研究目的
To propose a low-cost patch antenna with circular polarization using a FR4 substrate for US standard UHF RFID application, with better impedance matching at 915MHz.
研究成果
The antenna proposed fulfils the purpose of being a low-cost alternative to a commercial circular polarized antenna. The simulation results showed good impedance matching, high gain, and low axial ratio at 915MHz. In the comparison with the commercial antenna, both antennas had similar reading performance. However, the antenna showed great sensibility in terms of the airgap thickness.
研究不足
The antenna showed great sensibility in terms of the airgap thickness, which means that the fabrication process should be very precise in order to present the performance expected in simulation.
