A New Vor-Antenna in Slot-Technology

The general necessity for an improved VOR-antenna is outlined and the related specifications are summarized. The development and the design of a new VOR-antenna is described. The basic theory and the resulting radiating elements are discussed and the hardware resulting, an array of staggered loop antennas and interlaced double slot radiators, is outlined. Specific details are presented. The achieved results and the measuring technique are described. A vertical cross-polar-field-suppression of more than 20 dB and a bearing error < ± 1° have been .achieved up to 60°-elevation without the need for a polarisation cage. The cone of silence is reduced to ± 30°.