Open AccessQuasi‐Cassegrain metasurface antenna with shielded vias and wide bandwidth
Author(s) -
Gao Guoping,
Yang Chen,
Hu Bin,
Wang Shaofei,
Zhang Ruifeng
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.2018.6001
Subject(s) - shielded cable , cassegrain reflector , bandwidth (computing) , cassegrain antenna , optics , computer science , electronic engineering , antenna (radio) , physics , microstrip antenna , engineering , telecommunications , periscope antenna , telescope
A novel quasi‐Cassegrain metasurfaces (MS) antenna with wide bandwidth operating in 8 GHz band is proposed. Initially, the article demonstrates a complete set of working principles and design approach for the proposed antenna. Then, this antenna is optimised, manufactured, and measured. The profile of the antenna is further reduced by using the reflect‐array based on MS, and the gain is improved by loading shielded vias. Note that the second resonant frequency generated from sub‐reflector is utilised to extend the bandwidth. The measured results indicate that the antenna achieves the peak gain of 15.9 dBi, impedance bandwidth of 1.07 GHz, and half power beam width of 26° in E plane and 21.5° in H plane. It has a low profile of 26.5 mm (0.71 λ 0 ) and occupies an area of 120 mm × 120 mm (3.20 λ 0 × 3.20 λ 0 ). The article not only completes the antenna operating in 8 GHz band but also provides a reference for the design of the proposed quasi‐Cassegrain antenna in microwave band.