A Twin Line Omni-Directional Aerial Configuration

Omni-directional aerials are required extensively for a variety of microwave systems such as in aircraft distance measuring equipment, side-lobe suppression of aerials for radar and radar transponders. The omni-directional aerial described in this paper provides extremely constant azimuth coverage with E vertical polarisation and can be manufactured cheaply from a single printed circuit panel. It can be designed to meet a wide range of elevation beamwidth and pointing angle requirements with high efficiency.