Design of a Miniaturized UHF Band Patch Antenna Inspired by the Metamaterial Technology

A miniaturized patch antenna is designed operating in the UHF band inspired by the metamaterial technology. By embedding the I-type metamaterial structures in the air substrate, one patch antenna with patch size of 60mm×60mm can resonate at 804MHz in a numerical study. The electrical patch size is only 0.16λ×0.16λ. The simulated impedance bandwidth is from 791 to 817MHz (3.2%). The peak antenna gain and efficiency is 4.24dBi and 97.4% respectively. These performances are acceptably high for such a compact antenna.