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Standing Wave Ratio Formula

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Standing Wave Ratio (SWR) is a ratio of the maximum amplitude of voltage or current to the minimum amplitude along the transmission line. Check FAQs

SWR = \frac{V max}{V min}

SWR - Standing Wave Ratio (SWR)?V_max - Voltage Maxima?V_min - Voltage Minima?

Standing Wave Ratio Example

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Here is how the Standing Wave Ratio equation looks like with Values.

Here is how the Standing Wave Ratio equation looks like with Units.

Here is how the Standing Wave Ratio equation looks like.

7 = \frac{10.5}{1.5}

7 = \frac{10.5V}{1.5V}

7 = \frac{10.5}{1.5}

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Standing Wave Ratio Solution

Follow our step by step solution on how to calculate Standing Wave Ratio?

FIRST Step Consider the formula

SWR = \frac{V max}{V min}

Next Step Substitute values of Variables

∴

SWR = \frac{10.5V}{1.5V}

Next Step Prepare to Evaluate

∴

SWR = \frac{10.5}{1.5}

LAST Step Evaluate

∴

SWR = 7

Standing Wave Ratio Formula Elements

Variables

Standing Wave Ratio (SWR)

Standing Wave Ratio (SWR) is a ratio of the maximum amplitude of voltage or current to the minimum amplitude along the transmission line.

Symbol: SWR

Measurement: NAUnit: Unitless

Note: Value should be greater than 1.

Formulas to find Standing Wave Ratio (SWR)

Voltage Maxima

Voltage maxima, also known as voltage peaks or voltage crests, refer to the highest points or levels of voltage that occur in a transmission line or an antenna system.

Symbol: V_max

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Voltage Maxima

Voltage Minima

Voltage minima typically occur at points where there is a mismatch between the characteristic impedance of the transmission line and the impedance of the connected load.

Symbol: V_min

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Voltage Minima

Other formulas in Transmission Line Characteristics category

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Go Relative Pitch of Wound Conductor

P cond = (\frac{L s}{2 \cdot r layer})

Go Length of Wound Conductor

L cond = \sqrt{1 + {(\frac{π}{P cond})}^{2}}

Go Wavelength of Line

λ = \frac{2 \cdot π}{β}

How to Evaluate Standing Wave Ratio?

Standing Wave Ratio evaluator uses Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima to evaluate the Standing Wave Ratio (SWR), The Standing Wave Ratio formula is defined as the Voltage Standing wave ratio is the ratio of maximum and minimum magnitude of voltage on a line having on a line having standing waves. Standing Wave Ratio (SWR) is denoted by SWR symbol.

How to evaluate Standing Wave Ratio using this online evaluator? To use this online evaluator for Standing Wave Ratio, enter Voltage Maxima (V_max) & Voltage Minima (V_min) and hit the calculate button.

FAQs on Standing Wave Ratio

What is the formula to find Standing Wave Ratio?

The formula of Standing Wave Ratio is expressed as Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima. Here is an example- 7 = 10.5/1.5.

How to calculate Standing Wave Ratio?

With Voltage Maxima (V_max) & Voltage Minima (V_min) we can find Standing Wave Ratio using the formula - Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima.

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