{"title":"A 60-GHz CMOS Broadband Heterodyne I/Q Up-Converter with Suppressed LOFeedthrough and Image Leakages","authors":"Kyung Pil Jung, Seung Hun Kim, Chulwoo Park","doi":"10.1109/SiRF56960.2023.10046217","DOIUrl":null,"url":null,"abstract":"This study developed a 60-GHz CMOS heterodyne I/Q up-converter with local oscillator feedthrough (LOFT) suppression and I/Q calibration in 65-nm process. The compact onchip passive I/Q calibration circuits are proposed to suppress image leakage while requiring no additional power consumption. By using varactors and attenuators, the phase and gain difference of up to 20° and 1.5 dB can be calibrated in I/Q mixers, respectively. The proposed I/Q up-converter delivered a peak conversion gain of 4.2 dB across 55-6S.5 GHz for 3-dB bandwidth. With the proposed calibration, the measured LOFT suppression and IRR are 54 and 44 dB respectively, improved by 23.5 and 12 dB compared to without calibration, respectively.","PeriodicalId":354948,"journal":{"name":"2023 IEEE 23rd Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems","volume":"101 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2023 IEEE 23rd Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SiRF56960.2023.10046217","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
This study developed a 60-GHz CMOS heterodyne I/Q up-converter with local oscillator feedthrough (LOFT) suppression and I/Q calibration in 65-nm process. The compact onchip passive I/Q calibration circuits are proposed to suppress image leakage while requiring no additional power consumption. By using varactors and attenuators, the phase and gain difference of up to 20° and 1.5 dB can be calibrated in I/Q mixers, respectively. The proposed I/Q up-converter delivered a peak conversion gain of 4.2 dB across 55-6S.5 GHz for 3-dB bandwidth. With the proposed calibration, the measured LOFT suppression and IRR are 54 and 44 dB respectively, improved by 23.5 and 12 dB compared to without calibration, respectively.
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