Title :
Design of W-band passive millimeter wave imaging system
Author :
Qike Chen ; Liangchao Li ; Yonghong Zhang ; Yong Fan ; Jianyu Yang
Author_Institution :
EHF Key Lab. of Fundamental Sci., Univ. of Electron. Sci. & Technol., Chengdu, China
Abstract :
A W-band passive imaging system based on focal plane array (FPA) is developed and experimented in this paper. The imager consists of a 500mm diameter parabolic reflector, and 16 feed-horns array, 16 channels FPA wideband radiometric receiver based on Direct-detection total power type, scanning mechanism, image processor and displayer. The arrangement of the feed-horns is well designed to sample the survey scene at Nyquist density in vertical direction. Its achieved angular resolution is 0.47° and the thermal sensitivity varies between 1.3 and 1.5K at integration time 2.5ms. By scanning in azimuthal direction, the system forms one frame of image with field of view (FOV) of about 60°H×8°V in 8 seconds.
Keywords :
focal planes; millimetre wave imaging; FPA wideband radiometric receiver; Nyquist density; W-band passive millimeter wave imaging system; diameter parabolic reflector; feed-horns array; field of view; focal plane array; size 500 mm; temperature 1.3 K to 1.5 K; thermal sensitivity; time 2.5 ms; Arrays; Calibration; Feeds; Imaging; Millimeter wave technology; Radiometry; Receivers; Nyquist sampling density; W-band; focal plane array (FPA); passive millimeter-wave imaging;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2012 Asia-Pacific
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1330-9
Electronic_ISBN :
978-1-4577-1331-6
DOI :
10.1109/APMC.2012.6421813
