Open AccessDual‐polarised wideband tightly coupled dipole array for airborne applications
Author(s) -
Johnson Alexander Dale,
Zhong Jingni,
Sekelsky Stephen,
Alwan Elias A.,
Volakis John L.
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.2019.0674
Subject(s) - standing wave ratio , broadside , wideband , optics , dipole antenna , ground plane , dipole , radome , materials science , resistive touchscreen , conductor , bandwidth (computing) , acoustics , physics , antenna (radio) , optoelectronics , electrical engineering , engineering , microstrip antenna , telecommunications , quantum mechanics , composite material
An ultra‐wideband (UWB) array is presented for UHF‐S band (0.19–2.3 GHz) communications with an emphasis on dual‐linear polarisation and wide‐angle scanning. The array achieves 12:1 impedance bandwidth for a voltage standing wave ratio (VSWR) <3 at broadside with low‐angle scanning off broadside to 0°, 45°, 60° in the E ‐plane (VSWR < 3, 4, 3.1) and 0°, 45°, 60° (VSWR < 3, 3.8, 5.5) in the H ‐plane. A 7 × 11 prototype was fabricated and tested for verification. In addition, finite effects with respect to mounting UWB arrays in airborne platforms are discussed. Specifically, the effect of radomes, perfect electric conductor shielding walls and resistive walls on the gain of the designed tightly coupled dipole antenna was studied, showing that losses can approach 2 dB.