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Non-destructive testing for black heart cavity in potatoes with microwave radiation.

Mohamed, I; Dudley, R; Gregory, A; Mouthaan, R; Tian, Z; Andrews, P*; Mellonie, A* (2016) Non-destructive testing for black heart cavity in potatoes with microwave radiation. In: 46th European Microwave Conference (EuMC), 4-6 October 2016, London, UK.

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Abstract

We investigate the use of microwaves in the non-destructive detection of black heart cavities. Complex permittivity data for the Melody variety are presented between 0.5 and 20 GHz. Additionally, a polysorbate, sodium chloride and water based solution was created as a potato "phantom" liquid: one that has the same dielectric properties of a real potato in the frequency range 2 to 4 GHz. Electromagnetic finite-difference time-domain simulations show the presence of a black heart cavity can produce changes in how microwaves propagate through a potato that can be detected as changes in the magnitude of microwaves detected at the potato's surface. Experimental data taken using the potato phantom for repeatable readings confirms the simulations. It was found however that the change in the transmitted magnitude caused by the presence of a simulated black heart cavity were only in the order of 0.1 dB.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: Electromagnetics
Electromagnetics > RF and Microwave
Identification number/DOI: 10.1109/EuMC.2016.7824468
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/7410

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