| 摘要 |
An RF power amplifier distortion measurement system measures amplitude and phase distortion of a microwave/RF power amplifier by phase quadrature down-conversion of each of an RF amplifier's input signal and amplified output signals to baseband in-phase (I) and quadrature (Q) components, and performing RF amplifier distortion measurements on these down-converted baseband I and Q signals. The derived error measurement signal is remodulated to RF by phase quadrature up-conversion circuitry to produce an up-converted RF signal that corresponds to the RF distortion component contained in the RF output signal produced by the RF power amplifier.
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