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Effective Path Length Formula

GoEffective Path Length using Reduction Factor Formula

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Effective Path Length refers to the total distance that a radio signal travels between a transmitter and a receiver, taking into account the effects of multipath propagation. Check FAQs

L eff = \frac{A}{α}

L_eff - Effective Path Length?A - Total Attenuation?α - Specific Attenuation?

Effective Path Length Example

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With units

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Here is how the Effective Path Length equation looks like with Values.

Here is how the Effective Path Length equation looks like with Units.

Here is how the Effective Path Length equation looks like.

12 = \frac{360}{0.03}

12km = \frac{360dB}{0.03dB}

12 = \frac{360}{0.03}

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Effective Path Length Solution

Follow our step by step solution on how to calculate Effective Path Length?

FIRST Step Consider the formula

L eff = \frac{A}{α}

Next Step Substitute values of Variables

∴

L eff = \frac{360dB}{0.03dB}

Next Step Prepare to Evaluate

∴

L eff = \frac{360}{0.03}

Next Step Evaluate

∴

L eff = 12000m

LAST Step Convert to Output's Unit

∴

L eff = 12km

Effective Path Length Formula Elements

Variables

Effective Path Length

Effective Path Length refers to the total distance that a radio signal travels between a transmitter and a receiver, taking into account the effects of multipath propagation.

Symbol: L_eff

Measurement: LengthUnit: km

Note: Value should be greater than 0.

Formulas to find Effective Path Length

Total Attenuation

Total Attenuation refers to the reduction in signal strength or intensity as a signal travels through a medium, often due to factors like absorption, scattering, and diffraction.

Symbol: A

Measurement: SoundUnit: dB

Note: Value can be positive or negative.

Formulas to find Total Attenuation

Specific Attenuation

Specific attenuation refers to the loss of signal power due to various atmospheric phenomena that affect the transmission of electromagnetic waves between a satellite and an Earth station.

Symbol: α

Measurement: SoundUnit: dB

Note: Value can be positive or negative.

Formulas to find Specific Attenuation

Other Formulas to find Effective Path Length

Go Effective Path Length using Reduction Factor

L eff = L slant \cdot r p

Other formulas in Radio Wave Propagation category

Go Earth Station Altitude

h o = h rain - L slant \cdot \sin (∠θ el)

Go Rain Height

h rain = L slant \cdot \sin (∠θ el) + h o

Go Reduction Factor using Slant Length

r p = \frac{L eff}{L slant}

Go Slant Length

L slant = \frac{L eff}{r p}

How to Evaluate Effective Path Length?

Effective Path Length evaluator uses Effective Path Length = Total Attenuation/Specific Attenuation to evaluate the Effective Path Length, The Effective Path Length generally refers to the distance that a signal or wave travels through a medium, accounting for any deviations or variations from a straight-line path. Effective Path Length is denoted by L_eff symbol.

How to evaluate Effective Path Length using this online evaluator? To use this online evaluator for Effective Path Length, enter Total Attenuation (A) & Specific Attenuation (α) and hit the calculate button.

FAQs on Effective Path Length

What is the formula to find Effective Path Length?

The formula of Effective Path Length is expressed as Effective Path Length = Total Attenuation/Specific Attenuation. Here is an example- 0.000667 = 360/0.03.

How to calculate Effective Path Length?

With Total Attenuation (A) & Specific Attenuation (α) we can find Effective Path Length using the formula - Effective Path Length = Total Attenuation/Specific Attenuation.

What are the other ways to Calculate Effective Path Length?

Here are the different ways to Calculate Effective Path Length-

Effective Path Length=Slant Length*Reduction Factor

Can the Effective Path Length be negative?

No, the Effective Path Length, measured in Length cannot be negative.

Which unit is used to measure Effective Path Length?

Effective Path Length is usually measured using the Kilometer[km] for Length. Meter[km], Millimeter[km], Decimeter[km] are the few other units in which Effective Path Length can be measured.

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