Signal analysis apparatus and signal analysis method
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United States of America Patent
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Oct 4, 2022
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app pub date -
Sep 8, 2021
filing date -
Sep 30, 2020
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Abstract
A signal analysis apparatus includes a frequency conversion unit 10 that includes a first local oscillator 11 which outputs a first local oscillation signal SLO1 of a frequency fLO1, a first mixer 12 which generates a first spurious signal of a frequency fSP1, a first BPF 13 of a passed center frequency f0, a second local oscillator 14 which outputs a second local oscillation signal SLO2 of a frequency fLO2, and a second BPF 16 of a passed bandwidth W, and that performs frequency conversion of a measured signal SRF of a frequency fRF (center frequency fc), in which the frequency fLO1 and the frequency fLO2 are shifted using a frequency shift amount Δf that does not establish a relationship of −W/2≤|fSP1−f0±fIF2−Δf|−fIF2≤+W/2.
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