Pub Date : 1981-06-15DOI: 10.1109/MWSYM.1981.1129949
S.E. Hamilton, G. Stern
Application of pulsed GaAs IMPATT modules for phased array radiators is examined. Measured intrapulse phase and gain variations are presented. Module hardware and statistical pattern effects for a small-diameter phased array are discussed.
{"title":"Small Active Phased Array Characteristics with GaAs Impatt Amplifier Modules","authors":"S.E. Hamilton, G. Stern","doi":"10.1109/MWSYM.1981.1129949","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129949","url":null,"abstract":"Application of pulsed GaAs IMPATT modules for phased array radiators is examined. Measured intrapulse phase and gain variations are presented. Module hardware and statistical pattern effects for a small-diameter phased array are discussed.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"26 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":"115726667","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.1981.1129888
R. Tenenholtz
An MIC 0.75 inch diameter VHF/UHF switch module employing packageless diodes has been developed that operates over two octaves in the 20-500 MHz range. It has been tested up to 2.0 KW CW!! This represents a factor of 10 in power greater than previously reported. Several switch assemblies employing this module design are described and test results presented.
{"title":"A 2000 Watt CW MIC 20-500 MHz SPDT Pin Diode Switch Module","authors":"R. Tenenholtz","doi":"10.1109/MWSYM.1981.1129888","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129888","url":null,"abstract":"An MIC 0.75 inch diameter VHF/UHF switch module employing packageless diodes has been developed that operates over two octaves in the 20-500 MHz range. It has been tested up to 2.0 KW CW!! This represents a factor of 10 in power greater than previously reported. Several switch assemblies employing this module design are described and test results presented.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"25 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":"114782460","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.1981.1129941
S. Kumar, W. J. Chudobiak, J. Wight
Direct generation of a modulated signal at microwave frequencies offers considerable simplicity and economy in the transmitter of a microwave communication system. Minimum-shift-keying (MSK) is a digital modulation which yields the same bit-error-rate performance as coherent PSK even though this modulation may be generated as a continuous phase frequency-shift- keying. Utilizing this feature of MSK, this paper describes novel circuits for generation of MSK modulation at microwave frequencies.
{"title":"Direct Generation of MSK Modulation at Microwave Frequencies","authors":"S. Kumar, W. J. Chudobiak, J. Wight","doi":"10.1109/MWSYM.1981.1129941","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129941","url":null,"abstract":"Direct generation of a modulated signal at microwave frequencies offers considerable simplicity and economy in the transmitter of a microwave communication system. Minimum-shift-keying (MSK) is a digital modulation which yields the same bit-error-rate performance as coherent PSK even though this modulation may be generated as a continuous phase frequency-shift- keying. Utilizing this feature of MSK, this paper describes novel circuits for generation of MSK modulation at microwave frequencies.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"19 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":"114671107","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.1981.1129968
N. L. Campbell, J. Drewe
Small samples of frozen human packed red blood cells (RBCs) were thawed by microwave heating (2450 MHz) and by water bath heating. The functional integrity of the cells was measured before and after thaw, and over a 6-hour period after wash. Minor differences between microwave and water thawed RBCs were observed.
{"title":"Microwave Thawing of Frozen Packed Red Blood Cells","authors":"N. L. Campbell, J. Drewe","doi":"10.1109/MWSYM.1981.1129968","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129968","url":null,"abstract":"Small samples of frozen human packed red blood cells (RBCs) were thawed by microwave heating (2450 MHz) and by water bath heating. The functional integrity of the cells was measured before and after thaw, and over a 6-hour period after wash. Minor differences between microwave and water thawed RBCs were observed.","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":"114673500","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.1981.1129896
G. Thomas
A new approach to nonlinear gyro-deivce theory is presented. This approach is based upon the soliton concept. The general gyro-device equation is derived and solved for its soliton solutions. Two different amplification regimes are analyzed and comparisons are made with linear theory.
{"title":"A Nonlinear Gyro-Device Theory","authors":"G. Thomas","doi":"10.1109/MWSYM.1981.1129896","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129896","url":null,"abstract":"A new approach to nonlinear gyro-deivce theory is presented. This approach is based upon the soliton concept. The general gyro-device equation is derived and solved for its soliton solutions. Two different amplification regimes are analyzed and comparisons are made with linear theory.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"37 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":"127114672","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.1981.1129962
R. Paglione, F. Sterzer, J. Mendecki, E. Friedenthal, C. Botstein
The design of a 27 MHz ridged-waveguide applicator for use in localized hyperthermia treatment of cancer is described. The design includes considerations for mechanical constraints and for the size and location of tumors. Results of animal and clinical experiments are given.
{"title":"27 MHz Waveguide Applicators for Localized Hyperthermia Treatment of Cancer","authors":"R. Paglione, F. Sterzer, J. Mendecki, E. Friedenthal, C. Botstein","doi":"10.1109/MWSYM.1981.1129962","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129962","url":null,"abstract":"The design of a 27 MHz ridged-waveguide applicator for use in localized hyperthermia treatment of cancer is described. The design includes considerations for mechanical constraints and for the size and location of tumors. Results of animal and clinical experiments are given.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"451 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":"124294294","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.1981.1129965
C. Hochuli, G. Kantor
In support of the BRH proposed microwave diathermy standard, temperature measurements in fat-muscle phantoms using thermography and a non-perturbing temperature probe were investigated. These probe data indicate significant thermography errors.
{"title":"Non-Pertubing Temperature Probe and Thermography Measurements in Microwave Diathermy","authors":"C. Hochuli, G. Kantor","doi":"10.1109/MWSYM.1981.1129965","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129965","url":null,"abstract":"In support of the BRH proposed microwave diathermy standard, temperature measurements in fat-muscle phantoms using thermography and a non-perturbing temperature probe were investigated. These probe data indicate significant thermography errors.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"45 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":"122782599","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.1981.1129874
A. Giarola, D. Rogers
The integral-equation method was used in the analysis of inhomogeneous broadside-coupled striplines. The method is general and may also account for dielectric anisotropy. Curves to characterize suspended broadside-coupled microstrip lines with isotropic and anisotropic substrates are shown as examples.
{"title":"Inhomogeneous Broadside-Coupled Striplines","authors":"A. Giarola, D. Rogers","doi":"10.1109/MWSYM.1981.1129874","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129874","url":null,"abstract":"The integral-equation method was used in the analysis of inhomogeneous broadside-coupled striplines. The method is general and may also account for dielectric anisotropy. Curves to characterize suspended broadside-coupled microstrip lines with isotropic and anisotropic substrates are shown as examples.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"34 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":"121559799","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.1981.1129857
R. Bonetti, A. Atia
A lumped element circuit model is introduced to represent coupling between a cylindrical dielectric resonator and a microstrip line. The external Q of the structure is computed and compared to experimental data obtained with three different resonators.
{"title":"Coupling of Cylindrical Dielectric Resonators to Microstrip Lines","authors":"R. Bonetti, A. Atia","doi":"10.1109/MWSYM.1981.1129857","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129857","url":null,"abstract":"A lumped element circuit model is introduced to represent coupling between a cylindrical dielectric resonator and a microstrip line. The external Q of the structure is computed and compared to experimental data obtained with three different resonators.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"196 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":"123220120","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.1981.1129827
A. Podcameni, M. L. Coimbra
The two-stub transition design is analysed on isotropic and anisotropic substrates. Broadband design is made by optimizing the slotline and the stub lengths. Sensibility analysis of the behaviour of the whole structure with these parameters shows the slotline length and impedance to be the dominant factors. An extended-octave design can easily be achieved, with VWSR less than 1.5, for double-transitions.
{"title":"Slotline-Microstrip Transition on Iso/Anisotropic Substrate : Broadband Design","authors":"A. Podcameni, M. L. Coimbra","doi":"10.1109/MWSYM.1981.1129827","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129827","url":null,"abstract":"The two-stub transition design is analysed on isotropic and anisotropic substrates. Broadband design is made by optimizing the slotline and the stub lengths. Sensibility analysis of the behaviour of the whole structure with these parameters shows the slotline length and impedance to be the dominant factors. An extended-octave design can easily be achieved, with VWSR less than 1.5, for double-transitions.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"31 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":"123275061","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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