Reconfigurable Sensing Antenna With Novel HDPE-BST Material for Temperature Monitoring

A UHF-band reconfigurable sensing antenna (RSA) with temperature sensation function is presented in this letter. In order to obtain a high sensitivity, a novel composite material-namely, high-density polyethylene Ba 0.3 Sr 0.7 TiO 3 (HDPE-BST)-is developed to have a large temperature coefficient of...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2013, Vol.12, p.1420-1423
Main Authors: Qian Qiao, Li Zhang, Fan Yang, Zhenxing Yue, Elsherbeni, Atef Z.
Format: Article
Language:English
Subjects:
Antennas
Bandwidth
Materials
Narrow-bandwidth antenna
reconfigurable sensing antenna
Resonant frequency
Sensitivity
Temperature measurement
temperature sensation
Temperature sensors
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Summary:A UHF-band reconfigurable sensing antenna (RSA) with temperature sensation function is presented in this letter. In order to obtain a high sensitivity, a novel composite material-namely, high-density polyethylene Ba 0.3 Sr 0.7 TiO 3 (HDPE-BST)-is developed to have a large temperature coefficient of relative permittivity, which varies from 7.10 at 20°C to 6.66 at 80°C. This material is directly integrated into a patch RSA design as substrate. Thus, the RSA frequency is reconfigured by the environmental temperature. To increase the temperature sensitivity, the bandwidth of RSA should be as narrow as possible. To this end, a patch RSA resonating at 900 MHz is designed, with a 3-dB gain bandwidth of only 5.4 MHz (0.6%). The experimental results show that an 8 MHz/10°C frequency increment can be obtained in the temperature range from 20°C to 80°C.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2013.2286631