外开槽同轴波导传播特性
Propagation characteristics of coaxial waveguide with outer slotted structure
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摘要: 根据满足边界条件的一系列电磁场方程，采用场匹配法，详细推导了外开槽同轴波导的特征方程。在外开槽同轴波导光滑内同轴半径等于零的情形下，即变成外开槽圆波导，得到其特征方程。数值模拟了外开槽同轴波导及外开槽圆波导中TE01模式的传播特性，得到了不同尺寸外开槽同轴波导开槽间隙半张角和槽深与特征根的变化关系。结果表明:开槽越深，间隙半张角越小，特征根值越小。Abstract: Based on a series of electromagnetic field equations which are in line with the boundary conditions, the eigenequation of coaxial waveguide with outer slotted structure is derived using the fields matching method. When the radius of the inner conductor equals zero, the outer slotted coaxial waveguide is equivalent to an outer slotted cylindrical waveguide, and its eigenequation is derived as well. Numerical results reveal the propagation characteristics of both the coaxial waveguide and cylindrical waveguide with outer slotted structure. The deeper the slots are and the smaller the half angle of the slot gap is, the small the latent roots are.
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