Pub Date : 1985-06-04DOI: 10.1109/MWSYM.1985.1132050
B. Dornan, G. Lan, P. Goldgeier, P. Pelka, F. Sechi
Components for a 14 GHz receiver were developed using the Miniature Ceramic Circuit (MCC) technology. These components are remarkable for their small size and high level of integration. MCC technology combines many of the desirable characteristics of the monolithic approach and with the flexibility of the hybrid approach.
{"title":"Miniature Ceramic Circuit Components for Ku Band Receivers","authors":"B. Dornan, G. Lan, P. Goldgeier, P. Pelka, F. Sechi","doi":"10.1109/MWSYM.1985.1132050","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1132050","url":null,"abstract":"Components for a 14 GHz receiver were developed using the Miniature Ceramic Circuit (MCC) technology. These components are remarkable for their small size and high level of integration. MCC technology combines many of the desirable characteristics of the monolithic approach and with the flexibility of the hybrid approach.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129333269","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1132001
J. A. Cooper, K. Thornber
We describe a new monolithic millimeter-wave semiconductor oscillator which is capable of supporting a contiguous sequence of charge domains in the drift channel. The frequency is not determined by a transit time effect, but rather by the spacing between adjacent domains, and can be electrically tuned from a few gigahertz to a few hundred gigahertz.
{"title":"Contiguous-Domain Transferred-Electron Oscillators","authors":"J. A. Cooper, K. Thornber","doi":"10.1109/MWSYM.1985.1132001","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1132001","url":null,"abstract":"We describe a new monolithic millimeter-wave semiconductor oscillator which is capable of supporting a contiguous sequence of charge domains in the drift channel. The frequency is not determined by a transit time effect, but rather by the spacing between adjacent domains, and can be electrically tuned from a few gigahertz to a few hundred gigahertz.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125347946","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1131911
M. Nannicini, P. Magni, F. Oggionni
This report deals with the problem of nonlinearity characteristics in microwave power amplifiers for digital radio link systems with multi-level modulation (ex. 64 QAM); and in particular With reference to their degradations vs temperature variations. Moreover various possible methods of compensation are taken into account. After a brief examination of the not temperature controlled predistortion method operating at intermediate frequency, solutions are suggested to keep the non-linearity characteristics independent from thermal conditions. By presenting the experimental results and the comparative considerations, the use of the "feed-back controlled predistorter" and the "predictive method" is analysed.
{"title":"Temperature Controlled Predistortion Circuits for 64 QAM Microwave Power Amplifiers","authors":"M. Nannicini, P. Magni, F. Oggionni","doi":"10.1109/MWSYM.1985.1131911","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1131911","url":null,"abstract":"This report deals with the problem of nonlinearity characteristics in microwave power amplifiers for digital radio link systems with multi-level modulation (ex. 64 QAM); and in particular With reference to their degradations vs temperature variations. Moreover various possible methods of compensation are taken into account. After a brief examination of the not temperature controlled predistortion method operating at intermediate frequency, solutions are suggested to keep the non-linearity characteristics independent from thermal conditions. By presenting the experimental results and the comparative considerations, the use of the \"feed-back controlled predistorter\" and the \"predictive method\" is analysed.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124476580","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1132033
S. Weinreb, M. Pospieszalski
The four noise parameters of room-temperature and cryogenically-cooled HEMT's have been investigated. Two previously described structures, the quantum- well HEMT [1] and the high-transconductance HEMT [2] have been tested and compared with noise parameters of a MESFET (NE67383). It was demonstrated that the cryogenic noise performance of a HEMT is dependent on light illumination and may be or may not be better than that of a MESFET, depending on the device structure. The minimum noise temperature of T/sub min/ = 10.5 +- 1.5K of the quantum-well HEMT, illuminated with light, measured at f = 8.4 GHz and T/sub a/ = 12.5K is the best yet published for field effect transistors.
{"title":"X-Band Noise Parameters of HEMT Devices at 300K and 12.5K","authors":"S. Weinreb, M. Pospieszalski","doi":"10.1109/MWSYM.1985.1132033","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1132033","url":null,"abstract":"The four noise parameters of room-temperature and cryogenically-cooled HEMT's have been investigated. Two previously described structures, the quantum- well HEMT [1] and the high-transconductance HEMT [2] have been tested and compared with noise parameters of a MESFET (NE67383). It was demonstrated that the cryogenic noise performance of a HEMT is dependent on light illumination and may be or may not be better than that of a MESFET, depending on the device structure. The minimum noise temperature of T/sub min/ = 10.5 +- 1.5K of the quantum-well HEMT, illuminated with light, measured at f = 8.4 GHz and T/sub a/ = 12.5K is the best yet published for field effect transistors.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130453420","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1131986
K. Chang, R. S. Tahim, D. English, A. Grote, T. Pham, Cheng Sun, G. Hayashibara, W. Piotrowski
Various microstrip components, including mixers, IMPATT oscillators, Gunn oscillators, doublers, and circulators, have been developed at W-band with state-of-the-art performance. The use of microstrip drastically reduces fabrication costs due to the less stringent machining tolerance. The design and performance of these components will be reported.
{"title":"W-Band (75 to 110 GHz) Microstrip Components","authors":"K. Chang, R. S. Tahim, D. English, A. Grote, T. Pham, Cheng Sun, G. Hayashibara, W. Piotrowski","doi":"10.1109/MWSYM.1985.1131986","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1131986","url":null,"abstract":"Various microstrip components, including mixers, IMPATT oscillators, Gunn oscillators, doublers, and circulators, have been developed at W-band with state-of-the-art performance. The use of microstrip drastically reduces fabrication costs due to the less stringent machining tolerance. The design and performance of these components will be reported.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132793698","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1131953
B. H. Horne
The current state-of-the-art in multipole SAW Resonator Filters is presented. Applications are discussed including preselector, I.F., and L.O. clean up filers. A brief review of their operation is presented along with a detailed explanation of their capabilities. Various tradeoffs are discussed for filters from 50 MHz to 1 GHz and from 0.02% to 0.2% fractional 3 dB bandwidths. The lntermodulation suppression of SAW Resonator Filters is presented in a later section.
{"title":"SAW Resonator Filters: Applications and Capabilities","authors":"B. H. Horne","doi":"10.1109/MWSYM.1985.1131953","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1131953","url":null,"abstract":"The current state-of-the-art in multipole SAW Resonator Filters is presented. Applications are discussed including preselector, I.F., and L.O. clean up filers. A brief review of their operation is presented along with a detailed explanation of their capabilities. Various tradeoffs are discussed for filters from 50 MHz to 1 GHz and from 0.02% to 0.2% fractional 3 dB bandwidths. The lntermodulation suppression of SAW Resonator Filters is presented in a later section.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132950881","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1132015
A. Prata, E. Filho, S. Ghosh
A wide bandwidth diplexing feed system consisting of a pair of multihole corrugated directional couplers and a dual-depth corrugated horn, has been developed for satellite communication antenna applications. The feed has capacity to handle any arbitrary dual orthogonally polarized signals and to incorporate in dependent depolarization correction for these signals in the downlink and uplink. It shows a very good isolation between orthogonally polarized signals at each reused frequency over the recently allocated bands which extend from 3.4 to 4.2 GHz in the downlink and 5.85 to 6.775 GHz in the uplink for fixed satellite systems. Two modular devices which operate for high or low frequency beacon to extract difference modes for tracking purpose, are also described. Based on beacon allocation, the suitable module can be conveniently incorporated in the feed system without disturbing the electrical performances at the communication links.
{"title":"A High Performance - Wide Band - Diplexing - Tracking - Depolarization Correcting Satellite Communication Antenna Feed","authors":"A. Prata, E. Filho, S. Ghosh","doi":"10.1109/MWSYM.1985.1132015","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1132015","url":null,"abstract":"A wide bandwidth diplexing feed system consisting of a pair of multihole corrugated directional couplers and a dual-depth corrugated horn, has been developed for satellite communication antenna applications. The feed has capacity to handle any arbitrary dual orthogonally polarized signals and to incorporate in dependent depolarization correction for these signals in the downlink and uplink. It shows a very good isolation between orthogonally polarized signals at each reused frequency over the recently allocated bands which extend from 3.4 to 4.2 GHz in the downlink and 5.85 to 6.775 GHz in the uplink for fixed satellite systems. Two modular devices which operate for high or low frequency beacon to extract difference modes for tracking purpose, are also described. Based on beacon allocation, the suitable module can be conveniently incorporated in the feed system without disturbing the electrical performances at the communication links.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134313193","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1132034
T. Mochizuki, K. Honma, K. Handa, W. Akinaga, K. Ohata
Recently developed LNAs incorporating two dimensional electron gas (2 DEG) FETs for satellite communications earth stations are disclosed, which give epoch-making low noise as FET LNAs to operate. in the 2, 4, 12, and 20 GHz bands at room temperature, especially under cooled state. Typically detailed further is newly developed 4 GHz band LNA with 55 K max. noise temperature at room temperature, noise temperatures of the order of 30 K across 800 MHz bandwidth (3.4 to 4.2 GHz) under thermoelectrically (TE- ) cooled state (about-45°C), which has been adopted in the new earth station conducted by KDD.
{"title":"Low Noise Amplifiers Using Two Dimensional Electron Gas FETs","authors":"T. Mochizuki, K. Honma, K. Handa, W. Akinaga, K. Ohata","doi":"10.1109/MWSYM.1985.1132034","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1132034","url":null,"abstract":"Recently developed LNAs incorporating two dimensional electron gas (2 DEG) FETs for satellite communications earth stations are disclosed, which give epoch-making low noise as FET LNAs to operate. in the 2, 4, 12, and 20 GHz bands at room temperature, especially under cooled state. Typically detailed further is newly developed 4 GHz band LNA with 55 K max. noise temperature at room temperature, noise temperatures of the order of 30 K across 800 MHz bandwidth (3.4 to 4.2 GHz) under thermoelectrically (TE- ) cooled state (about-45°C), which has been adopted in the new earth station conducted by KDD.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"331 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133847324","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1132059
Pan Shenggen
A systematic and novel approach is developed for the dyadic operation of dyadic Green's functions (DGF). The complete forms of the dyadic operation of the DGF for cylindrical waveguides are given. Ambiguities associated with the dyadic operation in the literature are clarified and the errors are redressed.
{"title":"On the Question of the Dyadic Operation of Dyadic Green's Functions at the Source Region","authors":"Pan Shenggen","doi":"10.1109/MWSYM.1985.1132059","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1132059","url":null,"abstract":"A systematic and novel approach is developed for the dyadic operation of dyadic Green's functions (DGF). The complete forms of the dyadic operation of the DGF for cylindrical waveguides are given. Ambiguities associated with the dyadic operation in the literature are clarified and the errors are redressed.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133862011","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 : 1985-06-04DOI: 10.1109/MWSYM.1985.1131959
A. Pavio, M. Smith
A novel coupling method is employed in the design of a push-push broadband dielectric resonator oscillator for K- and Ka-band operation. The oscillators realized with this technique exhibit excellent spectral purity, power output, and suppression of spurious outputs.
{"title":"Push-Push Dielectric Resonator Oscillator","authors":"A. Pavio, M. Smith","doi":"10.1109/MWSYM.1985.1131959","DOIUrl":"https://doi.org/10.1109/MWSYM.1985.1131959","url":null,"abstract":"A novel coupling method is employed in the design of a push-push broadband dielectric resonator oscillator for K- and Ka-band operation. The oscillators realized with this technique exhibit excellent spectral purity, power output, and suppression of spurious outputs.","PeriodicalId":446741,"journal":{"name":"1985 IEEE MTT-S International Microwave Symposium Digest","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116359608","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：