 12 GHz have been observed. Power added efficiency of 35% at Ku band is also reported.
{"title":"Sub-Half-Micron GaAs FETS for Applications Through K Band","authors":"C. Huang, A. Herbig, R. Anderson","doi":"10.1109/MWSYM.1981.1129808","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129808","url":null,"abstract":"Sub-half -micron gate GaAs FETs fabricated on high quality VPE buffer material have achieved state-of-the-art low noise perforances. Best noise figures of 0.58 dB at 4 GHz and 1.29 dB at 12 GHz have been observed. Power added efficiency of 35% at Ku band is also reported.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128773903","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129898
I. Awai, T. Itoh
A coupled dielectric-ferrite waveguide is analyzed by a coupled-mode theory, and numerical studies are performed for designing new distributed nonreciprocal devices for millimeter-waves. A number of practical considerations are included.
{"title":"Coupled-Mode Theory Analysis of Distributed Nonreciprocal Devices","authors":"I. Awai, T. Itoh","doi":"10.1109/MWSYM.1981.1129898","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129898","url":null,"abstract":"A coupled dielectric-ferrite waveguide is analyzed by a coupled-mode theory, and numerical studies are performed for designing new distributed nonreciprocal devices for millimeter-waves. A number of practical considerations are included.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"28 Sup9a 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115264125","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129828
A. D’assunção, D. Rogers
The characteristic impedances and the normalized phase velocities of single and parallel-coupled striplines using anisotropic substrates were obtained by means of an integral-equation approach and a mapping method. A quasi-TEM approximation based on Laplace's equation was used. Calculated values for sapphire and pyrolytic boron nitride are given.
{"title":"Analysis of Single and Coupled Striplines with Anisotropic Substrates","authors":"A. D’assunção, D. Rogers","doi":"10.1109/MWSYM.1981.1129828","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129828","url":null,"abstract":"The characteristic impedances and the normalized phase velocities of single and parallel-coupled striplines using anisotropic substrates were obtained by means of an integral-equation approach and a mapping method. A quasi-TEM approximation based on Laplace's equation was used. Calculated values for sapphire and pyrolytic boron nitride are given.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114553046","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}
Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129870
S. A. Mohammed
The transfer function of a lowpass non-minimum-phase network with characteristics approximating a constant passband amplitude and any prescribed phase can be expressed in a closed form. This procedure can be used to approximate pre-distorted lowpass characteristics such that application of non-linear frequency transformation produces the desired bandpass ones. Network synthesis leads to a lowpass cross-coupled structure with diagonal cross-couplings. The method is used to design a six-cavity waveguide filter with linear phase characteristic.
{"title":"Design of Filters with Ideal Amplitude and Any Prescribed Phase","authors":"S. A. Mohammed","doi":"10.1109/MWSYM.1981.1129870","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129870","url":null,"abstract":"The transfer function of a lowpass non-minimum-phase network with characteristics approximating a constant passband amplitude and any prescribed phase can be expressed in a closed form. This procedure can be used to approximate pre-distorted lowpass characteristics such that application of non-linear frequency transformation produces the desired bandpass ones. Network synthesis leads to a lowpass cross-coupled structure with diagonal cross-couplings. The method is used to design a six-cavity waveguide filter with linear phase characteristic.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115338659","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}
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