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Hi everyone I need your help to understand this phase response would you please share your ideas?

ALI
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1 Answers1

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The phase response has not been fully unwrapped. See, for example, matlab's unwrap function.

The issue is the phase is a continuous function, but it has probably been extracted from a complex number using the arctangent. Even the atan2 function in matlab only returns a number between -180$^\circ$ and +180$^\circ$.

After application of the unwrap function, the phase response will look much better and not exhibit as many "ripples".

For more explanation, see this question and its answers.

Peter K.
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