The EIRP calculator allows you to determine the effective isotropically radiated power of an RF system, taking into account the transmitted power, cable and connector losses, and antenna gain.
This tool is useful for RF engineers and technicians to optimize the performance of wireless communication systems.
Formula used
EIRP (dBm) = Transmitted Power (dBm) – Total Losses (dB) + Antenna Gain (dBi)
Explanation
The formula shows that the EIRP depends on three main parameters: transmitted power, system losses and antenna gain.
The transmitted power can be expressed in dBm, dBW or Watts, and must be converted to dBm for calculation.
Losses represent the attenuation caused by cables and connectors, while antenna gain indicates how much the antenna amplifies the signal in the desired direction.
The EIRP can then be converted to dBW or Watts as needed.
Calculation example
For a system with:
Transmitted power = 10 dBm , Total losses = 2 dB , Antenna gain = 8 dBi :
EIRP (dBm) = 10 – 2 + 8 = 16 dBm
EIRP (dBW) = 16 – 30 = -14 dBW
EIRP (Watts) ≈ 0.04 W
Benefits and Use
- Allows you to evaluate the effective radiated power of an RF system.
- Helps size and optimize wireless communication systems.
- Useful to ensure that the power emitted complies with regulatory standards and limits.
- Facilitates the choice of RF components and the appropriate antenna to achieve the desired range.
