What is meant by EIRP in satellite communication?
Equivalent isotropic radiated power, EIRP, is the total radiated power from a transmitter antenna times the numerical directivity of the antenna in the direction of the receiver, or the power delivered to the antenna times the antenna numerical gain.
What factors determine the EIRP required by a station in earth operation?
This apparent power is dependent on two factors: the total power output and the radiation pattern of the antenna – how much of that power is radiated in the desired direction.
How is satellite downlink EIRP calculated?
For a leased 2 MHz slot, out of a transponder bandwidth of 36 MHz, the available downlink EIRP will be +37.5 -10 log(36/2) = +25 dBW . This assumes that the total power is more or less evenly divided according to bandwidth.
What is the difference between EIRP and ERP?
EIRP is the Effective isotropic radiated power is the total power radiated by a hypothetical isotropic antenna in a single direction. ERP is Effective Radiated Power is the total power radiated by an actual antenna relative to a half-wave dipole rather than a theoretical isotropic antenna.
Why is EIRP important?
EIRP is vital to determine transmitter power and beam verification of a 5G base station. The reason is that active antenna systems operate much differently than the isotropic antennas used for many years in traditional cellular applications.
What is a good antenna gain?
If you mount a TV antenna on your roof, and know the tv broadcast antennas are to the south (for example, on some hill south of the city), then it is preferred to have a high gain antenna. Antennas with gain of at least 12-15 dB are preferred.
How do you solve EIRP?
Calculation: E.I.R.P. = 16 dBm + 8 dBi – 3,2 dB – 1 dB = 19,8 dBm (i.e. the power level meets the requirements – less than 20 dBm).
What is the correct expression for EIRP?
Since the input power to the antenna was 0 dB and the simulated far-field gain was = 15.44 dBi, the reference EIRP can be calculated as EIRP = = 15.44 + 0.0 = 15.44 dB.
At what value of output back off in dB does the satellite operate?
The satellite power amplifier characteristics specify that for every dB of Input back-off the Output Back-off changes by 0.5 dB.
What do you mean by EIRP a satellite downlink at 12 Ghz operates with a transmit power of6 W and an antenna gain of 48.2 dB calculate the EIRP in dBW?
Answer is “56 dBW”
What is the maximum transmit power for 2.4 Ghz WiFi?
100mW
By default almost all WiFi access points transmit at full power (100mW on 2.4GHz). This gives maximum coverage and users see a good signal (“full bars”). However, there are good reasons to turn down the transmit power to a fraction of the maximum.
What is equivalent radiated power?
The Equivalent Radiated Power (ERP) is used to analyze the acoustic signature of the system. The ERP results estimate the radiated structure sound power from vibrating structural surface (it is only scoped to surfaces). The main workflow is based on ANSYS/Maxwell and Harmonic response.
What is the saturated EIRP of a satellite transmit downlink?
Referring to the satellite transmit downlink coverage pattern, the saturated EIRP on each contour will be specified in units of dBW . For example +45 dBW in the area of the beam centre and +42 dBW at the -3 dB contour.
What do the lines on the EIRP MAP Mean?
The lines are marked with EIRP values like 45 dBW, 44 dBW, 43 dBW, 42dBW etc in descending order from the maximum, normally about in the middle of the beam. The highest number, towards the middle of the coverage map shows where the downlink beam is strongest and most easy to receive.
What is effective isotropic radiated power (EIRP)?
An alternate parameter that measures the same thing is effective (or equivalent) isotropic radiated power (EIRP). Effective isotropic radiated power is the total power that would have to be radiated by a hypothetical isotropic antenna to give the same signal strength as the actual source in the direction of the antenna’s strongest beam.
What is EIRP density and how to reduce it?
Because EIRP density is the combination of the power density supplied to the antenna and the antenna gain, an applicant could comply with the regulations by just reducing the input power density into the antenna.