从结构上分一般分为：微带和腔体2种。腔体耦合器内部是2条金属杆，组成的一级耦合。
From the structure points are generally classified into: microstrip and recessed 2 kinds. Recessed couplers interior is 2 a metal bar, composed of first-degree coupling.
仪器一般靠机械调谐腔体来改变频率，每台可覆盖一个倍频程左右，由腔体耦合出的信号功率一般可达10毫瓦以上。
General machinery equipment by tuning cavity to change the frequency of each cover an octave or so, the body cavity by coupling a signal to the general power of up to 10 milliwatts or more.
交叉耦合滤波器的综合从给定的传输零点和回波损耗出发，直到得到各腔体之间的耦合系数。
The synthesis of the cross coupled filter is from prescribed transmission zeros and return loss till the attainment of the coupling matrix of each cavity.
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