LAUNCHXL-CC1312R1: RX/TX impedance

Sorry, I didn't inform that the frequency was 924.0MHz.

Sorry, I should inform the point to measure the impedance.

The point is J7 mounted C37 and removed C36.

Hi,

We prefer to promote the reference design than specifying the load- and source impedances that the chip would like to see. 

Providing the fundamental load impedance is only one parameter that should be considered when designing the filter network. We have had this discussion many times with customers over the years and very rarely an improvement is made from just conjugate match simulations and frequency filtering simulations.

Providing an impedance at 924 MHz is not the optimum way to go. Even if you have a different PCB stackup, then would still use the reference design as a base design.

What is the maximum level of output power you are measuring with your prototype ?

I sincerely appreciate for your reply.

TX power is good, because of its impedance(75+j0 ohm). I set the TX power parameter 12.5dBm,

and the prototype board TX power is 12dBm.

I would like to know the impedance of RX(14+j9 ohm) is right or not.

Are there more suitable matching components values, if the frequncy is limited between 920MHz and 928MHz? If there is a possibility of suitable values, would you please teach me the step to find them?

Best, regards.

Hi,

Have you measured the RX Sensitivity? If it is close to the datasheet performance then you will get minimal (if any) improvements by additional tuning.

Regards,

Zack