| 摘要 |
An RF front-end apparatus in a TDD wireless communication system is provided. In the RF front-end apparatus, a detector is provided at a predetermined position in a signal path, and detects a signal propagating in the signal path. A circulator provides a signal received from a power amplifier to an antenna feed line and a signal received from the antenna feed line to a switch. A switch controller generates a control signal based on the signal received from the detector and a switch on/off signal received from a control board. The switch, which is disposed at an input port of an LNA, switches on/off according to the control signal received from the switch controller.
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