Standing Wave Ratio Calculator

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Transmission Line Characteristics

Transmission Line & Antenna Theory

✖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.ⓘ Voltage Maxima [V_max]			+10% -10%
✖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.ⓘ Voltage Minima [V_min]			+10% -10%

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

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Formula

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Standing Wave Ratio

Formula

`"SWR" = "V"_{"max"}/"V"_{"min"}`

Example

`"7"="10.5V"/"1.5V"`

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Download Transmission Line Characteristics Formulas PDF

Standing Wave Ratio Solution

STEP 0: Pre-Calculation Summary

Formula Used

Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima
SWR = V_max/V_min
This formula uses 3 Variables

Variables Used

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.
Voltage Maxima - (Measured in Volt) - 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.
Voltage Minima - (Measured in Volt) - 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.

STEP 1: Convert Input(s) to Base Unit

Voltage Maxima: 10.5 Volt --> 10.5 Volt No Conversion Required
Voltage Minima: 1.5 Volt --> 1.5 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

SWR = V_max/V_min --> 10.5/1.5

Evaluating ... ...

SWR = 7

STEP 3: Convert Result to Output's Unit

7 --> No Conversion Required

FINAL ANSWER

7 <-- Standing Wave Ratio (SWR)

(Calculation completed in 00.004 seconds)

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Created by Vidyashree V

BMS College of Engineering (BMSCE), Bangalore

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Verified by Saiju Shah

Jayawantrao Sawant College of Engineering (JSCOE), Pune

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< 15 Transmission Line Characteristics Calculators

Reflection Coefficient in Transmission Line

Go Reflection Coefficient = (Load Impedance of Transmission Line-Characteristics Impedance of Transmission Line)/(Load Impedance of Transmission Line+Characteristics Impedance of Transmission Line)

Resistance at Second Temperature

Go Final Resistance = Initial Resistance*((Temperature Coefficient+Final Temperature)/(Temperature Coefficient+Initial Temperature))

Impedance Matching in Single Section Quarter Wave Line

Go Characteristics Impedance of Transmission Line = sqrt(Load Impedance of Transmission Line*Source Impedance)

Insertion Loss in Transmission Line

Go Insertion Loss = 10*log10(Power Transmitted Before Insertion/Power Received After Insertion)

Return Loss by Means of VSWR

Go Return Loss = 20*log10((Voltage Standing Wave Ratio+1)/(Voltage Standing Wave Ratio-1))

Bandwidth of Antenna

Go Bandwidth of Antenna = 100*((Highest Frequency-Lowest Frequency)/Centre Frequency)

Length of Wound Conductor

Go Length of Wound Conductor = sqrt(1+(pi/Relative Pitch of Wound Conductor)^2)

Characteristic Impedance of Transmission Line

Go Characteristics Impedance of Transmission Line = sqrt(Inductance/Capacitance)

Voltage Standing Wave Ratio (VSWR)

Go Voltage Standing Wave Ratio = (1+Reflection Coefficient)/(1-Reflection Coefficient)

Conductance of Distortionless Line

Go Conductance = (Resistance*Capacitance)/Inductance

Relative Pitch of Wound Conductor

Go Relative Pitch of Wound Conductor = (Length of Spiral/(2*Radius of Layer))

Current Standing Wave Ratio (CSWR)

Go Current Standing Wave Ratio = Current Maxima/Current Minima

Standing Wave Ratio

Go Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima

Wavelength of Line

Go Wavelength = (2*pi)/Propagation Constant

Phase Velocity in Transmission Lines

Go Phase Velocity = Wavelength*Frequency

Standing Wave Ratio Formula

Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima
SWR = V_max/V_min

How is SWR useful?

SWR is often used to assess the health and performance of antennas and transmission lines in radio communication systems. A perfect match corresponds to an SWR of 1:1, indicating all power is being transferred without reflection.

How to Calculate Standing Wave Ratio?

Standing Wave Ratio calculator uses Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima to calculate 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 calculate Standing Wave Ratio using this online calculator? To use this online calculator for Standing Wave Ratio, enter Voltage Maxima (V_max) & Voltage Minima (V_min) and hit the calculate button. Here is how the Standing Wave Ratio calculation can be explained with given input values -> 7 = 10.5/1.5.

FAQ

What is Standing Wave Ratio?

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 and is represented as SWR = V_max/V_min or Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima. 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 & 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.

How to calculate Standing Wave Ratio?

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 is calculated using Standing Wave Ratio (SWR) = Voltage Maxima/Voltage Minima. To calculate Standing Wave Ratio, you need Voltage Maxima (V_max) & Voltage Minima (V_min). With our tool, you need to enter the respective value for Voltage Maxima & Voltage Minima and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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