Title :
A Wideband VHF/UHF Discone-Based Antenna
Author :
Chen, Aixin ; Jiang, Tiehua ; Chen, Zhizhang ; Su, Donglin ; Wei, Wenxuan ; Zhang, Yanjun
Author_Institution :
Sch. of Electron. & Inf. Eng., Beihang Univ., Beijing, China
fDate :
7/3/1905 12:00:00 AM
Abstract :
Few low-profile VHF/UHF antennas have been reported so far although they are demanded in many applications such as aircraft communication systems. In this letter, a low-profile wideband VHF/UHF antenna based on the conventional discone antenna is proposed. It is composed of a discone antenna that is flattened with additions of a cavity-backed discone, a short-circuited configuration, and a two-plate top structure. The simulation results show that the addition of the three structures makes the proposed antenna low-profile and wideband. A prototype with optimized geometrical parameters was fabricated and tested. The measurements show that the prototype has a VSWR bandwidth of 76% from 200 to 447 MHz, a height of only 0.087λmax, and a radiation pattern of omnidirectivity. The designed antenna has great potential for its flush-mount capability.
Keywords :
UHF antennas; VHF antennas; antenna radiation patterns; broadband antennas; omnidirectional antennas; VSWR bandwidth; aircraft communication systems; cavity-backed discone; flush-mount capability; low-profile VHF-UHF antennas; omnidirectivity; optimized geometrical parameters; radiation pattern; short-circuited configuration; two-plate top structure; wideband VHF-UHF discone-based antenna; Antenna measurements; Broadband antennas; Cavity resonators; UHF antennas; Wideband; Low-profile; omnidirectional; ultrahigh frequency (UHF); very high frequency (VHF); wideband antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2153818
