LAUSR

In this article, a dual-layered ultra-wideband hexagonal-shaped patch antenna with an EBG structure is presented for IEEE C, X, Ku and K band applications. Parametric analysis of slots, notches, substrate height, substrate stacking, and EBG structures demonstrates the intermediate and finally optimized results. The proposed antenna (A9) is considered for desired specifications after a systematic investigation of ten different antennas (A0–A9). Experimental ultra-wideband (5.1–19.7 GHz) with an impedance bandwidth (S11 <  − 10 dB) of 117.7% and 5.7dBi peak gain is observed for the proposed antenna. A constant group delay in the entire frequency range with a maximum group delay of 0.85 ns at resonating peaks is observed.