RADAR ANTENNA SYSTEMS

摘要

The present invention relates to a doppler navigational radar antenna with automatic land-sea correction utilizing the production of two somewhat differently inclined mutually overlapping labe groups each having four lobes. The antenna comprises a plane radiation array group having individual radiators disposed in parallel rows. Each radiator having two ends which have respective feed points. Each radiator is either actually fed or fed by way of radiation at the feed points by a first pair of feed lines extending transverse to the rows of radiators and coupled thereto at the respective feed points at one end thereof and a second pair of feed lines extending transverse to the rows of radiators and coupled thereto at respective feed points at the other end thereof. One feed line of each pair has a different phase delay than the other feed line of the same pair. The different phase delay is set correspondingly small so as to obtain the overlapping of the lobe groups.