Performance of Microstrip Low-Pass Filter on Electromagnetic Band Gap Ground Plane

Abstract

In this work, the performance characteristics of a printed low-pass filter (LPF) were analyzed on an electromagnetic band gap (EBG) ground plane. A ninth order Chebyshev LPF was designed at 2.44 GHz cut-off frequency using Stepped Impedance Resonator (SIR) method. The simulation results show that the EBG pattern of rectangular slots etched on the ground plane and located offset from the center line not only offers an improved stopband characteristic but also reduces the overall size of the filter. Finally, a prototype model was developed based on the results obtained from the simulation and tested. The simulated and experimental results show good agreement.

Design of a low pass filter using rhombus-shaped resonators with an analyticalLC equivalent circuit

“…The transfer function can be calculated by Kirchhoff's voltage law (KVL) and Kirchhoff's current law (KCL) rules. The transfer function of the main resonator is written in (6).…”

“…Filters are used to choose or limit the RF/microwave signals within assigned spectral confines. Microstrip LPFs are important passive devices for suppressing noise and undesirable signals in communication systems [1][2][3][4][5][6].…”

Microstrip Low Pass Filter Designs Using Defected Ground Structure

“…In recent years there is increasing demand for broader bandwidth in wireless communication systems and many researches are going on the wideband filters [1][2][3][4]. In this work the Defected Ground Structures (DGS) [5][6][7][8][9][10] presented here is to improve the performance of a traditional microstrip low pass filters.…”

Elliptic low pass filter design using DGS slot for microstrip lines

“…MICROSTRIP LOW-PASS FILTER DESIGN WITH DGS INTRODUCING SLOTS IN GROUND LAYERBy setting proper values of the lumped elements of the filter the cut-off frequency of the low-pass filter[8][9][10][11][12] can be adjusted as per the requirement. The capacitor and inductance values of the filter elements by the stubs of the high/low impedance transmission lines are calculated based on the characteristic impedance Z O, effective dielectric constant ε eff and the dielectric constant ε the width W of the transmission line and the height h of the substrate which in this design is h=1.2mm.…”