Design and comparison between ring and L-shape resonators of matched bandstop filter

Effendee, Nurul Nazlinda (2022) Design and comparison between ring and L-shape resonators of matched bandstop filter. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A wireless communication system is one that transmits data between two points that are not electrically connected. While, a microwave filter is part of every RF communication system’s front-end. Noise is big challenge when developing a wireless communication systems or any other microwave-based system. Filtering techniques are one method of preventing noise. At center frequencies of 90MHz, matched band-stop filter were designed in this research using Ring and L-shape resonators. When developing matched band-stop filter, it is challenging to attain a high Q-factor due to the lossy nature of the microstrip. The objectives of this project are to design, simulate, compare and analyze the matched band-stop filter’s return loss, insertion loss, and efficiency by utilized Advanced Design System (ADS) software. As an outcome, the ring’s return loss and insertion loss are -3.711dB and -9.363dB, respectively, whereas the L-shape return loss and insertion loss are -5.130dB and -12.301dB, showing that the L-shape resonator has a high Q-factor 0.034 than the ring resonator 0.026. So, L-shape resonator have narrower attenuation and are more efficient.

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