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Directivity of Antenna Formula

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Directivity of antenna measures the degree to which the radiation emitted is concentrated in a single direction. Check FAQs

D a = \frac{U}{R avg}

D_a - Directivity of Antenna?U - Radiation Intensity?R_avg - Average Radiation Intensity?

Directivity of Antenna Example

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Here is how the Directivity of Antenna equation looks like with Values.

Here is how the Directivity of Antenna equation looks like with Units.

Here is how the Directivity of Antenna equation looks like.

8.6538 = \frac{27}{3.12}

8.6538 = \frac{27W/sr}{3.12W/sr}

8.6538 = \frac{27}{3.12}

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Directivity of Antenna Solution

Follow our step by step solution on how to calculate Directivity of Antenna?

FIRST Step Consider the formula

D a = \frac{U}{R avg}

Next Step Substitute values of Variables

∴

D a = \frac{27W/sr}{3.12W/sr}

Next Step Prepare to Evaluate

∴

D a = \frac{27}{3.12}

Next Step Evaluate

∴

D a = 8.65384615384615

LAST Step Rounding Answer

∴

D a = 8.6538

Directivity of Antenna Formula Elements

Variables

Directivity of Antenna

Directivity of antenna measures the degree to which the radiation emitted is concentrated in a single direction.

Symbol: D_a

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Directivity of Antenna

Radiation Intensity

Radiation Intensity refers to the power radiated per unit solid angle by an antenna in a specific direction.

Symbol: U

Measurement: Radiant IntensityUnit: W/sr

Note: Value can be positive or negative.

Formulas to find Radiation Intensity

Average Radiation Intensity

Average Radiation Intensity is the average component of antenna resistance that accounts for the power radiated into space.

Symbol: R_avg

Measurement: Radiant IntensityUnit: W/sr

Note: Value can be positive or negative.

Formulas to find Average Radiation Intensity

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 Directivity of Antenna?

Directivity of Antenna evaluator uses Directivity of Antenna = Radiation Intensity/Average Radiation Intensity to evaluate the Directivity of Antenna, The Directivity of Antenna formula is defined as measure of the concentration of an antennas's radiation pattern in a particular direction. Directivity of Antenna is denoted by D_a symbol.

How to evaluate Directivity of Antenna using this online evaluator? To use this online evaluator for Directivity of Antenna, enter Radiation Intensity (U) & Average Radiation Intensity (R_avg) and hit the calculate button.

FAQs on Directivity of Antenna

What is the formula to find Directivity of Antenna?

The formula of Directivity of Antenna is expressed as Directivity of Antenna = Radiation Intensity/Average Radiation Intensity. Here is an example- 0.086538 = 27/3.12.

How to calculate Directivity of Antenna?

With Radiation Intensity (U) & Average Radiation Intensity (R_avg) we can find Directivity of Antenna using the formula - Directivity of Antenna = Radiation Intensity/Average Radiation Intensity.

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