Abstract
The design of radiation efficient antennas for ultrawide band (UWB) signalling is a challenging step in the design and development of UWB communication systems, especially when UWB signals co-exist with previously standardized narrowband (NB) wireless services. This work presents a compact UWB antenna design that is capable of suppressing NB interference (NBI) signals. The immunity of the proposed design to NBI is tested both experimentally and through simulations. Moreover, the experimentally measured spectral characteristics are employed in simulating the impact of the proposed UWB antenna on a typical UWB signalling waveform. Both experimental and simulation results confirm the capability of the proposed design to suppress NBI signals at six different frequencies, corresponding to the most frequently used wireless services at these frequencies, while introducing an almost negligible distortion to the UWB signalling waveforms.
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