VCO

The VCO product:
which is the best?
Minicircuit or senergymicrowave or the other?
because the price is quite difference.

You get what you pay for. I would trust Synergy befor minicircuits for high performance desings, especially theiir narrow band ceramic resonator types. If you have a mundane design, go for low cost.

Z-comm is also good and cheap