A 2-15 GHz built-in-self-test system for wide-band phased arrays using self-correcting 8-state I/Q mixers
Tumay Kanar, Gabriel M. Rebeiz · 2016
A built-in-self-test (BIST) system for wide-band phase arrays channels is presented. The BIST is implemented using an on-chip I/Q receiver with an integrated ring-oscillator that provides both the channel test signal and the mixer local oscillator (LO). The BIST achieves wide-band accuracy for relative phase and gain measurements at 2-15 GHz using a one-time self-correction algorithm with 8 LO phases. The BIST measurements agree well with the VNA S-parameter data over a wide frequency range. To our knowledge, this is the first implementation of high accuracy wide-band BIST system for phased-array channels.