Hi, I'm sorry if my question is too basic. I want to build FMCW radar with range 4-7GHz. Now I'm looking for the downconverter with the expected IF signal (LO-RF) is at 10-100 kHz. And I found HMC525ALC4.
But based on its datasheet, it mentions about external 90º Hybrid. Is it compulsory for me if I just need one IF port? What happen if I terminate one port with 50ohm dummy load and use another IF port directly without external 90º Hybrid?
Or, do you have any recommendation components either for the 90º Hybrid or the downconverter mixer?
Yes you could 50 ohm terminate an IF port and use the other IF port... Or better you could use any double balanced mixer from our portfolio:
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…