Analysis of Stepped-Impedance Microstrip Low Pass Filter for L-Band Applications

Abstract

This paper presents stepped impedance low pass filter based on defected ground structure (DGS) cells. The proposed DGS cell provides low-pass characteristic whose cutoff frequency could be changed by tuning its dimensions. Design and analysis of the stepped impedance microstrip low pass filter has been described using CST software tool. In this paper, 5 th order stepped impedance low pass microstrip line filter have been designed at 1.4 GHz frequency and implemented on FR/4 substrate of relative permittivity is 4.3.