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PiSection AttenuatorThe table in Figure below lists resistor values for the Π attenuator matching a 50 Ω source/ load at some common attenuation levels. The resistors corresponding to other attenuation levels may be calculated from the equations.
Formulas for Πsection attenuator resistors, given K, the voltage attenuation ratio, and Z_{I} = Z_{O} = 50 Ω. The above apply to the πattenuator below. What resistor values would be required for both the Π attenuators for 10 dB of attenuation matching a 50 Ω source and load?
10 dB Πsection attenuator example for matching a 50 Ω source and load. The 10 dB corresponds to a voltage attenuation ratio of K=3.16 in the next to last line of the above table. Transfer the resistor values in that line to the resistors on the schematic diagram in Figure above.


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