Experimental Results of Interferer Suppression with a Compact Antenna Array

Abstract

Array antennas with digital beamforming provide a powerful method for interference suppression. In the project KOMPASSION a miniaturised 2x2 element array antenna with reduced element spacing and a surface, which is only one quarter of the surface of a conventional four element array antenna, was developed. Because of the lower element distance strong coupling effects appear which have to be taken into account. Different designs of the antenna were tested, among which one variant uses a decoupling and matching network (DMN). The project included also the development of a complete L1/E1- GNSS receiver for tracking and processing of the GNSS satellite signals. The performance of the receiver and the miniaturised antenna was investigated by field tests.