基于可切换频率选择表面的微波加热数值研究  

Numerical Investigation Based on Switchable Frequency Selective Surface for Microwave Heating

作　　者：高欣悦 肖玮 GAO Xinyue;XIAO Wei(College of Big Data and Information Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学大数据与信息工程学院,贵阳550025

出　　处：《微波学报》2024年第3期40-45,共6页Journal of Microwaves

基　　金：贵州省科技计划项目(黔科合基础-ZK[2021]一般298)。

摘　　要：为解决微波加热中普遍存在的加热不均匀问题,已提出模式搅拌器、旋转转盘等机械转动方法来改变加热物体中的电场分布,从而提高加热均匀性。然而,机械转动的方法往往使得仿真计算困难并且会增加微波系统的复杂性。因此,本文提出一种应用于微波加热的可切换频率选择表面,其工作频率为2.45 GHz,通过调整PIN二极管的开关状态来改变电场分布,将不同状态下的频率选择表面在时间上进行联合并加热,可以明显提高加热均匀性和效率。计算结果表明,该频率选择表面在导通和关闭状态下的传输系数分别为-32.10 dB和-0.16 dB,能将均匀性提高43%,加热效率提高42%,有望广泛应用于工业领域。In order to solve the problem of heating non-uniformity in microwave heating,mechanical rotation methods such as mode stirrers and rotating turntables are proposed to change the electric field distribution in heated objects to improve the heating uniformity.However,the mechanical rotation method often makes the simulation calculation difficult and increases the complexity of the microwave system.Therefore,a switchable frequency selective surface with a working frequency of 2.45 GHz for microwave heating is proposed in this paper.By adjusting the switching state of the PIN diode,the electric field distribution can be changed.Moreover,the frequency selective surface in different states are combined in time and heat objects,which can significantly improve the heating uniformity and efficiency.The results show that the transfer coefficients of the frequency selective surface in the on and off states are-32.10 dB and-0.16 dB respectively,the heating uniformity and heating efficiency can be improved by 43%and by 42%respectively.It is expected to be widely used in industrial fields.

关 键 词：微波加热 可切换频率选择表面 时间组合 均匀性 

分 类 号：TM924.76[电气工程—电力电子与电力传动]