{"title":"200mhz带宽GaAs开关模式电源调制器","authors":"T. Soma, S. Hori, K. Kunihiro","doi":"10.1109/BCICTS.2018.8551132","DOIUrl":null,"url":null,"abstract":"We report a wide-bandwidth and high-efficiency supply modulator for an envelope tracking power amplifier. We fabricated a GaAs switching power amplifier monolithic microwave integrated circuit (MMIC), the switching frequency of which is 2 GHz, and measured its performance as a supply modulator. A delta-sigma modulation is used to generate digital input signals for the MMIC. To reduce the switching loss, we added an extra feed-back path to a conventional delta-sigma modulator from the output of the comparator to the input of the accumulator. The supply modulator shows a switching efficiency of 66% and an average output power of 30.5 dBm with a 200 MHz bandwidth orthogonal frequency division multiplexing (OFDM) envelope signal.","PeriodicalId":272808,"journal":{"name":"2018 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A 200 MHz Bandwidth GaAs Switch-Mode Supply Modulator\",\"authors\":\"T. Soma, S. Hori, K. Kunihiro\",\"doi\":\"10.1109/BCICTS.2018.8551132\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We report a wide-bandwidth and high-efficiency supply modulator for an envelope tracking power amplifier. We fabricated a GaAs switching power amplifier monolithic microwave integrated circuit (MMIC), the switching frequency of which is 2 GHz, and measured its performance as a supply modulator. A delta-sigma modulation is used to generate digital input signals for the MMIC. To reduce the switching loss, we added an extra feed-back path to a conventional delta-sigma modulator from the output of the comparator to the input of the accumulator. The supply modulator shows a switching efficiency of 66% and an average output power of 30.5 dBm with a 200 MHz bandwidth orthogonal frequency division multiplexing (OFDM) envelope signal.\",\"PeriodicalId\":272808,\"journal\":{\"name\":\"2018 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS)\",\"volume\":\"5 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2018-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2018 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/BCICTS.2018.8551132\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/BCICTS.2018.8551132","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A 200 MHz Bandwidth GaAs Switch-Mode Supply Modulator
We report a wide-bandwidth and high-efficiency supply modulator for an envelope tracking power amplifier. We fabricated a GaAs switching power amplifier monolithic microwave integrated circuit (MMIC), the switching frequency of which is 2 GHz, and measured its performance as a supply modulator. A delta-sigma modulation is used to generate digital input signals for the MMIC. To reduce the switching loss, we added an extra feed-back path to a conventional delta-sigma modulator from the output of the comparator to the input of the accumulator. The supply modulator shows a switching efficiency of 66% and an average output power of 30.5 dBm with a 200 MHz bandwidth orthogonal frequency division multiplexing (OFDM) envelope signal.
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