Power in Watts expressed in dB
Power in Watts expressed in dB
Power in
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 in
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
