| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless communication system that can comply with Article 49-20 of a wireless facility regulation stipulating that absolute gain of transmission antennas shall be no bigger than 2.14 dB.SOLUTION: Each communication terminal has four antennas 2A, 2B, 2C and 2D disposed in the communication terminal for wireless communication, a changeover section 3 for allocating the antenna 2A for transmission and also allocating all the antennas for reception, and a control section 4 for controlling the changeover section. The changeover section comprises: a compositor near an end terminal connected to the antennas 2A and 2B; an a compositor near the end terminal connected to the antennas 2C and 2D; a compositor inside a device 35 connected to the compositor near the end terminal 33a and the compositor near the end terminal 33b; a transmission/reception changeover switch 37 near the end terminal connected between the antenna 2B and the compositor near the end terminal 33a; and a transmission/reception changeover switch 37b inside the device connected between the compositor near the end terminal 33b and the compositor inside the device 35. |
