| 摘要 |
PURPOSE:To ensure the reception sensitivity featuring a constant high level in each direction by distributing plural units of directional antennas on nearly the same level and at the positions where the directive angles of the antennas feature about the same value in the radial direction and then compounding the output of each antenna to lead the compound output to the receiver. CONSTITUTION:Cylindrical support pipe 3 is attached to upright columnar pole 1, and antenna attachment pipes 5 are provided to pipe 3 equidistantly and in a radial formation. Then basement end part 5a protruded from pipe 3 in the diameter direction plus antenna attachment part 5b bent upward from part 5a are provided to each pipe 5, and directional antenna 6 is attached to part 5b respectively. In this case, antennas 6 are put on nearly the same level and at the positions where the directive angles of the antennas differ in about the same angle to each other and in the radial formation. Then the output of antennas 6 are compounded by compounding unit 8, thus securing the reception of the signals of a high constant level for receiver 9. |
