A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss. If the cable is connected to an antenna with 9dBi gain, what is the EIRP at the antenna element?
A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss. If the cable is connected to an antenna with 9dBi gain, what is the EIRP at the antenna element?
To calculate EIRP (Effective Isotropic Radiated Power), we need to convert the transmitter power from mW to dBm first. The formula to convert mW to dBm is: 10 * log10(mW). For 50 mW, the conversion is 10 * log10(50) = 16.99, which is approximately 17 dBm. Next, we account for the cable loss of 3 dB: 17 dBm - 3 dB = 14 dBm. Finally, we add the antenna gain of 9 dB: 14 dBm + 9 dB = 23 dBm. Therefore, the EIRP at the antenna element is 23 dBm.
CONVERT 50mW = (17dB) -3dB + 9dB = 23
Wrong. Correct answer is 23 dBm https://www.everythingrf.com/rf-calculators/eirp-effective-isotropic-radiated-power https://www.rapidtables.com/convert/power/mW_to_dBm.html
The correct answer is 23.