Differences between ERP and EIRP

[rubdawg]

Hi, I am curious on what ERP is, I understand EIRP and have done searches for ERP with no avail. FOr the application I am working on the specification states "Allowed harmonic ERP (dBm)=-18.2"

I have measured harmonics before using a Spectrum analyzer , is this the same testing that is asked or am I misinterupting this, thanks.

 

[springf2000]

Re: ERP and EIRP

sometimes they are the same thing

 

[pico]

ERP and EIRP

What is the ERP and EIRP stands for?
"I" => Isotopic, no "I" refers to standard dipole. But I can't remember how much gain that dipole has over the isotopic one.

 

[scoppulal]

Re: ERP and EIRP

hi,

I stands for isotropic. it means that the antenna lenght is very very small in respect to the wavelenght.
Imagine it as a radiating point: radiation is the same in any direction.

hope it helps

 

[eirp]

Re: ERP and EIRP

Hi,nice topic for me :twisted:

Yes, ERP stands for standard dipole, it's directivity is say 2.15 dBi (reference to isotropic radiation source)

 

[chihhao]

Re: ERP and EIRP

The value of EIRP looks higher than ERP even though they represent the same thing. So engineer uses EIRP more than ERP.

 

[dd22]

ERP and EIRP

It is just a preference since a lot standards and engineers have chosen one or the other way. The relation is fixed, about 2.1 dB

 

[djalli]

Re: ERP and EIRP

Hi, I am curious on what ERP is, I understand EIRP and have done searches for ERP with no avail. FOr the application I am working on the specification states "Allowed harmonic ERP (dBm)=-18.2"

I have measured harmonics before using a Spectrum analyzer , is this the same testing that is asked or am I misinterupting this, thanks.

Possibly this may help somewhat dealing with satellite communication literature to be a reference.

djalli!