volume | PIER Journals

2023-03-18

High Selectivity SIW Cavity Bandpass Filter Loaded CSRR with Perturbing Vias for Sub-6 GHz Applications

Namanathan Praveena,

Ms. Namanathan Praveena

National Institute of Technology

India

Homepage

Nagarajan Gunavathi

Dr. Nagarajan Gunavathi

National Institute of Technology

India

Homepage

Progress In Electromagnetics Research Letters, Vol. 109, 103-110, 2023

doi:10.2528/PIERL22122008

Abstract

A narrowband, high selectivity Substrate Integrated Waveguide (SIW) bandpass filter with perturbing vias and CSRR is proposed for Sub-6 GHz applications. Firstly, the perturbing vias are positioned at the symmetrical axis of the SIW cavity which produces distinct electric field distribution for the first two modes. Next, the ground plane is engraved with the CSRR placed at an offset distance on either side of the perturbing vias, forming the coupling arrangement that combines mixed and magnetic, electric coupling. The presence of CSRRs resulted in a narrowband filter. The filter's center frequency is 4.947 GHz with a fractional bandwidth of 1.16%. By comparing the fabricated filter to an existing SIW conventional multi-cavity or cascaded resonator, a size reduction of 117% is achieved. The simulated and measured results agree with each other.

Citation

Namanathan Praveena Nagarajan Gunavathi , "High Selectivity SIW Cavity Bandpass Filter Loaded CSRR with Perturbing Vias for Sub-6 GHz Applications," Progress In Electromagnetics Research Letters, Vol. 109, 103-110, 2023.
doi:10.2528/PIERL22122008
http://www.jpier.org/PIERL/pier.php?paper=22122008

References

Download Full Article (8) View Full Article volume