Wideband and compact quasi-Yagi antenna integrated with balun of microstrip to slotline transitions

Author

Nguyen, P.T. ; Abbosh, Amin ; Crozier, Stuart

Author_Institution

Sch. of Inf. Technol. & Electr. Eng., Univ. of Queensland, Brisbane, QLD, Australia

Volume

49

Issue

2

fYear

2013

fDate

January 17 2013

Firstpage

88

Lastpage

89

Abstract

A wideband quasi-Yagi antenna utilising a microstrip-to-coplanar stripline balun is presented. The antenna is designed to be compact, directional and wideband so that it can be used to form a circular array for a microwave imaging system. The feeding structure of the antenna includes an ultra-wideband balun that is formed using a pair of microstrip to slotline transitions. The simulated and measured results of the proposed antenna indicate more than 70% fractional bandwidth with more than 10 dB return loss, more than 18 dB front-to-back ratio and around 4 dBi gain.

Keywords

Yagi antenna arrays; antenna feeds; baluns; coplanar waveguides; microstrip antenna arrays; microwave imaging; slot antenna arrays; slot lines; ultra wideband antennas; antenna design; antenna feeding structure; circular array; compact quasiYagi antenna; fractional bandwidth; front-to-back ratio; microstrip-to-coplanar stripline balun; microstrip-to-slotline transition; microwave imaging system; ultra-wideband balun; wideband quasiYagi antenna;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2012.3192

Filename

6420068