Novel Approaches for Developing Wideband H-Plane Horn Antennas
摘要
In this paper, a low-profile wideband substrate-integrated waveguide (SIW) horn antenna is proposed. The antenna structure with a thicker substrate is designed to produce a smoother transition with lower reflection and radiation loss. The SIW horn is designed by gradually detaching the upper and lower metallic plane to enhance bandwidth and realize a smooth transition from the dielectric horn to free space. Additionally, air vias are arranged in a specific pattern in the flare part of the antenna to improve radiation performance and gain. The proposed SIW horn antenna demonstrates a wide operating bandwidth of 15 GHz to 25 GHz and achieves a high gain of up to 9.3 dBi.