26.5∼29.5 GHz 6비트 스위치 필터형 위상천이기.

This paper presents a 6-bit phase shifter designed and fabricated using a 150-nm GaN HEMT process. The designed phase shifter operates in the n257 (26.5-29.5 GHz) band of the 5G NR standard, and the structure of a switched-filter phase shifter is used. The designed phase shifter connects six single-bit phase shifters in series from 180° to 5.625° to change the phase within the phase range of 360°. An LCL low-pass T-type filter is used to reduce the size of the filter element. The 180° phase shifter mixes low-pass and high-pass T-type filters. The fabricated phase shifter has an average insertion loss of 8.45 dB and an RMS phase error of less than 4.54° at 26.5-29.5 GHz. Herein, the phase shifter had a low insertion loss per bit and a small RMS phase error. [ABSTRACT FROM AUTHOR]