Investigation of integrated solid state nano-ionic metal–insulator–metal switches for electronically reconfigurable band-stop filter applications

• Published in: IET microwaves, antennas & propagation Vol. 13; no. 12; pp. 1963 - 1968
• Main Authors: Jayakrishnan, Methapettyparambu Purushothama, Vena, Arnaud, Sorli, Brice, Perret, Etienne
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 02.10.2019; Institution of Engineering and Technology
• Subjects: band‐stop filters; electrical equivalent circuit; Electromagnetism; electronically reconfigurable band‐stop filter; electronically reconfigurable band‐stop filters; electronically switchable band stop filter; Engineering Sciences; equivalent circuits; flexible substrates; integrated MIM switch; integrated solid state nanoionic metal–insulator–metal switches; microstrip filters; MIM devices; nanoionic conductive‐bridging metal–insulator–metal switches; Research Article; resonant open stub‐based band‐stop filter; shorted stub‐based band‐stop filter; time stability; MIM devices; electronically reconfigurable band-stop filter; microstrip filters; shorted stub-based band-stop filter; electronically reconfigurable band-stop filters; equivalent circuits; integrated MIM switch; electrical equivalent circuit; flexible substrates; time stability; nanoionic conductive-bridging metal–insulator–metal switches; integrated solid state nanoionic metal–insulator–metal switches; electronically switchable band stop filter; resonant open stub-based band-stop filter; band-stop filters
• ISSN: 1751-8725; 1751-8733; 1751-8733
• DOI: 10.1049/iet-map.2019.0180

A proof of concept of application of nano-ionic conductive-bridging metal–insulator–metal (MIM) switches in electronically reconfigurable band-stop filters, through design, and experimental results are presented in this article. Two similar designs of band-stop filters with a different mechanism of operation are proposed herewith. One is a microstrip, resonant open stub-based band-stop filter and the other is a microstrip tuned shorted stub-based band-stop filter. The electrical length of the stubs in both these devices are tuned by an integrated MIM switch forcing them to resonate at different frequencies and thus achieving electronically switchable band stop filtering characteristics. Working mechanism of the devices is validated with the help of developed electrical equivalent circuit models. Analysis of time stability of switch states for 1000 min with affirmative results is also presented herewith. These devices are fabricated without any soldered electrical components and without the use of any cleanroom technologies, using proven low-cost method, and are promising to work at very low power and have the potential to be directly printed on low-cost flexible substrates like paper, for potential disposable applications.