Pub Date : 1977-06-21DOI: 10.1109/MWSYM.1977.1124498
M. Hines
A time-domain technique is presented for the analysis of mixers. Three simple circuit models using "ideal diodes" have been analyzed exactly, yielding values for their optimum impedance conditions and expressions for the conversion coefficients for all small-signal first-order conversion products. Some new physical insights are obtained. Without image rejection, 3.92 dB conversion loss is the minimum for an untuned mixer, 3.36 dB with single-stub tuning, and 3.0 dB with resonator tuning. For the optimum bias level and IF impedance, no image signal is generated in any of these cases. With an image band-stop filter, lower conversion loss is predicted when the impedances are changed, but, the improvement predicted is small unless the conversion loss without the image filter can approach 3.0 dB.
{"title":"Image Conversion Effects in Diode Mixers","authors":"M. Hines","doi":"10.1109/MWSYM.1977.1124498","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124498","url":null,"abstract":"A time-domain technique is presented for the analysis of mixers. Three simple circuit models using \"ideal diodes\" have been analyzed exactly, yielding values for their optimum impedance conditions and expressions for the conversion coefficients for all small-signal first-order conversion products. Some new physical insights are obtained. Without image rejection, 3.92 dB conversion loss is the minimum for an untuned mixer, 3.36 dB with single-stub tuning, and 3.0 dB with resonator tuning. For the optimum bias level and IF impedance, no image signal is generated in any of these cases. With an image band-stop filter, lower conversion loss is predicted when the impedances are changed, but, the improvement predicted is small unless the conversion loss without the image filter can approach 3.0 dB.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"21 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":"127613604","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.1977.1124369
S. P. Kwok, K. Weller
A hybrid MIC X-band Doppler sensor module using a BARRITT device in the self-mixing mode has been developed. The module is compact, low cost, and sensitive. A return loss sensitivity of -137dB/Hz was achieved with the module.
{"title":"Low Cost X-Band MIC BARITT Doppler Sensor (Abstract)","authors":"S. P. Kwok, K. Weller","doi":"10.1109/MWSYM.1977.1124369","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124369","url":null,"abstract":"A hybrid MIC X-band Doppler sensor module using a BARRITT device in the self-mixing mode has been developed. The module is compact, low cost, and sensitive. A return loss sensitivity of -137dB/Hz was achieved with the module.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"18 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":"128992379","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.1977.1124475
H. Thal
The losses in coupled cavity filters due to coupling apertures, tuning screws and surface roughness have been determined experimentally. This information can be used to predict and minimize the insertion loss in various filter configurations.
{"title":"Loss Mechanisms in Coupled Cavity Filters","authors":"H. Thal","doi":"10.1109/MWSYM.1977.1124475","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124475","url":null,"abstract":"The losses in coupled cavity filters due to coupling apertures, tuning screws and surface roughness have been determined experimentally. This information can be used to predict and minimize the insertion loss in various filter configurations.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"22 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":"129189253","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.1977.1124371
T. Berceli
FM distortion in injection locked diode oscillators is investigated both theoretically and experimentally. At the lower frequency end of the locking band, the distortion is rather high. Hence the distortion is decreased with increasing frequency and a minimum is achieved at a frequency higher than the band center.
{"title":"FM Distortion in Single and Cascaded Injection Locked Diode Oscillators","authors":"T. Berceli","doi":"10.1109/MWSYM.1977.1124371","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124371","url":null,"abstract":"FM distortion in injection locked diode oscillators is investigated both theoretically and experimentally. At the lower frequency end of the locking band, the distortion is rather high. Hence the distortion is decreased with increasing frequency and a minimum is achieved at a frequency higher than the band center.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"111 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":"122303214","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.1977.1124484
M. Cuhaci, D. James
For the fundamental mode, experimental results reveal a slightly higher radiation Q-factor for the triangular microstrip resonator than for the corresponding circular geometry. Theoretical results have been computed for the triangle case. Radiation patterns and interesting circuit applications for the triangle resonator have also been investigated.
{"title":"Radiation from Triangular and Circular Resonators in Microstrip","authors":"M. Cuhaci, D. James","doi":"10.1109/MWSYM.1977.1124484","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124484","url":null,"abstract":"For the fundamental mode, experimental results reveal a slightly higher radiation Q-factor for the triangular microstrip resonator than for the corresponding circular geometry. Theoretical results have been computed for the triangle case. Radiation patterns and interesting circuit applications for the triangle resonator have also been investigated.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"108 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":"115829395","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.1977.1124514
N. Williams, A. Rudge, S. Gibbs
The paper describes the design construction and experimental evaluation of a novel frequency scanning linear array. Dielectric image-line is used to provide a compact low-loss feed network which is integrated with dielectric-rod antenna radiators to produce arrays which are well suited for applications at frequencies above 20GHz.
{"title":"Millimetre-Wave Insular Guide Frequency Scanned Array","authors":"N. Williams, A. Rudge, S. Gibbs","doi":"10.1109/MWSYM.1977.1124514","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124514","url":null,"abstract":"The paper describes the design construction and experimental evaluation of a novel frequency scanning linear array. Dielectric image-line is used to provide a compact low-loss feed network which is integrated with dielectric-rod antenna radiators to produce arrays which are well suited for applications at frequencies above 20GHz.","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":"122500272","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.1977.1124469
A. Atia, A.E. Williams
This paper presents a new dual mode circular waveguide cavity structure which realizes the general class of coupled cavity transfer functions. Included are the exact elliptic function response and the linear phase and arbitrary phase responses. Experimental data taken on 4- and 8-pole narrowband elliptic function filters centered at approximately 4 GHz are described and shown to correlate well with theory.
{"title":"Dual Mode Canonical Waveguide Filters","authors":"A. Atia, A.E. Williams","doi":"10.1109/MWSYM.1977.1124469","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124469","url":null,"abstract":"This paper presents a new dual mode circular waveguide cavity structure which realizes the general class of coupled cavity transfer functions. Included are the exact elliptic function response and the linear phase and arbitrary phase responses. Experimental data taken on 4- and 8-pole narrowband elliptic function filters centered at approximately 4 GHz are described and shown to correlate well with theory.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"17 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":"131527882","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.1977.1124406
H. Sobol
Microwave digital radios are now entering operational service. 8 PSK RF modulated radios are very attractive for high channel density applications. This paper reviews some of the basic design considerations for digital radios, discusses current state-of-the-art and also markets, present and future.
{"title":"Digital Radio: Systems, Markets and Trends","authors":"H. Sobol","doi":"10.1109/MWSYM.1977.1124406","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124406","url":null,"abstract":"Microwave digital radios are now entering operational service. 8 PSK RF modulated radios are very attractive for high channel density applications. This paper reviews some of the basic design considerations for digital radios, discusses current state-of-the-art and also markets, present and future.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"44 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":"121756837","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.1977.1124378
R. Speciale, N. Franzen
The basic philosophy of the THROUGH-SHORT-DELAY calibration procedure for two-port Automated Network Analyzers, has been extended to n-port S-parameter measurements, while also accounting for the possible signal leakage between all port pairs. The system errors are represented by a 2n-port virtual error network, having n ports connected to the device under test (DUT) and n ports connected to an ideal, error-free multiport network analyzer. The (2n)/sup 2/ T-parameters of the error network are explicitly expressed, in blocks of n/sup 2/ at a time, as matricial functions of the 3n/sup 2/ measured S-parameters of three n-port standards, sequentially replacing the DUT during system calibration. Also the possibility has been proved of correcting the errors arising from repeatable port-impedance value-changes, as those found in switching test sets. This capability has been introduced and tested also in the classical two-port TSD algorithm, by means of minor modification and subsequent post-processing .
{"title":"Super - TSD, A Generalization of the TSD Network Analyzer Calibration Procedure, Covering n - Port Measurements with Leakage","authors":"R. Speciale, N. Franzen","doi":"10.1109/MWSYM.1977.1124378","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124378","url":null,"abstract":"The basic philosophy of the THROUGH-SHORT-DELAY calibration procedure for two-port Automated Network Analyzers, has been extended to n-port S-parameter measurements, while also accounting for the possible signal leakage between all port pairs. The system errors are represented by a 2n-port virtual error network, having n ports connected to the device under test (DUT) and n ports connected to an ideal, error-free multiport network analyzer. The (2n)/sup 2/ T-parameters of the error network are explicitly expressed, in blocks of n/sup 2/ at a time, as matricial functions of the 3n/sup 2/ measured S-parameters of three n-port standards, sequentially replacing the DUT during system calibration. Also the possibility has been proved of correcting the errors arising from repeatable port-impedance value-changes, as those found in switching test sets. This capability has been introduced and tested also in the classical two-port TSD algorithm, by means of minor modification and subsequent post-processing .","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":"130306204","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.1977.1124354
H. Cronson, L. Susman
This paper describes a programmable calculator-controlled six-port system designed to measure S/sub 21/, and S/sub11/, over a wide microwave frequency range without disturbing the device under test. Measurements taken from 7 to 12 GHz show that results within 1% can be obtained.
{"title":"A Six-Port Automatic Network Analyzer","authors":"H. Cronson, L. Susman","doi":"10.1109/MWSYM.1977.1124354","DOIUrl":"https://doi.org/10.1109/MWSYM.1977.1124354","url":null,"abstract":"This paper describes a programmable calculator-controlled six-port system designed to measure S/sub 21/, and S/sub11/, over a wide microwave frequency range without disturbing the device under test. Measurements taken from 7 to 12 GHz show that results within 1% can be obtained.","PeriodicalId":299607,"journal":{"name":"1977 IEEE MTT-S International Microwave Symposium Digest","volume":"11 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":"115646577","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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