正弦电磁场作用下介质吸波特性研究

Study of Dielectric Absorption in a Time-Harmonic Electromagnetic Field

微波技术广泛用于无线通信、材料处理和材料介电常数测量等领域.微波处理材料的优点是传热快、体积加热、选择性加热、无环境污染和容易自动控制.作者描述了正弦电磁场与介质相互作用时的加热机理.对德拜型和非德拜型弛豫介质,导出了其介质吸波特性的计算模型Pd=21ωε″E2+21E2(cos2ωtεt′+cosωtsinωtεt″更重要的是,此模型甚至可用于解释微波辐照下材料发生的瞬态过程.

Microwave techniques are nowadays wide spread throughout wireless communication, material processing and material permittivity measurement. The major advantages of using microwave for material processing are rapid heat transfer, volumetric heating , selective heating, pollution-free environment and automaticcontrol. The authors describe the heating mechanism on interaction of time-harmonic electromagnetic field with dielectric. For deby and non-debye relaxation dielectric, a modeling was deduced to calculat...