A RF TRANSMITTRER AND RECEIVER IN LMCS

摘要

PURPOSE: An RF transmitter and receiver in LMCS(Local Multipoint Communication System) is provided to reduce a design area by implementing an RF transmitter/receiver as one module, and to implement an RF terminal for stably performing intermediate frequency conversion of a high frequency band(26GHz). CONSTITUTION: An RF transmitter and receiver in LMCS includes the following units. A duplexer(10) separates transmission and receiving of a signal inputted through a transceive antenna. The first frequency downward conversion unit(20) receives a signal through the duplexer(10) and converts the same into an intermediate frequency band. The second frequency downward conversion unit(40) converts an intermediate frequency converted through the first frequency downward conversion unit(20) into a signal waveform suitable for a transmission channel. A quadruple frequency multiplier(60) provides a local oscillation frequency outputted from a local oscillator to the second frequency downward conversion unit(40).