A Miniaturized wide Stopband Low-pass Filter using T and Modified L Shapes Resonators

A new structure of microstrip-based low-pass filter with wide stopband and sharp roll-off is introduced, in this paper. In the proposed topology, resonators T modified L Shapes have been used. To improve suppression factor relative bandwidth, second resonator has added to first resonator. The designed fabricated on a 20 mm thickness RO4003 substrate, which loss tangent 0.0021 dielectric constant equal 3.38. All parameters including roll rate, stopband, return loss, insertion figure merit significant coefficients. Simulation ran using advanced design system software. 3dB cutoff frequency appropriate. value parameter <0.1 dB S11 −22 at point. extended from 2.42 up 24 GHz, shows an ultra-stopband. results simulation experiment are almost similar, indicates proper performance structure.