Triband Circularly Polarized Koch Fractal Boundary Microstrip Antenna

Author

Reddy, V.V. ; Sarma, N.V.S.N.

Author_Institution

Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Warangal, India

Volume

13

fYear

2014

fDate

2014

Firstpage

1057

Lastpage

1060

Abstract

A novel single-layer single-probe-feed asymmetrical fractal boundary microstrip antenna is considered for triband circular polarization (CP) operation. Four different structures-without-slot (Ant1), rectangular (Ant2), fractal (Ant3), optimized-fractal-slot (Ant4)-are studied for multiband CP radiation. Perturbation in the structure for triband CP radiation is introduced by employing optimized asymmetrical Koch fractal curves as boundaries of a square patch and embedded rectangular slot. The generated 3-dB axial-ratio bandwidths of Ant 4 are 3.2%, 1.6%, and 3.0% at operating frequencies around 2.45, 3.4, and 5.8 GHz, respectively. Measured results that are in close agreement with the simulation results demonstrate that the proposed antenna is well suited for the WLAN/WiMAX wireless applications.

Keywords

antenna feeds; fractal antennas; microstrip antennas; multifrequency antennas; Ant1; Ant2; Ant3; Ant4; WLAN-WiMAX wireless applications; embedded rectangular slot; fractal boundary microstrip antenna; fractal structures; multiband CP radiation; optimized-fractal-slot structures; perturbation; rectangular structures; single-layer single-probe-feed asymmetrical antenna; square patch; triband circularly polarized Koch antenna; without-slot structures; Bandwidth; Feeds; Fractals; Microstrip antennas; Slot antennas; Wireless communication; Axial ratio; circular polarization; fractal; triband;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2327566

Filename

6823650