Application HMC8192 as frequency translator

As the HMC8192 is  IQ passive mixer, is it a tru reciprocal device on all ports? I would like to use as frequency shifter . My input would be the LO port, I plan to drive the IF with a "quadrature DDS" and the output would be the RF port. I am expecting that the I/Q DDS inputs would do the "switching". If the input  (LO port) is 35.0000 GHz and I set DDS to 10KHz I would expect an output  of 35.000010 GHz or 34.99999 GHz depending on the I/Q quadrature of the DDS ( IF Inputs). In this application the IF input id the "LO" input and associated drive level. What would be the best performance data to look at on the data sheet.

Thanks

John

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  • +1
    •  Analog Employees 
    on Oct 11, 2019 10:05 PM

    Hi John,

    For this part of the application:

     the input  (LO port) is 35.0000 GHz and I set DDS to 10KHz I would expect an output  of 35.000010 GHz or 34.99999 GHz depending on the I/Q quadrature of the DDS ( IF Inputs)

    If you are driving the LO with 18dBm then it should work.

     

    Switching the LO drive from the LO port to the IF port is not 1 to 1- this is a configuration we have not tested but could work theoretically but there will be lots of performance difference from what is shown in the datasheet.  The IF port is directly connected to the mixer diodes whereas the LO port goes through a balun giving good isolation and 2nd order cancellation for the diode switching.

    Thanks,

    Taz

Reply
  • +1
    •  Analog Employees 
    on Oct 11, 2019 10:05 PM

    Hi John,

    For this part of the application:

     the input  (LO port) is 35.0000 GHz and I set DDS to 10KHz I would expect an output  of 35.000010 GHz or 34.99999 GHz depending on the I/Q quadrature of the DDS ( IF Inputs)

    If you are driving the LO with 18dBm then it should work.

     

    Switching the LO drive from the LO port to the IF port is not 1 to 1- this is a configuration we have not tested but could work theoretically but there will be lots of performance difference from what is shown in the datasheet.  The IF port is directly connected to the mixer diodes whereas the LO port goes through a balun giving good isolation and 2nd order cancellation for the diode switching.

    Thanks,

    Taz

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