Waveguide-Fed Tunable Metamaterial Element for Dynamic Apertures

Timothy Sleasman, Mohammadreza F. Imani, Wangren Xu, John Hunt, Tom Driscoll, Matthew S. Reynolds, David R. Smith

Research output: Contribution to journalArticlepeer-review

100 Scopus citations


We present the design of a tunable metamaterial element that can serve as the building block for a dynamically reconfigurable aperture. The element - a complimentary electric-LC (cELC) resonator - is patterned into the upper conductor of a microstrip transmission line, providing both a means of exciting the radiating metamaterial element as well as independent access for biasing circuitry. PIN diodes are connected across the capacitive gaps of the cELC, and a dc bias current is used to switch the junction between conducting and insulating states. The leakage of RF signal through the bias line is mitigated by integration of a radial decoupling stub. The proposed design and operation of the element are demonstrated through full-wave electromagnetic simulations. We discuss the potential application of the cELC element as a building block for metamaterial apertures capable of dynamic beamforming, imaging, or security screening applications.

Original languageEnglish (US)
Article number7173427
Pages (from-to)606-609
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
StatePublished - 2016
Externally publishedYes


  • Aperture antennas
  • metamaterials
  • tunable circuits and devices

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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