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Development and Performance Evaluation of Novel Microwave Planar Sensors for the Precise Quality Assessment of Apples and Bananas

Kalindi S. Shinde, Shweta N. Shah, Piyush N. Patel

Abstract


The permittivity of planar materials can be measured with greater sensitivity by using a slot-loaded microstrip patch sensor antenna. A rectangular patch antenna that was fed by a microstrip transmission line with a narrow rectangular slit etched along its radiating edge. The proposed slot-loaded patch antenna's sensitivity was determined by observing the change in the input reflection coefficient's resonant frequency when the planar dielectric after the patch was positioned; the substrate performance was compared to that of a traditional patch antenna without the slot. For this, a more thorough electrical characterization of fruits dielectric characteristics is needed. A proposed microstrip patch antenna is triangular in shape. By measuring the shift in the resonant frequency of the input reflection coefficient when the planar dielectric substrate was positioned above the patch, the sensitivity and linearity of the recommended slot-loaded patch antenna were determined and compared to those of a traditional triangular patch antenna despite the slot. A development of linearity and high sensitivity microwave planar sensors is necessary to monitor small variations between various materials in complex permittivity measurements of 0.062 to 0.047, 0-0.015, and -1.4E-04 to -1E-05. The experiment's findings demonstrated that the recommended patch antenna's measured sensitivity and linearity were times greater.

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References


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