Compact super-wide bandpass substrate integrated waveguide (SIW) filters

• Published in: IEEE transactions on microwave theory and techniques Vol. 53; no. 9; pp. 2968 - 2977
• Main Authors: Zhang-Cheng Hao, Hong, Wei, Ji-Xin Chen, Xiao-Ping Chen, Wu, Ke
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Band pass filters; Banded structure; Bandpass; Bandpass filter; Bandpass filters; Circuit properties; coplanar waveguide (CPW); Coplanar waveguides; defect ground structure (DGS); Electric, optical and optoelectronic circuits; electromagnetic bandgap (EBG); Electromagnetic waveguides; Electronic circuits; Electronics; Exact sciences and technology; Frequency filters; Insertion loss; Metamaterials; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwaves; Millimeter wave technology; Periodic structures; Planar waveguides; Polystyrene resins; Power harmonic filters; Simulation; substrate integrated waveguide (SIW); Waveguides; Wideband; Performance evaluation; Waveguide filters; defect ground structure (DGS); Photonic band gap; Wide band circuit; coplanar waveguide (CPW); Waveguide; Periodic structure; Case study; electromagnetic bandgap (EBG); Bandpass filter; Wide band; Simulation; substrate integrated waveguide (SIW); Insertion loss; Band pass filter; Coplanar waveguides
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/TMTT.2005.854232

It is known that the substrate integrated waveguide (SIW) features high-pass characteristics of the conventional waveguide, and a periodic structure (PS) generally presents bandstop characteristics. Therefore, a super-wide-band bandpass characteristic should be realized by combining some sort of PS into the SIW. In this paper, three types of compact SIW-PS wide-band bandpass filters are proposed and investigated with simulation and experiment. Performances of a super-wide bandpass, for instance, 8.5-16.5 GHz in this case study, with low insertion loss and sharp out-of-band characteristics are observed from both simulated and measured results.