Title :
Small and robust antennas for concrete embedded sensors
Author :
Rindorf, Lars ; Jakobsen, Kaj Bjarne
Author_Institution :
Center for Microtechnol. & Surface Anal., Danish Technol. Inst., Taastrup, Denmark
Abstract :
We study a small antenna for a structural health monitoring sensor. The sensor is cast into concrete. The sensor monitors the humidity and temperature of the concrete, which is a harsh environment. From measured material parameters of the concrete we estimate the signal loss and the antenna detuning. We find that the antenna is considerably detuned due to the high dielectric constant of concrete. The attenuation of the transmitted signal is due to dielectric losses in the concrete.
Keywords :
antennas; concrete; condition monitoring; sensors; structural engineering; antenna detuning; concrete embedded sensors; harsh environment; robust antennas; signal loss; small antennas; structural health monitoring sensor; Antenna measurements; Concrete; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Humidity; Loss measurement; Monitoring; Robustness; Temperature sensors;
Conference_Titel :
Antennas & Propagation Conference, 2009. LAPC 2009. Loughborough
Conference_Location :
Loughborough
Print_ISBN :
978-1-4244-2720-8
Electronic_ISBN :
978-1-4244-2721-5
DOI :
10.1109/LAPC.2009.5352502
