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NXP Semiconductors
JN-RM-2080
K32W module development reference manual
JN-RM-2080
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© NXP Semiconductors N.V. 2020. All rights reserved.
Reference manual
Rev. 1.0
— 27 Mar 2020
18 of 30
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5. Optimal PCB placement of a module
Where the K32W061/041 device is mounted on a module similar to the NXP K32W061-001-M10
care must be taken when mounting this module onto another PCB.
The area around the antenna must be kept clear of conductors or other metal objects for an
absolute minimum of 20 mm. This is true for all layers of the PCB and not just the top layer. Any
conductive objects close to the antenna could severely disrupt the antenna pattern resulting in
deep nulls and high directivity in some directions.
The diagrams below show various possible scenarios. The top 3 scenarios are correct; ground
plane may be placed beneath K32W061-001-M00 module as long as it does not protrude beyond
the edge of the top layer ground plane on the module PCB.
The bottom 3 scenarios are incorrect; the left-hand side example because there is ground plane
underneath the antenna, the middle example because there is insufficient clearance around the
antenna (it is best to have no conductors anywhere near the antenna), finally the right hand
example has a battery’s metal casing in the recommended keep out area.
Fig 16. PCB placement of a K32W061 module with a printed antenna
