NDLI: Design of a narrow dual-band BPF with an independently-tunable passband

Content Provider	IET Digital Library
Author	Mousavi, S. M. H. Makki, S. V. A. Alirezaee, Sh. Malakooti, S. A.
Abstract	Using polygonal resonators and bended lines, a new type of dual-band bandpass filter (BPF) is presented generating a fixed passband centred at 2.70 (f 01) and an independently-electronically tunable passband (f 02) which can be tuned between 3.65 and 6.51 GHz (56% tuning range). The measured results indicate that the return losses of both passbands are >21 dB throughout the tuning range. Furthermore, the use of bended lines leads to extremely small size of 0.136 × 0.098 λ g 2 , where λ g is the guided wavelength at the lowest working frequency (f 01). The proposed BPF also benefits from an ultra-wide upper stopband from 7.03 up to 14.41 GHz (based on 21 dB points), suppressing unwanted signal by more than 21 dB considered as a positive point. The filter prototype is investigated in four design stages with the LC analysis to support the design process theoretically and fabrication results to validate the design practically.
Starting Page	542
Ending Page	543
Page Count	2
ISSN	00135194
Volume Number	55
e-ISSN	1350911X
Issue Number	Issue 9, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/55/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2019.0562
Journal	Electronics Letters
Publisher Date	2019-03-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Band-pass Filter Band-stop Filter Bended Line Design Process Dual-band Bandpass Filter Filter Prototype Fixed Passband Frequency 2.70 GHz Frequency 3.65 GHz to 6.51 GHz Frequency 7.03 GHz to 14.41 GHz Guided Wavelength Independently-tunable Passband LC Analysis Lowest Working Frequency Microwave Filter Microwave Resonator Narrow Dual-band BPF Design Passive Filter Passive Network Polygonal Resonator Resonator Filter Return Loss Ultra-wide Upper Stopband Unwanted Signal Suppression Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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