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An 8mm-band passive millimeter-wave imager BHU-2D has been developed by Beihang University. This imager is designed for detecting concealed weapons on human body. The imager adopts two-dimensional synthetic aperture interferometric radiometer (SAIR) technique which avoids the radiation risk to human body. Compared with scanning technique, SAIR technique(More)
A Ka-band two-dimensional synthetic aperture interferometric radiometer called BHU-2D has been developed by Electromagnetic Engineering Laboratory of Beihang University. The radiometer obtains images in real-time benefiting from the adoption of a 1bit/2level FPGA-based correlator unit. The design and implementation of the correlator unit in BHU-2D are(More)
Characteristics of toxic metal accumulation in farmland in relation to intensive chicken manure application on a regional scale was studied in this paper. Concentrations of Zn, As and Cu in manure exceeded the related standard in 66.7%, 14.3% and 16.7% of samples, respectively. Among chicken feed samples, concentrations of Zn, Cr and As exceeded the(More)
The performance of millimeter-wave active and passive components is sensitive to the discontinuities associated with the test fixtures. In order to accurately characterize the device-under-test (DUT) and obtain the DUT only performance, the fixture effects must be removed from the overall measurement. Such process is generally referred to as de-embedding.(More)
An 8 mm-band two-dimensional Synthetic Aperture Interferometric Radiometer (SAIR) called BHU-2D has been developed by Electromagnetics Engineering Laboratory of Beihang University. The radiometer could obtain images in real-time benefiting from the adoption of a 1 bit/2 level FPGA-based correlator array. The correlator array requires a group of Power(More)
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