Scalar and Tensor Holographic Artificial Impedance Surfaces

• Published in: IEEE transactions on antennas and propagation Vol. 58; no. 10; pp. 3212 - 3221
• Main Authors: Fong, Bryan H, Colburn, Joseph S, Ottusch, John J, Visher, John L, Sievenpiper, Daniel F
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Applied classical electromagnetism; Applied sciences; Arrays; artificial materials; Control surfaces; Dielectric substrates; Dielectrics; Diffraction, scattering, reflection; Electromagnetic propagation; Electromagnetic radiation; Electromagnetic scattering; Electromagnetic wave propagation, radiowave propagation; Electromagnetism; electron and ion optics; Exact sciences and technology; Fundamental areas of phenomenology (including applications); holographic gratings; Holography; Impedance; impedance sheets; Mathematical analysis; Physics; Polarization; Radiocommunications; Radiowave propagation; Scalars; Shape control; Surface impedance; Surface waves; Telecommunications; Telecommunications and information theory; Tensile stress; Tensors; Wave propagation; Electromagnetic wave scattering; Surface impedance; Circular polarization; Complex shape; impedance sheets; artificial materials; Implementation; Holographic gratings; Dielectric substrate; Surface waves; Electromagnetic wave propagation; Electromagnetic waves; Wave scattering; Antennas; electromagnetic scattering
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2010.2055812

We have developed a method for controlling electromagnetic surface wave propagation and radiation from complex metallic shapes. The object is covered with an artificial impedance surface that is implemented as an array of sub-wavelength metallic patches on a grounded dielectric substrate. We pattern the effective impedance over the surface by varying the size of the metallic patches. Using a holographic technique, we design the surface to scatter a known input wave into a desired output wave. Furthermore, by varying the shape of the patches we can create anisotropic surfaces with tensor impedance properties that provide control over polarization. As an example, we demonstrate a tensor impedance surface that produces circularly polarized radiation from a linearly polarized source.