Vol. 46

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Optimized Design of W-Band Quasi-Optical Lens by Using Optical Simulator and Numerical Analysis

By Qike Chen, Yong Fan, and Kaijun Song
Progress In Electromagnetics Research M, Vol. 46, 173-181, 2016


A large aperture quasi-optical dielectric lens antenna for passive imaging at W-band frequency is proposed. The lens is designed to obtain best resolution at a designate distance of 3.5 m from it. The lens has biconvex aspheric surface to achieve low aberration. The initial parameters of the optical path are obtained with Gaussian beam method, and then the optical simulator ZEMAX is applied to optimize the shape of the lens which improves design efficiency greatly. A hybrid numerical method is used to analyze near field distribution of the lens, and the final design of the lens is evaluated and determined by the results. The method is the combining of ANSOFT HFSS software, ray tracing method and integration algorithm based on Huygens' Principle. It is feasible and efficient for the analysis of various lens antennas, such as large aperture lens antennas which are difficult to be simulated by commercial electromagnetic simulation software. The lens is fabricated with HDPE. Experimental results show that its 3 dB beam size is 29 mm at distance of 3.5 m, which is in good agreement with theoretical calculation. The measured patterns on the image plane show that the lens has 0.3 dB decrease of field intensity in field view of 690 mm. Imaging result shows that the lens is a good candidate for focal plane imaging.


Qike Chen, Yong Fan, and Kaijun Song, "Optimized Design of W-Band Quasi-Optical Lens by Using Optical Simulator and Numerical Analysis," Progress In Electromagnetics Research M, Vol. 46, 173-181, 2016.


    1. Yujiri, L., M. Shoucri, and P. Moffa, "Passive millimeter wave imaging," IEEE Microwave Magazine, Vol. 4, No. 3, 39-50, 2003.

    2. Stanko, S., et al., "Active and passive mm-wave imaging for concealed weapon detection and surveillance," The 33rd International Conference on Infrared, Millimeter and Terahertz Waves, 1-2, 2008.

    3. Pati, P. and P. Mather, "Open area concealed weapon detection system," Proceeding of SPIE 8017, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVI, 801702-1-801702-9, Orlando, 2011.

    4. Shi, X. and M. H. Yang, "Development of passive millimeter wave imaging for concealed weapon detection indoors," Microwave and Optical Technology Letters, Vol. 56, No. 7, 1701-1706, 2014.

    5. Sato, S., et al., "Passive millimeter-wave imaging for security and safety applications," Proceedings of SPIE 7671, Terahertz Physics, Devices, and Systems, 76710V-1-76710V-11, 2010.

    6. Kim, W. G., et al., "Characteristic analysis of aspheric quasi optical lens antenna in millimeter-wave radiometer imaging system," Applied Optics, Vol. 52, No. 6, 1122-1131, 2013.

    7. Thakur, J. P., W.-G. Kim, and Y.-H. Kim, "Large aperture low aberration aspheric dielectric lens antenna for W-band quasi optics," Progress In Electromagnetics Research, Vol. 103, 57-65, 2010.

    8. Qiu, J., Z. Zhuang, X. Han, and F. Xie, "Design of quasi-optical subsystem for millimeter-wave imaging system," International Symposium on Antennas Propagation & Em Theory, 530-533, 2008.

    9. Volkov, P. V., et al., "Aspherical single-lens objective for radio-vision systems of the millimeter-wavelength range," Technical Physics, Vol. 59, No. 4, 588-593, 2014.

    10. Richter, J., A. Hofmann, and L. P. Schmidt, "Dielectric wide angle lenses for millimeter-wave focal plane imaging," European Microwave Conference, 1-4, 2001.

    11. Goldsmith, P. F., "Quasi-optical techniques," Proceedings of the IEEE, Vol. 80, No. 11, 1729-1747, 1992.

    12. Goldsmith, P. F., Quasi Optical Systems: Gaussian Beam Quasi Optical Propagation and Applications, 130-133, IEEE Press/Chapman & Hall Publishers, Piscataway, 1998.

    13. Zhang, Y., J. Wang, Z. Zhao, and J. Yang, "Numerical analysis of dielectric lens antennas using a ray-tracing method and HFSS software," IEEE Antennas & Propagation Magazine, Vol. 50, No. 4, 94-101, 2008.

    14. Kim, W.-G., N.-W. Moon, J. Kang, and Y.-H. Kim, "Loss Measuring of large aperture quasi-optics for W-band imaging radiometer system," Progress In Electromagnetics Research, Vol. 125, 295-309, 2012.

    15. Lee, S.-W., M. S. Sheshadri, V. Jamnejad, and R. Mittra, "Refraction at a curved dielectric interface: geometrical optics solution," IEEE Transactions on Microwave Theory and Techniques, Vol. 82, No. 1, 12-19, 1982.