Open AccessTriangular grid interconnected crossed rings antenna for large‐scale ultra‐wideband dual‐polarised arrays
Author(s) -
Zhang Yongwei,
Shi Quan,
ElMakadema Ahmed,
Danoon Laith,
Brown Anthony K.
Publication year - 2020
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.2019.0869
Subject(s) - broadband , planar , planar array , grid , wideband , square (algebra) , bandwidth (computing) , antenna array , optics , antenna (radio) , topology (electrical circuits) , electronic engineering , engineering , physics , computer science , electrical engineering , mathematics , telecommunications , geometry , computer graphics (images)
An ultra‐wideband phased array antenna using interconnected elements arranged in triangular lattices is investigated. The basic unit cell of the array is a dual orthogonal crossed ring structure. Each element is interconnected to its neighbour using capacitive loading. The ring structure on a planar surface produces broad frequency bandwidth with wide scan angles. Unlike other three‐dimensional elements such as Vivaldi antennas, the interconnected crossed ring elements can be readily configured on a triangular grid. As is well known from narrow band arrays, a triangular grid allows reduction in the total number of elements needed for a given performance compared to a square grid. The array presented here applies the triangular grid to a broadband planar structure to reduce the total number of elements required by 13% while the electromagnetic behaviour of the array is essentially maintained. An array prototype of the design has been manufactured and tested. The performance is compared to the associated array with a regular square lattice. The proposed triangular grid structure is shown to be an effective solution for applications where a minimum number of elements is required for large‐scale broadband dual‐polarised antenna arrays.