Hello,
According to the antenna matching guide, asymmetric matching is used for the OM27160 demo board (fr0 = 22MHz).
According to the circuit diagram for the demo board, the filter frequency is 14.5MHz (160nH, 750pF), so symmetrical is used which, according to the antenna matching guide, requires DPC ?
In the source code (I use the MCUXpresso library) nothing indicates that DPC is used.
Does the demo project use DPC and what filter value is recommended?
I designed and calculated my own board with a slightly larger antenna and achieve extremely poor results with a fr0 with 22MHz and only passable with 14.5MHz.
The antenna data was determined with a network analyzer, the matching circuit with the online tool and the PN7160 matching calculator.
Where can I start to get better results? (Increase Q, increase fr0, ...)
How can I restore the default values of the NxpNci_RF_CONF? The default values are not mentioned in the UM.
Thanks very much,
Michael
