Title :
A V-Band 8
8 CMOS Butler Matrix MMIC
Author :
Chin, Ting-Yueh ; Wu, Jen-Chieh ; Chang, Sheng-Fuh ; Chang, Chia-Chan
Author_Institution :
Dept. of Electr. Eng., Nat. Chung Cheng Univ., Taichung, Taiwan
Abstract :
This paper presents a fully integrated V-band 8 x 8 Butler matrix in 0.13-μm CMOS technology. Since the number of building blocks exponentially increases with the order of the Butler matrix, the constituted components, including quadrature hybrids, phase shifters, and crossovers, must be redesigned for single-chip implementation in silicon. Design equations and novel layout arrangements are described. A demonstrated 8 x 8 Butler matrix was implemented, which has the compact chip size of 1.45 x 0.93 mm2, no dc power consumption, and low average loss of 3.1 dB. Eight spatial beams with the averaged 5.9 dBi gain and 0.6° main-beam direction tolerance were obtained in 56 to 66 GHz.
Keywords :
CMOS integrated circuits; elemental semiconductors; field effect MIMIC; millimetre wave phase shifters; silicon; Si; V-band CMOS Butler matrix MMIC; compact chip size; frequency 56 GHz to 66 GHz; phase shifters; quadrature hybrids; silicon; single-chip implementation; Arrays; Butler matrix; CMOS integrated circuits; CMOS technology; Couplings; Layout; MMICs; Antenna array; Butler matrix; CMOS; beamforming; broadside coupler; quadrature hybrid;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2010.2086372