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