ANTENNA EQUIPMENT

PROBLEM TO BE SOLVED: To provide antenna equipment which is compact and has wide band performance by making a special matching circuit unnecessary. SOLUTION: The antenna equipment is provided with: a parallel plate 1 comprising first and second conductive plates 1a and 1b; and a one-side shaped tapered conductive plate 2 which is between the parallel plate 1 and forms a taper slot line on the plane surface orthogonal to the parallel plate 1. The tapered conductive plate 2 expands in almost the parallel direction to the parallel plate 1 and one side on the side which is not tapered in an expansion direction end part of the tapered conductive plate 2 is short circuited to the first conductive plate 1a. One side on the side which changes into a tapered shape in the extension direction end part of the tapered conductive plate 2 is not short circuited to the second conductive plate 1b but, on the wider side of the tapered conductive plate 2, power is supplied to the second conductive plate 1b and the tapered conductive plate 2 on the opposite phase to each other. COPYRIGHT: (C)2008,JPO&INPIT