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Dielectric properties of cereals at frequencies useful for processes with microwave heating

机译:谷物的介电特性对微波加热过程有用

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Dielectric properties of barley, corn (white and yellow), sorghum, and wheat at microwave frequencies for heating purpose were analyzed. Properties were determined at 915, 2450 and 5800 MHz with the free space transmission method in the cereals at 20, 30, 40, 50 and 60 A degrees C. epsilon A ' and epsilon"of all the cereals decreased with increasing frequency. epsilon A ' slightly increased with temperature, while epsilon "remained practically constant for all the cereals in the temperature range from 20 to 60 A degrees C. Penetration depth decreased with increasing frequency for all the samples, and increased with increasing temperature at 915 MHz, except for barley. These results are useful for further microwave heating applications for the studies on cereals.
机译:分析了用于加热目的的大麦,玉米(白色和黄色),高粱和小麦在微波频率下的介电性能。在20、30、40、50和60 A的温度下,使用自由空间传输法在915、2450和5800 MHz处测定谷物的特性。所有谷物的εA和ε随频率增加而降低。随着温度的升高略有增加,而“ε”在20至60 A的温度范围内对所有谷物几乎保持恒定。渗透深度随所有样品的频率增加而降低,并随915 MHz处温度的升高而增加,除了大麦。这些结果对于谷物研究中的进一步微波加热应用是有用的。

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