A cognitive compensation mechanism for deformable antennas

Stephen A. Long, Gregory H. Huff

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

1 Scopus citations


This work presents the design, theory, and measurement of a linearly polarized microstrip patch antenna with a substrate-integrated compensation mechanism to mitigate the detuning effects from a physical deformation (e.g., bending and twisting). In particular, we investigate the ability of an antenna to maintain its impedance bandwidth as it bends sharply through the center (from flat up to 90° pivoted about the ground plane). Compensation for this bending occurs through the displacement of electromagnetically functionalized colloidal dispersions (EFCDs) in a substrateembedded capillary. By replacing a high permittivity EFCD with a low permittivity EFCD during bending this provides a net length reduction to oppose the length extension (stretching) from the bending action. Stability of the 2:1 VSWR (matched impedance) bandwidth has been examined numerically across the entire range of bending, and examined experimentally using fixed-bend patch antennas on 4 mm thick isiocane foam substrates (one flat patch and one patch ent to 90°) to demonstrate this concept. A deformable patch antenna fabricated on a silicone substrate with conductive astomers has also been examined and trends between simulated and measured results are in good agreement.

Original languageEnglish (US)
Title of host publicationBehavior and Mechanics of Multifunctional Materials and Composites 2009
StatePublished - 2009
EventBehavior and Mechanics of Multifunctional Materials and Composites 2009 - San Diego, CA, United States
Duration: Mar 9 2009Mar 12 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherBehavior and Mechanics of Multifunctional Materials and Composites 2009
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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