本篇論文以兩種理論計算、數值模擬以及實驗方法應用於矩形微波共振腔來量測材料之複數介電常數。這兩種方法包括微擾法以及腔體法。實驗上是利用HP8510網路分析儀量測處於TE101 及TE102模時，空腔及放有樣本之腔體其共振頻率以及品質因子。實驗以Teflon為樣本，且使用Ka微波頻帶。腔體法量測結果與模擬數值實部誤差約為1.9%， tan□誤差約為34%。腔體微擾法量測的結果與大部分已知文獻結果都極為接近。

The theoretical calculation, simulation, and two experimental methods using microwave rectangular cavity are shown in this thesis for measuring the complex permittivity of dielectrics. The two experimental methods are perturbation and cavity methods. The measurements of resonant frequency and Q-factor were conducted in empty and loaded rectangular metallic cavities with TE101 and TE102 modes using HP8510 network analyzer. Teflon was used to verify simulation data at Ka-band. The deviations between simulation and experimental results using cavity method are 1.9% and 34% for real part and tan□ of complex permittivity, respectively. The experimental results using perturbation method were almost the same as that reported in many previous articles.

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