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What is the difference between EIRP and ERP Terms ?

Following points summarize major and minor difference between EIRP and ERP terms.
➨EIRP stands for Effective Isotropic Radiated Power where as ERP stands for Effective Radiated Power.
➨In EIRP calculation antenna gain is taken in unit of dBi where as in ERP calculation antenna gain is taken in unit of dBd.
➨EIRP (dBm) can be found by adding 2.15 to ERP value.
➨These are the limits set by regulatory bodies for Radio frequency transmitting devices for various indoor/outdoor wireless technologies such as GSM, LTE, 4G, 5G, LoRaWAN etc.
➨Following are the formula for EIRP and ERP.

EIRP formula ERP formula EIRP vs ERP

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