POLARIZED WAVE SWITCHING AND DIRECTIONALITY-VARIABLE ANTENNA

摘要

A polarized wave switching and directionality-variable antenna is provided with a dielectric substrate (11), a radiation conductive plate (12) formed on a front surface of the dielectric substrate, and a grounded conductive plate (14) formed on a back surface of the dielectric substrate. At least one directionality switching element and at least two polarized wave switching elements are provided in the grounded conductive plate (14). The directionality switching element has a first slot defined by cutting off the grounded conductive plate (14) in a loop shape and at least two directionality switches (22a-22d). The polarized wave switching element has a first slot defined by cutting off the grounded conductive plate (14) in a loop shape and at least one of the polarized wave switches (23a-23d). Control of the directionality switches (22a-22d) can achieve switching the maximum gain direction of the directionality of the antenna while that of the polarized wave switches (23a-23d) can achieve switching rotational directions of a circular polarized wave emitted from the antenna.