FREQUENCY SHARING NONDIRECTIONAL ANTENNA AND ARRAY ANTENNA

摘要

PROBLEM TO BE SOLVED: To provide a frequency sharing nondirectional antenna which can obtain a directional characteristic closer to a circle as a directional characteristic within a level surface for the earth. SOLUTION: A frequency sharing nondirectional antenna is provided with a cylindrical reflector, n and more antenna elements arranged on the circumference of a circle having a center on the midpoint of the cylindrical reflector when n is supposed to be equal to or more than 3, and an n distribution means distributing an excitation power supplied through a feeding line to be supplied to each antenna element. Each antenna element has a half-wave dipole antenna element emitting radio of a low-frequency, and a non-feeding element emitting radio of a high-frequency, and the feeding line is arranged within the cylindrical reflector. COPYRIGHT: (C)2005,JPO&NCIPI