[摘要]:This paper presents a miniature 5-6-GHz 8 x 8 Butler matrix in a 0.13-mu m CMOS implementation. The 8 x 8 design results in an insertion loss of 3.5 dB at 5.5 GHz with a bandwidth of 5-6 GHz and no power consumption. The chip area is 2.5 x 1.9 mm(2) inclu