Dynamic Polarization Control of Two-Dimensional Integrated Phased Arrays
Simultaneous two-dimensional (2-D) beam steering and dynamic polarization control (DPC) of the radiated electric field in 2-D phased arrays ensure polarization matching between the transmitter and receiver antennas in both fixed and mobile wireless systems. Polarization matching is maintained regardless of the polarization, orientation, and location of the receiver antenna in space within the 2-D steering range of the transmitter. This work implements a fully integrated 2 × 2 DPC phased-array transmitter in a 32-nm CMOS silicon-on-insulator process, radiating at 122.9 GHz. It achieves a maximum effective isotropic radiated power of +12.3 dBm in the broadside direction and enables polarization angle control of the radiated linear and elliptical polarizations across the full range of 0 ° to 180 ° with tunable axial ratio down to 1.2 dB to achieve circular polarization and the ability to steer the radiated beam up to 15 ° in both dimensions.
© 2016 IEEE. Manuscript received August 10, 2015; revised December 10, 2015; accepted February 05, 2016. Date of publication March 01, 2016; date of current version April 01, 2016. This paper is an expanded version from the IEEE RFIC Symposium, Phoenix, AZ, USA, May 17–19, 2015. The authors would like to thank A. Pai, California Institute of Technology, and B. Parker, formerly with IBM, for technical assistance, and S. Raman, formerly with the Defense Advanced Research Projects Agency (DARPA), T. Quach, Air Force Research Laboratory (AFRL), and D. Friedman, IBM, for support.