A Compact Yagi–Uda Antenna With Enhanced Bandwidth

Author

Arceo, Diana ; Balanis, Constantine A.

Author_Institution

Adv. Electromagn. Technol. Branch, SPAWAR Syst. Center Pacific (SSC PAC), San Diego, CA, USA

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

442

Lastpage

445

Abstract

A three-element compact Yagi-Uda antenna is pro posed that maintains a high absolute gain and low VSWR over a 10% fractional bandwidth with an element spacing of 0.053λ. The proposed Yagi-Uda antenna uses a director and reflector to create a dual resonance and approach superdirectivity at each resonant frequency. By adjusting the reflector and director´s resonant frequency, the gain and bandwidth of the antenna can be maximized. The driven element has one folded arm to increase the impedance of the antenna. The reflector and director elements are bowtie de signs to increase the bandwidth. The measured impedance and gain agrees well with the computational model.

Keywords

Yagi antenna arrays; directive antennas; reflector antennas; VSWR; antenna impedance measurement; bow-tie design; director resonant frequency; fractional bandwidth; reflector resonant frequency; three element compact Yagi-Uda antenna; Antenna arrays; Bandwidth; Gain; Impedance; Reflector antennas; Yagi-Uda antennas; Antenna arrays; Yagi antennas; compact antennas; folded antennas; superdirectivity;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2150730

Filename

5765545