Can i use 2 NRF52832 chip in single PCB one as a scanner and one as an advertiser? which kind of issue in antenna radiation?

[RAHUL P PATEL]

Can i use 2 nos   NRF52832 BLE chip on single PCB , PCB size is 30x50 mm , 

1 chip for scanner 

2 for advertising

3.If yes what is the position for antenna of both Chip.?

4.Which kind of issue in radiation?

[Andreas]

Hi,

 

You can, but it might not be a good idea. When advertising the advertisers will likely block the scanner from receiving anything else. Place the antennas as far apart as possible and according to the datasheets of the antennas.

If transmitting at the same time there will likely be intermodulation products, it would be smart to build in some coexistence in your application.

 

Best regards,

Andreas

[RAHUL P PATEL]

thank you Andreas,

I got your First point, but I  am not getting your second point.

Andreas said:

If transmitting at the same time there will likely be intermodulation products, it would be smart to build in some coexistence in your application.

Please describe it .

Thank you.

[Andreas]

Hi,

 

When transmitting at the same time, the signal from radio 1 will be picked up by radio 2, and radio 2 will then transmit an intermodulated signal consisting of at the sum and difference frequencies (f1 + f2 and f1 - f2). This might violate regulatory requirements, and for designs with multiple transmitters you are required to test for it unless you have implemented some coexistance such that they do not transmit at the same time.

 

Best regards,

Andreas