Planar sensor for powder grain characterisation

Marcelo S. Coutinho*, Crislane Priscila N. Silva, Manuelle R.T. Oliveira, Hawson V.H.Silva Filho, Gabriel G. Machado, Marcos T. de Melo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


This study presents a microwave planar sensor for characterisation of powdered foods. The sensor is based on four coupled resonators designed to have four poles in the frequency range of 1.0-3 GHz. The pole with more sensitivity is used to measure the samples. The frequency characteristics of the sensor are obtained measuring several well-known samples. It is used to estimate the permittivity of six types of grains. The grains are two types of oatmeal, three types of corn and wheat flour. The experimental results have shown a sensitivity of 36 MHz/Fm-1. The estimated permittivity of materials can be used as the preliminary data for further investigation.

Original languageEnglish
Pages (from-to)1666-1670
Number of pages5
JournalIET Microwaves, Antennas and Propagation
Issue number10
Early online date03 May 2018
Publication statusPublished - 15 Aug 2018
Externally publishedYes

Bibliographical note

Funding Information:
This work was financed by FACEPE, CAPES and CNPq and supported by the Electrical Engineering Postgraduate Program of the Federal University of Pernambuco.

Publisher Copyright:
© The Institution of Engineering and Technology 2018.

Copyright 2018 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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