Open AccessSingle‐feed low‐profile resonant cavity antenna covering entire Ku‐band
Author(s) -
Hashmi R.M.,
Esselle K.P.
Publication year - 2016
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.2016.0392
Subject(s) - directivity , ku band , materials science , bandwidth (computing) , optics , microstrip antenna , dielectric , antenna (radio) , antenna gain , patch antenna , acoustics , antenna efficiency , physics , optoelectronics , telecommunications , computer science
A simple single‐feed resonant cavity antenna having a flat, low‐profile all‐dielectric partially reflecting surface (PRS) is described, which has a wide 3 dB bandwidth covering the entire Ku‐band. The PRS is composed of three dielectric sections, forming a planar slab with the dielectric constant of the slab decreasing from the centre to the edge in three steps. In addition to the directivity enhancement (up to 10 dB over the feed antenna), it is shown that such single‐layer PRSs remarkably improve the bandwidth of RCAs while reducing the profile of the antenna significantly. The total height of the antenna prototype is only 0.65 λ 0 at the lowest operating frequency. Experimental results are included to validate the proposed concept.