论文信息 - Highly sensitive chipless wireless relative humidity sensor based on polyvinyl-alcohol film

Highly sensitive chipless wireless relative humidity sensor based on polyvinyl-alcohol film

This paper presents a chipless, highly sensitive, low profile, low cost and easily fabricated passive wireless relative humidity (RH) sensor. The sensor consists of a narrow band loop antenna loaded with PVA film coated interdigital capacitor (IDC) at 2.85 GHz. The RH sensor generates an amplitude peak at resonance in the radar cross section (RCS), which changes with different RH. The sensor is interrogated remotely by a reader antenna, and the measurement results show a good sensitivity up to 5.35 MHz/%RH above 50% RH.

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