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A step-by-step approach to bandpass/channel filter design

A step-by-step approach to bandpass/channel filter design

Nwajana, Augustine ORCID: 0000-0001-6591-5269 (2021) A step-by-step approach to bandpass/channel filter design. International Journal of Electronics, Communications, and Measurement Engineering, 10 (2):1. pp. 1-14. ISSN 2578-7551 (Print), 2578-7543 (Online) (doi:

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This paper presents a step-by-step approach to the design of bandpass/channel filters. The paper serves as a reference source to microwave stakeholders with little or no filter design experience. It should help them design and implement their first filter device using the microstrip technology. A 3-pole Chebyshev bandpass filter (BPF) with centre frequency of 2.6 GHz, fractional bandwidth of 3%, passband ripple of 0.04321 dB and return loss of 20 dB has been designed, implemented, and simulated. The designed filter implementation is based on the Rogers RT/Duroid 6010LM substrate with a 10.7 dielectric constant and 1.27 mm thickness. The BPF was also fabricated using the same substrate material used for the design simulation. The circuit model and microstrip layout results of the BPF are presented and show good agreement. The microstrip layout simulation results show that a less than 1.8 dB minimum insertion loss and a greater than 25 dB in-band return loss were achieved. The overall device size of the BPF is 18.0 mm by 10.7 mm, which is equivalent to 0.16λg x 0.09λg, where λg is the guided wavelength of the 50 Ohm microstrip line at the filter centre frequency.

Item Type: Article
Uncontrolled Keywords: bandpass, channel filter, coupling, hairpin, resonator, microstrip, circuit modelling, J-inverter
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > School of Engineering (ENG)
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Last Modified: 17 Feb 2022 12:03

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