3D Integration / Materials

Team:
Daniela Staiculescu, Trang Thai, Catherine Kruesi, Li Yang, Lara Martin

“Magic Cube” Antennas

  • Thin LCP material for cube
  • Low-cost: printed and then folded into three-dimensional shape
  • Easily re-designable for any chip input impedance to achieve conjugate impedance matching
  • Used for RFID and Wireless Sensor Node (WSN) technology
  • Omnidirectional Radiation pattern
  • Uses all six sides in antenna design
  • Meander line structure on the cube with inductive couple allows for miniaturization of the length of each side and conjugate matching
  • Planar designs can be manipulated to have similar characteristics without a directionally-specific orientation
  • In certain meander line structures, dual-band performance is achieved
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Fabricated Antenna

  • Meander line structure on the cube with inductive couple allows for miniaturization of the length of each side and conjugate matching
  • Planar designs can be manipulated to have similar characteristics without a directionally-specific orientation
  • In certain meander line structures, dual-band performance is achieved








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New Flexible Magnetic Composite Material

  • Magnetic composite
    • fabricated from 40 vol% BaCo ferrite powder in Dow Corning Sylgard 184 silicone
    • produced with a mixer at 240 rpm and 110°C for 30 minutes
  • 95% CI (Confidence Interval) for mean of εr, μr, tan δe and tan δm based on 5 measurements
  • h (substrate thickness) = 1.3 mm
  mean Lower CI Upper CI
εr 7.124 7.083 7.201
μr 2.463 2.457 2.468
tan δe 0.0017 0.0005 0.0028
tan δm 0.0391 0.0358 0.0424

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RFID tag on magnetic composite

  • Antenna designed for UHF RFID band = 480 MHz
  • Miniaturization concept proven by comparing the resonant frequency of the pure silicone design vs. composite
  • Silicone fres = 6 GHz
  • Composite fres = 480 MHz
  • Miniaturization factor = 1.25
  • For structures with ground plane even further miniaturization

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Conformal performance

  • Antenna bent for conformal performance analysis
    • Foam cylinder 54 mm in diameter
    • Slight downshift in frequency of 6 MHz
  • Medical monitoring and pharma applications

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