Millimeter-wave substrate integrated waveguide bandpass filters based on stepped-impedance E-shaped defected ground structures

This article presents a new defected ground structure (DGS) and expands its application for designing high-performance bandpass filters based on substrate integrated waveguide (SIW) platform. The presented DGS is consisted of two complementary stepped-impedance E-shaped structures and placed them together face-to-face. Such designed DGS is inserted into the top layer of a millimeter-wave SIW to act as high-frequency stopping property. Based on the proposed DGS, two high-performance SIW bandpass filters with single-band and dual-band features are achieved, by fabricating prototypes and experimentally investigating the filtering performances. Good agreements between the simulations and experiments are obtained. Such proposed SIW bandpass filters based on the designed new DGS can be widely used in the upcoming 5G communication area.

Automated summary

This article introduces a new defected ground structure (DGS) for designing high-performance bandpass filters on the substrate integrated waveguide (SIW) platform, achieving single-band and dual-band filter features. The experimental results validate good agreements between simulations and performance, showing potential for wide application in the upcoming 5G communication area.