波导管
Shielded waveguide is a proper name of shielding industry, its basic principle is to adopt the principle of waveguide, according to the use of the case to choose a fixed frequency, the e
lectromagnetic wave higher than this frequency can be through and attenuation transmission, electromagnetic wave lower than this frequency are all shielded or effectively attenuated.
The frequency characteristics of the waveguide can also be described by the cut-off frequency. The electromagnetic wave below the cut-off frequency cannot pass through the waveguide, while the electromagnetic wave above the cut-off frequency can pass through the waveguide.
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