Printed antenna dimention H/W/T

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Sun, 2018-06-24 13:08

Offer.Sharabi@p...

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Printed antenna dimention H/W/T

I would like to use DA14580_QFN40 with printed antenna according AN-B-027 paragraph 5.3 “Reduced Size Printed IFA, 1 mm Substrate, Variant 2”.
My board is 1mm , 4 layers FR-4 , all layers are 1oz .
What should be the antenna’s dimensions trace to achieve 50ohm impedance.

Thanks.

附件:

AN-B-027

Device:

DA14580

星期四,2018-06-28 16:02

PM_Dialog

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Hi Offer.Sharabi@powermat.com

HiOffer.Sharabi@powermat.com,

The AN-B-027 document states the overall dimensions of this antenna are 8.2 mm x 16.5 mm. When using a 1mm thick FR-4 substrate, and using the listed dimensions, the antenna impedance will be close to 50 Ohm. To correct for de-tuning/mismatch that could be caused by the plastic casing when nearby, or metal e.g. battery, a matching filter close to the antenna is required. This is the recommended matching for your custom board.

Thanks, PM_Dialog