A Magnetic Coupling-Based Technique for Buried Antenna’s Frequency Adjustment in Wet Soil

Mejjatti, Mounir El; Habbani, Ahmed; Bouanani, Faïssal El

doi:10.1109/commnet52204.2021.9641968

Cited by 1 publication

(1 citation statement)

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“…However, it's noteworthy that in such scenarios, the antenna may face challenges stemming from the dynamic nature of certain soil properties. Specifically, the dielectric permittivity is dependent on several intrinsic parameters such as bulk and specific density, and also extrinsic parameters like temperature and volumetrc water content (VWC) causing disturbances on the resonance frequency [13], bandwidth [14], and directivity [15]. This characteristic can indeed be exploited for the sensing functions to capture variations of the parameters mentioned above [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A microstrip Antenna for Underground Applications with Frequency Insenitivity to soil moisture variations

MEJJATTI,

Habbani

2024

Preprint

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In this article, we propose a novel design of a buried rectangular patch antenna utilizing the ferromag-netic properties to ensure the resonant frequency resistivity against uctuations in soil permittivity,notably due to variations in its water content. The study initially prioritized determining the idealposition of the ferrite core introduced into the substrate and optimizing the external magnetic eldbias for its application. Subsequently, attention was directed towards evaluating the return loss of thedesigned antenna through simulation under conditions where humidity varies between 0 and 50%. Theresults indicated that the transmitter operates in two di erent modes: ordinary and extraordinary,with the latter maintaining a stable frequency with a deviation rate from the initial one on dry soilnot exceeding 3%, instead of the 50% observed for the former mode. This feature grants it the abilityto be deployable in applications with underground nodes, such as in the case of precision agriculture,without needing to intervene to adjust the operating frequency.

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