D-Band 4-ch Antenna-on-Chip Phased-Array TX Front-End

In this paper, we report a D-band phased-array TX front-end with 4 antenna elements on chip implemented in a 22-nm SOI-CMOS process. The TX front-end consists of a wideband vector synthesis phase shifter, power amplifier and antenna. The phase shifter has a gain of −7dB and is a switching-based digitally controlled phase shifter with excellent phase control stability over temperature. The power amplifier delivers 8.5 dBm output P1dB and 23 dB gain at 150 GHz. The antenna is realized on the chip with a tapered slot and radiates towards the edge of the chip. A D-band phased-array module equipped with four of these is realized on a single chip.