A Dual-Mode Substrate Integrated Waveguide Filter With Controllable Transmission Zeros

Abstract

In this letter, a circular dual-mode substrate integrated waveguide (SIW) filter with two controllable transmission zeros is proposed. Two vias situated on a diameter line are employed to perturb two modes in a circular substrate integrated waveguide resonator. Taking advantage of the modal orthogonality of multiple cavity modes, transmission zeros are created. By moving the vias along the diameter line, the transmission zeros can be adjusted. The coupling matrix is employed to analyze the design concept. A three-pole filter with the center frequency at 8 GHz and two transmission zeros at 8.6 and 9.2 GHz is designed and fabricated. Experimental and simulated results are presented which validate the design concept of the proposed filter.

Keywords

Funding Information

Program for New Century Excellent Talents in University (NCET-13-0095, NCET-11-0066)
NSFC (61271026)

This publication has 6 references indexed in Scilit:

Substrate Integrated Waveguide Filters: Design Techniques and Structure Innovations
IEEE Microwave Magazine, 2014
Design and Implementation of a Triple-Mode Planar Filter
IEEE Microwave and Wireless Components Letters, 2013
Design of Bandpass Filter Based on Hybrid Planar Waveguide Resonator
IEEE Transactions on Microwave Theory and Techniques, 2010
Compact cross-coupled circular cavity filters using multilayer substrate integrated waveguide
Electronics Letters, 2009
Design of a Substrate Integrated Waveguide (SIW) Filter Using a Novel Topology of Coupling
IEEE Microwave and Wireless Components Letters, 2008
Development of Millimeter-Wave Planar Diplexers Based on Complementary Characters of Dual-Mode Substrate Integrated Waveguide Filters With Circular and Elliptic Cavities
IEEE Transactions on Microwave Theory and Techniques, 2007

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