TIME DIVISION MULTIPLEX FDD/TDD DUAL MODE RADIO EQUIPMENT AND TIME DIVISION MULTIPLEX DUAL BAND RADIO EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To simplify the circuit configuration by designing circuits for each mode provided for transmission/reception purposes in common in the time division multiplex dual mode/dual band radio equipment. SOLUTION: In the case of receiving a frequency division duplex(FDD) signal, the signal is received from an antenna 1 through a path of a mode changeover switch 2, a transmission reception switch 3, a band pass filter 4, a high frequency amplifier 5, a converter 5 and a demodulation section 8, and in the case of receiving a time division duplex(TDD) signal, the signal is received from the antenna 1 through a path of the mode changeover switch 2, a a band pass filter 12, a matrix switch 9, a high frequency amplifier 13, a converter 14 and the demodulation section 8. In the case of transmission, the signal passes through a modulation signal generating section 15, a 2-frequency band pass filter 16, a broad band amplifier 17, and the matrix switch 9, and then the TDD signal is sent from the antenna 1 through a part of the band pass filter 12 and the mode changeover switch 2, and the FDD signal is sent from the antenna 1 through a path of a high frequency amplifier 10, a band pass filter 11, the transmission reception changeover switch 3 and the mode switch 2. Thus, the circuit configuration is designed in common.