{"title":"Fibre-optic illumination of GaAs MESFETs for use in phased-array antennas","authors":"L. A. Campos, E. E. Ames","doi":"10.1109/BAODS.1990.205512","DOIUrl":null,"url":null,"abstract":"Experimental and theoretical results are reported for fiber-optic links using MESFETs as light detectors for application in monolithic microwave integrated circuit (MMIC)-based phased-array antennas. Since MESFETs are compatible with MMICs, it is easy to implement a MESFET receiver in MMIC transmit-and-receive (T/R) modules. A receiver design using MESFET detection is less complicated and occupies less area than a PINFET receiver. The use of single-mode (SM) and multimode graded-index (MMGI) fiber to illuminate microwave devices is examined. The keys to this investigation are the high responsivity (R) values obtained by illuminating MESFETS with fibers (R/sub SM/=1.87 mA/mW; R/sub MMGI/=1.18 mA/mW) and the phase coherency demonstration of MESFET fiber-optic links at microwave frequencies using an antenna array and measuring its radiation pattern RF link loss improvements of 9 to 13 dB with respect to links using p-i-n photodiodes were measured.<<ETX>>","PeriodicalId":119716,"journal":{"name":"LEOS Summer Topical on Broadband Analog Optoelectronics: Devices and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1990-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"LEOS Summer Topical on Broadband Analog Optoelectronics: Devices and Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/BAODS.1990.205512","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Experimental and theoretical results are reported for fiber-optic links using MESFETs as light detectors for application in monolithic microwave integrated circuit (MMIC)-based phased-array antennas. Since MESFETs are compatible with MMICs, it is easy to implement a MESFET receiver in MMIC transmit-and-receive (T/R) modules. A receiver design using MESFET detection is less complicated and occupies less area than a PINFET receiver. The use of single-mode (SM) and multimode graded-index (MMGI) fiber to illuminate microwave devices is examined. The keys to this investigation are the high responsivity (R) values obtained by illuminating MESFETS with fibers (R/sub SM/=1.87 mA/mW; R/sub MMGI/=1.18 mA/mW) and the phase coherency demonstration of MESFET fiber-optic links at microwave frequencies using an antenna array and measuring its radiation pattern RF link loss improvements of 9 to 13 dB with respect to links using p-i-n photodiodes were measured.<>
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