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Balanced Attenuator Calculator

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Balanced Attenuator Calculator | RF Pad Solver
dB
Ω
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Shunt Resistance (R1 Resistor)
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Input Parameters Specification

Attenuation (dB) The targeted power drop signal reduction log value amplitude ratio required to damp incoming wave energies, specified in Decibels (dB).
Characteristic Impedance (Ω) The baseline source driver circuit matching resistance or load network impedance matching line scale, measured in Ohms (Ω).

Practical Operational Examples

Example 1: Standard 3 dB Signal Power Matching Pad
• Target Attenuation = 3.00 dB | Line Impedance = 50.00 Ω
• Calculated Symmetrical Shunt Resistor R1 Value: 118.3374 Ω
Example 2: 10 dB RF Cable Attenuator Network
• Target Attenuation = 10.00 dB | Line Impedance = 75.00 Ω
• Calculated Symmetrical Shunt Resistor R1 Value: 34.6852 Ω

Lattice Balanced Attenuator Circuit Schema

The layout maps the cross-over trace links (X rails) along with dual ground-referenced parallel shunt resistors (R1) defining a true balanced topology network.

Z0 R1 R1 Z0

Formulas & Mathematical Logic

Symmetrical Shunt Resistor R1 Formulation:
R1 = Impedance * (1 / (10^(Attenuation / 20) - 1))

The mathematical framework leverages linear voltage step transformations derived directly from decibel reduction algorithms to safely determine exact component values for balanced network environments.

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About this tool

Balanced Attenuator Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.