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RF & Wireless — question 3 of 10

Write a real answer. It is graded against the question's rubric, and the mastery movement is computed by the same engine the product uses. Scoring here is deterministic rather than model-written, so this page costs nothing to run and nothing is saved. In a track built from your own posting, the same rubric is graded by the model, which is what produces feedback about your reasoning rather than about coverage.

You connect a VNA to a 50-ohm antenna and measure its input impedance at the operating frequency as 25 + j0 ohms. Calculate the magnitude of the reflection coefficient and the VSWR, then tell me what fraction of your transmit power is actually being reflected back toward the source instead of radiated.

This one resolves to a number. Give the value in the field below and your reasoning in the box — the number is checked exactly, by arithmetic.

(dimensionless)

Units and SI prefixes are understood, including schematic notation: 4k7, 2.2 uF, 1.5e-3 A.

How sure are you?

Being confidently wrong costs more mastery than admitting a guess — that is deliberate, and it is how misconceptions get found.

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