NXP Semiconductors
JN-RM-2079
QN9090 module development reference manual
JN-RM-2079
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2020. All rights reserved.
Reference manual
Rev. 1.0
— 17 Jan 2020
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Fig 2. QN9090-001-M10 & M13
The device footprint and layout are critical as the RF performance is affected by the
design implementation. For these reasons, use of the NXP recommended RF hardware
reference designs are important for successful board performance. Additionally, the
reference platforms have been optimized for radio performance. Even small changes in
the location of components can mistune the circuit. If the recommended footprint and
design are followed exactly in the RF region of the board, sensitivity, output power,
harmonic and spurious radiation, and range will have a high likelihood of first-time
success.
The following subsections describe important considerations when implementing a
wireless hardware design starting with the device footprint, PCB stack-up, RF circuit
implementation, and antenna selection. The following figure shows an example of a
typical layout with the critical RF section which must be copied exactly for optimal radio
performance. The less critical layout area can be modified without reducing radio
performance.
NOTE:
Exact dimensions are not given in this document, but can be found in the manufacturing
files for the QN9090 modules
4.1 QN9090 device footprint
The performance of the wireless link is largely influenced by the device’s footprint. As a
result, a great deal of care has been put into creating a footprint so that receiver
sensitivity and output power are optimized to enable board matching and minimal
component count. NXP highly recommends copying the die flag exactly as it is shown in
