| 摘要 |
PURPOSE:To reduce adverse influence due to electromagnetic wave exposure from a portable radio terminal upon a human body by converting an ultrasonic wave outputted from radio terminal into an electric signal, amplifying the electric wave and sending a radio wave from a radio wave transmitter. CONSTITUTION:A fine electromagnetic wave sent from a base station or another terminal and free from electromagnetic wave exposure is transmitted and received to a BB-IF-RF module 1 through the 1st antenna 5, a branching filter 4 and a low noise amplifier 3. A high frequency signal outputted and transmitted from the module 1 is outputted from the 1st antenna 5 through the filter 4 as an electromagnetic wave with intensity free from electromagnetic wave exposure. The outputted electromagnetic wave is picked up by the 2nd antenna 8 and temporarily stored in a high frequency signal storing device 6 as a signal through a high output bidirectional amplifier 17 and an electromagnetic wave having intensity sufficiently enough for signal transmission to the base station or another terminal is discharged from the amplifier 17 to free space through the 2nd antenna 8. |
