Wide Stopband Lowpass Filter with Sharp Roll-off using Multiple Resonators

Conference: International Joint Conferences on Advances in Engineering and Technology
Author(s): Raphika P.M, Abdulla P, Jasmine P.M, Rekha T.K Year: 2018
Grenze ID: 02.AET.2018.1.9 Page: 147-154

Abstract

A compact and wide stopband microstrip lowpass filter with sharp roll-off by cascading multiple resonators on\nhigh impedance transmission line is presented. A center resonator and multiple side resonators are loaded symmetrically\nabout a high impedance transmission line. The filter has been designed and fabricated using a low cost glass epoxy material\nand the experimental result shows a very good agreement with the simulated results. The 3 dB cutoff frequency of the\nproposed filter is at 2.42 GHz. The measured roll-off rate of the filter is 73 dB/GHz at 20 dB attenuation level. The filter\nachieves a wide stopband from 2.65 GHz to 11 GHz with a suppression level of 20 dB.

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AET - 2018