Title :
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
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 (Rs) 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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2012.2212027
