| 摘要 |
PURPOSE:To continuously relay by the use of the same frequency and one antenna by generating a canceller signal corresponding to a transmission wave component mixed in a received wave based on a transmission wave, and generating the transmission wave while eliminating the communication wave component. CONSTITUTION:When a received wave from a transmission station is received by a nondirectivity antenna 1, a directional coupler 2 inputs the received signal to a canceller circuit 5. The canceller circuit 5 outputs the inputted received wave signal as it is, fed to a transmitter 7 via a distributer 6 and amplified and becomes a transmission wave and sent from the nondirectional antenna 1 via the distributer 8 and the directional coupler 2. Moreover, the transmission wave is inputted to a canceller signal generating section 4 via the distributers 6, 8, the canceller signal with the opposite phase and same amplifier is generated with respect to the phase of the transmission wave corresponding to the phase and amplitude, that is, opposite to the phase of the transmission wave introducing crosstalk in the received wave and the signal is supplied to the canceller circuit 5 of the transmission wave generating section 3. Thus, the signal is relayed continuously in the same frequency without abnormal oscillation with one antenna. |
