[SI-LIST] Reference ground plane below ethernet differential pairs - good or bad?

Dear Experts,
      EMI radiated emission is failing in our current ethernet product
design .All the ethernet harmonics are appearing in the emission list. I am
told that removing the reference plane below the ethernet differential pair
signals (RX & TX) will solve this issue. For differential signals reference
plane is not required since the return current flows through the other
conductor. But will the presence of reference plane have negative effect?

Sincerely

K.Balasubramanian
Project Leader - Hardware.

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