Multi-Frequency Band Pyroelectric Sensors
AbstractA methodology is proposed for designing a multi-frequency band pyroelectric sensor which can detect subjects with various frequencies or velocities. A structure with dual pyroelectric layers, consisting of a thinner sputtered ZnO layer and a thicker aerosol ZnO layer, proved helpful in the development of the proposed sensor. The thinner sputtered ZnO layer with a small thermal capacity and a rapid response accomplishes a high-frequency sensing task, while the thicker aerosol ZnO layer with a large thermal capacity and a tardy response is responsible for low-frequency sensing tasks. A multi-frequency band pyroelectric sensor is successfully designed, analyzed and fabricated in the present study. The range of the multi-frequency sensing can be estimated by means of the proposed design and analysis to match the thicknesses of the sputtered and the aerosol ZnO layers. The fabricated multi-frequency band pyroelectric sensor with a 1 μm thick sputtered ZnO layer and a 20 μm thick aerosol ZnO layer can sense a frequency band from 4000 to 40,000 Hz without tardy response and low voltage responsivity. View Full-Text
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Hsiao, C.-C.; Liu, S.-Y. Multi-Frequency Band Pyroelectric Sensors. Sensors 2014, 14, 22180-22198.
Hsiao C-C, Liu S-Y. Multi-Frequency Band Pyroelectric Sensors. Sensors. 2014; 14(12):22180-22198.Chicago/Turabian Style
Hsiao, Chun-Ching; Liu, Sheng-Yi. 2014. "Multi-Frequency Band Pyroelectric Sensors." Sensors 14, no. 12: 22180-22198.