A new compact UWB filter using open-stubs

This paper reports on a new compact UWB band pass filter. Open resonator is employed and loaded with T- or L shaped open stub to achieve the UWB bandpass filter topology. The best performances filter are obtained by UWB filter based on T-open stubs compared to the other ones realized by UWB filter based on L-open stubs. 53% fractional bandwidth and 0.7dB insertion loss are gained experimentally. The proposed band-pass filter exhibiting with a wide pass-band from 5.4 to 9.4 GHz has been simulated and experimentally confirmed. The occupied size of studied filter is only 10×10 mm² without connectors. The experimental results show a excellent agreement with the simulation results.