In my application (schematic attached) I use the ADF4150 as
the frequency synthesizer and the ADF4151 as the VCO for spur reduction. I want
to use the ADF4355 as the VCO as I want to generate frequencies to 6 GHZ. What
is the risk? Does the loop filter need to change? What recommendations would
your apps engineer recommend? Yes I realize that the harmonic filter in the
powerpoint is a 900 MHz filter but I use the frequency synthesizer circuit in
several places so I would change the harmonic filter. The step size of the
filter is 2 KHz.