Pub Date : 1977-06-21DOI: 10.1109/MWSYM.1977.1124447
M. Jack, P. Grant, J. Collins
Cepstrum analysis usinq Surface Acoustic Wave Fourier (Chirp) Transform processors has application in waveform detection and classification. Analyser capabilities are demonstrated theoretically and practically measuring the pulse width, duration, period and frequency of unknown input waveforms.
{"title":"Real Time Wideband Cepstrum Analysis Based on SAW Devices","authors":"M. Jack, P. Grant, J. Collins","doi":"10.1109/MWSYM.1977.1124447","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124447","url":null,"abstract":"Cepstrum analysis usinq Surface Acoustic Wave Fourier (Chirp) Transform processors has application in waveform detection and classification. Analyser capabilities are demonstrated theoretically and practically measuring the pulse width, duration, period and frequency of unknown input waveforms.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124399496","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124402
M. Gawronski, H. Goldie
A passive MIC receiver protector using graded diode basewidths has been developed that handles 200 watt RF pulses at 10 percent duty rates on a 1.5 x 1.75 x 0.025 inch alumina substrate. Leakage power and recovery period are under 20 mW peak spike, 10 mW peak flat, and 0.8 mu s. Data on harmonic generation is included. Integral STC during the receive period is included with the associated MIC digital driver.
一种使用渐变二极管基宽的无源MIC接收器保护器已经开发出来，在1.5 x 1.75 x 0.025英寸氧化铝基板上以10%的占空率处理200瓦射频脉冲。漏电功率和恢复期峰值在20mw，峰值在10mw，峰值在0.8亩s以下。接收期间的积分STC包含在相关的MIC数字驱动程序中。
{"title":"A High Power MIC Passive Diode Receiver Protector with Integral STC Using Variable Basewidth Techniques","authors":"M. Gawronski, H. Goldie","doi":"10.1109/MWSYM.1977.1124402","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124402","url":null,"abstract":"A passive MIC receiver protector using graded diode basewidths has been developed that handles 200 watt RF pulses at 10 percent duty rates on a 1.5 x 1.75 x 0.025 inch alumina substrate. Leakage power and recovery period are under 20 mW peak spike, 10 mW peak flat, and 0.8 mu s. Data on harmonic generation is included. Integral STC during the receive period is included with the associated MIC digital driver.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125955641","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124466
T. F. McMaster, E. Carlson, M.V. Schneider
Low noise and wide tunable bandwidth have been achieved in two-diode subharmonically-pumped hybrid integrated downconverters. A single-sideband mixer noise figure of 5 dB was measured at 98 GHz with Schottky-barrier diodes of a unique chip design, "notch-front diodes", mounted in a two-diode downconverter. A second circuit has been developed with a tunable bandwidth of 66-110 GHz. Over this frequency range, conversion loss of 5-9 dB and receiver noise figure of 10-14 dB, including an IF noise figure of 4 dB, was measured in a circuit using commercial beam-lead diodes.
{"title":"Subharmonically Pumped Millimeter-Wave Mixers Built with Notch-Front and Beam-Lead Diodes","authors":"T. F. McMaster, E. Carlson, M.V. Schneider","doi":"10.1109/MWSYM.1977.1124466","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124466","url":null,"abstract":"Low noise and wide tunable bandwidth have been achieved in two-diode subharmonically-pumped hybrid integrated downconverters. A single-sideband mixer noise figure of 5 dB was measured at 98 GHz with Schottky-barrier diodes of a unique chip design, \"notch-front diodes\", mounted in a two-diode downconverter. A second circuit has been developed with a tunable bandwidth of 66-110 GHz. Over this frequency range, conversion loss of 5-9 dB and receiver noise figure of 10-14 dB, including an IF noise figure of 4 dB, was measured in a circuit using commercial beam-lead diodes.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130717699","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124441
M. Sobhy, M. Safi
A design procedure has been developed to design lumped/distributed ladder networks. The necessary and sufficient conditions on the coefficients of the characteristic polynomial have been obtained and a suitable low-pass to band-pass frequency transformation has been developed. The procedure was then applied to design a microwave filter and the results show good agreement with the theoretical predictions.
{"title":"The Design of Ladder Networks Containing Lumped and Distributed Elements","authors":"M. Sobhy, M. Safi","doi":"10.1109/MWSYM.1977.1124441","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124441","url":null,"abstract":"A design procedure has been developed to design lumped/distributed ladder networks. The necessary and sufficient conditions on the coefficients of the characteristic polynomial have been obtained and a suitable low-pass to band-pass frequency transformation has been developed. The procedure was then applied to design a microwave filter and the results show good agreement with the theoretical predictions.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128029915","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124424
P. Antich, N. Tokita, J.H. Kim, E. W. Hahn
Patients with multiple malignant cutaneous tumors were locally heated with equipment making use of inductive radio frequency heating at 27.12 MHz. In vivo thermometry of tumor and normal adjacent tissue has consistently shown the presence of favorable thermal phenonena.
{"title":"Selective Heating of Cutaneous Human Tumors at 27.12 MHz (Abstract)","authors":"P. Antich, N. Tokita, J.H. Kim, E. W. Hahn","doi":"10.1109/MWSYM.1977.1124424","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124424","url":null,"abstract":"Patients with multiple malignant cutaneous tumors were locally heated with equipment making use of inductive radio frequency heating at 27.12 MHz. In vivo thermometry of tumor and normal adjacent tissue has consistently shown the presence of favorable thermal phenonena.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131941093","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124459
G. Kantor, D. Witters, J. Greiser
A direct contact applicator, specifically designed for microwave diathermy, is described. Its performance characteristics are a circularly polarized field pattern, a relatively uniform heating pattern and low leakage radiation.
{"title":"The Design and Performance of a Circularly Polarized Direct Contact Applicator for Microwave Diathermy","authors":"G. Kantor, D. Witters, J. Greiser","doi":"10.1109/MWSYM.1977.1124459","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124459","url":null,"abstract":"A direct contact applicator, specifically designed for microwave diathermy, is described. Its performance characteristics are a circularly polarized field pattern, a relatively uniform heating pattern and low leakage radiation.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130979652","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124422
A. H. Barrett, P. Myers
Microwave thermography is the noninvasive detection of subcutaneous temperatures. Measurements at 1.3 and 3.3 GHz on several thousand patients in a breast cancer detection clinic show a true-positive detection rate of seventy percent and when combined with infrared thermography a rate of ninety percent is obtained.
{"title":"Microwave Thermography as a Diagnostic Tool for the Detection of Cancer (Abstract)","authors":"A. H. Barrett, P. Myers","doi":"10.1109/MWSYM.1977.1124422","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124422","url":null,"abstract":"Microwave thermography is the noninvasive detection of subcutaneous temperatures. Measurements at 1.3 and 3.3 GHz on several thousand patients in a breast cancer detection clinic show a true-positive detection rate of seventy percent and when combined with infrared thermography a rate of ninety percent is obtained.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125811922","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124470
G. Pfitzenmaier
The paper treats the synthesis and realization of a six-cavity dual-TE/sub 101/-mode bandpass filter exhibiting all four theoretically possible attenuation poles at finite frequencies. A novel arrangement of the cavities in the dual-mode resonators effects the feasibility of an exact elliptic filter taking the place of the well known six-cavity pseudo-elliptic filter, which presents only two attenuation poles at finite frequencies. Measured curves of an example of implementation at 4 GHz show the results to be in good agreement with the theoretical responses.
{"title":"An Exact Solution for a Six-Cavity Dual-Mode Elliptic Bandpass Filter","authors":"G. Pfitzenmaier","doi":"10.1109/MWSYM.1977.1124470","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124470","url":null,"abstract":"The paper treats the synthesis and realization of a six-cavity dual-TE/sub 101/-mode bandpass filter exhibiting all four theoretically possible attenuation poles at finite frequencies. A novel arrangement of the cavities in the dual-mode resonators effects the feasibility of an exact elliptic filter taking the place of the well known six-cavity pseudo-elliptic filter, which presents only two attenuation poles at finite frequencies. Measured curves of an example of implementation at 4 GHz show the results to be in good agreement with the theoretical responses.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116797181","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124471
C. Mok, N. Epstein
This paper describes lightweight GFEC 4 GHz multiplexer, consisting of dual mode quasi elIiptic fiIters mounted on a waveguide manifold. These filters are for use in communications satelIites to meet the high performance requirements with state-of-the-art technology. Experimental results of a typical channel are given, and spurious performance of these filters is discussed. Thermal results of the filters indicate an average frequency shift of about 0.5 MHz over 50/spl deg/C.
{"title":"All GFEC Dual Mode Quasi Elliptic Multiplexers for Satellite Transponders","authors":"C. Mok, N. Epstein","doi":"10.1109/MWSYM.1977.1124471","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124471","url":null,"abstract":"This paper describes lightweight GFEC 4 GHz multiplexer, consisting of dual mode quasi elIiptic fiIters mounted on a waveguide manifold. These filters are for use in communications satelIites to meet the high performance requirements with state-of-the-art technology. Experimental results of a typical channel are given, and spurious performance of these filters is discussed. Thermal results of the filters indicate an average frequency shift of about 0.5 MHz over 50/spl deg/C.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114471465","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 : 1977-06-21DOI: 10.1109/MWSYM.1977.1124491
R. Burton, J.D. Selim
A technique has been devised using infrared detection of I/sup 2/R heating of conducting materials to determine the surface charge and current distributions on various objects. The measurement process is explained and comparisons between experimentally determined and actual charge and current distributions are presented.
{"title":"Infrared Detection of Surface Charge and Current Distributions","authors":"R. Burton, J.D. Selim","doi":"10.1109/MWSYM.1977.1124491","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124491","url":null,"abstract":"A technique has been devised using infrared detection of I/sup 2/R heating of conducting materials to determine the surface charge and current distributions on various objects. The measurement process is explained and comparisons between experimentally determined and actual charge and current distributions are presented.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"145 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128894419","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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