Improved zoning rule for designing square Fresnel zone plate lenses

Abstract

Abstract An improved zoning rule is presented for designing a square Fresnel zone plate lens (FZPL). This new rule results in a higher gain when the FZPL is used as an antenna element or can enhance the focusing properties of the square FZPL when used to collimate an incident plane wave. The derivation of this improved zoning rule is presented along with simulated results for some typical cases. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 276–278, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22108