Printed Ka-band Reflectarray with Offset Feed
Printed reflectarrays combine the advantages of reflector antennas with microstrip arrays, yielding low-profile, low-cost antennas with simpler feeds that are easy to fabricate.
The electrically large structure of the reflectarray antenna makes a full-wave analysis very challenging. Alternative analysis techniques can be verified through comparison with accurate full-wave simulation results. The multilevel fast multipole method in FEKO is a suitable solver for this kind of problem with a large number of unknowns.
Drs Elsherbeni, Yang and Nayeri from the University of Mississippi have investigated various design approaches for reflectarrays [1-4]. They designed the Ka-band reflectarray antennas pictured below for an operating frequency of 32 GHz.
 P. Nayeri, F. Yang, and A. Z. Elsherbeni, “Radiation analysis approaches for reflectarray antennas,” IEEE Antennas Propag. Magazine, vol. 55, no. 1, pp. 127–134, Feb. 2013.
 P. Nayeri, F. Yang, and A. Z. Elsherbeni, “Radiation analysis of reflectarray antennas: numerical approaches versus full-wave simulations,” presented at the National Radio Science Meeting, Colorado, U.S., Jan. 2012.
 P. Nayeri, A. Z. Elsherbeni, and F. Yang, “Design, full-wave analysis, and near-field diagnostics of reflectarray antennas,” ACES Journal, vol. 28, no. 4, pp. 284–292, Apr. 2013.
 P. Nayeri, A. Z. Elsherbeni, and F. Yang, “Design, full-wave simulation, and near-field diagnostics of reflectarray antennas using FEKO electromagnetic software,” presented at the 28thInternational Review of Progress in Applied Computational Electromagnetics, Ohio, U.S., April 2012.