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In a coherent cascade network, if the third order intercept point of an amplifier is 158 mW and the third order intercept point of a mixer is 5 mW, with an insertion loss of 6 dB, then the third order intercept point of the coherent cascade is:

In a coherent cascade network, if the third order intercept point of an amplifier is 158 mW and the third order intercept point of a mixer is 5 mW, with an insertion loss of 6 dB, then the third order intercept point of the coherent cascade is: Correct Answer 4.4 mW

The third order intercept point of the cascade is given by the expression ((G2 (OIP3’)-1+ (OIP3’’)-1)-1. Substituting the values in the above expression for respective terms, the third order intercept point of the cascade is 4.4 mW.

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