What is the calculation that is used to measure the radiated power of a signal after it has gone through the radio, antenna cable, and antenna?

Question

Options

• AEIRP
• BmW
• CdBm
• DdBi

• A
  94% (49)
• C
  4% (2)
• D
  2% (1)

Explanation

EIRP (Effective Isotropic Radiated Power) is the correct answer because it is specifically the calculation used to measure the total radiated power of a signal after it has passed through the entire transmission path - including the radio (transmitter), antenna cable, and antenna. EIRP accounts for transmitter output power, cable losses, and antenna gain to give a complete picture of the signal's effective strength as it leaves the system.

Why the distractors are wrong:

• mW (milliwatts) is simply a unit of power measurement, not a calculation that accounts for the full transmission path.
• dBm is a unit expressing power relative to 1 milliwatt, used to measure signal strength at a specific point, but it doesn't factor in the entire path including antenna gain.
• dBi measures antenna gain relative to an isotropic radiator, which is only one component of the EIRP calculation, not the full picture.

Memory Tip: Think of EIRP as the "end-to-end" power measurement - it captures Everything In the Radio Path. If a question mentions the radio, cable, and antenna together, EIRP is your answer every time.

No community discussion yet for this question.