RF Power & EIRP Estimator

Radio

Output power

Frequency (MHz)

Connector/inline losses (dB)

Feedline Loss

Enter total RF path loss manually

Leave off to auto-compute from cable + length

Cable type

Length

Units

Loss is interpolated vs. frequency using typical datasheet values (dB per 100 ft).

Power Amplifier (optional)

Enable amplifier

Gain (dB)

Max output (dBm, optional)

Backoff (dB)

If Max output is set, the amplifier stage is clipped to (Max − Backoff).

Antenna

Type

Antenna gain (dBi)

Antenna gain is relative to isotropic (dBi). Pattern, tilt, and polarization losses are not modeled here.

Illustrative radiation pattern

Visual guide only — not a measured pattern.

Radio output (normalized)

–

After amplifier

–

Feedline loss (incl. connectors)

–

Power at antenna feed

–

Antenna gain

–

EIRP

–

EIRP (W)

–

Cable model @ freq

–

—