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A fully passive, compact, and low-cost capacitive wireless radio frequency identification (RFID)-enabled sensing system for capacitive sensing and other Internet of Things applications is proposed. This calibration-free sensor utilizes a dual-tag topology, which consists of two closely spaced RFID tags with dipole antennas and printed capacitive sensor component connected to one of the tags. A series...
A fully passive low-cost wireless UHF RFID antenna based sensor for Internet of Things applications is presented. The proposed sensor consists of a closely spaced two-element dipole antenna with a printed sensor electrically connected to one of the antennas. A metamaterial-inspired resonator is used to improve isolation between the two antennas and optimize the size of the antenna structure. The radiating...
A power-harvesting prototype made of a compact antenna and an optimized RF-DC converter circuit is designed to convert the wireless signal given by a 2-way radio into usable DC power at which many low power electronics and displays used in sensors and smart meters can operate. Measurements show electronics up to 13V can be easily powered by holding the harvester 5 inches away from the radio. A capacitive...
This work introduces a first-of-its-kind wireless passive sensing platform combining RFID, microfluidics and inkjet printing technology that enables remote fluid analysis which requires as little as 3 uL of fluid. The tag is fabricated using a novel rapid, low-cost, and low-temperature additive inkjet process making the tag disposable. However, even with its disposable nature, the tag exhibits repeatability...
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