A Novel Planar Extended Doublet Filter with Substrate Integrated Waveguide Cavity Resonators

Abstract:

A novel planar extended doublet filter based on substrate Integrated waveguide cavity resonators was proposed for the first time. This filter consists of a main doublet with an additional resonator grown in one of the branches. The source and load are coupled to both branches of the doublet in order to generate two transmission zeros. By employing the combinational structure of the TE101-mode and TE102-mode of the SIW cavity resonators, the negative coupling coefficient required for the design of a single-layer cross-coupled SIW bandpass filter is implemented. The measurement results show the return loss of the implemented filter is above 13dB, the insertion loss is below 4.238dB with only 0.56% of the bandwidth.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 962-966
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.962
• Online since: January 2013
• Authors: Kai Shen, Tao Li, Jing Jing Wang
• Keywords: Cross-Coupled, Filter, Planar Extended Doublet, Substrate Integrated Waveguide (SIW), Transmission Zeros (TZs)

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