Open AccessTransient linear TEM horn array
Author(s) -
Elmansouri Mohamed A.,
Filipovic Dejan S.
Publication year - 2017
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.2017.0006
Subject(s) - bandwidth (computing) , time domain , wideband , optics , frequency domain , acoustics , french horn , electronic engineering , materials science , computer science , physics , engineering , telecommunications , computer vision
This study presents an ultrawideband transverse electromagnetic (TEM) horn array with enhanced frequency‐ and time‐domain performances for high‐power transient and short‐pulse radiation applications. The proposed linear array is composed of five combined TEM horn and loop elements. The compact size, wideband performance, and low‐dispersion characteristics of the utilised element enable good time and frequency operations over more than two‐octave bandwidth. The performance of the designed array is characterised computationally and experimentally. The scanning capabilities are also demonstrated; particularly for the time‐domain operation using fidelity factor and energy patterns. Moreover, conventional frequency‐domain side lobes (SLL) reduction techniques are utilised to minimise the time‐domain radiation at undesired directions. The proposed array has VSWR<2, gain > 8 dBi, good quality radiation patterns, and SLL<−10 dB over more than 4:1 bandwidth. Excellent time‐domain performance demonstrated by high fidelity factor over the array's field of view is achieved. Time‐domain scan up to 40° is also demonstrated.