The VCO in the ADF4360-7 can only cover a frequency range with Fmax/Fmin < 1.2. The exact centre frequency is set using Lext. So whilst the ADF4360-7 can be used over the entire frequency range, any individual design cannot cover a frequency range with Fmax/Fmin > 1.2.
See datasheet:
P4: VCO Frequency Range max = 1.2
P22: Choosing the Correct Inductor Value