Formula for EIRP conversion calculator
The EIRP (Effective Isotropic Radiated Power) can be calculated using the following formula:
EIRP(dBm) = Transmit Power (dBm) – Total Loss (dB) + Antenna Gain (dBi)
Formula Explanation
This formula calculates the effective isotropic radiated power of a transmitter. The transmit power is first converted to dBm if it is provided in Watts or dBW. The total system losses, including cable and connector losses, are subtracted. Finally, the antenna gain is added to determine the total EIRP, which indicates the power radiated as if the antenna were isotropic.
Uses of EIRP conversion calculator
The EIRP conversion calculator is useful in multiple RF and wireless applications:
- Designing and evaluating wireless communication systems.
- Estimating compliance with regulatory transmission power limits.
- Optimizing antenna performance and link budget calculations.
- Planning RF coverage for broadcast or point-to-point links.
- Educational purposes for RF engineering students and researchers.
Formula Example
Consider a transmitter with the following parameters:
Transmit Power: 20 dBm, Total Loss: 2 dB, Antenna Gain: 8 dBi
Substitute into the formula:
EIRP(dBm) = 20 – 2 + 8 = 26 dBm
Convert to dBW: 26 – 30 = -4 dBW
Convert to Watts: 10^(26/10)/1000 ≈ 0.398 W
This shows that the system effectively radiates 26 dBm, -4 dBW, or approximately 0.398 Watts isotropically.