Forward-Nulling Passive Millimeter Wave Imaging Using Cooling Dielectric Tube

Hiroyasu SATO  Kohei KURIYAMA  Kunio SAWAYA  

IEICE TRANSACTIONS on Electronics   Vol.E95-C   No.10   pp.1627-1634
Publication Date: 2012/10/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.1627
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
passive millimeter wave imaging (PMMW),  incoherent,  cooling dielectric tube,  parabolic cylinder,  noise source,  

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In order to improve the detection performance in passive millimeter-wave (PMMW) imaging, a new method forwarding a null in the direction of human body and objects is proposed. The forward-nulling PMMW imaging using a dielectric tube occupied by cooling water placed near the focus line of a parabolic cylinder are performed. It is shown experimentally that the contrast between human body and conducting objects such as a conducting plate and a conducting sphere is improved by the presence of the cooling dielectric tube and parabolic cylinder.