Patent ID: 6437753
Filing Date: 2002-08-20
Classification: H01Q

Abstract:
A primary radiator comprising:a waveguide having a radio wave introducing aperture at one end thereof; and a dielectric feeder formed of a dielectric material held in an aperture end of the waveguide, wherein the dielectric feeder is provided with a converting portion for impedance-converting the radio wave from a mode of the waveguide to a mode of the dielectric material, a radiating portion showing a radiation pattern having a major axis and a minor axis in two directions with radiation angles orthogonal to each other where the radio wave in the mode of the dielectric material is radiated in the air, and a phase compensating portion for compensating a propagative phase difference produced between the major axis and the minor axis when the radio wave in the mode of the dielectric material is transmitted from the converting portion to the radiating portion.