A new compact broadband and high gain antenna by using the slotted inverted omega shaped ground plane and circular disc loaded radiator is presented. The designed antenna prototype is engraved on low cost thick substrate with compact electrical size of (0.201 lambda x0.16 lambda x0.01001 lambda) mm3 at 2 GHz frequency. Several prototypes have been designed and investigated to achieve the proper matching. The parametric study is conducted to attain an optimized prototype of antenna. The novelty lies in proposed antenna's simple structure with compact dimensions of radiator. It exhibits the peak realized gain of 9.93 dBi at 19.9 GHz, broadband fractional impedance bandwidth of 142.6% at 10 dB return loss, and stable radiation pattern across all the frequency sweeps. The antenna have been simulated, fabricated and tested. Moreover, frequency and time domain performance have been analyzed to validate the antenna design. Finally the comparison analysis with the state of the art existing work has been conducted. The simulated and tested results are in good agreement hence make the antenna suitable for UWB (3.1-10.6 GHz), WiMAX (3.5-5.8 GHz), C (4-8 GHz), H (6-8 GHz), X (8-12 GHz), Ku (12-18 GHz), Ka (18-26 GHz) and future wireless communication applications.
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