Pad Attenuator (Pi & Tee) Calculator

Pad Attenuator (Pi, Tee, & Bridged-Tee) Calculator

Inputs

Z₀ Ohms Ω
Attenuation dB

Outputs

Pi Attenuator:

Tee Attenuator:

Bridged-Tee Attenuator:

Formulas Used

	Pi Attenuator	Tee Attenuator	Bridged-tee Attenuator
$R_{1} (Ω) =$	$\frac{1}{\frac{(a^{2} + 1)}{Z_{0} (Ω) (a^{2} - 1)} - \frac{1}{R_{2}}}$	$Z_{0} (Ω) \frac{(a^{2} + 1)}{(a^{2} - 1)} - R_{2}$	$Z_{0} (Ω)$
$R_{2} (Ω) =$	$\frac{(a^{2} - 1)}{2 a} \sqrt{Z_{0} (Ω)^{2}}$	$\frac{2 a}{(a^{2} - 1)} \sqrt{Z_{0} (Ω)^{2}}$	$\frac{Z_{0} (Ω)}{10^{\frac{d B}{20}} - 1}$
$R_{3} (Ω) =$	$\frac{1}{\frac{(a^{2} + 1)}{Z_{0} (Ω) (a^{2} - 1)} - \frac{1}{R_{2}}}$	$Z_{0} (Ω) \frac{(a^{2} + 1)}{(a^{2} - 1)} - R_{2}$	$Z_{0} (Ω)$
$R_{4} (Ω) =$			$Z_{0} (Ω) [10^{\frac{d B}{20}} - 1]$

Pi Attenuator
$R_{1} (Ω) =$	$\frac{1}{\frac{(a^{2} + 1)}{Z_{0} (Ω) (a^{2} - 1)} - \frac{1}{R_{2}}}$
$R_{2} (Ω) =$	$\frac{(a^{2} - 1)}{2 a} \sqrt{Z_{0} (Ω)^{2}}$
$R_{3} (Ω) =$	$\frac{1}{\frac{(a^{2} + 1)}{Z_{0} (Ω) (a^{2} - 1)} - \frac{1}{R_{2}}}$

Tee Attenuator
$R_{1} (Ω) =$	$Z_{0} (Ω) \frac{(a^{2} + 1)}{(a^{2} - 1)} - R_{2}$
$R_{2} (Ω) =$	$\frac{2 a}{(a^{2} - 1)} \sqrt{Z_{0} (Ω)^{2}}$
$R_{3} (Ω) =$	$Z_{0} (Ω) \frac{(a^{2} + 1)}{(a^{2} - 1)} - R_{2}$

Bridged-tee Attenuator
$R_{1} (Ω) =$	$Z_{0} (Ω)$
$R_{2} (Ω) =$	$\frac{Z_{0} (Ω)}{10^{\frac{d B}{20}} - 1}$
$R_{3} (Ω) =$	$Z_{0} (Ω)$
$R_{4} (Ω) =$	$Z_{0} (Ω) [10^{\frac{d B}{20}} - 1]$

Disclaimer:

Qorvo makes no representations or warranties of any kind, express or implied, about the completeness, accuracy, or reliability of the tools on this web page. In no event will Qorvo be liable to any user of these tools for any loss or damages, including without limitation, indirect or consequential damages arising out of or associated with the use of these tools.

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