本論文研製毫米波CMOS低相位變化之可變增益放大器及類循環器射頻晶片，採用TSMC CMOS 0.18 um或90-nm製程。24-GHz低相位變化之可變增益放大器，改變疊接放大器之閘極偏壓達增益控制，並於後端串接一疊接放大器達相位平坦；60-GHz低相位變化之可變增益低雜訊放大器程，使用curreent steering技術達增益控制，並適當選擇電晶體尺寸達相位平坦；V-band類循環器，以三個quadruature hybrid使發射端到天線端為相位合成，發射端到接收端為相位消除達高隔離度；K-band類循環器，運用平衡器及耦合器產生之相位消除技術，使發射端洩漏到接收端的訊號相消以達高隔離度；整合於24-GHz CMOS人體呼吸心跳訊號感測射頻晶片之類循環器，運用高隔離度寬邊帶耦合器達單天線同時收發功能；整合於60-GHz非接觸式人體呼吸心跳訊號感測射頻晶片之類循環器與可變增益放大器，分別對靜態雜訊消除電路及收發射頻前端電路作驗證。電路設計部分使用Agilent ADS與Ansoft 3-D全波電磁模擬軟體HFSS進行模擬，量測部份皆採用on-wafer方式。依據不同的量測特性參數，相關的量測方法與設置亦有所調整。

This thesis presents the research on millimeter-wave (MMW) CMOS low-phase-variation variable gain amplifiers (VGA) and quasi-circulators, fabricated in standard TSMC 90-nm or 0.18-μm CMOS technologies. Agilent Advanced Design System (ADS) and Ansoft HFSS EM simulator are used for design simulation. The 24-GHz CMOS low-phase-variation VGA using the cascade amplifier method achieves low phase variation in a variable gain mode. The 60-GHz CMOS low-phase-variation variable-gain low noise amplifier (VG-LNA) is based on current steering technique to achieve low phase variation. Moreover, the VGLNA is intergrated with full-360° phase shifter for the phase-array receiver application. The V-band quasi-circulator using the phase combination and cancellation techniques achieves a high isolation. The K-band quasi-circulator based on phase cancellation technique consists of a balun and two couplers. Futhermore, to achieve both low insertion loss and high isolation, the quasi-circulator integrated in 24-GHz CMOS human vital-signs Doppler sensor is implemented by a high isolation borad-side coupler. The 60-GHz low-phase-variation VGA and quasi-circulator are also integrated in the design of the clutter cancellelling subsystem and RF front-end of a 60-GHz CMOS mm-wave life-detection system (MLDS). The measured performances of the designed MMW CMOS RFICs are all performed by using the on-wafer measurement setup.

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