## How do you calculate the output power of an antenna?

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Express the loss of the antenna in dB. 45% of the power input to the antenna is dissipated as heat. The antenna has an efficiency, η, of 55% and so P2=0.55P1. Loss=P1/P2=1/0.55=1.818=2.60 dB….1.3. 3 Decibels.

Power | Absolute power |
---|---|

0 dBm | 1 mW |

10 dBm | 10 mW |

20 dBm | 100 mW=0.1 W |

30 dBm | 1000 mW=1 W |

## How is RF power calculated?

DC and low-frequency measurements can be calculated by the formula: P=U2/R. Depending in the match between RF or MW source impedance and load impedance, parts of the signal energy is reflected. A waveguide setup makes it very difficult to measure voltage.

**What is ERP of an antenna?**

The effective radiated power (ERP) of an antenna in a specific direction is the power that will need to be supplied to a reference antenna to produce the same power this antenna is producing in this direction.

**Does EIRP include antenna gain?**

It is also called Equivalent Isotropic Radiated Power. It is the output power when a signal is concentrated into a smaller area by the Antenna. The EIRP can take into account the losses in transmission line, connectors and includes the gain of the antenna.

### How is antenna distance calculated?

To calculate the range of an antenna, you multiply the square root of the antenna’s height above water (in feet) by 1.42. The product will equal the antenna’s communication range in miles.

### How is signal power calculated?

The power of a signal is the sum of the absolute squares of its time-domain samples divided by the signal length, or, equivalently, the square of its RMS level.

**Does ERP include antenna gain?**

ERP is simple. It is the output power of the transmitter, plus the gain of the antenna, minus the attenuation and losses incurred by cable runs and connectors in-between the transmitter and antenna.