CST – Computer Simulation Technology

Designing a Band Notch Filter for a UWB Antenna

High-data-rate wireless communications need wide bandwidths. In the Ultra-Wideband (UWB) frequency band from 3.1 GHz to 10.6 GHz, information may be spread over a large bandwidth at low power levels thus creating the possibility to share the spectrum with other users. To prevent interference with existing wireless systems, like IEEE 802.11a WLAN, stop band characteristics are required from 5 GHz to 6 GHz (from Low-cost, compact UWB antenna with frequency band-notch function. H.J. Visser). The notch filter function is designed in a low-cost circular planar dipole antenna based on the ‘two-penny’ dipole. To achieve the required specifications for this notch function we first used the CST® optimizer. Secondly we systematically optimized the design. In this presentation we want to show the results of both approaches to achieve a maximum result and to try to understand the working of this notch and spur function in this compact UWB antenna.

Ad Reniers, Technical University Eindhoven 

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