Performance Comparison of Various Configurations of Band Notched UWB Antennas

This paper presents a study on the efficiency and radiation performance of an Ultra-Wideband (UWB) antenna, emphasizing the effect of introducing slots in both the patch and the ground plane. A key challenge in the current design lies in identifying the optimal slot positions without compromising the antenna's radiation pattern. A critical examination is undertaken to choose slot placement in the radiating structure and in the ground Plane. The dimensional size of the Sierpinski fractal antenna is 14.90 x 14.80 x 1.6 mm3 which covers the entire UWB frequency ranges from 3 GHz to 11GHz. A band notch is created at 5.2GHz (i.e.) wi-fi band with varying meandered slot length in terms of λ. The substrate material used in the design is RT Duroid 5880 (εr = 2.2). The antenna that has been designed features impedance matching (S11 < -10 dB) in the entire operating range and the radiation pattern of measured is in agreement with the simulated one. This proves the antenna’s efficacy in usage for portable devices applications.