并用微扰法计算和分析了四层漏波导结构。
The four-layer leaky waveguide mechanism is analyzed by perturbation method also.
再次，设计实现了基于微扰小环和垂直叠放结构的微带双模双通带带通滤波器。
Thirdly, a dual-mode dual-band bandpass filter with rectangular-loop perturbation and stacked structure is presented.
再次，设计实现了基于微扰小环和垂直叠放结构的微带双模双通带带通滤波器。
Thirdly, a dual-mode dual-band bandpass filter with rectangular-loop perturbation and stacked structure is presented.
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