A Q-band phased-array front-end with integrated Wilkinson couplers for linear power combining in SiGe BiCMOS

Author

Koh, Kwang-Jin ; Rebeiz, Gabriel M.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of California, San Diego, CA

fYear

2008

fDate

13-15 Oct. 2008

Firstpage

190

Lastpage

193

Abstract

A 4-element phased-array front-end receiver based on 4-bit RF phase shifters is designed for 36-46 GHz satellite communications. The phased-array uses a corporate-feed approach with integrated Wilkinson combiners for linear coherent power combining. The measured loss in the Wilkinson coupler is 0.5-0.6 dB at 30-50 GHz. The phased-array shows 10.4 dB of average power gain, les1.2 dB of RMS gain error, les8.7deg of RMS phase error and an IIP3 of -13.5 dBm per channel for all 4-bit phase states at 38.5 GHz. The chip consumes 118 mA from a 5 V supply voltage. The overall chip size is 1.4times1.7 mm² and includes all the digital control circuits (address decoders, registers, etc.) for the array.

Keywords

BiCMOS integrated circuits; Ge-Si alloys; elemental semiconductors; microwave phase shifters; power combiners; satellite communication; 4-bit RF phase shifters; BiCMOS; Q-band phased-array front-end; SiGe; integrated Wilkinson couplers; linear power combining; satellite communications; BiCMOS integrated circuits; Couplers; Gain; Germanium silicon alloys; Loss measurement; Phase shifters; Radio frequency; Satellite communication; Semiconductor device measurement; Silicon germanium; BiCMOS analog integrated circuit; SiGe BiCMOS; Wilkinson coupler; millimeter wave; phase shifter; phased array; radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Bipolar/BiCMOS Circuits and Technology Meeting, 2008. BCTM 2008. IEEE

Conference_Location

Monteray, CA

ISSN

1088-9299

Print_ISBN

978-1-4244-2725-3

Electronic_ISBN

1088-9299

Type

conf

DOI

10.1109/BIPOL.2008.4662741

Filename

4662741