Open AccessConformal platform‐embedded horn antenna with ultra‐wide bandwidth and low profile
Author(s) -
Chen Zhuozhu,
Shen Zhongxiang,
Zhang Jun,
Zhang Gary
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.6096
Subject(s) - horn antenna , conformal map , bandwidth (computing) , french horn , conformal antenna , microstrip antenna , physics , computer science , telecommunications , acoustics , antenna (radio) , slot antenna , mathematics , geometry
This article presents an H ‐plane horn antenna exhibiting very wide bandwidth, low profile, and nearly end‐fire radiation. A wideband coaxial‐to‐waveguide transition is proposed by employing ridged waveguide and metallic posts in order to enhance the bandwidth and to suppress the higher mode, respectively. An ellipse‐shaped copper taper is extended along the horn aperture in order to obtain smooth transition from the aperture to free space. The proposed antenna can be fully embedded in a conducting platform. Simulated results show that the proposed conformal antenna achieves a very wide bandwidth from 3.4 to 18 GHz for VSWR ≤ 2.5 while retaining the antenna height of only 5.508 mm (0.062 λ 0 at the lowest operating frequency). Nearly end‐fire radiation is obtained over the whole frequency band. The prototype of the conformal configuration with six antenna elements embedded into a large cylindrical platform is fabricated and tested, measured results are in good agreement with simulated ones.