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RF & WirelessInternubiquitous

Friis Transmission Equation: Pr/Pt = Gt·Gr·(λ/4πd)²

Updated 18 May 2026

Contents & prerequisites

Prerequisites

Free-Space Path Loss: FSPL = (4πd/λ)²

Unlocks

Link Budget: EIRP, Path Loss, Sensitivity, Margin

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Friis Transmission Equation: Pr/Pt = Gt·Gr·(λ/4πd)²

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Link Budget: EIRP, Path Loss, Sensitivity, Margin

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