P. Abernathy, J. Dobrzanski, M.C. Smith, M. Griswold, M. Burnsed, J. Sherman
{"title":"卫星后续用ku波段固态功率放大器","authors":"P. Abernathy, J. Dobrzanski, M.C. Smith, M. Griswold, M. Burnsed, J. Sherman","doi":"10.1109/SECON.1996.510073","DOIUrl":null,"url":null,"abstract":"A compact 7 W (peak) Ku-band solid state power amplifier (SSPA) has been designed and developed for the Navy's Geosat follow-on (GFO) radar altimeter. This amplifier combines the output of two 5 W internally matched MESFETs with an integral waveguide combiner, and uses an external isofilter to protect the SSPA from load variations and to suppress 2nd and 3rd harmonics to -60 dBc. Drain voltage switching was implemented using a novel modulator design. An automatic levelling control (ALC) circuit maintains constant output power at end of life (EOL) over varying input and environmental conditions. AM/PM conversion was measured at 4.4 degrees peak/dB and the phase linearity was measured at 12.0 degrees p-p. A discussion is included on various growth options and new devices applicable for the future in remote sensing applications such as SeaWinds II, NPOESS, and GFO2.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"81 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Ku-band solid state power amplifier for Geosat follow-on\",\"authors\":\"P. Abernathy, J. Dobrzanski, M.C. Smith, M. Griswold, M. Burnsed, J. Sherman\",\"doi\":\"10.1109/SECON.1996.510073\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A compact 7 W (peak) Ku-band solid state power amplifier (SSPA) has been designed and developed for the Navy's Geosat follow-on (GFO) radar altimeter. This amplifier combines the output of two 5 W internally matched MESFETs with an integral waveguide combiner, and uses an external isofilter to protect the SSPA from load variations and to suppress 2nd and 3rd harmonics to -60 dBc. Drain voltage switching was implemented using a novel modulator design. An automatic levelling control (ALC) circuit maintains constant output power at end of life (EOL) over varying input and environmental conditions. AM/PM conversion was measured at 4.4 degrees peak/dB and the phase linearity was measured at 12.0 degrees p-p. A discussion is included on various growth options and new devices applicable for the future in remote sensing applications such as SeaWinds II, NPOESS, and GFO2.\",\"PeriodicalId\":338029,\"journal\":{\"name\":\"Proceedings of SOUTHEASTCON '96\",\"volume\":\"81 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1996-04-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of SOUTHEASTCON '96\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/SECON.1996.510073\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of SOUTHEASTCON '96","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SECON.1996.510073","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Ku-band solid state power amplifier for Geosat follow-on
A compact 7 W (peak) Ku-band solid state power amplifier (SSPA) has been designed and developed for the Navy's Geosat follow-on (GFO) radar altimeter. This amplifier combines the output of two 5 W internally matched MESFETs with an integral waveguide combiner, and uses an external isofilter to protect the SSPA from load variations and to suppress 2nd and 3rd harmonics to -60 dBc. Drain voltage switching was implemented using a novel modulator design. An automatic levelling control (ALC) circuit maintains constant output power at end of life (EOL) over varying input and environmental conditions. AM/PM conversion was measured at 4.4 degrees peak/dB and the phase linearity was measured at 12.0 degrees p-p. A discussion is included on various growth options and new devices applicable for the future in remote sensing applications such as SeaWinds II, NPOESS, and GFO2.
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