本研究使用台積電CMOS 90nm 1P9M製程技術，設計並實作出用於相位陣列系統中的38.6-40 GHz 6位元開關型相移器。由於相位陣列系統可以通過波束成形網路來提高系統的訊號傳輸效率，因此近年來已在無線通訊系統中得到廣泛應用。波束成形網路是用於無線通訊系統中的一種有吸引力的技術。其中相移器是波束成形網路中必不可少的電路。
波束成形網路由多組天線路徑實現。每組天線路徑上的訊號都需要不同的相位移量來互相疊加並放大主方向上的訊號[5]。所需相位移量可以透過切換所提出的開關型相移器中各級相位移單元電路的操作模式來合成。在本研究中提出的開關型相移器以6組相位移單元所組成，分別提供5.625度、11.25度、22.5度、45度、90度及180度的相位移量。透過合成各級的相位移單元所提供的相位移量使相位變化範圍涵蓋360度。
本研究提出的相移器的測量結果以均方根相位誤差表示，量測結果的相位誤差在38.6-40 GHz中為7.84°±0.94°。對於所有64個狀態，由於狀態的不同，插入損耗範圍的測量結果在38.6-40 GHz下為16.01±0.25至32.85±0.23 dB，均方根增益誤差為3.65±0.01 dB。晶片尺寸為0.87 mm2。

A 38.6-40 GHz 6-bit switch-type phase shifter for phased array has been designed and fabricated using TSMC 90-nm CMOS 1P9M process. The phased array system has been widely applied in communication systems these years because of the signal transmission efficiency of the system can be enhanced by beamforming network. Beamforming network is an attractive technique for wireless communication system. Phase shifter is an indispensable element of the beamforming network.
Beamforming network is implemented by multiple antenna paths. Each antenna path required different phase to amplify signal in main direction [5]. The required phase can be synthesized through the proposed switch-type phase shifter by switching operated mode of the phase shifting stages.
Measurement results of the proposed phase shifter shown in root mean square phase error (rms phase error) is 7.84°±0.94° in 38.6-40 GHz. For all 64 states, measurement result of the range of insertion loss is 16.01±0.25 to 32.85±0.23 dB in 38.6-40 GHz because of the different states and root mean square gain error (rms gain error) is 3.65±0.01 dB in 38.6-40 GHz. The chip size is 0.87 mm2.

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