AWR2944EVM: Antenna layout

Arie Rudnitsky

Intellectual 660 points

Part Number: AWR2944EVM

Hi,

at the EVM PCB arround the antenna there is a large clean of elements area:

Please explain why it is needed and what is the minimal required size of such area for our prototype PCB design

Kind regards,

Arie

9 months ago

0 Ali Syed 9 months ago

TI__Expert 8450 points

Hi Arie,

Thanks for your query. Someone will reply ASAP.

regards,

Ali

0 Arie Rudnitsky 9 months ago in reply to Ali Syed

Intellectual 660 points

Thank you. Will be happy to get an accurate and precise answer as we are at the stage of designing our product PCB

0 E. Shareef 9 months ago in reply to Arie Rudnitsky

TI__Mastermind 20070 points

This is a high performance antenna.

The antenna is specifically designed and tuned to operate within the 76-81 GHz frequency band in the context of the surrounding PCB material and the absence of other objects. Any objects nearby can change its electrical characteristics (impedance, resonance frequency) and detune it, reducing efficiency and range.

Eventually we needed space to ad dthe AUTO PHY on the EVM so we used the top left space.

0 Arie Rudnitsky 9 months ago in reply to E. Shareef

Intellectual 660 points

Hi,

thank you for your answer.

Please explain what is AUTO PHY, where can I read about the concept?

So, from what you have written, it seems that I need the whole area around to be clean from elements, like in the figure below (framed in green), or still we can somehow to reduce it, for example by putting the antenna adjacent to PCB edge. If we can reduce, can you please draw upon the figure the required area limits?

+1 E. Shareef 8 months ago in reply to Arie Rudnitsky

TI__Mastermind 20070 points

AUTO PHY is a interface IC on the PCB that handles the physical transmission and reception of data over Ethernet cables. This IC is located on top left side of the EVM.

You can potentially have an EVM where the antenna sits on the corner as referenced in below image.

0 Arie Rudnitsky 8 months ago in reply to E. Shareef

Intellectual 660 points

Please clarify, was this tested or it is just your considerations?

I mean, once we build our own PCB there will be no way back if this area is actually required

0 E. Shareef 8 months ago in reply to Arie Rudnitsky

TI__Mastermind 20070 points

I will always encourage you to run simulations before proceeding with a build. TI EVM is tested with the full board and not the cutout in blue. This is an educated recommednation.

-E. Shareef

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AWR2944EVM: Antenna layout