Design of Quasi-Optical Lens Antenna for W-Band Short Range Passive Millimeter-Wave Imaging

Qike Chen, Yong Fan, Jingshi Zhou, Kaijun Song

Fundamental Science on EHF Laboratory, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, China.

DOI: 10.4236/jcc.2015.33016                

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.

Keywords

Quasi-Optical Lens, Passive Millimeter-Wave Imaging, Numerical Method, Huygens’ Principle

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Yujiri, L., Shoucri, M. and Moffa, P. (2003) Passive Millimeter Wave Imaging. IEEE Microwave Magazine, 4, 39-50. http://dx.doi.org/10.1109/MMW.2003.1237476
[2]	Goldsmith, P.F., Hsieh, C.T., Huguenin, G.R., Kapitzky, J. and Moore, E.L. (1993) Focal Plane Imaging Systems for Millimeter Wavelengths. IEEE Transactions on Microwave Theory and Techniques, 41, 1664-1675. http://dx.doi.org/10.1109/22.247910
[3]	Pati, P. and Mather, P. (2011) Open Area Concealed Weapon Detection System. Proceedings. of SPIE 8017, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVI, 8017, 801702-1-801702-9; http://dx.doi.org/10.1117/12.883879
[4]	Stanko, S., Notel, D., Wahlen, A., Huck, J., Kloppel, F., Sommer, R. et al. (2008) Active and Passive mm-Wave imaging for Concealed Weapon Detection and Surveillance. 33rd International Conference on Infrared, Millimeter and Terahertz Waves, Pasadena, 15-19 September 2008, 1-2. http://dx.doi.org/10.1109/ICIMW.2008.4665741
[5]	Kim, W.-G., Moon, N.-W., Singh, M. K., Kim, H.-K. and Kim, Y.-H. (2013) Characteristic Analysis of Aspheric Quasi Optical Lens Antenna in Millimeter-wave Radiometer Imaging System. Applied Optics, 52, 2 1122-1131. http://dx.doi.org/10.1364/AO.52.001122
[6]	Sato, H., Sawaya, K., Mizuno, K., Uemura, J., Takeda, M. and Takahashi, J. (2010) Passive Millimeter-wave Imaging for Security and Safety Applications. Proceedings of SPIE 7671, Terahertz Physics, Devices, and Systems, 7671, 26 April 2010, 76710V-1-76710V-11. http://dx.doi.org/10.1117/12.849491
[7]	Thakur, J.P., Kim, W.-G. and Kim, Y.-H. (2010) Large Aperture Low Ab-erration Aspheric Dielectronic Lens Antenna for W-Band Quasioptics. Progress In Electromagnetics Research, PIER, 103, 57-65. http://dx.doi.org/10.2528/PIER10022404
[8]	Tuovinen, J., Hirvonen, T.M. and Raisanen, A.V. (1992) Near-Field Analysis of a Thick Lens and Horn Combination: Theory and Measurements. IEEE Transactions on Antennas and Propagation, 40, 613-619. http://dx.doi.org/10.1109/8.144594