| 摘要 |
PURPOSE:To always turn for the antenna toward the best directional direction by attaching the rotary part to the antenna and then providing both the circuit which gives the control to the rotational angle of the rotary part and the memory circuit which memorized the rotational angle. CONSTITUTION:Antenna element 12 is formed on the single surface or round dielectric substrate 13, and the rotary part is attached at the center part of the substrate. The rotary part is connected to memory circuit 19 via rotation control part 15 and then stored into box 11, along with switches 17 connected to memory circuit 19 plus preset knobs 16 provided on the surface of the box each. In case the antenna is installed, the first channel is received to drive the controll part, and the rotational angle signal is memorized in the memory circuit via knob 16 from the reference angle of the rotary part when the best direction is obtained by turning the antenna. The same operation is given to each channel. When one of the switches is turned on, the signal memorized is put into the control part. And the rotary part is turned until the best corresponding angle. |
