| 摘要 |
PURPOSE:To make a titled antenna thin, and also to make it compact by providing concentrically plural hoop antennas having different diameters, so as to be opposed to an earth plate, covering them with a dielectric dome, and also fetching separately a feeder from each antenna. CONSTITUTION:Hoop antennas 2-4 are provided concentrically so as to be opposed to a plate-like earth plate 1. The antenna 2 of the largest diameter, the antenna 3 and the antenna 4 are used for FM of 70-100MHz, TV of a VHF band, and TV of a UHF band, respectively. Also, feeding cables 5-7 are provided separately against the antennas 2-4, and the whole body is covered with a dielectric dome 8. Accordingly, a multi-channel antenna which is low in the ground height, thin and compact can be constituted, therefore, it can be made suitable for an on-vehicle use. |
