Accession Number : ADP007432

Title :   An Efficient, Low Cost Method of Modifying the E-3A Antenna Elevation Beam Offset Angle,

Corporate Author : WESTINGHOUSE ELECTRONIC SYSTEMS GROUP BALTIMORE MD

Personal Author(s) : Parrish, D. P. ; Hacker, P. S. ; Vogelsang, R. K. ; Stepanek, J. R. ; Ramsey, K. G.

Report Date : FEB 1992

Pagination or Media Count : 17

Abstract : 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 transmit/receive 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.

Descriptors :   *ANTENNAS, *ELECTRONICS, *RADAR, ANALOGS, ANGLES, CONTROL, ELEVATION, FERRITES, FUNCTIONS, MISSIONS, NETWORKS, PHASE, SCANNING, SIGNALS.

Subject Categories : Electrical and Electronic Equipment
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE