AbstractThis Letter deals with wire antennas radiating in the vicinity of an impedance surface. The use of impedance surfaces has been suggested, for instance, in the context of antenna reflectors. In this Letter a numerical surface impedance model is introduced. Some radiation patterns are calculated to validate the model. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 38–40, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10366