Hello AviMagos ,
Did you resolve this issue ?
Using only one IF port without the hybrid would mean that you would have 3dB additional conversion loss. The hybrid is needed for image rejection. However you would lose the image rejection capability if using only one IF port.
I think for your application…
The HMC218B is a passive mixer. For all passive mixers, unless stated otherwise, the conversion loss equals the noise figure.
This part is EAR99. The attached RFIC selection guide lists the ECCN codes for all of ADI's RF products.
You need a PLL which drives a frequency doubler which drives an amplifier. Possible choices might be ADF4371 (PLL), HMC1105 (frequency doubler) and HMC7229 (amplifier). These are not the only choices.