WESTINGHOUSE ELECTRONIC SYSTEMS GROUP BALTIMORE MD
The E-3A antenna system employs electronic scanning in elevation in order to accomplish its mission. As part of a recent radar system performance upgrade effort, it was deemed necessary to change the elevation plane offset angle between the transmit and receive beams. The electronic elevation scanning function for the antenna is effected on both transmit and receive by a set of very accurate ferrite rotary field phase shifters and associated analog and digital control circuitry. The transmitreceive elevation beam offset function is effected by a set of non-linear ferrite phase shifters which are located in a part of the antenna R. E signal combining network which is dedicated to the receive function.
This article is from 'Proceedings of the Antenna Applications Symposium Held on 25-27 September 1991. Volume 1,' AD-A253 681, p81-96.