Design of Low-Profile End-fire Antenna Based on Interfinger H-type Spoof Surface Plasmon Polaritons

Abstract

This letter proposes a small-aperture and end-on-fire antenna based on spoof surface plasma polaritons (SSPPs). The antenna consists of a coplanar waveguide (CPW), a transition structure, an interfinger H-type SSPPS transmission line, and a radiating branch. The artificial surface plasmon (SPP) can bind the signal in the groove of the antenna surface, and the structure of the interfinger H -shaped transmission line has stronger field constraint ability, so that the antenna can reduce the loss. Radiant branches radiate energy into free space. The test results show that the return loss of the antenna is less than −10dB in the frequency range of 8.7~11.5 GHz, and the maximum gain can reach 10.8dBi in the frequency range of 10.4GHz.