Pub Date : 1977-12-01DOI: 10.1109/MWSYM.1977.1124494
E. Niehenke
A 14 oz, low noise, X-band parametric amplifier has been developed for an airborne environment (-55/spl deg/ to +71 /spl deg/C). This unit exhibits a 1.8 dB noise figure at 10 GHz and, at 18 dB peak gain, a 3 dB single-tuned bandwidth of 230 MHz that is electronically tunable over 700 MHz. A 1 dB gain compression occurs at -27 dBm input power. Performance is achieved through use of unique upper sideband terminated circuitry and a new low-parasitic, hermetic varactor package.
{"title":"An Environmentalized Low-Noise Parametric Amplifier","authors":"E. Niehenke","doi":"10.1109/MWSYM.1977.1124494","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124494","url":null,"abstract":"A 14 oz, low noise, X-band parametric amplifier has been developed for an airborne environment (-55/spl deg/ to +71 /spl deg/C). This unit exhibits a 1.8 dB noise figure at 10 GHz and, at 18 dB peak gain, a 3 dB single-tuned bandwidth of 230 MHz that is electronically tunable over 700 MHz. A 1 dB gain compression occurs at -27 dBm input power. Performance is achieved through use of unique upper sideband terminated circuitry and a new low-parasitic, hermetic varactor package.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123181358","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.1977.1124503
C. Chao
A new circuit configuration for odd number N-way power combiner/dividers is discussed, with emphasis on a planar microstrip structure. Theoretical results and experimental confirmation are included for a variety of odd number power divisions.
{"title":"A New Odd Number N-Way Power Combiner/Divider","authors":"C. Chao","doi":"10.1109/MWSYM.1977.1124503","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124503","url":null,"abstract":"A new circuit configuration for odd number N-way power combiner/dividers is discussed, with emphasis on a planar microstrip structure. Theoretical results and experimental confirmation are included for a variety of odd number power divisions.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"96 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":"116894228","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.1977.1124446
H. van de Vaart, L. Solie
A new type of pulse compression filter is described using the Reflective Dot Array (RDA). The RDA is similar to the Reflective Array Compressor (RAC), except that the array of reflecting grooves is replaced by an array of reflecting metallic dots. The RDA has the principal advantage of being part of the same mask and metalization as the interdigital transducers, allowing single step fabrication. A linear FM filter was developed with a center frequency of 60 MHz, bandwidth of 20 MHz and differential time delay of 10 mu s, with less than 4/slp deg/ of rms phase deviation from quadratic without phase compensating film, showing that high performance pulse compression filters can be produced at low cost.
{"title":"A SAW Pulse Compression Filter Using the Reflective Dot Array","authors":"H. van de Vaart, L. Solie","doi":"10.1109/MWSYM.1977.1124446","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124446","url":null,"abstract":"A new type of pulse compression filter is described using the Reflective Dot Array (RDA). The RDA is similar to the Reflective Array Compressor (RAC), except that the array of reflecting grooves is replaced by an array of reflecting metallic dots. The RDA has the principal advantage of being part of the same mask and metalization as the interdigital transducers, allowing single step fabrication. A linear FM filter was developed with a center frequency of 60 MHz, bandwidth of 20 MHz and differential time delay of 10 mu s, with less than 4/slp deg/ of rms phase deviation from quadratic without phase compensating film, showing that high performance pulse compression filters can be produced at low cost.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"28 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":"117111708","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.1977.1124506
T. Nagao
Diplexer and broadbanding operations of stripline Y-junction circulators are reported. The former is realized, involving a combination of positive-sense and negative-sense circulations, in the Y-junction loaded with conductor-ferrite composites. The latter is performed with conductor-dielectric-ferrite composites. The frequency band, changeable with a biasing magnetic field, reached 45 percent in the experiment when four circulations were put into use. These operations are treated only above resonance.
{"title":"Diplexer and Broadbanding Operations of Stripline Y-Junction Circulators","authors":"T. Nagao","doi":"10.1109/MWSYM.1977.1124506","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124506","url":null,"abstract":"Diplexer and broadbanding operations of stripline Y-junction circulators are reported. The former is realized, involving a combination of positive-sense and negative-sense circulations, in the Y-junction loaded with conductor-ferrite composites. The latter is performed with conductor-dielectric-ferrite composites. The frequency band, changeable with a biasing magnetic field, reached 45 percent in the experiment when four circulations were put into use. These operations are treated only above resonance.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"105 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":"117206587","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.1977.1124453
E. C. Burdette, J. Seals, J. Toler, F. Cain, R. Magin
The induction of hyperthermia into neoplastic tissues using electromagnetic radiation depends significantly upon the electrical properties of the tissues of interest. An in-vivo measurement probe based upon an antenna modelling theorem was designed and a measurement system that is capable of performing accurate in-vivo measurements has been developed and tested on several standard materials. This measurement probe and system were used to perform dielectric measurements on normal and neoplastic tissues from 0.01 to 2.0 GHz. The preliminary results of measurements performed on six malignant tumor types in mice are compared with results obtained on normal muscle tissue and on phantom modelling materials. The trends of the in-vivo measurements show differences that indicate the possibility of using such data and techniques in various types of future cancer research.
{"title":"Preliminary In-Vivo Probe Measurements of Electrical Properties of Tumors in Mice","authors":"E. C. Burdette, J. Seals, J. Toler, F. Cain, R. Magin","doi":"10.1109/MWSYM.1977.1124453","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124453","url":null,"abstract":"The induction of hyperthermia into neoplastic tissues using electromagnetic radiation depends significantly upon the electrical properties of the tissues of interest. An in-vivo measurement probe based upon an antenna modelling theorem was designed and a measurement system that is capable of performing accurate in-vivo measurements has been developed and tested on several standard materials. This measurement probe and system were used to perform dielectric measurements on normal and neoplastic tissues from 0.01 to 2.0 GHz. The preliminary results of measurements performed on six malignant tumor types in mice are compared with results obtained on normal muscle tissue and on phantom modelling materials. The trends of the in-vivo measurements show differences that indicate the possibility of using such data and techniques in various types of future cancer research.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"20 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":"127181363","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.1977.1124437
J. Plourde, D. Linn
Dielectric resonators utilizing Ba/sub 2/Ti/sub 9/O/sub 20/ ceramic yield high Q's (Q = 8000-10000) along with excellent temperature stability (T/sub f/ = 0-2 ppm//spl deg/C) at 4 GHz. Integrable bandpass and bandreject filters having low losses and excellent temperature stability are obtained in structures containing Ba/sub 2/Ti/sub 9/O/sub 20/ resonators coupled to either stripline or waveguide.
{"title":"Microwave Dielectric Resonator Filters Utilizing Ba/sub 2/Ti/sub 9/O/sub 20/ Ceramics","authors":"J. Plourde, D. Linn","doi":"10.1109/MWSYM.1977.1124437","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124437","url":null,"abstract":"Dielectric resonators utilizing Ba/sub 2/Ti/sub 9/O/sub 20/ ceramic yield high Q's (Q = 8000-10000) along with excellent temperature stability (T/sub f/ = 0-2 ppm//spl deg/C) at 4 GHz. Integrable bandpass and bandreject filters having low losses and excellent temperature stability are obtained in structures containing Ba/sub 2/Ti/sub 9/O/sub 20/ resonators coupled to either stripline or waveguide.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"58 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":"117032902","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.1977.1124521
D. Rubin
Speaking for the San Diego MTT Steering Committee, I hope you will find the 1977 International Microwave Symposium to be personally rewarding, one that you will remember for a long time.
{"title":"Forward, 1977 IEEE MTT-S International Microwave Symposium","authors":"D. Rubin","doi":"10.1109/MWSYM.1977.1124521","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124521","url":null,"abstract":"Speaking for the San Diego MTT Steering Committee, I hope you will find the 1977 International Microwave Symposium to be personally rewarding, one that you will remember for a long time.","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":"129625926","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.1977.1124425
H. Moroson, S. Stowe, M. Schechter
We have treated a metatasizing tumor in the rat with hyperthermia, as welI as the contralateral normal Iimb by immersion in a 43 C bath. Whole body (rectal) temperatures were allowed to reach 40.5 - 41.0 C for one hour, and possible harmful effects on the host immune system investigated. Treatment which caused regression of the primary tumor also significantly reduced extent of retroperitoneal metastases. Lymphocytotoxicity against tumor target celIs in vitro assayed one and two days after hyperthermia revealed no reduction in celI mediated immunity.
{"title":"Hyperthermia: Healing and Hazard in Tumor Bearing Rats","authors":"H. Moroson, S. Stowe, M. Schechter","doi":"10.1109/MWSYM.1977.1124425","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124425","url":null,"abstract":"We have treated a metatasizing tumor in the rat with hyperthermia, as welI as the contralateral normal Iimb by immersion in a 43 C bath. Whole body (rectal) temperatures were allowed to reach 40.5 - 41.0 C for one hour, and possible harmful effects on the host immune system investigated. Treatment which caused regression of the primary tumor also significantly reduced extent of retroperitoneal metastases. Lymphocytotoxicity against tumor target celIs in vitro assayed one and two days after hyperthermia revealed no reduction in celI mediated immunity.","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":"129790147","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.1977.1124465
P. Meier
Recent progress with a class of planar millimeter circuits is reported. The potential of such circuits is demonstrated by examples which include a wideband low-loss 5-mm PIN attenuator, high-Q (1600 to 1735) planar filters, and a new type of printed-circuit directional coupler.
{"title":"Planar Multiport Millimeter Integrated Circuits","authors":"P. Meier","doi":"10.1109/MWSYM.1977.1124465","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124465","url":null,"abstract":"Recent progress with a class of planar millimeter circuits is reported. The potential of such circuits is demonstrated by examples which include a wideband low-loss 5-mm PIN attenuator, high-Q (1600 to 1735) planar filters, and a new type of printed-circuit directional coupler.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"93 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":"126684221","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.1977.1124401
B. Geller, M. Cohn
A push-pull power amplifier, in which the required anti-phase RF voltages result from the use of inherently symmetric and frequency-independent slot line tees, is described. Measurements of the fundamental and hamonic response of this amplifier, which uses an unpackaged, two-cell FET chip and exhibits the well known fourfold impedance advantage over parallel operation, are reported.
{"title":"An MIC Push-Pull FET Amplifier","authors":"B. Geller, M. Cohn","doi":"10.1109/MWSYM.1977.1124401","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124401","url":null,"abstract":"A push-pull power amplifier, in which the required anti-phase RF voltages result from the use of inherently symmetric and frequency-independent slot line tees, is described. Measurements of the fundamental and hamonic response of this amplifier, which uses an unpackaged, two-cell FET chip and exhibits the well known fourfold impedance advantage over parallel operation, are reported.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"127 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":"114857002","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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