| 摘要 |
The invention relates to a system for fault detection for a radio transceiver 200. The apparatus comprises a circulator 211 connected between a transmitter power amplifier (209) and a transceiver output 213. A load port 219 of the circulator 211 is the output for a reflected signal from an antenna subsystem 213, 221, 223, 225 and is coupled to a receiver unit 231. The receiver unit 231 measures a load port parameter, preferably the power level, of the reflected signal on the load port 219. The fault detection system determines if a fault condition exists in response to the measured load port parameter. Specifically, a fault is determined to exist if the reflected power level is above a given threshold. The system is applicable to for example base stations for a cellular communication system. |
