## Return Loss of Low-Noise Amplifier Solution

STEP 0: Pre-Calculation Summary
Formula Used
Return Loss = modulus((Input Impedance-Source Impedance)/(Input Impedance+Source Impedance))^2
Γ = modulus((Zin-Rs)/(Zin+Rs))^2
This formula uses 1 Functions, 3 Variables
Functions Used
modulus - Modulus of number, modulus
Variables Used
Return Loss - Return Loss is a measure of the amount of signal power reflected back from a load or discontinuity in a transmission line or optical fiber.
Input Impedance - (Measured in Ohm) - Input Impedance is the opposition to current flow into an electrical circuit when a voltage is applied to its input terminals.
Source Impedance - (Measured in Ohm) - Source Impedance is the opposition to current flow that the source presents to the load.
STEP 1: Convert Input(s) to Base Unit
Input Impedance: 1.07 Ohm --> 1.07 Ohm No Conversion Required
Source Impedance: 23 Ohm --> 23 Ohm No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Γ = modulus((Zin-Rs)/(Zin+Rs))^2 --> modulus((1.07-23)/(1.07+23))^2
Evaluating ... ...
Γ = 0.830089810411366
STEP 3: Convert Result to Output's Unit
0.830089810411366 --> No Conversion Required
0.830089810411366 0.83009 <-- Return Loss
(Calculation completed in 00.004 seconds)
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## < 14 Low-Noise Amplifiers and Mixers Calculators

Feedback Factor of Low Noise Amplifier
Feedback Factor = (Transconductance*Source Impedance-1)/(2*Transconductance*Source Impedance*Voltage Gain)
Return Loss of Low-Noise Amplifier
Return Loss = modulus((Input Impedance-Source Impedance)/(Input Impedance+Source Impedance))^2
Noise Figure of Low Noise Amplifier
Noise Figure = 1+((4*Source Impedance)/Feedback Resistance)+Noise Factor of Transistor
Gate to Source Voltage of Low Noise Amplifier
Gate to Source Voltage = ((2*Drain Current)/(Transconductance))+Threshold Voltage
Threshold Voltage of Low Noise Amplifier
Threshold Voltage = Gate to Source Voltage-(2*Drain Current)/(Transconductance)
Transconductance of Low Noise Amplifier
Transconductance = (2*Drain Current)/(Gate to Source Voltage-Threshold Voltage)
Drain Current of Low Noise Amplifier
Drain Current = (Transconductance*(Gate to Source Voltage-Threshold Voltage))/2
Voltage Gain of Low Noise Amplifier given DC Voltage Drop
Voltage Gain = 2*DC Voltage Drop/(Gate to Source Voltage-Threshold Voltage)
Load Impedance of Low Noise Amplifier
Load Impedance = (Input Impedance-(1/Transconductance))/Feedback Factor
Input Impedance of Low Noise Amplifier
Input Impedance = (1/Transconductance)+Feedback Factor*Load Impedance
Output Impedance of Low Noise Amplifier
Output Impedance = (1/2)*(Feedback Resistance+Source Impedance)
Source Impedance of Low Noise Amplifier
Source Impedance = 2*Output Impedance-Feedback Resistance
Drain Resistance of Low Noise Amplifier
Drain Resistance = Voltage Gain/Transconductance
Voltage Gain of Low Noise Amplifier
Voltage Gain = Transconductance*Drain Resistance

## Return Loss of Low-Noise Amplifier Formula

Return Loss = modulus((Input Impedance-Source Impedance)/(Input Impedance+Source Impedance))^2
Γ = modulus((Zin-Rs)/(Zin+Rs))^2

## Why is return loss important for low-noise amplifiers?

Low-noise amplifiers are used to amplify weak signals. If the return loss of an LNA is too low, some of the amplified signal will be reflected back to the input of the amplifier. This can cause distortion and interference, and it can also reduce the overall gain of the amplifier.

## How to Calculate Return Loss of Low-Noise Amplifier?

Return Loss of Low-Noise Amplifier calculator uses Return Loss = modulus((Input Impedance-Source Impedance)/(Input Impedance+Source Impedance))^2 to calculate the Return Loss, The Return Loss of Low-Noise Amplifier formula is defined as a measure of how well the amplifier matches the impedance of the source and load. A good impedance match is important for minimizing signal reflection and maximizing power transfer. Return Loss is denoted by Γ symbol.

How to calculate Return Loss of Low-Noise Amplifier using this online calculator? To use this online calculator for Return Loss of Low-Noise Amplifier, enter Input Impedance (Zin) & Source Impedance (Rs) and hit the calculate button. Here is how the Return Loss of Low-Noise Amplifier calculation can be explained with given input values -> 0.828644 = modulus((1.07-23)/(1.07+23))^2.

### FAQ

What is Return Loss of Low-Noise Amplifier?
The Return Loss of Low-Noise Amplifier formula is defined as a measure of how well the amplifier matches the impedance of the source and load. A good impedance match is important for minimizing signal reflection and maximizing power transfer and is represented as Γ = modulus((Zin-Rs)/(Zin+Rs))^2 or Return Loss = modulus((Input Impedance-Source Impedance)/(Input Impedance+Source Impedance))^2. Input Impedance is the opposition to current flow into an electrical circuit when a voltage is applied to its input terminals & Source Impedance is the opposition to current flow that the source presents to the load.
How to calculate Return Loss of Low-Noise Amplifier?
The Return Loss of Low-Noise Amplifier formula is defined as a measure of how well the amplifier matches the impedance of the source and load. A good impedance match is important for minimizing signal reflection and maximizing power transfer is calculated using Return Loss = modulus((Input Impedance-Source Impedance)/(Input Impedance+Source Impedance))^2. To calculate Return Loss of Low-Noise Amplifier, you need Input Impedance (Zin) & Source Impedance (Rs). With our tool, you need to enter the respective value for Input Impedance & Source Impedance 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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