Compact microstrip reconfigurable filter based on spiral resonators

• Published in: Microwave and optical technology letters Vol. 61; no. 2; pp. 417 - 424
• Main Authors: Donelli, Massimo, Manekiya, Muhammedhusen, Menon, Sreedevi K.
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 01-02-2019; Wiley Subscription Services, Inc
• Subjects: Deactivation; Diodes; microstrip planar circuits; microwave devices; microwave tunable filters; optimization algorithm; PIN diodes; Reconfiguration; Resonators; spiral resonators; Switches
• ISSN: 0895-2477; 1098-2760
• DOI: 10.1002/mop.31587

In this work, the design of a reconfigurable stop‐band filter based on a set of spiral microstrip resonators is proposed. In particular, a set of spiral resonators able to reject different Wi‐Fi channels are activated or deactivated by means of electronic switches based on pin diodes. A filter prototype composed of five resonating elements and coupled with a microstrip was fabricated and experimentally assessed. Good performances have been verified experimentally, with reference to the filter reject capabilities. The numerical and experimental results are in good agreement.