Antenna Efficiency Calculator

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Antenna Theory Parameters

Special Antennas

Wave Propagation

✖Radiated Power is defined as power in watts that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity.ⓘ Radiated Power [P_rad]			+10% -10%
✖Total input power is calculated by multiplying voltage (in volts) by current (in amps).ⓘ Total Input Power [P_i]			+10% -10%

✖Antenna efficiency is the ratio of power radiated (Prad) by the antenna to the power supplied (Ps) to the antenna.ⓘ Antenna Efficiency [E_t]

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Formula

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Antenna Efficiency

Formula

`"E"_{"t"} = "P"_{"rad"}/"P"_{"i"}`

Example

`"0.012297"="34W"/"2765W"`

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Antenna Efficiency Solution

STEP 0: Pre-Calculation Summary

Formula Used

Antenna Efficiency = Radiated Power/Total Input Power
E_t = P_rad/P_i
This formula uses 3 Variables

Variables Used

Antenna Efficiency - Antenna efficiency is the ratio of power radiated (Prad) by the antenna to the power supplied (Ps) to the antenna.
Radiated Power - (Measured in Watt) - Radiated Power is defined as power in watts that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity.
Total Input Power - (Measured in Watt) - Total input power is calculated by multiplying voltage (in volts) by current (in amps).

STEP 1: Convert Input(s) to Base Unit

Radiated Power: 34 Watt --> 34 Watt No Conversion Required
Total Input Power: 2765 Watt --> 2765 Watt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

E_t = P_rad/P_i --> 34/2765

Evaluating ... ...

E_t = 0.0122965641952984

STEP 3: Convert Result to Output's Unit

0.0122965641952984 --> No Conversion Required

FINAL ANSWER

0.0122965641952984 ≈ 0.012297 <-- Antenna Efficiency

(Calculation completed in 00.006 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)

Antenna Efficiency Formula

Antenna Efficiency = Radiated Power/Total Input Power
E_t = P_rad/P_i

What is efficiency of antenna gain?

Antenna Gain is the ratio of power transmitted in a certain direction with a specific reference point. Relation between gain and efficiency is G = e x D where D is the directivity and E if the efficiency Antenna efficiency is how much RF power delivered to the antenna (from radio) is actually transmitted into the air.

How to Calculate Antenna Efficiency?

Antenna Efficiency calculator uses Antenna Efficiency = Radiated Power/Total Input Power to calculate the Antenna Efficiency, The Antenna Efficiency formula is defined as the ratio of power radiated (Prad) by the antenna to the power supplied (Ps) to the antenna. An ideal antenna has 100% antenna efficiency. Antenna Efficiency is denoted by E_t symbol.

How to calculate Antenna Efficiency using this online calculator? To use this online calculator for Antenna Efficiency, enter Radiated Power (P_rad) & Total Input Power (P_i) and hit the calculate button. Here is how the Antenna Efficiency calculation can be explained with given input values -> 0.012297 = 34/2765.

FAQ

What is Antenna Efficiency?

The Antenna Efficiency formula is defined as the ratio of power radiated (Prad) by the antenna to the power supplied (Ps) to the antenna. An ideal antenna has 100% antenna efficiency and is represented as E_t = P_rad/P_i or Antenna Efficiency = Radiated Power/Total Input Power. Radiated Power is defined as power in watts that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity & Total input power is calculated by multiplying voltage (in volts) by current (in amps).

How to calculate Antenna Efficiency?

The Antenna Efficiency formula is defined as the ratio of power radiated (Prad) by the antenna to the power supplied (Ps) to the antenna. An ideal antenna has 100% antenna efficiency is calculated using Antenna Efficiency = Radiated Power/Total Input Power. To calculate Antenna Efficiency, you need Radiated Power (P_rad) & Total Input Power (P_i). With our tool, you need to enter the respective value for Radiated Power & Total Input Power 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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