| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a transmitter-receiver sharing antenna capable of increasing a reaching distance by sharing the antenna of a gain higher than scheduled at the beginning of the design of a transmitter-receiver without changing the design of the transmission-receiver under the limitation of EIRP(equivalent isotropic radiation power) or the like. SOLUTION: This antenna sharing transmitter-receiver 100 is provided with a transmission signal dedicated path 107 and a reception signal dedicated path 108. Transmission signals are transmitted through a route including the transmission signal dedicated path 107 through a circulator 132, inputted to an attenuator 104, attenuated and then inputted through the circulator 131 to a transmission/ reception shared antenna 101. In the meantime, reception signals are transmitted through the route including the reception signal dedicated path 108 through the circulator 131 and inputted through the circulator 132 to the transmitter- receiver 102. Since the attenuator 104 attenuates the transmission signals, even when the transmission/reception shared antenna 101 is a high gain, the transmission signals of a level for keeping the stipulated value of the EIRP are outputted.</p> |
