Publication
Humidity passive sensors based on UHF RFID using cork dielectric slabs
| Summary: | In this paper we show the design of passive UHF RFID tag antenna on cork substrate. Due to the cork sensitivity to humidity changes, we can use the developed sensor to sense changes in the relative humidity of the environment, without the need for batteries. The antenna is built using inkjet printing technology, which allows a good accuracy of the design manufacturing. The sensor proved usable for humidity changes detection with a variation of threshold power from 11 to 15 dB between 60 and near 100% humidity levels. Presenting, therefore, reading ranges between 3 to 5 meters. © 2015 EurAAP. |
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| Main Authors: | Gonçalves, Ricardo |
| Other Authors: | Pinho, Pedro; Carvalho, Nuno Borges; Tentzeris, Manos M. |
| Subject: | Cork substrate RFID Humidity sensor |
| Year: | 2015 |
| Country: | Portugal |
| Document type: | conference output |
| Access type: | restricted access |
| Associated institution: | Universidade Politécnica de Lisboa |
| Language: | English |
| Origin: | Repositório Científico da Universidade Politécnica de Lisboa |
| Summary: | In this paper we show the design of passive UHF RFID tag antenna on cork substrate. Due to the cork sensitivity to humidity changes, we can use the developed sensor to sense changes in the relative humidity of the environment, without the need for batteries. The antenna is built using inkjet printing technology, which allows a good accuracy of the design manufacturing. The sensor proved usable for humidity changes detection with a variation of threshold power from 11 to 15 dB between 60 and near 100% humidity levels. Presenting, therefore, reading ranges between 3 to 5 meters. © 2015 EurAAP. |
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