ADL5565 S-Parameters higher than 3GHz?

Dear all,

we are currently using the ADL5565 as a balun alternative from DC to 3GHz and would like to exand it to 6GHz or higher. Unfortunately, the provided S-Parameters file ends at 3GHz and looks somehow weird:

Thus, either the stated input resistance of 100 Ohm and 0.5 pF capacitance from the datasheet is completely wrong, or the S-Parameters are wrong. If you look at the datasheet of the ADL5569, the input should look more like what you expect of R || C:

Is there any chance to get S-Parameters of the ADL5565 higher than 3GHz?

Best regards,

Steve