PLANAR CIRCULAR POLARIZATION WAVEGUIDE SLOT AND ARRAY ANTENNAS, AND PLANAR WAVEGUIDE SLOT AND ARRAY ANTENNAS

摘要

PROBLEM TO BE SOLVED: To provide planar circular polarization waveguide slot and array antennas that can stably radiate circular polarization waves by standing wave excitation. SOLUTION: An antenna 10 composes a planar waveguide array antenna by a plurality of waveguides 3 for radiation having a plurality of slot elements 5 and a waveguide 2 for feeding power that becomes a feeding means to the waveguides 3 for radiation. The slot element 5 is composed of a pair of slots 6 and 7 that are positioned in an L or inverse L shape and has different length's. One of the slots is along a tube axial on the wide wall surface of the waveguide 3 for radiation, and at the same time the L-shaped and inverse-L-shaped slot elements are alternately arranged along the tube axial of the waveguide 3 for radiation.