TITLE:
Design of Quasi-Optical Lens Antenna for W-Band Short Range Passive Millimeter-Wave Imaging
AUTHORS:
Qike Chen, Yong Fan, Jingshi Zhou, Kaijun Song
KEYWORDS:
Quasi-Optical Lens, Passive Millimeter-Wave Imaging, Numerical Method, Huygens’ Principle
JOURNAL NAME:
Journal of Computer and Communications,
Vol.3 No.3,
March
18,
2015
ABSTRACT: A quasi-optical dielectric lens used for
W-band focal plane array passive imaging has been developed. The imaging system
requires the lens to form beam spot with 3 dB width less than 35 mm at distance
of 3500 mm. The powerful optical design software ZEMAX was utilized to design
the contours of the lens, and numerical method based on ray tracing and Huygens’
Principle was processed to verify the design result. Measurement result shows
that the 3 dB width of the beam spot formed by the lens is 34 mm at distance of
3460 mm, and the beam pattern on imaging plane are equally arranged and the
intensity decreases only 0.55 dB while the object lateral deviation increases
to 300 mm.