Calculators

Impedance Mismatch to Power Losses			Impedance Mismatch to SWR			SWR to Power Losses
Z0		+ j0 Ω	Z0		+ j0 Ω	SWR		to 1
R1		Ω	R1		Ω
X1		Ω	X1		Ω
Insertion Loss =		dB (S21)	SWR =		to 1	Insertion Loss =		dB (S21)
Return Loss =		dB (S11)				Return Loss =		dB (S11)

NOTE:		NOTE:
Introduction to scattering parameters (S11 and S21):		SWR is always greater than 1 to 1.
microwaves101.com/encyclopedias/s-parameters
		NOTE:
		This calculator converts the SWR across an impedance mismatch to loss. It does not account for the fact that SWR measured though a lossy (i.e., real) cable will always appear lower than the true SWR.