A C-band transmit-receive module for an active aperture radar is provided employing gallium arsenide chips preferably manufactured by the Multifunction Self-Aligned Gate process and employing both open and closed loop error correction for both phase and amplitude to correct for errors due to temperature,...http://www.google.com.au/patents/US5093667?utm_source=gb-gplus-sharePatent US5093667 - T/R module with error correction
