| 摘要 |
A first dipole antenna consisting of dipole antennae 2a, 2b and a second dipole antenna consisting of dipole antennae 2c, 2d are disposed so as to be approximately orthogonal at approximately lambd/4 intervals on a reflecting plate 6 having a diameter of approximately lambd/2 or more. By disposing a plurality of non-feeding elements 3a to 3h around the first dipole antenna and second dipole antenna and isolating them by approximately lambd/4, the transmission gain and axial ratio in a low elevation angle can be improved. |
