I need 2-8GHz quadrature modulator with DC IF. I think to use HMC8193 quadrature mixer as modulator (LO input as RFin and RF input as RFout of modulator). Is it possible to apply +10..+20 dBm (or equivalent DC voltage) to IF1 or IF2 input and get constant conversion loss from LO to RF in -30..+10 dBm power range? What approximate IP1dB level (by LO input) and LO-RF conversion loss (equal frequencies at DC IF) should I expect in this case?
We haven't tested this scenario before but the LO needs a constant power level of +18dBm to operate.
No that wouldn't be the case here as the IF is DC so the diodes/FETs are not switching on and off so no mixing will happen.