Image Rejection Ratio Calculator

✖Image Frequency is defined as the sum of received signal and twice the intermediate frequency.ⓘ Image Frequency [f_img]			+10% -10%
✖Received Signal Frequency is that frequency which is obtained at the receiver end of a Radio Channel.ⓘ Received Signal Frequency [F_RF]			+10% -10%

✖Image Rejection Ratio is the ratio of the intermediate-frequency (IF) signal level produced by the desired input frequency to that produced by the image frequency.ⓘ Image Rejection Ratio [ρ]

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Image Rejection Ratio Solution

STEP 0: Pre-Calculation Summary

Formula Used

Image Rejection Ratio = (Image Frequency/Received Signal Frequency)-(Received Signal Frequency/Image Frequency)
ρ = (f_img/F_RF)-(F_RF/f_img)
This formula uses 3 Variables

Variables Used

Image Rejection Ratio - (Measured in Decibel) - Image Rejection Ratio is the ratio of the intermediate-frequency (IF) signal level produced by the desired input frequency to that produced by the image frequency.
Image Frequency - (Measured in Hertz) - Image Frequency is defined as the sum of received signal and twice the intermediate frequency.
Received Signal Frequency - (Measured in Hertz) - Received Signal Frequency is that frequency which is obtained at the receiver end of a Radio Channel.

STEP 1: Convert Input(s) to Base Unit

Image Frequency: 195 Hertz --> 195 Hertz No Conversion Required
Received Signal Frequency: 55 Hertz --> 55 Hertz No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

ρ = (f_img/F_RF)-(F_RF/f_img) --> (195/55)-(55/195)

Evaluating ... ...

ρ = 3.26340326340326

STEP 3: Convert Result to Output's Unit

3.26340326340326 Decibel --> No Conversion Required

FINAL ANSWER

3.26340326340326 ≈ 3.263403 Decibel <-- Image Rejection Ratio

(Calculation completed in 00.020 seconds)

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Created by Rachita C

BMS College Of Engineering (BMSCE), Banglore

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BMS College of Engineering (BMSCE), Bangalore

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< Fundamentals of Analog Communications Calculators

Intermediate Frequency

LaTeX Go Intermediate Frequency = (Local Oscillation Frequency-Received Signal Frequency)

Transmission Efficiency with respect to Modulation Index

LaTeX Go Transmission Efficiency of AM Wave = Modulation Index^2/(2+Modulation Index^2)

Image Frequency

LaTeX Go Image Frequency = Received Signal Frequency+(2*Intermediate Frequency)

Crest Factor

LaTeX Go Crest Factor = Peak Value of Signal/RMS Value of Signal

Image Rejection Ratio Formula

LaTeX Go

Image Rejection Ratio = (Image Frequency/Received Signal Frequency)-(Received Signal Frequency/Image Frequency)
ρ = (f_img/F_RF)-(F_RF/f_img)

How can an image rejection frequency be suppressed?

The image spectrum can be suppressed via filtering, but the filtering approach to image rejection involves an important design trade-off and prevents monolithic integration. Direct conversion eliminates the image problem, but it has various disadvantages.

How to Calculate Image Rejection Ratio?

Image Rejection Ratio calculator uses Image Rejection Ratio = (Image Frequency/Received Signal Frequency)-(Received Signal Frequency/Image Frequency) to calculate the Image Rejection Ratio, Image Rejection Ratio is a measure of a receiver's ability to reject signals at its image frequency. Image Rejection Ratio is denoted by ρ symbol.

How to calculate Image Rejection Ratio using this online calculator? To use this online calculator for Image Rejection Ratio, enter Image Frequency (f_img) & Received Signal Frequency (F_RF) and hit the calculate button. Here is how the Image Rejection Ratio calculation can be explained with given input values -> 3.263403 = (195/55)-(55/195).

FAQ

What is Image Rejection Ratio?

Image Rejection Ratio is a measure of a receiver's ability to reject signals at its image frequency and is represented as ρ = (f_img/F_RF)-(F_RF/f_img) or Image Rejection Ratio = (Image Frequency/Received Signal Frequency)-(Received Signal Frequency/Image Frequency). Image Frequency is defined as the sum of received signal and twice the intermediate frequency & Received Signal Frequency is that frequency which is obtained at the receiver end of a Radio Channel.

How to calculate Image Rejection Ratio?

Image Rejection Ratio is a measure of a receiver's ability to reject signals at its image frequency is calculated using Image Rejection Ratio = (Image Frequency/Received Signal Frequency)-(Received Signal Frequency/Image Frequency). To calculate Image Rejection Ratio, you need Image Frequency (f_img) & Received Signal Frequency (F_RF). With our tool, you need to enter the respective value for Image Frequency & Received Signal Frequency 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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