RADIO FREQUENCY IDENTIFICATION RECEIVER/TRANSCEIVER DEVICE

摘要

PURPOSE: An RFID transceiver is provided to naturally connect to a various network without considering time and place which a ubiquitous network technology. CONSTITUTION: A directional coupler(300) outputs a reflective signal reflected from a progressive wave signal which is inputted to antenna and the antenna. A standing wave ratio detection unit(400) detects standing wave ration by using the progressive signal and a reflective signal. A standing wave control unit(500) controls the characteristic of standing wave ratio according to the detected standing wave ratio. The standing wave control unit uses the detected standing wave and the standing wave ration reference signal.