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Return Loss by Means of VSWR Formula

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Return loss is a measure of the amount of power reflected back from a transmission line or an antenna, typically expressed in decibels (dB). Check FAQs

P ret = 20 \cdot \log 10 (\frac{VSWR + 1}{VSWR - 1})

P_ret - Return Loss?VSWR - Voltage Standing Wave Ratio?

Return Loss by Means of VSWR Example

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Here is how the Return Loss by Means of VSWR equation looks like with Values.

Here is how the Return Loss by Means of VSWR equation looks like with Units.

Here is how the Return Loss by Means of VSWR equation looks like.

5.3655 = 20 \cdot \log 10 (\frac{3.34 + 1}{3.34 - 1})

5.3655dB = 20 \cdot \log 10 (\frac{3.34 + 1}{3.34 - 1})

5.3655 = 20 \cdot \log 10 (\frac{3.34 + 1}{3.34 - 1})

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Return Loss by Means of VSWR Solution

Follow our step by step solution on how to calculate Return Loss by Means of VSWR?

FIRST Step Consider the formula

P ret = 20 \cdot \log 10 (\frac{VSWR + 1}{VSWR - 1})

Next Step Substitute values of Variables

∴

P ret = 20 \cdot \log 10 (\frac{3.34 + 1}{3.34 - 1})

Next Step Prepare to Evaluate

∴

P ret = 20 \cdot \log 10 (\frac{3.34 + 1}{3.34 - 1})

Next Step Evaluate

∴

P ret = 5.36547744204736dB

LAST Step Rounding Answer

∴

P ret = 5.3655dB

Return Loss by Means of VSWR Formula Elements

Variables

Functions

Return Loss

Return loss is a measure of the amount of power reflected back from a transmission line or an antenna, typically expressed in decibels (dB).

Symbol: P_ret

Measurement: NoiseUnit: dB

Note: Value can be positive or negative.

Formulas to find Return Loss

Voltage Standing Wave Ratio

Voltage Standing wave ratio is the ratio of maximum and minimum magnitude of voltage on a line having on a line having standing waves.

Symbol: VSWR

Measurement: NAUnit: Unitless

Note: Value should be greater than 1.

Formulas to find Voltage Standing Wave Ratio

log10

The common logarithm, also known as the base-10 logarithm or the decimal logarithm, is a mathematical function that is the inverse of the exponential function.

Syntax: log10(Number)

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How to Evaluate Return Loss by Means of VSWR?

Return Loss by Means of VSWR evaluator uses Return Loss = 20*log10((Voltage Standing Wave Ratio+1)/(Voltage Standing Wave Ratio-1)) to evaluate the Return Loss, The Return loss by means of VSWR formula is defined as an interaction between the wave travelling from the transmitter to the antenna and the wave reflected by the antenna towards the transmitter creates what is known as a stationary wave, therefore an alternative way to measure the impedance mismatch is by means of the Voltage Standing Wave Ratio(VSWR). Return Loss is denoted by P_ret symbol.

How to evaluate Return Loss by Means of VSWR using this online evaluator? To use this online evaluator for Return Loss by Means of VSWR, enter Voltage Standing Wave Ratio (VSWR) and hit the calculate button.

FAQs on Return Loss by Means of VSWR

What is the formula to find Return Loss by Means of VSWR?

The formula of Return Loss by Means of VSWR is expressed as Return Loss = 20*log10((Voltage Standing Wave Ratio+1)/(Voltage Standing Wave Ratio-1)). Here is an example- 5.365477 = 20*log10((3.34+1)/(3.34-1)).

How to calculate Return Loss by Means of VSWR?

With Voltage Standing Wave Ratio (VSWR) we can find Return Loss by Means of VSWR using the formula - Return Loss = 20*log10((Voltage Standing Wave Ratio+1)/(Voltage Standing Wave Ratio-1)). This formula also uses Common Logarithm (log10) function(s).

Can the Return Loss by Means of VSWR be negative?

Yes, the Return Loss by Means of VSWR, measured in Noise can be negative.

Which unit is used to measure Return Loss by Means of VSWR?

Return Loss by Means of VSWR is usually measured using the Decibel[dB] for Noise. Neper[dB], MilliDecibel[dB] are the few other units in which Return Loss by Means of VSWR can be measured.

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