A Broadband T/R Front-End of Millimeter Wave Holographic Imaging

Yun Sun, Minghui Yang, Hengrong Cui, Minhua Chen, Yukun Zhu, Xiaowei Sun

Shanghai Institute of Micro System and Information Technology, Chinese Academy of Sciences, Shanghai, China.

DOI: 10.4236/jcc.2015.33006                

Abstract

A broadband T/R frond-end of active holographic imaging system is presented. Compact autodyne mode circuit structure front-end is adopted to achieve higher signal to noise ratio and higher reliability, which is beneficial to the after-end imagining. The factors that influence the dynamic range and the transverse resolution ratio of holographic imaging system have been analyzed. Wide-band oscillator, wide-band low noise amplifier and the tapered slot antennas are implemented to meet the requirements of the holographic imagining system. According to the measured results, the output power is uniform in the broadband working frequency. The sub-harmonic suppression is better than 25 dBc from the frequency of 28 GHz to 33 GHz. The isolation between antennas channel is greater than 20 dB. The experimental result shows that the performance of the front-end is good enough to meet the needs of active millimeter-wave holographic imaging system.

Keywords

Millimeter Wave, Broad-Band, T/R Front-End Module, Holographic Imaging

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Wang, W., Wang, X.T., Wang, W. and Fathy, A.E. (2013) Planar High-Gain Antipodal Linearly Tapered Slot Antenna for Passive Millimeter-Wave Focal Plane Array Imaging. IEEE International Symposium on Phased Array Systems & Technology, 2013, 267-271.
[2]	Lynch, J.J., Moyer, H.P. and Schaffner, J.H. (2008) Passive Millimeter-Wave Imaging Module with Preamplified Zero-Bias Detection. IEEE Transactions on Microwave Theory and Techniques, 56, 1592-1600. http://dx.doi.org/10.1109/TMTT.2008.924361
[3]	Sheen, D.M., McMakin, D.L. and Hall, T.E. (2006) Cylindrical Millimeter Wave Imaging Technique and Applications. Proc. of SPIE, 6211, 62110A, 1-10.
[4]	Sheen, D.M., McMakin, D.L. and Hall, T.E. (2001) Three-Dimensional Millimeter-Wave Imaging for Concealed Weapon Detection. IEEE Transactions, 49, 1581-1592.
[5]	Sheen, D.M., McMakin, D.L. and Hall, T.E. (2009) Active Millimeter-Wave Standoff and Portal Imaging Techniques for Personnel Screening. IEEE Conference on Technologies for Homeland Security, 2009. HST '09, 440-447.
[6]	Cao, Z.X. and Dou, W.B. (2009) A Dual Frequencies MMW Holographic Imaging System. 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009, 21-25 September 2009, 1-2.