Analysis and Evaluation of Fresnel Zone Antenna Designs

Volume 13 , Issue 1 , January 2010 , Pages 71-80

Authors

¹ Sulaimani Technical College,Sulaimani, Kurdistan

² College of Engineering, University of Al-Nahrain

This paper presents an analysis and evaluation of two designs of flat aperture antenna based on

Huygen's principle and Fresnel diffraction theory ; therefore, this antenna type is called Fresnel zone

plate antenna. The two designs include Soret and Wood types which are different in shape, design

procedure and the manufacturing techniques; thus in radiation characteristics. Using the exact solution,

the radii of Fresnel zones (rings), directive gain and aperture efficiency of the antenna designs are

calculated and the radiation patterns are obtained. It is found that the antenna with odd zones is better in

radiation characteristics than the antenna with even zones. It is also determined that the focusing

efficiency of Wood antenna design is very good and four times higher than that of Soret type. The

obtained results from the two antenna designs are discussed and evaluated.

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