POLYHEDRAL TRANSMITTING ANTENNA DEVICE

PROBLEM TO BE SOLVED: To provide a polyhedral transmitting antenna device which can get omnidirectional horizontal orientation emission pattern within wide range of frequency bands (the number of frequency allocation is large) on a space for antenna setting on the upper part of a large radio tower. SOLUTION: Toward adhibition frequency's wavelength λ, on the circumference (for example, on the outer circumferential face of the circular ring formed antenna support base 5 the center O of which stays the same position as the axis line of the radio tower 2) of a radius of r=nλ, (herein (n) is a constant number for keeping a wished feature toward a certain frequency band), 88 pieces of antenna unit 6 is set equally spaced along the circumference direction and antenna panel active area is set outward-looking from the center O. COPYRIGHT: (C)2003,JPO