圆波导及同轴波导开放腔的衍射理论

利用横截面法,引入"相位修正因子",求得缓变截面波导开放腔在非对称模的普遍情况下的衍射反射系数,加上纵向波数的谐振条件就可求得开放腔的参数,并可求解多模问题.本中分析了几种形式的开放腔,认为变截面的同轴波导具有最稀疏的本征频谱.文章还对工程设计方法作了简要讨论.

DIFFRACTION THEORY OF OPEN CAVITIES OF THE CIRCULAR AND COAXIAL WAVEGUIDE TYPE

For open cavities with slowly varying cross-section the reflective coefficient of diffraction under general nnsymmetrical mode, when "a phase correction factor" is introduced, can be found by use of the method of transverse-section. Parameters of the open cavities are found under resonant conditions of longitudinal wavenumber. The method described can be used to solve multi-mode problems. Several different types of open cavities are studied, and it is concluded that coaxial open cavity with varying section has the most sparse eigen spectrum. In this paper, method of engineering design is briefly discussed.