Wideband printed slot antenna using Koch fractal metasurface structure

This is the authors' abstract. We don't add key points for this paper.

A novel wideband slot antenna with Koch fractal metasurface structure is presented in this letter. Using Koch metasurface as a slot edge, the proposed antenna obtains excellent performance in bandwidth. For optimal bandwidth, optimization is done for both iteration angle (IA) and iteration factor (IF) at each iteration order (IO). The measured results show that the impedance bandwidth of the optimized antenna can reach about 1.75 octaves (1.45-4.86 GHz) for VSWR ≤ 2. In addition, stable radiation patterns are observed over the whole operating band of the proposed antenna.