Title :
Wideband reflectarrays using artificial impedance surfaces
Author_Institution :
Electr. & Comput. Eng., Univ. of Massachusetts, Amherst, MA
Abstract :
The gain bandwidth of a microstrip reflectarray can be substantially improved by replacing the usual layer of near-resonant patches with a simple artificial impedance surface consisting of closely spaced electrically small patches on a grounded dielectric substrate. It is shown that this approach can lead to reflectarray gain bandwidths (1 dB) in excess of 20% with a single layer of printed elements
Keywords :
broadband antennas; electric impedance; microstrip antenna arrays; reflector antennas; artificial impedance surfaces; electrically small patches; gain bandwidth; grounded dielectric substrate; microstrip reflectarray; near-resonant patches; wideband reflectarrays;
Journal_Title :
Electronics Letters
