HMC773A: Can we swap LO/IF port?

Question

Hello, 
 Can we use HMC773A by swapping LO/IF port under following condition? 
 For RX; 
 Input RF signal : 18.5GHz, maximum 0dBm 
 Input LO signal : 0.5GHz, +13dBm 
 IF = 18GHz 
 For TX; 
 Input IF signal : 18GHz, maximum 0dBm 
 Input LO signal : 0.5GHz, +13dBm 
 RF = 18.5GHz 
 We understand it is not recommended use and you do not guarantee performance. But, could you please advide us we can do like that use? And what kind of impact to perfomances of HMC773A? 
 Best regards, 
 Akira

ADIApproved · Accepted Answer

Hello Akira, 
 In both cases this probably won't work. 
 For the IF port you're exceeding the IF BW of the mixer and most of your signal is going to be reflected back due to poor return loss at 18GHz. 
 Same goes for the LO port. 0.5GHz is not in the LO BW. Most of the signal is going to be reflected back due to poor return loss. 
 Such poor return loss is probably going to affect the system that you put the mixer in as well. 
 Why can't the LO/IF ports be used as recommended? Are you looking at the HMC773A to be put into a board which has already been designed? 
 Thanks,)

Partner Forums

Partner Libraries

HMC773A: Can we swap LO/IF port?