| 摘要 |
PURPOSE: An apparatus for diagnosing a transmission reception antenna is provided to prevent the block size of the apparatus from being increased, by using a certain frequency instead of a transmission reception frequency. CONSTITUTION: A plurality of TXFUs(300,310,320) receives signals from an RFTU(400). The signals from the RFTU(400) are applied to transmission antennas(200,210,220) via ports(PORT1A, PORT1B, PORT1C) of the TXFUs(300,310,320). The output signals of the TXFUs(300,310,320) are fed back to the RFTU(400) via ports(PORT2A,PORT2B,PORT2C) of the transmission antennas(200,210,220). The RFTU(400) compares the signals applied to the ports(PORT1A,PORT1B,PORT1C) with the feedback signals from the ports(PORT2A,PORT2B,PORT2C), and thereby diagnoses the transmission antennas(200,210,220).
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