Hi Riffad
I have played a little with the AD831 mixer and in general it is a nice device, I used a couple of the mixers in a dual conversion receiver and they performed okay.
Being an active device there is no conversion loss unlike a typical Level 7 diode ring mixer which exhibits 5dB loss.
The AD8361 device does have a fairly high noise figure of 10.3dB but the IP3 is quoted as +24dBm which is better than a diode ring mixer @ 15dBm
One thing to be aware of is the local oscillator level which must be set correctly, to much drive and you will end up with distortion products.
I would certainly buy one of the ready made mixer boards using this device as it is a great module to have to hand.
I have built H-Mode mixers and am using one as the 1st mixer stage in my Irwell transceiver and that has an IP3 of 45 to 50dBm so it really is in a different league.
Hope this helps
Regards
Andy (G6LBQ)
