current attenuation

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• attenuation —    A technique that decreases the magnitude of current, voltage, or power of a transmitted signal …   IT glossary of terms, acronyms and abbreviations

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• Skin depth — is a measure of the distance an alternating current can penetrate beneath the surface of a conductor.When an electromagnetic wave interacts with a conductive material, mobile charges within the material are made to oscillate back and forth with… …   Wikipedia

• Mechanical filter — Figure 1. A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( …   Wikipedia