Deep Dive into ERP/EIRP Calculations

Introduction

This guide explains how to calculate Effective Radiated Power (ERP) and Effective Isotropic Radiated Power (EIRP).

What are ERP and EIRP?

• ERP (Effective Radiated Power):
  The amount of power that an antenna radiates, taking into account the antenna gain and cable loss.

• EIRP (Effective Isotropic Radiated Power):
  The amount of power that an antenna would radiate if it were an isotropic antenna (an antenna that radiates power equally in all directions).