Title :
Development of a 94GHz passive millimeter wave imaging system for target detection in haze and smoke
Author :
Luo, B. ; Ong, L.C. ; Karim, M.F.
Author_Institution :
Inst. for Infocomm Res., A*STAR, Singapore, Singapore
Abstract :
A 94GHz passive millimeter wave (PMMW) imaging system is designed, prototyped and tested for target detection in haze and fog. To compact the system size and increase the scan area and speed, continue azimuth with step elevation (θ-φ) scanning is used here. Center frequency of the detected signal is 94GHz and the bandwidth is +/-2GHz. To increase the sensitivity and eliminate noise, an instrumentation amplifier and an active low pass filter with 10Hz cutoff bandwidth are adopted in this system. Test conducted in a sheath room shows that this system is suitable for detecting target in thick smoke.
Keywords :
active filters; air pollution; amplifiers; atmospheric techniques; environmental engineering; environmental science computing; low-pass filters; millimetre wave imaging; object detection; pollution measurement; smoke; PMMW; active low pass filter; bandwidth 10 Hz; center frequency; continue azimuth; cutoff bandwidth; frequency 94 GHz; haze; instrumentation amplifier; noise elimination; passive millimeter wave imaging system; scan area; scan speed; sensitivity; sheath room; step elevation scanning; system size; target detection; thick smoke; Active filters; Biomedical measurement; Imaging; Microwave filters; Millimeter wave technology; Noise; Receivers; imaging; passive millimeter wave;
Conference_Titel :
Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO), 2013 IEEE MTT-S International
Conference_Location :
Singapore
DOI :
10.1109/IMWS-BIO.2013.6756216
