SWR ↔ Reflection Coefficient

Convert between voltage standing-wave ratio and reflection-coefficient magnitude.

RF, Radio & Wireless

Convert between voltage standing-wave ratio and reflection-coefficient magnitude.

App id: RF-10. Reference version 1.0.

How to fill it

Leave one field blank. The tool solves the rest.

On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.

Formula

Γ = (SWR − 1) / (SWR + 1)

Inputs

Name	Unit
SWR	`1`
Reflection coefficient	Γ

Outputs

Name	Unit
SWR (hero result)	`1`
Reflection coefficient	Γ

Diagnose

Observations are context. They do not pass or fail a structure. See Diagnose.

Screening bands in the app: Good · Fair · High · Severe.

When	Observation	Severity
`SWR < 1.5`	Good	info
`SWR < 2`	Fair	info
`SWR < 3`	High	caution
`SWR ≥ 3`	Severe	warning

Assumptions

Uses magnitude |Γ|. Does not retain phase.

Provenance

Γ = (SWR − 1) / (SWR + 1). SWR ≥ 1 and |Γ| < 1.