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Broadcast Concepts attenuator application note
1
PI and Tee 50 ohm RF attenuation designsR1 R3 DB------- ------- -------1737.66 2.88 0.5869.55 5.77 1580.5 8.68 1.5436.21 11.61 2349.83 14.59 2.5292.4 17.61 3251.52 20.7 3.5220.97 23.85 4197.32 27.08 4.5178.49 30.4 5163.17 33.82 5.5150.48 37.35 6139.81 41.01 6.5130.73 44.8 7122.92 48.74 7.5116.14 52.84 8110.21 57.12 8.5104.99 61.59 9100.37 66.26 9.596.25 71.15 1092.56 76.28 10.589.24 81.66 1186.25 87.31 11.583.54 93.25 1281.09 99.5 12.578.84 106.07 1376.8 113 13.574.93 120.31 1473.21 128.01 14.571.63 136.14 1570.18 144.72 15.568.83 153.78 1667.59 163.35 16.566.45 173.46 1765.39 184.14 17.564.4 195.43 1863.49 207.38 18.562.64 220.01 1961.85 233.37 19.561.11 247.5 2060.42 262.45 20.559.78 278.28 2159.19 295.02 21.558.63 312.75 2258.11 331.51 22.557.62 351.36 2357.16 372.39 23.556.73 394.65 24
Port1 Port2
R1R1R
R3
PI PAD SCHEMATIC
Broadcast Concepts attenuator application note
2
R1 R3 DB------- ------- -------1.44 868.11 0.52.88 433.34 14.31 288.1 1.55.73 215.24 27.15 171.34 2.58.55 141.93 39.94 120.79 3.511.31 104.83 412.67 92.32 4.514.01 82.24 515.32 73.92 5.516.61 66.93 617.88 60.96 6.519.12 55.8 720.34 51.29 7.521.53 47.31 822.68 43.77 8.523.81 40.59 924.91 37.73 9.525.97 35.14 1027.01 32.77 10.528.01 30.62 1128.98 28.63 11.529.92 26.81 1230.83 25.13 12.531.71 23.57 1332.55 22.12 13.533.37 20.78 1434.15 19.53 14.534.9 18.36 1535.63 17.27 15.536.32 16.26 1636.98 15.3 16.537.62 14.41 1738.23 13.58 17.538.82 12.79 1839.38 12.06 18.539.91 11.36 1940.42 10.71 19.540.91 10.1 2041.37 9.53 20.541.82 8.98 2142.24 8.47 21.542.64 7.99 2243.02 7.54 22.543.39 7.12 2343.74 6.71 23.544.06 6.33 24
Port1 Port2
R1 R1
R3
TEE PAD SCHEMATIC