VSWR & Return Loss Calculator
Convert between VSWR, return loss, reflection coefficient, and mismatch loss. See reflected vs transmitted power.
Inputs
W
Results
Return Loss
13.98 dB
Reflection Coefficient (Ξ)
0.2
Power Transmitted
96 %
Mismatch Loss0.177 dB
Power Reflected4 %
Reflected Power4 W
Transmitted Power96 W
Impedance (High)75 Ξ©
Impedance (Low)33.3 Ξ©
How to Use This Calculator
- Enter the measured VSWR from your antenna analyzer (ideal = 1.0:1, acceptable <2.0:1).
- Set transmitter input power (W).
- Review return loss (dB), reflection coefficient, mismatch loss (dB), and reflected power percentage.
- VSWR above 2.0:1 reflects >11% power and may damage your transmitter -- investigate antenna connection.
- Use mismatch loss to quantify efficiency reduction from antenna impedance mismatch.
Ad Placeholder
Formula
Ξ = (VSWR - 1) / (VSWR + 1); RL = -20Β·logββ(Ξ)Related Calculators
Coaxial Cable Loss Calculator
Calculate signal attenuation from cable type, length, frequency, and connectors. Compare loss across common coax cable types.
Antenna Gain Calculator
Calculate antenna gain in dBi from aperture dimensions, frequency, and efficiency. Includes beamwidth and effective aperture area.
Dipole Antenna Length Calculator
Calculate half-wave dipole element length from target frequency. Includes quarter-wave, full-wave, and 5/8-wave lengths.
EIRP Calculator
Calculate Effective Isotropic Radiated Power from transmit power, cable loss, connector loss, and antenna gain.
Ad Placeholder