does hmc733 have 1/2 harmonic 1/4 harmonic
and if i want to lock from 10G~20G ,is a single loop filter can lock ?
There are no sub-harmonics (1/2 or 1/4) on the HMC733. For most PLL devices, you may need to divide the 10 - 20GHz signal down with an external divider to get within the operating frequency range of the PLL.
Also, you can use a single loop filter. To keep the loop bandwidth roughly consistent across the band, you may need to calculate the loop filter at mid band and then adjust charge pump current as the Kvco tuning sensitivity changes.