Radiation Resistance Calculator

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Antenna Theory Parameters

Special Antennas

Wave Propagation

✖Total Antenna Resistance is defined as the electrical resistance of an antenna is composed of its ohmic resistance plus its radiation resistance.ⓘ Total Antenna Resistance [R_t]			+10% -10%
✖Ohmic resistance is the material's opposition to the flow of electric current.ⓘ Ohmic Resistance [R_ohm]			+10% -10%

✖Radiation resistance is an effective resistance, due to the power carried away from the antenna as radio waves.ⓘ Radiation Resistance [R_rad]

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Formula

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Radiation Resistance

Formula

`"R"_{"rad"} = "R"_{"t"}-"R"_{"ohm"}`

Example

`"2.25Ω"="4.75Ω"-"2.5Ω"`

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Radiation Resistance Solution

STEP 0: Pre-Calculation Summary

Formula Used

Radiation Resistance = Total Antenna Resistance-Ohmic Resistance
R_rad = R_t-R_ohm
This formula uses 3 Variables

Variables Used

Radiation Resistance - (Measured in Ohm) - Radiation resistance is an effective resistance, due to the power carried away from the antenna as radio waves.
Total Antenna Resistance - (Measured in Ohm) - Total Antenna Resistance is defined as the electrical resistance of an antenna is composed of its ohmic resistance plus its radiation resistance.
Ohmic Resistance - (Measured in Ohm) - Ohmic resistance is the material's opposition to the flow of electric current.

STEP 1: Convert Input(s) to Base Unit

Total Antenna Resistance: 4.75 Ohm --> 4.75 Ohm No Conversion Required
Ohmic Resistance: 2.5 Ohm --> 2.5 Ohm No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_rad = R_t-R_ohm --> 4.75-2.5

Evaluating ... ...

R_rad = 2.25

STEP 3: Convert Result to Output's Unit

2.25 Ohm --> No Conversion Required

FINAL ANSWER

2.25 Ohm <-- Radiation Resistance

(Calculation completed in 00.004 seconds)

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Created by Shobhit Dimri

Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat

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Birsa Institute of Technology (BIT), Sindri

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< 24 Antenna Theory Parameters Calculators

Distance between Transmitting and Receiving Point

Go Transmitter Receiver Distance = (Antenna Current*120*pi*Height of Transmitter*Height of Receiver)/(Strength of Ground Wave Propagation*Wavelength)

Height of Transmitting Antenna

Go Height of Transmitter = (Strength of Ground Wave Propagation*Wavelength*Transmitter Receiver Distance)/(120*pi*Antenna Current*Height of Receiver)

Height of Receiving Antenna

Go Height of Receiver = (Strength of Ground Wave Propagation*Wavelength*Transmitter Receiver Distance)/(120*pi*Height of Transmitter*Antenna Current)

Strength of Ground Wave

Go Strength of Ground Wave Propagation = (120*pi*Height of Transmitter*Height of Receiver*Antenna Current)/(Wavelength*Transmitter Receiver Distance)

Antenna Current

Go Antenna Current = (Strength of Ground Wave Propagation*Wavelength*Transmitter Receiver Distance)/(120*pi*Height of Transmitter*Height of Receiver)

Friis Formula

Go Power at Receiving Antenna = Transmitting Power*Gain of Receiving Antenna*Gain of Transmitting Antenna*Wavelength^2/(4*3.14*Transmitter Receiver Distance)^2

Power Density of Antenna

Go Power Density of Antenna = (Total Input Power*Antenna Gain)/(4*pi*Transmitter Receiver Distance)

Effective Area of Antenna

Go Effective Area Antenna = (Thermal Resistance*Incremental Temperature)/Power Density of Antenna

Noise Temperature of Antenna

Go Antenna Temperature = (Power Density of Antenna)/(Thermal Resistance*Bandwidth)

Total Power of Antenna

Go Total Power of Antenna = Thermal Resistance*Antenna Temperature*Bandwidth

Radiation Intensity

Go Radiation Intensity = Isotropic Radiation Intensity*Directivity of Antenna

Average Radiation Intensity

Go Average Radiation Intensity = Radiation Intensity/Directivity of Antenna

Directivity of Antenna

Go Directivity of Antenna = Radiation Intensity/Average Radiation Intensity

Power Per Unit Bandwidth

Go Power per Unit = Thermal Resistance*Resistor Absolute Temperature

Total Antenna Resistance

Go Total Antenna Resistance = Ohmic Resistance+Radiation Resistance

Radiation Resistance

Go Radiation Resistance = Total Antenna Resistance-Ohmic Resistance

Ohmic Resistance

Go Ohmic Resistance = Total Antenna Resistance-Radiation Resistance

Antenna Gain

Go Antenna Gain = Radiation Intensity/Isotropic Radiation Intensity

Length of Binomial Array

Go Length of Binomial Array = (No of Element-1)*Wavelength/2

Isotropic Radiation Intensity

Go Isotropic Radiation Intensity = Radiated Power/(4*pi)

Antenna Efficiency

Go Antenna Efficiency = Radiated Power/Total Input Power

Total Input Power

Go Total Input Power = Radiated Power/Antenna Efficiency

Duct Height

Go Duct Height = (Maximum Duct Wavelength/0.014)^(2/3)

Maximum Duct Wavelength

Go Maximum Duct Wavelength = 0.014*Duct Height^(3/2)

Radiation Resistance Formula

Radiation Resistance = Total Antenna Resistance-Ohmic Resistance
R_rad = R_t-R_ohm

What is Antenna Resistance?

The power supplied to an entire antenna divided by the square of the effective antenna current measured at the point where power is supplied to the antenna.

How to Calculate Radiation Resistance?

Radiation Resistance calculator uses Radiation Resistance = Total Antenna Resistance-Ohmic Resistance to calculate the Radiation Resistance, The Radiation Resistance formula is defined as that part of an antenna's feed point electrical resistance that is caused by the radiation of electromagnetic waves from the antenna. In radio transmission, a radio transmitter is connected to an antenna. Radiation Resistance is denoted by R_rad symbol.

How to calculate Radiation Resistance using this online calculator? To use this online calculator for Radiation Resistance, enter Total Antenna Resistance (R_t) & Ohmic Resistance (R_ohm) and hit the calculate button. Here is how the Radiation Resistance calculation can be explained with given input values -> 2.25 = 4.75-2.5.

FAQ

What is Radiation Resistance?

The Radiation Resistance formula is defined as that part of an antenna's feed point electrical resistance that is caused by the radiation of electromagnetic waves from the antenna. In radio transmission, a radio transmitter is connected to an antenna and is represented as R_rad = R_t-R_ohm or Radiation Resistance = Total Antenna Resistance-Ohmic Resistance. Total Antenna Resistance is defined as the electrical resistance of an antenna is composed of its ohmic resistance plus its radiation resistance & Ohmic resistance is the material's opposition to the flow of electric current.

How to calculate Radiation Resistance?

The Radiation Resistance formula is defined as that part of an antenna's feed point electrical resistance that is caused by the radiation of electromagnetic waves from the antenna. In radio transmission, a radio transmitter is connected to an antenna is calculated using Radiation Resistance = Total Antenna Resistance-Ohmic Resistance. To calculate Radiation Resistance, you need Total Antenna Resistance (R_t) & Ohmic Resistance (R_ohm). With our tool, you need to enter the respective value for Total Antenna Resistance & Ohmic Resistance 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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