Title :
An 8
8 Butler Matrix in 0.13-
CMOS for 5–6-GHz Multibeam Applica
Author :
Cetinoneri, Berke ; Atesal, Yusuf A. ; Rebeiz, Gabriel M.
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of California at San Diego, La Jolla, CA, USA
Abstract :
This paper presents a miniature 5-6-GHz 8 × 8 Butler matrix in a 0.13-μm CMOS implementation. The 8 × 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 × 1.9 mm2 including all pads. The 8 × 8 matrix is mounted on a Teflon board with eight antennas, and the measured patterns agree well with theory and show an isolation of >; 12 dB at 5-6 GHz. CMOS Butler matrices offer a simple and low-power alternative to replace eight-element phased-array systems for high gain transceivers. The applications areas are in high data-rate communications at 5-6 and at 57-66 GHz. They can also be excellent candidates for multiple-input-multiple-output systems.
Keywords :
CMOS integrated circuits; MIMO systems; antenna phased arrays; field effect MMIC; radio transceivers; Butler matrix; CMOS implementation; MMIC; Teflon board; frequency 5 GHz to 6 GHz; frequency 57 GHz to 66 GHz; high gain transceivers; insertion loss; loss 3.5 dB; multiple-input-multiple-output systems; phased-array systems; size 0.13 mum; Butler matrix beam-former; multiple-input–multiple-output (MIMO) applications; switching beam antenna;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2010.2097751