Printed holey plate Luneburg lens

A printed Luneburg lens whose permittivity distribution is controlled by photo lithographically etching holes of different sizes into one side of a PCB ground plane is reported. The lens designed to operate in TE₀₁ mode has a measured −3-dB beamwidth of 5.2° with 14.2-dB gain at 27.22 GHz for a 12.2λ, 13.4-cm diameter lens. Its low profile, 3.175-mm thickness, 85 g, ±20° scanning range, and 15% bandwidth makes it useful for land mobile telemetry and vehicular applications in the millimeter waveband. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 378–380, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23087