Multiband Monopole Antenna with Sector-Nested Fractal

Jie Zhang, Wei Zhang

Joint-Lab. of JNU-IREE RAS, College of Information Science and Technology, Ji Nan University (JNU), Guangzhou, China.

DOI: 10.4236/wet.2015.63005                

Abstract

A kind of novel multi-frequency monopole antenna with sector-nested fractal is proposed and designed, which is nested with a series of similar circular sector elements. By means of the trapeziform ground plane with the tapered CPW (coplanar waveguide) feeder in the middle, the antenna’s radiation performance is greatly improved. The antennas can synchronously operate in three frequencies, covering the working frequency bands of WLAN/WiMAX, 2.44 GHz/3.5 GHz/5.2 GHz - 5.8 GHz. The pattern and impedance measurements of antenna show a good performance over the WLAN/WiMAX band; it possesses a near omni-directional characteristic and good radiation efficiency. Moreover, the antenna is miniature and its design idea can be easily applied into other types of nested structure, the features of which make the proposed antenna have a promising application in other fields.

Keywords

Sector-Nested, Fractal Antenna, Trapeziform Ground Plane, Multi-Frequency

Conflicts of Interest

The authors declare no conflicts of interest.

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