What is the average power density at the load


Assignment:

1. A power (Pv)dBm = -16 dBm is measured across a resistive load RL = 500Ω for the signal vL(t) = V0 sin (2Πƒ0t) with frequency f0 = 500 Hz. Express the signal amplitude V0 in V and dBm, where(V0) dBM = 20 log10 (V0)mV.

2. Let the source PSD of a two-terminal device, closed on a load, be

Pvi(ƒ) = V0|ƒ/B| rect (ƒ/2B)

With (V0)v2 /KHz = 2V2/kHz and B = 750Hz. Knowing that the source impedance is ZS = 100 + j50 and that the system is matched, what is the average power Pv and the power density pv(f ) at the load?

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