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

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

450

Lastpage

453

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 0.087λ_max, 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;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2153818

Filename

5765648