Power in Watts expressed in dB

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Power in Watts expressed in dB

Power in Watts expressed in dB

dB = 10 log (Pout/ Pin)

where dB is the power expressed in Decibel

Pout is the output power

Pin is the input power in reference to 1 watt

Power inWatts expressed in dBm

dBm = 10 log (Pout/ Pin)

where dB is the power expressed in Decibel

Pout is the output power

Pin is the input power in reference to 1 milliwatt

dBd to dBi

dBi = dBd + 2.15

where dBd is a unit to measure antenna gain in reference to a loss less

half-wave dipole antenna

dBi is a unit to measure antenna gain in reference to an isotropic or

ideal antenna

ERP to EIRP

EIRP = ERP + 2.15

Where ERP is the Effective Radiated Power. It is the transmitted power

with respect to a dipole antenna within a given geographic area.

EIRP is the Effective Isotropic Radiated Power. It is the

transmitted power from an isotropic antenna.

dBW to dBm

dBm = dBW + 30

where dBW is also dB in reference to watts

dBW to dBK

dBK = dBW ?30

where dBK is the power in reference to kilowatts