Gain and Radiation Pattern Enhancement of the H-Plane Horn Antenna Using a Tapered Dielectric Lens

IEEE Access

Rong-Bu He¹  Qi Wu²  Ping Wang²  Wei Luo² 

[1] Electric Power Research Institute, Guizhou Power Grid Company Ltd.;School of Communications and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing, China;

关键词: End-fire antenna;    horn antenna;    tapered dielectric lens;    wideband;    high gain;   

DOI  :  10.1109/ACCESS.2019.2915934

来源: DOAJ

【 摘 要 】

The design of a high-gain and low-profile H-plane horn antenna embedded into a large metallic platform is proposed. The antenna is composed of three parts: coaxial-to-ridged transition, wideband H-plane antenna, and dielectric lens. The coaxial-to-ridged transition makes an efficient conversion from TEM modes in a coaxial probe to the fundamental TE₁₀ mode in a ridged horn, and by choosing the ratio between horn aperture and length and suppressing the TE higher mode, the optimal design of the H-plane horn antenna can be obtained. Then, a tapered dielectric lens is located in the end-fire direction, which converts the TE wave into the leaky-wave mode, enhancing the peak gain. A prototype of the proposed antenna is finally fabricated and tested. The measured results are in good agreement with the simulated ones, which show that the proposed antenna has a very wide bandwidth from 2.5 to 20 GHz for the voltage standing wave ratio (VSWR) <; 2.5 and exhibits a low thickness of only 8 mm (0.066λ_L, λ_L is the free-space wavelength at the lowest operating frequency). Good radiation pattern and high gain can be achieved over a wide frequency band.

【 授权许可】

Unknown