Substrate Integrated Waveguide Bandpass Filter using Complementary Split Ring Resonator for Short Range Device Applications

Bandpass filter is an essential component to reduce interference between adjacent wireless communications. Most researchers prefer to use the microstrip filter because of the low-cost fabrication process, lightweight and compact component. The substrate integrated waveguide (SIW) is put together with complementary split ring resonator (CSRR) method to realize the compact filter component. This paper presents the SIW bandpass filter for short range device (SRD) application which is applied at 2.44 GHz frequency center. The SIW bandpass filter with CSRR is designed and fabricated using Ansys HFSS and Rogers RO 3210. From the simulation and measurement results, there is a discrepancy as both of them state that the insertion loss is below 1.5 dB and the return loss is higher than 9 dB.