| 摘要 |
PURPOSE:To simplify a four-element device by transmitting a control signal, transmission or reception signal and tuning tracking control signal to a directivity rotation mechanism without any mutual influence via one coaxial cable that connects the antenna part of the device to a transmitter or receiver. CONSTITUTION:Dipole antennas 31 and 32, and 33 and 34 that use voltage control or current control variable reactance elements are combined together by being connected to signal composite devices 35 and 37 via feeders 36a and 36b, and 38a and 38b. Those antennas 31 and 32, and 33 and 34 are connected to tuning control method 41 via switching control method 43, exercising variable control over a tuning circuit and according to signals from control signal sources 42a-42c, antenna 31-34 are combined variously. The outputs of said devices 35 and 37 are connected to signal composite device 39 via switching control method 44 to control the connection relation between devices 35 and 37. To the directivity rotation mechanism, a transmission or reception signal, control signals and tuning tracking signals are sent without any mutual influence. |
