| CPC G01S 13/887 (2013.01) [G01S 7/025 (2013.01); G01S 7/41 (2013.01); G01S 13/86 (2013.01); G01S 13/89 (2013.01); G01S 13/9064 (2019.05)] | 14 Claims |
|
1. A security screening device, comprising:
a portal, said portal comprising two electronically connected side pillars (100), said portal forming an inspection area (120),
each one of said two side pillars comprising a linear array of two or more millimeter-wave emitters (101), a linear array of two or more millimeter-wave receivers (102), a data acquisition processor (106) and an imaging processor (107),
said two or more millimeter-wave emitters being configured to transmit cyclic broadband radio wave signals towards said inspection area searching for a concealed item (22) hidden on a moving target (21),
each emitter from the linear array of emitters being configured to cyclically scan a range with bandwidth 5-20 GHz within 10-50 microseconds;
said two or more receivers being configured to sense said cyclic broadband radio wave signals emitted by said two or more millimeter-wave emitters, said cyclic broadband radio wave signals being direct signals unimpacted by the moving target, signals transmitted through the moving target and signals that are reflected back after impacting the moving target;
said two or more receivers being configured to send sensed signals to the data acquisition processor (106) located in the same pillar then the data acquisition processor sends data to the imaging processor (107) located in the same pillar, said imaging processor configured to provide one or more 2-dimensional images (25) of said moving target based on processing of said unimpacted direct signals and said signals transmitted through the moving target and said reflected signals; said one or more 2-dimensional images having optical path length resolution of better than 2 cm; and
a calculation processor (109) configured to select one or more sections of said one or more 2-dimensional images, said one or more sections corresponding to the concealed item of interest.
|