Monopole-based Wideband Antenna with Embedded Band-notch for Applications in Upper UWB

In this letter, a wideband antenna with band-notch characteristics for application at the upper part of the ultrawideband (UWB) spectrum is presented. The proposed monopolebased wideband antenna with the in-built band-notch property has an overall dimension of $0.34 \lambda_{0} \times 0.39 \lambda_{0} \times 0.024 \lambda_{0} \mathrm{~mm}^{3}$. The design incorporates a simple annular ring on the bottom layer, facilitating easier fabrication and eliminating the need for expensive microwave filters. Parameter analysis shows that adjusting the ring and patch dimensions can easily shift the stop band, effectively filtering interference in the crowded $6 \mathbf{~ G H z}$ band. The measurement results and time domain characteristics confirm that the proposed system can be a suitable, cost-effective choice for the upper UWB application.