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(上接2009年第6期85页)4.3.11截止波导技术波导都具有特定的截止频率,低于其截止频率,电磁波将无法在其内部有效传播。实际上,波导对低于其截止频率60%的频率上的信号的衰减量要远高于屏蔽机
(Continued on page 6 2009 85 85) 4.3.11 Cut-off waveguide Waveguide has a specific cut-off frequency below its cut-off frequency, the electromagnetic wave will not be effective in its internal propagation. In fact, the attenuation of the signal on the waveguide below 60% of its cut-off frequency is much higher than that of the shield machine