패키지된 KU-밴드용 5-비트 위상변위기 설계 및 제작

Design and Implementation of a Ku-band Packaged 5-bit Phase Shiner

This paper introduces the design and implementation of a Ku-band 5-bit monolithic phase shifter with a ceramic package. The 5-bit phase shifter MMIC was designed and fabricated by using GaAs MESFET switches. The packaged phase shifter demonstrates a phase error less than 11.3 $^{\circ}$ RMS and an insertion loss variation less than 1.0㏈ RMS for 13∼15㎓. For all 32 states, an insertion loss is measured to be 12.2${\pm}$2.2㏈, an input return loss more than 5.0㏈, and an output return loss more than 6.2㏈ from 13㎓ to 15㎓. The chip size of the 5-bit phase shifter MMIC is 2.35${\times}$1.65mm$\^$2/ including digital control circuits. The size of the ceramic packaged phase shifter is 7.2${\times}$6.2mm$\^$2/.