3D W Band Baggage Screening Using the Synthetic Aperture Principle
This contribution describes the setup of a portable baggage screening system operating at millimeter waves with 94 GHz centre frequency. This frequency band offers a lot of advantages, amongst each other a low attenuation for a lot of dielectric materials, such as textiles, high resolution and low-cost GaAs based semiconductor technology. In particular, the sensors were fabricated using 100 nm InAlAs/InGaAs based depletion type metamorpbic high electron mobility transistor (MHEMT) technology. The system comprises a monostatic frequency modulated continuous wave radar that is moved two dimensionally in a plane. With this aperture, three dimensional images can be reconstructed identifying dangerous goods or objects inside of baggage. The system is proven by real measurements of a gun concealed under clothes and hidden in a suitcase. For the image processing, the synthetic aperture principle has been applied and adapted to the geometry. In order to carry out the measurements almost in real-time, a polar reformatting based approach has been implemented yielding a resolution of about 3 mm.
microwave imaging synthetic aperture radar solid state circuits luggage inspection
Sebastian Hantscher Manfred Hagelen Stefan Lang Helmut Essen Axel Tessmann
Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR 53343 Wachtberg, Germany Fraunhofer Institute for Solid State Physics IAF 79108 Freiburg, Germany
国际会议
2012 5th Global Symposium on Millimeter-Waves(2012年第五届全球毫米波会议 GSMM 2012)
哈尔滨
英文
356-360
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）