BL5340PA DVK internal antenna low range

[valeriy_simakov]

config_dk.rar

Hi! 

I'm using Nordic NRF5340 DK and BL5340PA DVK.(Laird Connectivity BL5340PA Development Kit, https://github.com/LairdCP/bl5340pa_manifest)

1. Laird Connectivity BL5340PA Development Kit 
2. nRF5340 DK (https://www.nordicsemi.com/Products/Development-hardware/nrf5340-dk/getstarted)​​​​​​​​​​​​​​

How my firmware works. 
It sends 6400 bytes of data every 100ms over BLE for 10-30sec. 

I tested the same code on different boards and got the following results in speed and quality:

1. larid dk, 500kbps, on the distance about 0.5m-1m we have unstable quality and data doesn’t pass through a person.
2. nordic dk, 500kbps, on the distance about 5m we steel have good quality and person isn’t a hindrance to data. ​​​​​​​

So I'm stuck at this stage, what is the reason for such poor quality of BL5340PA.
I also attached the configuration files of my project for each board, also CMakeLists.txt (for bl5340pa, as example) (config_dk.rar). 

Could you please help me to figure it out?

 

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[Simonr]

Hi

Have you done any configuration for the onboard PA (power amplifier) here, or is it not enabled at all? On the nRF5340 DK we don't have the nRF21540 LNA on the DK, so if the sample isn't configured for this, that might be why you're having some instability. Other than that I don't have much experience with the BL5340PA, it would be a good idea to ask Laird if they have any suggestions as to why the antenna doesn't perform as expected.

Best regards,

Simon