Hexagonal Fresnel zone plate antenna

A novel hexagonal Fresnel zone plate antenna is introduced and compared to the traditional circular Fresnel zone plate antenna. The comparison was carried out in simulation by using a finite-difference time-domain software. Although the circular lens performs better, the hexagonal geometry is better suited for arrays and provides the ability to both improve the sidelobe level and shift the sidelobe location away from boresight. This is accomplished by appropriately rotating the rings that make up the lens and is achieved without sacrificing directivity or 3dB beamwidth.

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