Transparent thin film antenna

Communications: radio wave antennas – Antennas – With vehicle

Reexamination Certificate

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C343S711000, C343S767000

Reexamination Certificate

active

11207512

ABSTRACT:
A method for improving the efficiency of antennas having transparent thin-film conductive surfaces, and antennas improved by the method are disclosed. For a selected frequency of antenna operation, values for surface current density in areas distributed over the surface of the thin-film are determined. Regions of the surface containing areas having concentrated current flow are identified based upon the determined values of current density. Antenna efficiency is improved by increasing conductivity in areas of the thin-film surface found to have concentrated current flow. The method enables the improvement of the efficiency of antennas having transparent thin-film conducting surfaces, without unnecessarily obstructing the optical view through the thin-film surfaces of the antennas.

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R.N. Simons and R. Q. Lee, “Feasibility Study of Optically Transparent Microstrip Patch Antenna”, IEEE Antennas and Propagation Society International Symposium 1997 Digest, Montreal, Quebec, Jul. 14-18, 1997, vol. 4, pp. 2100-2103.
K. Oshima et al., “Use of a Transparent Conductive Thin-film on a Glass Substrate in Active Integrated Antenna Arrays with Double Strong Coupling”, IEEE MTT-S Digest, 2002, pp. 1569-1572.
Simons et al., “Finite Width Coplanar Waveguide Patch Antenna with Vertical Fed Through Connect”, NASA Technical Memorandum 107136, prepared for 1996 IEEE AP-S International Symposium and URSI Radio Science Meeting Cosponsored by IEEE, AP-S, and U.R.S.I., Baltimore, Maryland, Jul. 16-21, 1996, pp. 1-6.

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