Frequency-agile field-programmable filter array (FPFA) with multiple functionalities

Juseop Lee, Eric J. Naglich, Hjalti H. Sigmarsson, Dimitrios Peroulis, William J. Chappell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


This paper demonstrates the concept of a field-programmable filter array which can be configured in the field after fabrication. The proposed array is composed of tunable resonators and can have multiple functionalities by rerouting signals from input ports to output ports. Signal rerouting can be achieved by controlling the inter-resonator coupling with a wide tuning ratio of coupling coefficients. The inter-resonator coupling structure presented in this paper is designed to have both positive and negative coupling values. The presented coupling structure has a large tuning ratio so that both large coupling and large isolation between two resonators can be obtained. A unit cell of the proposed field-programmable filter array was fabricated to prove the proposed concept. It is shown that the unit cell can be adjusted to have second-order bandpass responses, third-order bandpass responses, and fourth-order bandpass responses. The unit cell can also be operated as a switchable filter bank without a switch. All operation modes are verified by measurement.

Original languageEnglish
Title of host publication2011 IEEE MTT-S International Microwave Symposium, IMS 2011
Publication statusPublished - 2011
Externally publishedYes
Event2011 IEEE MTT-S International Microwave Symposium, IMS 2011 - Baltimore, MD, United States
Duration: 2011 Jun 52011 Jun 10

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X


Other2011 IEEE MTT-S International Microwave Symposium, IMS 2011
Country/TerritoryUnited States
CityBaltimore, MD


  • cavity resonators
  • filters
  • tunable circuits and devices

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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