A 60-GHz CMOS 16-beam beamformer for two-dimensional array antennas

Author

Wei-Yang Chen ; Ming-Huei Huang ; Pei-Yu Lyu ; Sheng-Fuh Chang ; Chia-Chan Chang

Author_Institution

Dept. of Electr. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan

fYear

2014

fDate

1-6 June 2014

Firstpage

1

Lastpage

3

Abstract

A 60-GHz CMOS beamformer for sixteen conical-beam generation in both azimuth and elevation dimensions from planar array antennas is presented. The conventional 4-way Butler matrix allows four beams generated only in one dimension. For two-dimensional generation, two stacks of 4-way Butler matrix are composed to generate 16 beams in azimuth and elevation dimensions. The 16-beam beamformer was implemented in 0.18-μm CMOS technology, where the chip size is 2×2 mm². The progressive phase error between adjacent output ports is 17.6° at 60 GHz, which will result in 3° main-beam direction error. The insertion loss of one path is 4.7 dB. The overall array gain is 6.5 to 8.4dB.

Keywords

array signal processing; millimetre wave antenna arrays; planar antenna arrays; 4-way Butler matrix; CMOS 16-beam beamformer; azimuth dimensions; conical-beam generation; elevation dimensions; planar array antennas; progressive phase error; two-dimensional array antennas; two-dimensional generation; Abstracts; Antennas; CMOS integrated circuits; Switches; 2-D beamformer; Butler matrix; CMOS phased array;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium (IMS), 2014 IEEE MTT-S International

Conference_Location

Tampa, FL

Type

conf

DOI

10.1109/MWSYM.2014.6848453

Filename

6848453