LAUSR

Substrate integrated waveguide (SIW) structure is the candidate for many application in microwave, terahertz and millimeter wave. It because of SIW structure can integrate with anykind component in one substrate than others structure. The one of kind components using SIW structure is a filter component specialy bandpass filter. This research proposed SIW bandpass filter using square open loop resonator for giving more selectivity of filter. It can be implemented for short range device application in frequency region 2.4 - 2.483 GHz. Two types of SIW bandpass filter are proposed. First, SIW bandpass filter is proposed using six square open loop resonators while second SIW bandpass filter used eight square open loop resonators. The simulation results for two kinds of the proposed square open loop resonators have insertion loss values below 2 dB and return loss more than 10 dB. Fabrication of the proposed two kind filters was validated by VNA. The measurement results for six square open loop resonators have 1.32 dB at 2.29 GHz and return loss more than 18 dB at 2.26 GHz – 2.32 GHz. While the measurement results has good agreement for eight square open loop resonators. Its have insertion loss below 2.2 dB at 2.41 – 2.47 GHz and return loss 16.27 dB at 2.38 GHz and 11.5 dB at 2.47 GHz.