Antenna Switching for Bluetooth Direction Finding

[ian_student]

Hi

I am currently trying to get the antenna switching working on the nRF52833 DK

I have an SPDT RF swtich is this pe42423

1.I want to use for switching.But I don't know how to connect the pins?

2.change Antenna there code where?

I am learning for the first time, please advise.

Very Very Thanks

[Elfving]

Hello,

1.I want to use for switching.But I don't know how to connect the pins?

I am not familiar with this product but I am not if this is useable, being designed for WiFi. Do you have an Antenna Matrix as well?

2.change Antenna there code where?

I am not sure if I understand what you are asking here? You can find the direction finding code in the SDK. For more info see here.

Regards,

Elfving

[ian_student]

HI 

1.This product is indeed designed for wifi

I try to use it for multi-antenna Bluetooth Direction Finding, But I don't know if this is possible

2.What I want to know is in what file should I control the GPIO
The documentation provided was quite helpful! Thanks for that

 

[Elfving]

ian_student said:

I try to use it for multi-antenna Bluetooth Direction Finding, But I don't know if this is possible

Well I guess it would depend on how you intend to use it. For the main antenna switching in order to calculate the I/Q values it doesn't sound like something i would recommend. Though I guess there might be other contexts it could be used for. Do you have an Antenna Matrix?

ian_student said:

2.What I want to know is in what file should I control the GPIO

No problem. That documentation is mainly about our code. For general info on direction finding i would recommend you to take a look at our whitepaper.

Regards,

Elfving

[ian_student]

HI

my purpose is
Observe the I/Q change after switching the antenna

I don't have the antenna matrix you recommend. 

if this can be done my purpose i will buy it!

I can’t thank you enough for helping me.

[Elfving]

Hello!

No problem at all!

The issue is that you would need the antennas to be close, and a known distance apart. I don't think simply using any couple of antennas will be enough. You can look into the Insight SiP Antenna Matrix if you want to, as it should work well with our code. 

I should also mention that if you are planning on calculating angles as well, it can be very difficult to create an accurate angle algorithm. This is not something we provide, nor something we can help you with. 

Regards,

Elfving