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This is part 9 of the LoRa/LoRaWAN tutorial.
In this video series different topics will be explained which will help you to understand LoRa/LoRaWAN.
It is recommended to watch each video sequentially as I may refer to certain LoRa/LoRaWAN topics explained earlier.
In this video I will explain what EIRP and ERP are.
The Effective Isotropic Radiated Power (EIRP) is the total power radiated by a hypothetical isotropic antenna in a single direction.
The Effective Radiated Power (ERP) is the total power radiated by an actual antenna relative to a half-wave dipole rather than a theoretical isotropic antenna.
EIRP = Tx power (dBm) + antenna gain (dBi) - cable loss (dBm)
For example: EIRP = 20 + 10 - 5 = 25 dBm
ERP = Tx power (dBm) + antenna gain (dBd) - cable loss (dBm)
For example: ERP = 20 + 7.85 - 5 = 22.85 dBm
Relationship EIRP and ERP:
EIRP (dBm) = ERP (dBm) + 2.15
What is the purpose of ERP and EIRP?
RF transmitting systems must adhere to certain rules set by the regulatory bodies such as FCC or ETSI.
One of these rules: radio devices must not exceed certain ERP or EIRP values set by these regulatory bodies.
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LoRa/LoRaWAN tutorial 9: EIRP and ERP
Теги
LoRa/LoRaWAN tutorial 9 EIRP and ERPLoRa tutorial 9LoRaWAN tutorial 9LoRaLoRaWANEffective Isotropic Radiated PowerEIRPEffective Radiated PowerERPEIRP equationERP equationEIRP hypothetical isotropic antennaERP half wave dipole antennaEIRP antenna gain dBiERP antenna gain dBdEIRP ERPpurpose ERP and EIRP