Patent ID: 6677910
Filing Date: 2004-01-13
Classification: H01P

Abstract:
A primary radiator comprising:a waveguide to transmit a vertically polarized wave and a horizontally polarized wave which are orthogonal to each other; a circuit board disposed in the waveguide so as to be orthogonal to an axis of the waveguide; a fine radiation pattern formed in an electrically independent manner on the circuit board and in the vicinity of the axis of the waveguide; and a first probe and a second probe formed on the same surface of the circuit board as that on which the fine radiation pattern is formed and extending from an inner wall of the waveguide toward the fine radiation pattern, wherein the first probe and the second probe are substantially orthogonal to each other, and the fine radiation pattern is electrically slanted at about 45 degrees relative to each of axes of the first probe and the second probe.