kw45 TX RX S11 Measurement

[Lingyinglu]

Hi NXP Team

     I wanna test the  RX/TX S11 parameters of KW45.I have some quetion about the setting.

1. what is the output power of VNA in this case and  why the LNA gain set to maximum ?

2.For the TX ,why here set  ouput power to minimum?If my output power is 10dbm,do I need to set the 

output power to 10dbm when testing the TX S11?

3.For KW45,is there any load-pull doc or parameters to share?

4.Can you share the impedance matching guidance Doc?

[864441397]

How can I set LNA gain to maximum in GenFSK.bin or BB.bin code?

[Christine_Li]

Hi, @Lingyinglu 

1.why the LNA gain set to maximum ?

==>The LNA gain set to maximum is to ensure we have better gain and better return loss in RX mode. In this way, there is least signal loss.

2. For the TX ,why here set  ouput power to minimum?

==> As I know,  we need to protect RF components, do not suggest to set too high output power during test TX mode. But I believe there should be other reasons about setting to minimum. I need to check internally.

3.For KW45,is there any load-pull doc or parameters to share?

==》Sorry， I didn't get your point. Can you give me more details?

4.Can you share the impedance matching guidance Doc?

==> About the impedance matching, please refer to Figure 90. RF matching in page 72 of  AN13228 ( KW45B41Z-EVK RF System Evaluation Report for Bluetooth Low Energy Applications.)

Best regards,

Christine.