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Attenuators

Table 1. Attenuator resistor values for Zo=50 ohms.
(You can scale the values for any other Zo)

ATTENUATORSAttenuation, dBPi AttenuatorTee Attenuator
(Zo=50 ohms)R1 ohmR2 ohmR1 ohmR2 ohm
1869.55.82.9433.3
2436.211.65.7215.2
3292.417.68.5141.9
4221.023.811.3104.8
5178.530.414.082.2
6150.537.416.666.9
7130.744.819.155.8
8116.152.821.547.3
9105.061.623.840.6
1096.271.226.035.1
1189.281.728.030.6
1283.593.229.926.8
1378.8106.131.723.6
1474.9120.333.420.8
1571.6136.134.918.4
1668.8153.836.316.3
1766.4173.537.614.4
1864.4195.438.812.8
1962.6220.039.911.4
2061.1247.540.910.1
3053.3789.846.93.2
4051.02499.849.01.0
5050.37905.649.70.32

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