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Fundamentals of RF/Microwave bandpass filter design

Fundamentals of RF/Microwave bandpass filter design

Nwajana, Augustine O. ORCID: 0000-0001-6591-5269, Obi, Emenike Raymond, Ijemaru, Gerald Kelechi, Oleka, Emmanuel U. and Anthony, Destiny Chidi (2021) Fundamentals of RF/Microwave bandpass filter design. In: Nwajana, Augustine O. and Ihianle, Isibor Kennedy, (eds.) Handbook of Research on 5G Networks and Advancements in Computing, Electronics, and Electrical Engineering. IGI Global, USA, pp. 149-164. ISBN 978-1799869924 (doi:

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This chapter presents the basics of microwave bandpass filter design for 5G network applications. The chapter serves as a reference source to microwave stakeholders with little or no filter design experience. It should help them to 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: Book Section
Uncontrolled Keywords: bandpass, channel filter, coupling, hairpin, resonator, microstrip, circuit modelling, J-inverter
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified: 01 Jun 2021 18:14

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