Open AccessDesign and application of high‐power cavity‐backed helical antenna with unit ceramic radome
Author(s) -
Li Xiangqiang,
Liu Qingxiang,
Zhang Jianqiong
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.0153
Subject(s) - radome , coaxial antenna , antenna (radio) , antenna factor , antenna measurement , antenna efficiency , dipole antenna , radiation pattern , optics , materials science , acoustics , engineering , electrical engineering , physics
A high‐power cavity‐backed helical antenna with a unit ceramic radome is proposed and investigated for the first time. The helical antenna uses a unit ceramic radome to realise a vacuum seal for a single‐element antenna, and the radome is designed in a thin‐wall structure to maintain low insertion loss. The proposed antenna uses a backed cavity in a cylindrical structure to reduce the mutual coupling among elements. An S‐band antenna prototype with a centre frequency of 2.856 GHz is designed and optimised. The performance of the antenna is simulated, including radiation performances and the power‐handling capacity. This antenna is applied in an S‐band 16‐element sub‐array and a 256‐element array antenna. The experiment results validate that this antenna can realise favourable circularly polarised radiation in its axial direction in the frequency range of 2.7–3.0 GHz, and the average power‐handling capacity for a single‐element antenna is at least ∼4.7 MW.