Design of inverted F antenna for identification card of ZigBee accurate positioning

An inverted F antenna with small size, high bandwidth and radiation efficiency was designed according to demand for antenna of ZigBee accurate positioning identification card. Simulation and performance evaluation for the inverted F antenna was carried out through full-wave electromagnetic field simulation software. The simulation results show that the inverted F antenna can work in ZigBee band of 2.405-2.484 GHz, antenna return loss is less than -10 dB, the maximum gain is up to 2.5 dB under the center frequency of 2.45 GHz, and the antenna is omnidirectional. The actual test results in coal mine roadway also show that the inverted F antenna can meet practical needs of identification card of ZigBee accurate positioning.