This letter proposes a concept for frequency-reconfigurable slot antennas enabled by pressure-driven capacitive microfluidic switches. The switches are operated by pneumatically displacing a plug of eutectic gallium indium alloy (EGaIn) within an air-filled microchannel that traverses the slot orthogonally. Frequency reconfigurability is achieved by altering the displacement of conductive fluid within the channel, which reactively loads the slot. A transmission-line model is developed to capture the physical behavior of the fluid channel, and measurements are provided that show good agreement with the behavior of the model.

Original languageEnglish (US)
Article number6547156
Pages (from-to)828-831
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
StatePublished - 2013


  • Frequency-reconfigurable
  • microfluidic switch
  • slot antenna

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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