My circuit design is followed analog devices suggestion(see as attachment 1 Fig.13)
And It said its bandwidth is about 480MHz.
What I need is a analog multiplier which transfer function W-output=Input1(t)*Input2(t).
And the bandwidth over 100MHz.
But I test the circuit as attachment and the result is showing also in attachments.
The both input is sin(w*t) and the output would be expect be sin(w*t)^2.
But its frequency response seems not enough for my acquirement.
And the output have a phase delay to my input signal when input signal over few MHz.
So Is there improved way to my circuit to solve my problem?