An Ultra-Wideband Microstrip Antenna Based on Koch Fractal Resonance Unit and CSRRs Defective Ground Unit

Abstract

This paper presents a coplanar waveguide ultrawideband antenna based on Koch fractals and complementary open resonance rings. The antenna can work in the frequency band of 2.95-15.5GHz, which completely covers the entire ultrawideband antenna spectrum of 3.1GHz-10.6GHz, which can be used in communication. The overall size of the antenna is 35mm * 30mm * 1.6mm. The antenna is loaded with a triangular Koch fractal on a regular hexagon and etched a complementary open resonance ring on a coplanar waveguide. S11 is below -10dB in the 2.95-15.5GHz band, the bandwidth of the proposed antenna is significantly increased.