Miniaturized Reconstructed Antenna Based on Coupled Feed

In order to meet the needs of miniaturization of wireless communication systems and antenna multi-function, a reconfigurable antenna for application in the ultra-high frequency band is proposed. The antenna uses multiple bent antennas and end capacitive antennas to reduce the antenna size and use a feeder ring to feed electricity, which can better match the impedance of the chip. Add a diode to the feeder loop and change the feeder loop structure by controlling the state of the diode. The simulation results show that the antenna can operate in three modes: 0.915GHz, 1.3GHz, 2.25GHz three single-band modes. The antenna size is 65.0mm×25.0mm×1.6mm, which meets the needs of miniaturization and has good gain.