RFID (radio frequency identification) tag antenna simulation design method and tag antenna

The invention relates to an RFID (radio frequency identification) tag antenna simulation design method and a tag antenna. When the tag antenna provided by the invention is in a chip short circuit state, both the eigen frequency of a tag and the emission frequency of a reader are 915MHz, and at the time, the tag resonance and the tag echo are the most and are used for presenting a binary system 1. In the chip matching state, the input resistance of the tag antenna is matched with the chip resistance conjugation, the maximum input power of a chip is obtained, and the tag echo is the least and is used for representing the binary system 0. The RFID tag antenna is in a single-side structure, a medium base plate adopts an RF-4 plate, and a conducting material adopts metal copper; and the RFID tag antenna consists of a pair of main radiating bodies, a resonance matching unit and two feed lines. The designed RFID tag antenna is applied in an RFID tag antenna system, so the whole RFID reader has the best distinction degree on 1 and 0, the modulation ratio is the maximum, the reading error rate of the reader is also lowered to the minimum, and the readability index is improved.