Design of An Ultra-wideband Miniaturized Conformal Antenna

Abstract

The research of conformal antenna has increasingly become a major focus of modern antennas. In this paper, an ultra-wideband miniaturized conformal antenna is proposed. The proposed antenna consists of a coaxial-to-waveguide broadband transition structure and two identical slots on the sidewall of the traditional ridged waveguide structure. By adjusting the coaxial to waveguide transition structure and slots on the side wall of the waveguide, the conformal antenna can not only achieve good matching in a certain bandwidth, but also achieve miniaturization. The proposed antenna is simulated and optimized by using electromagnetic simulation software HFSS. The results show that in the 2GHz -18GHz, the VSWR is less than 2.5, the maximum gain is greater than 5dBi, and the pattern is stable and has no split lobes within 30 degrees.