Bandwidth Enhancement of a Microstrip-Line-Fed Printed Wide-Slot Antenna With a Fractal-Shaped Slot

Author

Chen, Wen-Ling ; Wang, Guang-Ming ; Zhang, Chen-xin

Author_Institution

Radar Eng. Dept., Air Force Eng. Univ., Shaanxi Province, China

Volume

57

Issue

7

fYear

2009

fDate

7/1/2009 12:00:00 AM

Firstpage

2176

Lastpage

2179

Abstract

Microstrip-line-fed printed wide-slot antenna with a fractal-shaped slot for bandwidth enhancement is proposed and experimentally studied. By etching the wide slot as fractal shapes, it is experimentally found that the operating bandwidth can be significantly enhanced, and the relation between the bandwidth and the iteration order (IO) and iteration factor (IF) of the fractal shapes is experimentally studied. Experimental results indicate that the impedance bandwidth, defined by - 10 dB reflection coefficient, of the proposed fractal slot antenna can reach an operating bandwidth of 2.4 GHz at operating frequencies around 4 GHz, which is about 3.5 times that of a conventional microstrip-line-fed printed wide-slot antenna. It also achieved a 2-dB gain bandwidth of at least 1.59 GHz.

Keywords

UHF antennas; antenna radiation patterns; fractal antennas; microstrip antennas; slot antennas; bandwidth enhancement; fractal slot antenna; fractal-shaped slot; frequency 2.4 GHz; iteration factor; iteration order; microstrip-line-fed printed wide-slot antenna; Bandwidth; Etching; Fractals; Frequency; Impedance; Microstrip antennas; Reflection; Reflector antennas; Shape; Slot antennas; Bandwidth enhancement; fractal antenna; microstrip-line-fed antenna; slot antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2009.2021974

Filename

4907135