High Gain End-fire Antenna Based on Spoof Surface Plasmon Polariton

A high-gain end-fire antenna based on Spoof Surface Plasmon Polariton is proposed. The antenna consists of SSPP transmission line loaded with two G-shaped resonators and five SSPP arrays. Better impedance matching can be achieved by adjusting the length of the SSPP transmission line. The antenna gain can be improved by adjusting the number of SSPP arrays. The antenna has a broadband characteristic of 14.4% (8.52-9.85 GHz) with a peak gain of 8.84 dBi at 9.60 GHz. The proposed antenna structure has a high antenna gain compared to other end-fire antennas.