Open AccessHigh‐gain low‐RCS slot antenna array based on checkerboard surface
Author(s) -
Jiang Hao,
Xue Zhenghui,
Zeng Qingyun,
Li Weiming,
Ren Wu
Publication year - 2018
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.2017.0524
Subject(s) - optics , wideband , conductor , slot antenna , antenna (radio) , bandwidth (computing) , physics , dipole antenna , materials science , engineering , electrical engineering , telecommunications , composite material
In‐band and out‐of‐band radar cross‐section reduction (RCSR) as well as gain enhancement for a slot antenna array is presented. The checkerboard surface (CS), combining an electromagnetic band gap structure and a metallic grounded slab, is adopted to realise a wideband RCSR. The analysis indicates a 10 dB RCSR of the CS compared with the perfect electric conductor surface can be achieved over 60% frequency bandwidth. Then, the designed CS is placed on the top surface of the 2 × 2 slot antenna array, and the measured results reveal that the proposed slot array possesses in‐band and out‐of‐band RCSR from 5 to >12 GHz for both co‐ and cross‐polarisations. Apart from the wideband RCSR, the gain enhancement is about 2.1 dB compared with the slot antenna array without the CS.