A novel ultra-wideband end-fire antenna based on spoof surface plasma polaritons

Abstract A novel ultra-wideband end-shot antenna based on artificial surface-isolated excitations (SSPP) is designed. The antenna adopts a coplanar waveguide structure and introduces an SSPP transmission line consisting of a symmetric exponential Gaussian curve reference ground and an elliptical aperture-type cell, which effectively improves the bandwidth of the SSPP antenna and realizes the high-frequency operating characteristics of this antenna. In addition, the design combines the asymmetric structure of the SSPP transmission line and the guided branch structure to enhance the directivity of the antenna. The measured results of the antenna show that the antenna operates in the bandwidth range of 21.5–34.0 GHz, and the average gain of the antenna in the whole operating bandwidth range reaches 9.4 dBi, and the average radiation efficiency is 92.6 %, which can be better applied in the field of high-frequency communication.