Holographic artificial impedance surfaces for conformal antennas

We have developed a method for generating arbitrary radiation patterns from antennas on complex objects. The object is coated with an artificial impedance surface consisting of a lattice of sub-wavelength metal patches on a grounded dielectric substrate. The effective surface impedance depends on th...

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Bibliographic Details
Main Authors: Sievenpiper, D., Colburn, J., Fong, B., Ottusch, J., Visher, J.
Format: Conference Proceeding
Language:English
Subjects:
Antenna radiation patterns
Antennas and propagation
Dielectric substrates
Electromagnetic scattering
Holography
Interference
Lattices
Optical scattering
Optical surface waves
Surface impedance
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Summary:We have developed a method for generating arbitrary radiation patterns from antennas on complex objects. The object is coated with an artificial impedance surface consisting of a lattice of sub-wavelength metal patches on a grounded dielectric substrate. The effective surface impedance depends on the size of the patches, and can be varied as a function of position. Using holography, the surface impedance is designed to generate any desired radiation pattern from currents in the surface. With this technique we can create antennas with novel properties such as radiation toward angles that would otherwise be shadowed
ISSN:1522-3965
1947-1491
DOI:10.1109/APS.2005.1551536