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Liquid crystal tunable microstrip patch antenna

Liquid crystal tunable microstrip patch antenna

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© The Institution of Engineering and Technology
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A microstrip patch antenna operating in the 5 GHz range and tuned by liquid crystal (LC) is described. The simulated tuning range is 8% while the measurements showed a range of 4%. Losses in the commercially available LC material at these frequencies give rise to antenna efficiencies ranging from 35–40% at best and falling to around 20% when the LC is in the unbiased state.

Inspec keywords: microwave antennas; microstrip antennas; liquid crystal devices

Other keywords: unbiased state; liquid crystal tunable microstrip patch antenna; frequency 5 GHz; LC material

Subjects: Single antennas; Liquid crystal devices

References

    1. 1)
    2. 2)
    3. 3)
      • Martin, N., Laurent, P., Person, C., Gelin, P., Huret, F.: `Patch antenna adjustable in frequency using liquid crystal', Eur. Microw. Conf., October 2003, Munich, Germany, p. 699–702.
    4. 4)
    5. 5)
      • R.J. Langley , K.K. Tsang . Design of circular microstrip patch antennas on ferrite substrates. IEE Proc., Microw. Antennas Propag. , 1 , 49 - 55
    6. 6)
    7. 7)
      • S. Mueller , A. Penirschke , C. Damm , P. Scheele , M. Wittek , C. Weil , R. Jakoby . Broad-band microwave characterization of liquid crystals using a temperature-controlled coaxial transmission line. IEEE Trans. Microw. Theory Tech. , 6
    8. 8)
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