Patent ID: 6625427
Filing Date: 2003-09-23
Classification: H01P,H03F,H03G,H03H,H04B

Abstract:
A radio transmission apparatus for performing radio transmission by use of carrier frequencies, comprising:signal processing systems, each including a signal generator configured to generate a signal having one of the carrier frequencies, an amplifier configured to amplify the signal generated from said signal generator, and a variable band-pass filter configured to receive an output signal from said amplifier and to pass the signal of said one of the carrier frequencies; a filter controller configured to control a pass band of each variable band-pass filter according to each respective signal having one of the carrier frequencies and generated by a respective signal generator; a combiner configured to combine signals output from said variable band-pass filters of said signal processing systems into a transmission signal; a fault detector configured to detect a fault of each variable band-pass filter; and a transmission controller configured to stop an operation of a signal processing system having said signal generator, said amplifier, and said variable band-pass filter in which the fault of said variable band-pass filter is detected by said fault detector.