Challal, M.Skoudarli, A.Aliouane, M. A.2023-03-212023-03-212022978-166548261-5https://ieeexplore.ieee.org/document/1001915510.1109/STA56120.2022.10019155https://dspace.univ-boumerdes.dz/handle/123456789/11226In this work, an ultra-wideband compact bandpass filter is developed. The filter structure is based on symmetrical pair of coupled lines, stepped-impedance stub and rectangular defected ground structure slots. A prototype of the obtained structure is fabricated and measured where a good agreement is noticed between simulated and experimental results. Good performances in terms of ultra-wide impedance bandwidth, from 2.9 to 10.6 GHz with a fractional bandwidth of 118.8 %, return loss better than 13 text{dB}, upper stopband attenuation higher than 20 dB up to 16 GHz and a sharp selectivity are obtained. The filter bandwidth makes it suitable for the several applications operating in this frequency rangeenBandpass filterDefected ground structureStepped-impedance stubUltra-widebandOther