Vasistha, Anup Raju, Mahadevaswamy, Chandramouli H., Ebenuwa, Solomon H. and Nwajana, Augustine O. ORCID: https://orcid.org/0000-0001-6591-5269 (2025) Chapter 3. Investigating single-to dual-band bandpass filter transformation for wireless communication systems. In: Nwajana, Augustine O. ORCID: https://orcid.org/0000-0001-6591-5269, (ed.) RFID, Microwave Circuit, and Wireless Power Transfer Enabling 5/6G Communication. IGI Global Scientific Publishing, Hershey PA, USA, pp. 71-86. ISBN 979-8369387993; 979-8369388006; 979-8369388013 (doi:10.4018/979-8-3693-8799-3.ch003)

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Abstract

A simple technique for transforming a single-band bandpass filter (BPF) into a dual-band BPF is presented in this chapter. The method starts with a 2nd-order single-band BPF design, giving rise to a 4th-order dual-band BPF after the proposed transformation. Both filters are implemented using compact U-shaped microstrip resonator for improved device miniaturization. The proposed work features a centre frequency of 1.4 GHz for the single-band BPF, with a 3.4% fractional bandwidth. The dual-band BPF operates at 1.35 and 1.45 GHz for the first and second bands, respectively. The design implementation employs the commercially available Rogers RT/Duroid 6010LM substrate, having a dissipation factor of 0.0023, dielectric constant of 10.7, and thickness of 1.27 mm. The practical responses of the prototype dual-band BPF indicate a good return loss of better than 18 dB across both bands, and an insertion loss of better than 0.1 dB. The design prototype achieved physical size of 0.23 x 0.18 λg. λg is the guided wavelength for the microstrip line impedance at the centre frequency of the filter.

Item Type:	Book Section
Uncontrolled Keywords:	single-band, dual-band, filter transformation
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science T Technology > T Technology (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Computing & Mathematical Sciences (CMS) Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	21 Feb 2025 12:58
URI:	http://gala.gre.ac.uk/id/eprint/49801

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