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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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VSWR - Return Loss - Γ Conversions

These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). A table of convenient values are presented at the bottom.

Here is a JavaScript calculator for VSWR / Return Loss / Reflection Coefficient / Mismatch Error / Improvement

Complex Impedances: Impedance (Z) to reflection coefficient (gamma) conversion equation - RF Cafe Cascaded VSWR - RF Cafe

VSWR to return loss to conversion equation - RF Cafe

Reflection coefficient (gamma) to return loss to conversion equation - RF Cafe

Return loss to VSWR to conversion equation - RF Cafe

Reflection coefficient (gamma) to VSWR to conversion equation - RF Cafe

Return loss to reflection coefficient (gamma) conversion equation - RF Cafe

VSWR to reflection coefficient (gamma) conversion equation - RF Cafe

Note: VSWR values were used to calculate the other two related values (rounded to 3 significant places)

RL (dB)	VSWR	Γ	RL (dB)	VSWR	Γ	RL (dB)	VSWR	Γ	RL (dB)	VSWR	Γ
46.1	1.01	0.00498	25.7	1.11	0.0521	18.0	1.29	0.126	8.0	2.32	0.398
40.1	1.02	0.00990	24.9	1.12	0.0566	17.0	1.33	0.141	7.0	2.61	0.447
36.6	1.03	0.0148	24.3	1.13	0.0610	16.0	1.38	0.158	6.0	3.01	0.501
34.1	1.04	0.0196	23.7	1.14	0.0654	15.0	1.43	0.178	5.0	3.57	0.562
32.3	1.05	0.0244	23.1	1.15	0.0698	14.0	1.50	0.200	4.0	4.42	0.631
30.7	1.06	0.0291	22.6	1.16	0.0783	13.0	1.58	0.224	3.0	5.85	0.708
29.4	1.07	0.0338	21.7	1.18	0.0826	12.0	1.67	0.251	2.0	8.72	0.794
28.3	1.08	0.0385	20.8	1.20	0.0909	11.0	1.78	0.282	1.0	17.4	0.891
27.3	1.09	0.0431	20.0	1.22	0.100	10.0	1.92	0.316	0.5	34.8	0.944
26.4	1.10	0.0476	19.0	1.25	0.112	9.0	2.10	0.355	0.0	Infinity	1.00

Related Pages on RF Cafe

- VSWR - Return Loss - Γ Conversions

- VSWR <--> Return Loss <--> Γ Conversion Calculator

- VSWR Mismatch Errors

- VSWR Reduction by Matched Attenuator

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