A Compact E Shaped MMR Wideband Bandpass Filter with Notched Band Utilizing SIR

This article presents a compact E-shaped wideband bandpass filter with a single notch band. The wideband response of proposed bandpass filter is obtained from E shaped multimode resonator (MMR). A single notched band is obtained by embedded a SIR to suppressed the radio signal fall in passband range. This filter demonstrates a fractional bandwidth of 119.4%. To verify the effectiveness of the design, the filter is fabricated on FR4 with a dielectric constant (ε_r) of 4.4 and a thickness(t) of 1.6 mm. The passband is from 2.43 to 9.63 GHz, with a notch at 5.86 GHz. The designed bandpass filter demonstrates an insertion loss of 1.76 dB and a return loss > 10 dB. The filter has a compact size of 24 mm× 6.52 mm.