| Autor: |
Vincent, Sheeja, Mridula S., Pradeep, Anju |
| Předmět: |
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| Zdroj: |
International Journal of Microwave & Optical Technology; Sep2024, Vol. 19 Issue 5, p487-496, 10p |
| Abstrakt: |
Microstrip fed complementary spiral sensor (MFCSS) for dielectric characterization of liquid samples is proposed in this paper. The samples chosen are coconut oil, sunflower oil, palm oil, castor oil and paraffin. The sensor comprises a complementary spiral resonator embedded in a microstrip fed patch antenna. The resonant frequency of the sensor is 2.4GHz. The sensor is fabricated on FR4 substrate with dielectric constant 4.4, loss tangent 0.02 and thickness 1.6mm. The overall dimension of the sensor is 12.5mmx15mmx1.6mm. The compact size of the sensor is attributed to the complementary spiral resonator. The resonant frequency of the sensor shifts to a lower frequency when immersed in liquid samples. The shift in resonant frequency and reflection coefficient are used to determine the relative permittivity (εr) and loss tangent (tan δ) of liquid samples. The sensor exhibits capabilities in detecting trans fat content in coconut oil. Adulteration of oil samples can also be detected using this procedure as detailed in the paper. The MFCSS exhibits high near field, resulting in improved sensitivity (5.8%). The MFCSS offers precise measurement, the ability to detect minor variations in the dielectric properties of liquid samples, compact size and ease of fabrication. Microstrip feed provides good impedance matching to the sensor. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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