Improvement on Uneven Heating in Microwave Oven by Diodes-Loaded Planar Electromagnetic Field Stirrer

Ryosuke SUGA  Naruki SAITO  

IEICE TRANSACTIONS on Electronics   Vol.E103-C   No.9   pp.388-395
Publication Date: 2020/09/01
Publicized: 2020/03/30
Online ISSN: 1745-1353
DOI: 10.1587/transele.2019ECP5043
Type of Manuscript: PAPER
Category: Microwaves, Millimeter-Waves
microwave oven,  uneven heating,  planar electromagnetic field stirrer,  standing wave,  temperature distribution,  

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A planar electromagnetic field stirrer with periodically arranged metal patterns and diode switches is proposed for improving uneven heating of a heated object placed in a microwave oven. The reflection phase of the proposed stirrer changes by switching the states of diodes mounted on the stirrer and the electromagnetic field in the microwave oven is stirred. The temperature distribution of a heated object located in a microwave oven was simulated and measured using the stirrer in order to evaluate the improving effect of the uneven heating. As the result, the heated parts of the objects were changed with the diode states and the improving effect of the uneven heating was experimentally indicated.