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由于常用的“渐吸收”式波导负载很难做到小尺寸与良好匹配的统一,本文提出了利用电磁波通过介质时能造成多次反射与吸收的物理现象,进行波导负载小型化的设计。根据有耗传输线的一般原理,当传输线中充入一小段参数μ_r和ε_r的有耗介质(如铁氧磁材料),且终端短路时,在空气与介质交界面处的输入阻抗可表示为: Z_d=Z_rthrd (1)式中:Z_r——介质填充段的传输线特性阻抗,
Due to the common “progressive absorption” type of waveguide load is difficult to achieve the unity of small size and good matching, this paper presents the use of electromagnetic waves through the medium can cause multiple reflection and absorption of physical phenomena, the waveguide load miniaturization design. According to the general principle of lossy transmission line, when the transmission line is filled with a short piece of lossy medium (such as ferrite) with parameters μ_r and ε_r and the terminal is short-circuited, the input impedance at the air-medium interface can be expressed as: Z_d = Z_rthrd (1) Where: Z_r-- dielectric filled section of the transmission line characteristic impedance,