An Improved Wideband All-Pass I/Q Network for Millimeter-Wave Phase Shifters

Author

Kim, Sang Young ; Kang, Dong-Woo ; Koh, Kwang-Jin ; Rebeiz, Gabriel M.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of California at San Diego, La Jolla, CA, USA

Volume

60

Issue

11

fYear

2012

Firstpage

3431

Lastpage

3439

Abstract

This paper presents the design and analysis of an improved wideband in-phase/quadrature (I/Q) network and its implementation in a wideband phased-array front-end. It is found that the addition of two resistors (R_s) in the all-pass I/Q network results in improved amplitude and phase performance versus capacitance loading and frequency, which is essential for wideband millimeter-wave applications. A prototype 60-80-GHz phased-array front-end based on 0.13-μm SiGe BiCMOS is demonstrated using the improved quadrature all-pass filter and with 4-bit phase-shifting performance at 55-80 GHz. Application areas are in wideband millimeter-wave systems.

Keywords

BiCMOS integrated circuits; CMOS integrated circuits; Ge-Si alloys; all-pass filters; field effect MIMIC; millimetre wave phase shifters; resistors; BiCMOS process; SiGe; capacitance frequency; capacitance loading; frequency 55 GHz to 80 GHz; improved wideband all-pass I-Q network; improved wideband in-phase-quadrature network; millimeter-wave phase shifter; quadrature all-pass filter; resistor; size 0.13 mum; wideband millimeter-wave application; wideband phased-array front-end; word length 4 bit; Capacitance; Gain; Impedance; Loading; Millimeter wave technology; Vectors; Wideband; Active phase shifter; BiCMOS analog integrated circuit; beam-forming network; in-phase/quadrature (I/Q) network; phase shifter; phased array; quadrature network; smart antenna;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2012.2212027

Filename

6291764