A unidirectionally radiating monopole slot antenna

Author

Lin, Tz-Hsiung ; Sun, Te-Liang ; Wang, Chien-Jen

Author_Institution

Dept. of Electr. Eng., Nat. Univ. of Tainan, Tainan, Taiwan

fYear

2011

fDate

7-9 March 2011

Firstpage

282

Lastpage

285

Abstract

A wideband planar antenna with unidirectional characteristics is demonstrated based on the monopole slot antenna. By utilizing a stub-protruded feedline and adding two symmetrical stubs at the slot edge, the impedance-matching condition is improved. The resonance frequency of the monopole slot antenna is significantly shifted down, and the impedance bandwidth is enlarged. By changing the width of the ground plane, connecting one metallic finger at the upper right corner, and etching two asymmetrical slits in the ground plane as reflectors, the radiation directivity of the monopole slot antenna can be enhanced. The proposed antenna achieves a measured 97.4 % bandwidth for S₁₁ <; -10 dB at the center frequency of 2.31 GHz, better than 10 dB front-to-back ratio.

Keywords

broadband antennas; directive antennas; impedance matching; monopole antennas; planar antennas; slot antennas; frequency 2.31 GHz; ground plane; impedance-matching condition; metallic finger; radiation directivity; stub-protruded feedline; unidirectional radiating monopole slot antenna; wideband planar antenna; Antenna measurements; Antenna radiation patterns; Bandwidth; Fingers; Reflector antennas; Resonant frequency; Slot antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology (iWAT), 2011 International Workshop on

Conference_Location

Hong Kong

Print_ISBN

978-1-4244-9133-9

Type

conf

DOI

10.1109/IWAT.2011.5752329

Filename

5752329