What is the difference between erp and eirp

A half-wave dipole has a gain of 2. Let us know what you need, we can help find products that meet your requirement. By signing up for our newsletter you agree to our Terms of Service and acknowledge receipt of our Privacy Policy. By creating an account with us you agree to our Terms of Service and acknowledge receipt of our Privacy Policy. Content submitted here will be sent to our editorial team who will review and consider it for publication on the website.

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Popular Categories. Our Network. Follow Us :. The Effective Isotropic Radiated Power EIRP is the apparent power transmitted towards the receiver, if it is assumed that the signal is radiated equally in all directions, such as as a spherical wave emanating from a point source; in other words, the arithmetic product of the power supplied to an antenna and its gain.

Begin by testing the transmitter with a good dummy load and a good calibrated watt meter. Enter that value. Then enter the antenna gain. This calculator is considering only power and antenna gain.

It is the power supplied to an antenna multiplied by the antenna gain in a given direction. If the direction is not specified, the direction of maximum gain is assumed and the type of reference antenna should be specified.

It is also the product of the power supplied to the antenna and its gain relative to a half-wave dipole in a given direction and it is the effective radiated power of a transmitter with antenna, transmission line, duplexers, etc. Also, it is the power that would be necessary at the input terminals of a reference half-wave dipole antenna in order to produce the same maximum field intensity.

ERP is usually calculated by multiplying the measured transmitter output power by the specified antenna system gain, relative to a half-wave dipole, in the direction of interest. As a matter of definition, dB is the accepted abbreviation for decibel s. One tenth of the common logarithm of the ratio of relative powers, equal to 0. Further, dBW is the abbreviation for dB referenced to one watt. For a better experience, please enable JavaScript in your browser before proceeding.

You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter rubdawg Start date Sep 14, Status Not open for further replies. But I can't remember how much gain that dipole has over the isotopic one. Imagine it as a radiating point: radiation is the same in any direction.

The relation is fixed, about 2. Click to expand Similar threads B. RF, Microwave, Antennas and Optics. Performance differences between open and shorted stubs Started by E-goe May 17, Replies: 8.