A technology demonstrator for a 0.5 m x 0.5 m fully electronic digital beamforming mm-Wave imaging system

This paper describes a demonstrator for a millimeter-wave imaging system, showing for the first time the feasibility of an active fully electronic imaging system in the 80 GHz region using a 2D planar sparse array as an imaging sensor. The demonstrator is capable of capturing images of living persons. In this work, the requirements regarding measurement speed are derived. The system architecture is described in detail using block diagrams. The reference channel concept, the signal distribution network, the modular architecture and the ADC / signal processing concepts are explained. Selected measurement results of key system parameters are presented. mm-Wave images of living persons are shown, including examples demonstrating the effects of movement during the measurement.

[1]  David M. Sheen,et al.  Personnel and mail screening with millimeter waves , 2005, SPIE Defense + Commercial Sensing.

[2]  Greg Lee,et al.  Millimeter-wave imaging system for personnel screening: scanning 10^7 points a second and using no moving parts , 2006, SPIE Defense + Commercial Sensing.

[3]  Lorenz-Peter Schmidt,et al.  Novel fully electronic active real-time millimeter-wave imaging system based on a planar multistatic sparse array , 2011, 2011 IEEE MTT-S International Microwave Symposium.

[4]  Lorenz-Peter Schmidt,et al.  Design of a balanced-fed patch-excited horn antenna at millimeter-wave frequencies , 2010, Proceedings of the Fourth European Conference on Antennas and Propagation.

[5]  Lorenz-Peter Schmidt,et al.  Multistatic mm-Wave Imaging with Planar 2D-Arrays , 2009, 2009 German Microwave Conference.

[6]  Lorenz-Peter Schmidt,et al.  Illumination properties of multistatic planar arrays in near-field imaging applications , 2010, The 7th European Radar Conference.