Open AccessBroadband and high gain waveguide‐fed slot antenna array in the Ku‐band
Author(s) -
GuanLong Huang,
ShiGang Zhou,
TanHuat Chio,
TatSoon Yeo
Publication year - 2014
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.2013.0702
Subject(s) - optics , antenna gain , broadband , beam waveguide antenna , antenna feed , bandwidth (computing) , slot antenna , antenna array , antenna aperture , materials science , waveguide , antenna measurement , antenna (radio) , optoelectronics , antenna factor , electrical engineering , dipole antenna , physics , telecommunications , engineering
A broadband and high‐gain slot antenna array operating in the Ku‐band is reported in this study. The antenna is with waveguide‐fed cavity backed configuration and made entirely via simple milling process. The overall antenna structure consists of four layers. The bottom layer is a waveguide feed network to provide corporate power division. In turn, the waveguide feed network is excited by a conventional coaxial probe from the back. The waveguide network couples energy to an array of cavity via an aperture plate. These constitute the middle two layers. Each cavity then excites a subarray of 2 × 2 radiating slots in the top layer. The radiating slot elements and the feed network are designed to achieve wide bandwidth and high‐gain performance. Finally, an 8 × 8 array antenna has been designed and fabricated with about 25 dBi gain over 14.8% bandwidth, and the cross‐polarisation was around −30 dB in the boresight.