OMNIDIRECTIONAL ANTENNA WITH A NULL IN A SELECTED DIRECTION

摘要

An antenna arrangement 10 comprises an antenna array 12 comprising a first antenna 14 having a port 15 and a second antenna 16 spaced from the first antenna and having a port 17. A decoupler 18 is mounted between the first antenna 14 and the second antenna 16 on an imaginary line 20 extending between the first antenna and the second antenna. An exciter 22 is connected to the port 15 of the first antenna and to the port 17 of the second antenna. The exciter 22 is configured to drive the array 12 so that in a radiation pattern 26 associated with the array, there is at least a partial null 24 on the line 20.