Pub Date : 1986-06-02DOI: 10.1109/MWSYM.1986.1132186
M. Lajugie, F. Grossier, A. Silbermann, Y. Bender
A novel large-signal model implemented on the nonlinear time-domain program CIRCEC leads to accurate prediction of all the GaAs MESFET characteristics, needed for the design of a power amplifier. The good agreement between measured and modeled load-pull contours validates the chosen trends.
{"title":"Full Characterization of GaAs Power MESFET and Accurate Load-Pull Contours Prediction","authors":"M. Lajugie, F. Grossier, A. Silbermann, Y. Bender","doi":"10.1109/MWSYM.1986.1132186","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132186","url":null,"abstract":"A novel large-signal model implemented on the nonlinear time-domain program CIRCEC leads to accurate prediction of all the GaAs MESFET characteristics, needed for the design of a power amplifier. The good agreement between measured and modeled load-pull contours validates the chosen trends.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133772144","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132233
W. Brown
A complete microwave power transmission system for a long-endurance, high-altitude (60,000 ft.) airship is described. The system includes an electronically steerable, active phased-array consisting of thousands of identical radiating modules to beam the power, and a light weight, thin-film rectenna mounted on the underside of the airship to absorb and rectifying the incoming microwave power. Application to an airplane is also discussed.
{"title":"A Microwaver Powered, Long Duration, High Altitude Platform","authors":"W. Brown","doi":"10.1109/MWSYM.1986.1132233","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132233","url":null,"abstract":"A complete microwave power transmission system for a long-endurance, high-altitude (60,000 ft.) airship is described. The system includes an electronically steerable, active phased-array consisting of thousands of identical radiating modules to beam the power, and a light weight, thin-film rectenna mounted on the underside of the airship to absorb and rectifying the incoming microwave power. Application to an airplane is also discussed.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134530436","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132249
F. Sabet-Peyman, K. Chau, I. Chang
Development of wideband transducers coupled with frequency dependent beam steering of Bulk Acoustic Waves (BAW) in low loss single crystals provide a great opportunity for efficient channelization of broad band microwave signals. Due to material anisotropy, phase and group velocity collinearity represents in many instances a constraint that must be taken into account in a given design. The work presented in this paper deals with the diffraction process in BAW channelizers/spectrum analyzers in a general way. Our diffraction model is based on Huygen's principle to predict the pressure field in a longitudinal device for various input frequencies. The formulation is applied to compute generalized wave disturbances due to an apodized/unapodized linear phased input array and a curved reflector. The material is YAG where parabolic approximation to the slowness curve is valid for the required steering angles.
{"title":"Wideband RF Channelization Using Frequency-Dependent Beam Steering of Focused Bulk Acoustic Waves","authors":"F. Sabet-Peyman, K. Chau, I. Chang","doi":"10.1109/MWSYM.1986.1132249","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132249","url":null,"abstract":"Development of wideband transducers coupled with frequency dependent beam steering of Bulk Acoustic Waves (BAW) in low loss single crystals provide a great opportunity for efficient channelization of broad band microwave signals. Due to material anisotropy, phase and group velocity collinearity represents in many instances a constraint that must be taken into account in a given design. The work presented in this paper deals with the diffraction process in BAW channelizers/spectrum analyzers in a general way. Our diffraction model is based on Huygen's principle to predict the pressure field in a longitudinal device for various input frequencies. The formulation is applied to compute generalized wave disturbances due to an apodized/unapodized linear phased input array and a curved reflector. The material is YAG where parabolic approximation to the slowness curve is valid for the required steering angles.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133513847","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132255
Seng-Woon Chen, L. Chang, J. Y. Chin
A unified design approach for improving the performance of both regular DRO & Voltage Tuned DRO (VTDRO) is presented with a step-by-step procedure. The novel designs of 23GHz DRO and 18GHz VTDRO are reported together with their experimental results showing superior performance over the previously published results; for example, the frequency- temperature stability at 23GHz has been improved by a factor of four, while the frequency tuning sensitivity at 18GHz by a factor of five.
{"title":"A Unified Design of Dielectric Resonator Oscillators for Telecommunication Systems","authors":"Seng-Woon Chen, L. Chang, J. Y. Chin","doi":"10.1109/MWSYM.1986.1132255","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132255","url":null,"abstract":"A unified design approach for improving the performance of both regular DRO & Voltage Tuned DRO (VTDRO) is presented with a step-by-step procedure. The novel designs of 23GHz DRO and 18GHz VTDRO are reported together with their experimental results showing superior performance over the previously published results; for example, the frequency- temperature stability at 23GHz has been improved by a factor of four, while the frequency tuning sensitivity at 18GHz by a factor of five.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132578386","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132288
C. Gee, I. Newberg, G. Thurmond, H. Yen
A 10-GHz direct laser modulation and an external modulation link were demonstrated. Signal-to-noise ratios of 130 dB/Hz and 115 dB/Hz have has been measured for the external modulation link at 1.3 µm wavelength and for the direct modulation link at 0.83 µm wavelength, respectively.
{"title":"10 GHz RF Fiber Optic Links","authors":"C. Gee, I. Newberg, G. Thurmond, H. Yen","doi":"10.1109/MWSYM.1986.1132288","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132288","url":null,"abstract":"A 10-GHz direct laser modulation and an external modulation link were demonstrated. Signal-to-noise ratios of 130 dB/Hz and 115 dB/Hz have has been measured for the external modulation link at 1.3 µm wavelength and for the direct modulation link at 0.83 µm wavelength, respectively.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133212698","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132308
R. Mansour, R. Macphie
We study the effect of the relative convergence problem on the transmission matrix formulation of cascaded discontinuities. A numerically efficient modified formulation satisfying the edge condition is presented. Application is in the analysis of waveguiding structures in which a number of conductors are placed on various interfaces. Numerical results are presented for double ridged waveguides and fin lines.
{"title":"An Improved Transmission Matrix Formulation of Cascaded Discontinuities and its Application to E-Plane Circuits","authors":"R. Mansour, R. Macphie","doi":"10.1109/MWSYM.1986.1132308","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132308","url":null,"abstract":"We study the effect of the relative convergence problem on the transmission matrix formulation of cascaded discontinuities. A numerically efficient modified formulation satisfying the edge condition is presented. Application is in the analysis of waveguiding structures in which a number of conductors are placed on various interfaces. Numerical results are presented for double ridged waveguides and fin lines.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122154001","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132213
K. Crowley
The microwave semiconductor industry is changing. Unit demand is rising and pressure to reduce price per function follows. If the industry is to meet these challenges, it must evolve rapidly. Analysis of the digital silicon industry may provide clues as to how to proceed.
{"title":"Advances in Low-Cost Component Manufacturing: Avantek's Die Manufacturing Facility in Newark, California","authors":"K. Crowley","doi":"10.1109/MWSYM.1986.1132213","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132213","url":null,"abstract":"The microwave semiconductor industry is changing. Unit demand is rising and pressure to reduce price per function follows. If the industry is to meet these challenges, it must evolve rapidly. Analysis of the digital silicon industry may provide clues as to how to proceed.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124868788","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132131
A. K. Agrawal, Gerald F. Mikucki
A directional coupler in the form of a hybrid ring particularly suited for printed circuits is described. The maximum power-split ratio between the two output ports of a printed- circuit conventional hybrid ring coupler is limited by the highest impedance line that can be realized. The hybrid-ring directional coupler described in this paper allows a larger power-split ratio for the same impedance lines, and thereby increases the range of the power-split ratio that can be realized for printed circuits. A theoretical analysis was conducted using the scattering matrix, and experimental verification of the theoretical results was achieved in a stripline configuration at Ku-band.
{"title":"A Printed Circuit Hybrid-Ring Directional Coupler for Arbitrary Power Divisions","authors":"A. K. Agrawal, Gerald F. Mikucki","doi":"10.1109/MWSYM.1986.1132131","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132131","url":null,"abstract":"A directional coupler in the form of a hybrid ring particularly suited for printed circuits is described. The maximum power-split ratio between the two output ports of a printed- circuit conventional hybrid ring coupler is limited by the highest impedance line that can be realized. The hybrid-ring directional coupler described in this paper allows a larger power-split ratio for the same impedance lines, and thereby increases the range of the power-split ratio that can be realized for printed circuits. A theoretical analysis was conducted using the scattering matrix, and experimental verification of the theoretical results was achieved in a stripline configuration at Ku-band.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125014253","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132113
K. Shibata, K. Nakayama, M. Ohtsubo, H. Kawasaki, S. Hori, K. Kamei
A 20 GHz-band low-noise amplifier has been developed by using newly developed 0.25-µm gate HEMTs. The amplifier has been fabricated by cascading six single-ended unit amplifiers without any isolators at the interstages. The HEMT amplifier exhibits a noise temperature of 170 K (NF = 2.0 dB) and a gain of 47 dB over 17.5 to 19.5 GHz in an uncooled operation. Noise temperatures of 130 K (NF = 1.6 dB) and 110 K (NF = 1.4 dB) have been obtained at -20°C and -50°C, respectively.
采用新研制的0.25µm栅极hemt，研制了一种20 ghz频段的低噪声放大器。该放大器由6个单端单元级联而成，级间无隔离器。HEMT放大器在非冷却工作时的噪声温度为170 K (NF = 2.0 dB)，增益为47 dB，工作频率为17.5至19.5 GHz。在-20℃和-50℃条件下，噪声温度分别为130 K (NF = 1.6 dB)和110 K (NF = 1.4 dB)。
{"title":"20 GHz-Band Low-Noise HEMT Amplifier","authors":"K. Shibata, K. Nakayama, M. Ohtsubo, H. Kawasaki, S. Hori, K. Kamei","doi":"10.1109/MWSYM.1986.1132113","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132113","url":null,"abstract":"A 20 GHz-band low-noise amplifier has been developed by using newly developed 0.25-µm gate HEMTs. The amplifier has been fabricated by cascading six single-ended unit amplifiers without any isolators at the interstages. The HEMT amplifier exhibits a noise temperature of 170 K (NF = 2.0 dB) and a gain of 47 dB over 17.5 to 19.5 GHz in an uncooled operation. Noise temperatures of 130 K (NF = 1.6 dB) and 110 K (NF = 1.4 dB) have been obtained at -20°C and -50°C, respectively.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127925806","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 : 1986-06-02DOI: 10.1109/MWSYM.1986.1132271
P. Siegel
A design for a combined planar mixer/antenna for use at near millimeter and submillimeter wave-lengths is described. The antenna is one of the class of planar log-periodic structures originally developed by DuHamel and Isbell. The active mixing element may be separately mounted or fully integrated with the antenna and can be either a planar Schottky diode or SIS (superconductor insulator superconductor) junction. The results of extensive antenna pattern and impedance measurements made on a microwave scale model are discussed. It is felt that the proposed mixtenna structure is suitable as a moderate bandwidth receiver or as an element of a focal plane or limited scan phased array.
{"title":"A Planar Log-Periodic Mixtenna for Millimeter and Submillimeter Wavelengths","authors":"P. Siegel","doi":"10.1109/MWSYM.1986.1132271","DOIUrl":"https://doi.org/10.1109/MWSYM.1986.1132271","url":null,"abstract":"A design for a combined planar mixer/antenna for use at near millimeter and submillimeter wave-lengths is described. The antenna is one of the class of planar log-periodic structures originally developed by DuHamel and Isbell. The active mixing element may be separately mounted or fully integrated with the antenna and can be either a planar Schottky diode or SIS (superconductor insulator superconductor) junction. The results of extensive antenna pattern and impedance measurements made on a microwave scale model are discussed. It is felt that the proposed mixtenna structure is suitable as a moderate bandwidth receiver or as an element of a focal plane or limited scan phased array.","PeriodicalId":109161,"journal":{"name":"1986 IEEE MTT-S International Microwave Symposium Digest","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129502840","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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