【摘要】 本文讨论了ESR波谱仪中耿氏边际振荡器的工作原理和在测量介质介电常数方面的应用。还讨论了插入振荡器腔体介质所产生频偏值的近似计算方法,用的矩形腔体工作于H₁₀₆、H₁₀₇、H₁₀₈等高次模式时,用腔体微扰法得到的计算值与实验值基本相符,相对偏差一般不超过10％。实验值的不重复性误差是在所用波长计的精度（±1MH_Z）之内。实验表明,由于此种振荡器能自动调谐,用它来测量介质介电常数时将特别方便。更多还原

【Abstract】 The authors discuss the operating principle of the Gunn marginal oscillator and the usefulness of the oscillator for measuring dielectric constant Cavity of the oscillator Was constructed by a section of reduced height waveguide and a slotted waveguide. In order to obtain reliable result,three cavities consisting of different slotted waveguides were used and operated in H106 H107 and H108 modes. The oscillating frequency shift produced by the inserting of the dielectric material was measured and it was found that this frequency shift can be calculated by a cavity perturbation method. The experimental result shows that the calculated values of the frequency shifts are basically in consistent with the measured values. The experimental effor is in the limit of that determined with the wavelength meter. From the above results, one conclude that microwave Gunn marginal oscillator can be conveniently applied to the measurements of dielectric constant and thicknessof dielectricmaterials.更多还原