A Review on Design of Multiband Bandpass Filter Using Different DGS Structures to Enhance the Performance

Abstract

In this paper, we discussed about the work done by researchers for the enhancement of performance of a multiband BPF by introducing different defected ground structure (DGS) geometries. A DGS structure on a conventional inductively coupled band pass filter is used to miniaturize the resonator. By introducing a DGS on the transversal dimension of the CPW, it enhances filter performance. The DGS cell also transforms a single band to a multiband BPF by using this structure. The design technique of the filters with the DGS can be explained at very high frequencies in GHz ranges and give very accurate simulated and measured results.

Design of double-notch UWB filter with upper stopband characteristics based on ACPW-DGS

“…The introduction of defective ground structure (DGS) [ 29 , 30 ] is an innovation in the design of CPW. In recent years, it is often used to reduce the size of microwave components, this structure changes the current distribution of the transmission line on the ground plane by etching the defect pattern on the ground plane, thereby changing its equivalent capacitance and inductance distribution [ 31 , 32 ]. The position of the groove line and the width of the groove line are the key parameters in the research.…”

Design and Fabrication of a Compact Branch-Line Coupler Using Resonators with Wide Harmonics Suppression Band

“…Several works [10][11][12][13][14][15][16] have used a defected ground structure (DGS), photonic bandgap (PBG) cells and electromagnetic bandgap (EBG) cells for cancelling the harmonics and reducing the large size of BLCs. These cells need an extra implementation process, which increases the design complexity.…”