TY - GEN
T1 - Non-Contact Radio Frequency Level Sensor Based on Wheeler Cap
AU - Pratoomma, Prakorn
AU - Zandamela, Abel
AU - Narbudowicz, Adam
AU - Chalermwisutkul, Suramate
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - In this paper, we propose a novel non-contact liquid level sensor based on the Wheeler cap. The sensor utilizes an electrically small antenna operating at 276 MHz enclosed within a metal cap, in conjunction with the liquid container. By analyzing the reflection coefficient at the antenna feed and evaluating the magnitude and frequency of the minimum value, the sensor enables determination of the water level. The experimental results demonstrate the sensor's effectiveness in measuring water levels within the range of 0 to 94 mm, in a water container measuring 109x109x123 mm3. Notably, minimal variations in frequency and magnitude of the minimum reflection coefficient are observed at water levels below 50 mm, while the sensor exhibits improved sensitivity for water levels above 50 mm. The proposed sensor can offer a promising level sensing solution for liquids with extreme temperatures.
AB - In this paper, we propose a novel non-contact liquid level sensor based on the Wheeler cap. The sensor utilizes an electrically small antenna operating at 276 MHz enclosed within a metal cap, in conjunction with the liquid container. By analyzing the reflection coefficient at the antenna feed and evaluating the magnitude and frequency of the minimum value, the sensor enables determination of the water level. The experimental results demonstrate the sensor's effectiveness in measuring water levels within the range of 0 to 94 mm, in a water container measuring 109x109x123 mm3. Notably, minimal variations in frequency and magnitude of the minimum reflection coefficient are observed at water levels below 50 mm, while the sensor exhibits improved sensitivity for water levels above 50 mm. The proposed sensor can offer a promising level sensing solution for liquids with extreme temperatures.
KW - Electrically Small Antennas
KW - Folded Spherical Helix Antenna
KW - Internet of Things
KW - Level Sensor
KW - Wheeler Cap
UR - https://www.scopus.com/pages/publications/85184825256
U2 - 10.1109/ISAP57493.2023.10388768
DO - 10.1109/ISAP57493.2023.10388768
M3 - Conference contribution
AN - SCOPUS:85184825256
T3 - 2023 IEEE International Symposium on Antennas and Propagation, ISAP 2023
BT - 2023 IEEE International Symposium on Antennas and Propagation, ISAP 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE International Symposium on Antennas and Propagation, ISAP 2023
Y2 - 30 October 2023 through 2 November 2023
ER -