Title :
Novel substrate integrated waveguide cavity filter with defected ground structure
Author :
Zhang, Lin ; Hong, Wei ; Wu, Ke ; Chen, Ji Xin ; Tang, Hong Jun
Author_Institution :
Center for Comput. Electromagn., Southeast Univ., Nanjing, China
fDate :
4/1/2005 12:00:00 AM
Abstract :
An open-structure eigenvalue problem of substrate integrated waveguide (SIW) cavity structures is investigated in detail by using a finite-difference frequency-domain method, and the quality (Q) factor of such SIW cavities is given. Based on the concept of a defected ground structure, a new class of SIW cavity bandpass filters are designed, fabricated, and measured around 5.8 GHz. With their fabrication on standard printed circuit boards, such filters present the advantages of high-Q factor, high power capacity, and small size. Simulated and measured results are presented and discussed to show promising performances of the proposed filters.
Keywords :
Q-factor; band-pass filters; cavity resonator filters; coplanar waveguides; eigenvalues and eigenfunctions; finite difference methods; frequency-domain analysis; SIW cavities; bandpass filters; cavity structures; defected ground structure; finite-difference frequency-domain method; open structure eigenvalue problem; quality factor; standard printed circuit boards; substrate integrated waveguide; Band pass filters; Coplanar waveguides; Eigenvalues and eigenfunctions; Electromagnetic waveguides; Finite difference methods; Integrated circuit measurements; Microwave filters; Millimeter wave technology; Performance evaluation; Waveguide components; Bandpass filter; cavity; coplanar waveguide (CPW); defected ground structure (DGS); eigenvalue problems; finite difference frequency domain (FDFD); open structure; substrate integrated waveguide (SIW);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2005.845750
