Ultra-Wideband (UWB) Filter With WLAN Notch

Strong narrowband signals like WLAN links may severely disturb UWB communication or sensor systems. In some cases, filtering out the respective frequency bands may therefore be of interest. This contribution proposes an additional notch filter within the passband of a broadband filter normally used to tailor the UWB spectrum. To this extent, a resonant slot is incorporated into one of the elements of a suspended stripline filter. Simulated and experimental results of a filter of this kind are presented, demonstrating the feasibility of this approach