RF front-end apparatus for isolating TX and RX signal

摘要

The present invention relates to an RF front-end apparatus for separating transmitting and receiving signals and, specifically, to an RF front-end apparatus for separating TX and RX signals which maximizes call quality by minimizing leakage signal interference in a receiving signal, wherein the leakage signal is generated due to directional coupler usage when transmitting and receiving signals are separated in a system using Time Division Duplex (TDD). The disclosed RF front-end apparatus for separating transmitting and receiving signals is characterized by comprising: a coupling means (100) for separating a transmitting signal and a receiving signal by coupling inputted transmitting and receiving signals through respective coupling paths and coupling a signal leaked from the transmitting signal through a different path; an adjusting means for generating at least one offset signal by adjusting a coupled signal from the transmitting signal in order to correspond to the leaked signal; and a combining means (300) for offsetting a leakage signal by combining at least one leakage signal and at least one offset signal through at least one offset path. [Reference numerals] (10) Transmitting unit;(20) Receiving unit;(AA) Offset signal;(BB) Leakage signal