Hi Firstdragon,
Although in theory it shouldn’t do any harm, I just don’t quite see the logic in adding another 22 uF on the VDDPA2 trace. If you’re trying to enhance the filtering effect of the ferrite, you’ve already got the 100 nF cap, which is plenty. In fact, in practice, adding that extra 22 uF cap could well compromise the design by complicating what’s already a really congested area to route.
I’ve evaluated enough DW1000 designs to be confident that DWM1004 achieves maximum performance. By all means try out whatever decoupling ideas you have and let us know if you think you get more.