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Antenna Efficiency Formula

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Antenna efficiency is the ratio of power radiated (Prad) by the antenna to the power supplied (Ps) to the antenna. Check FAQs

E t = \frac{P rad}{P i}

E_t - Antenna Efficiency?P_rad - Radiated Power?P_i - Total Input Power?

Antenna Efficiency Example

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With units

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Here is how the Antenna Efficiency equation looks like with Values.

Here is how the Antenna Efficiency equation looks like with Units.

Here is how the Antenna Efficiency equation looks like.

0.0123 = \frac{34}{2765}

0.0123 = \frac{34W}{2765W}

0.0123 = \frac{34}{2765}

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Antenna Efficiency Solution

Follow our step by step solution on how to calculate Antenna Efficiency?

FIRST Step Consider the formula

E t = \frac{P rad}{P i}

Next Step Substitute values of Variables

∴

E t = \frac{34W}{2765W}

Next Step Prepare to Evaluate

∴

E t = \frac{34}{2765}

Next Step Evaluate

∴

E t = 0.0122965641952984

LAST Step Rounding Answer

∴

E t = 0.0123

Antenna Efficiency Formula Elements

Variables

Antenna Efficiency

Antenna efficiency is the ratio of power radiated (Prad) by the antenna to the power supplied (Ps) to the antenna.

Symbol: E_t

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Antenna Efficiency

Radiated 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.

Symbol: P_rad

Measurement: PowerUnit: W

Note: Value can be positive or negative.

Formulas to find Radiated Power

Total Input Power

Total input power is calculated by multiplying voltage (in volts) by current (in amps).

Symbol: P_i

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Total Input Power

Other formulas in Antenna Theory Parameters category

Go Radiation Intensity

U = U o \cdot D a

Go Power Per Unit Bandwidth

P u = k \cdot T R

Go Total Power of Antenna

P a = k \cdot T a \cdot B a

Go Effective Area of Antenna

A e = \frac{k \cdot ΔT}{S}

How to Evaluate Antenna Efficiency?

Antenna Efficiency evaluator uses Antenna Efficiency = Radiated Power/Total Input Power to evaluate 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 evaluate Antenna Efficiency using this online evaluator? To use this online evaluator for Antenna Efficiency, enter Radiated Power (P_rad) & Total Input Power (P_i) and hit the calculate button.

FAQs on Antenna Efficiency

What is the formula to find Antenna Efficiency?

The formula of Antenna Efficiency is expressed as Antenna Efficiency = Radiated Power/Total Input Power. Here is an example- 0.012297 = 34/2765.

How to calculate Antenna Efficiency?

With Radiated Power (P_rad) & Total Input Power (P_i) we can find Antenna Efficiency using the formula - Antenna Efficiency = Radiated Power/Total Input Power.

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