Low-insertion-loss radio frequency switch circuit

The invention discloses a low-insertion-loss radio frequency switch circuit, which belongs to the technical field of radio frequency switches and integrated circuits and comprises an ANT antenna end blocking matching network, a TX transmitting end blocking matching network, an RX receiving end blocking matching network, an ANT antenna port, a TX transmitting port and an RX receiving port. The TX branch realizes channel connection and disconnection through a TX branch switch tube network, and the RX branch realizes channel connection and disconnection through an RX series inductance network, an RX branch switch tube network and an RX parallel blocking network. According to the invention, the single-pole double-throw radio frequency switch function of ANT-TX and ANT-RX is realized, the switch insertion loss of an ANT-RX channel is reduced, the high power resistant performance of the switch can be realized by means of the equivalent negative bias under the condition of no negative voltage, and the problems that