A vehicle 101 may have multiple directional antennas 102 mounted in an equal spaced distributed array around the vehicle (e.g. car, boat, aircraft, satellite), pointing away from the vehicle, maybe in an azimuth plane. In transmit and/or receive the directional antennas 102 operate only on a single polarisation and in phase, providing a combined omnidirectional radiation pattern 103. Polarisation may be linear, vertical, horizontal, slant, right or left hand circular polarisation. The directional antennas 102 may be planar inverted-F PIFA antennas housed in a radome, and equal-phase signals may be output or combined using a Wilkinson power divider. The antenna apparatus my mitigate interference or distortion of radiation by the vehicle 101 and reduce wasted signal energy.
Omnidirectional vehicle antenna appratus
2023-08-09
Patent
Electronic Resource
English