RF front-end apparatus for isolating TX and RX signal

摘要

The present invention relates to an RF front-end device for isolating transmission and reception signals, which maximizes communication quality by minimizing interference of a leakage signal caused by a transmission signal, in an reception signal, when performing reception/transmission signal isolation in a communication system using time division duplex (TDD) protocols. The RF front-end device of the present invention is characterized by comprising: an isolation unit (100) which isolates a transmission signal transmitted from a transmission side from a reception signal inputted from an antenna and generates a leakage signal of the transmission signal according to the signal isolation; an adjustment unit (200) which generates a cancelation signal by adjusting a signal coupled with the transmission signal to correspond to the leakage signal; and a coupling unit (300) which generates a coupling signal by coupling with the transmission signal and cancels out the leakage signal by the cancelation signal through coupling. [Reference numerals] (10) Transmission unit;(20) Reception unit