NDLI: Compact customisable bandstop-bandpass-bandstop cascaded filter based on substrate integrated waveguide coax cavities

Content Provider	IET Digital Library
Author	Hung, Shang Yu Li, Guann Pyng Guo, Yu
Abstract	This study presents a highly customisable bandpass filter based on standard printed circuit board (PCB) material and process. Such a filter utilises cascaded bandstop-bandpass-bandstop (BS-BP-BS) topology. There is one substrate integrated waveguide (SIW) coax resonator in each bandstop section, whereas there are three SIW coax resonators in the bandpass section. The coax resonators are built by SIW vias, and the resonant frequency of each resonator is determined by the lumped capacitors mounted on the top side of the filter. While the bandpass section of the filter provides a necessary passband response, the bandstop sections that cascade on both sides of the filter introduce an optional notch to the spectrum. Furthermore, with additional sets of plated-through vias purposefully placed between resonators, reconfiguring the bandwidth of the passband is achievable through changing the lumped capacitors mounted on the bottom side of the vias of the filter. Measured results show centre frequency, notch frequency, and bandwidth are individually configurable, and such configurations are very intuitive and predictable. To the best of our knowledge, the proposed design is the first single layer PCB SIW coax filter deploying BS-BP-BS topology that has a configurable centre frequency, flexible 3-dB bandwidth as well as predefine transmission zero.
Starting Page	281
Ending Page	292
Page Count	12
ISSN	17518725
Volume Number	14
e-ISSN	17518733
Issue Number	Issue 4, Mar (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/14/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2019.0317
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2020-02-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Band-pass Filter Band-stop Filter Bandpass Section Bandtop Section Bandtop-bandpass-bandstop Cascaded Filter Bandtop-bandpass-bandstop Topology BS-BP-BS Topology Cavity Resonator Filter Lumped Capacitor Passive Filter Passive Network PCB SIW Coax Filter Plated-through Vias Printed Circuit Printed Circuit Board Material Printed Circuit Board Process Resonant Frequency SIW Coax Resonator Substrate Integrated Waveguide Substrate Integrated Waveguide Coax Cavities Substrate Integrated Waveguide Coax Resonator Waveguide And Microwave Transmission Line Waveguide And Microwave Transmission Line Component Waveguide Filter
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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