Abstract
Data traffic is expanding in direct proportion to advancements in electronic systems and wireless communication. Increased bandwidth can alleviate data congestion. To meet the aforementioned demand, a rectangular U-slotted ultrawideband (UWB) dual-notch antenna with a half-cut ground structure is introduced in this work. The UWB is achieved by connecting the radiator via a steps-type structure having a 1-mm dimension around the radiator's edges. Furthermore, the ground plane is lowered, with horizontal slits etched on it. The radiator and ground plane modifications aid in achieving a larger impedance bandwidth. The UWB antenna has an overall geometry of 40 &times; 30 &times; 1.6 mm<sup>3</sup>. The projected UWB antenna operates in the frequency range of 2.6-3.9 GHz with greater than 3.2 dB gain across the impedance bandwidth. To achieve the notching in the design, a U-shaped slot is carved in the radiator. This modification leads to dual-notch frequency bands ranging from 3.8 to 5.3 and 6.2 to 7.3 GHz, thereby covering worldwide interoperability for microwave access and satellite bands. In this study, the time-domain features were also examined, and group delay was found to be less than 1 ns across the operational frequency except at the notch band. The simulated and measured results were in line and assure that the designed antenna is appropriate for UWB applications.
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