Effects of Fresnel lens thickness on aperture efficiency

This paper investigates the effects of varying the thickness of a phase-correcting Fresnel lens on the mismatch losses at the air-dielectric lens interfaces in an attempt to improve the overall aperture efficiency. This approach is applied to a prototype lens designed at 30 GHz. A gain variation of more than 4 dB is observed as a function of lens thickness, leading to the conclusion that this parameter should not be overlooked in the design of phase-correcting Fresnel lenses.

[1]  A. Ittipiboon,et al.  Shadow blockage effects on the aperture efficiency of dielectric Fresnel lenses , 2000 .

[2]  Hristo D. Hristov,et al.  Fresnal Zones in Wireless Links, Zone Plate Lenses and Antennas , 2000 .

[3]  Stephen K. Barton,et al.  Fresnel Zone Antennas , 2002 .

[4]  A. Petosa,et al.  Shadow blockage improvement using a perforated dielectric Fresnel lens , 2003, IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450).

[5]  M.H.A.J. Herben,et al.  The scan performance of the fresnel-zone plate antenna: A comparison with the parabolic reflector antenna , 1993 .

[6]  James C. Wiltse,et al.  Fresnel zone plate antennas at millimeter wavelengths , 1991 .

[7]  H.D. Hristov.  The multi-dielectric fresnel zone-plate antenna-a new candidate for DBS reception , 1996, IEEE Antennas and Propagation Society International Symposium. 1996 Digest.

[8]  M. Cuhaci,et al.  Dual-polarized lens antenna for LMCS applications , 2000, Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000].

[9]  A. Petosa,et al.  Design and performance of a perforated dielectric fresnel lens , 2003 .