The balun of nrf51822

[KING JAMES]

I simulated the balun of nrf51822 accroding to the referenced design of nrf51822 on the official website.
However,it showed the differential phase of the balun was not 180 degrees.
Please help me to find a solution,thanks.

[KING JAMES]

Why the parameters of QFAC are different ?

[KING JAMES]

[ketiljo]

The length of the bonding wires are difference due to the larger die of the QFAC (more memory), meaning that the QFAC has shorter bonding wires and hence less series inductance.