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nRF52840 and nRF21540 schematics

user89347 over 4 years ago

Hej!

Do you have a reference design for nRF52840 and nRF21540, how to connect the ANT signal (nRF52840) to TRX (nRF21540)?

Is it enough to only use a DC block, C1=1.0pF, as Nordic present in the reference design for nRF21540?

Same question goes to the ANT1 matching network to the antenna, L1, L2, C2, C3, will this matching network be sufficient?

Do you have a reference design to share with nRF52840 + nRF21540?

BR Peter

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0 user91187 over 4 years ago

Hi,

You can download the files from our webpage: nRF21540 DB - Downloads - nordicsemi.com

Is it enough to only use a DC block, C1=1.0pF, as Nordic present in the reference design for nRF21540?

A single DC blocking cap is all that is required if the transmission line is matched.

Same question goes to the ANT1 matching network to the antenna, L1, L2, C2, C3, will this matching network be sufficient?

We still recommend that you add a separate matching network for the antenna of your choice.

Regards,
Jonathan
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0 user91187 over 4 years ago

Hi,

You can download the files from our webpage: nRF21540 DB - Downloads - nordicsemi.com

Is it enough to only use a DC block, C1=1.0pF, as Nordic present in the reference design for nRF21540?

A single DC blocking cap is all that is required if the transmission line is matched.

Same question goes to the ANT1 matching network to the antenna, L1, L2, C2, C3, will this matching network be sufficient?

We still recommend that you add a separate matching network for the antenna of your choice.

Regards,
Jonathan
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