Ultrawideband Low-profile Tightly Coupled Dipole Array

A design of ultra-wideband, low-profile tightly coupled dipole array (TCDA) with wide-scan capability is introduced in this paper. The basic element is a planar tightly coupled dipole, and the wide-angle impedance matching (WAIM) is composed of a passive tightly coupled dipole and a split-ring resonators. The proposed TCDA achieves performance of 5.8:1 (2-11.76GHz) bandwidth with
$\text{VSWR} < 3$
when scanning to ±60° in E-plane and
$\text{VSWR} < 3.4$
when scanning ±45° in
$H$
-plane. The total profile of the antenna array is
$0.095\lambda$
at 2GHz.