Possible to fine-tune/offset frequency of radio (nrf51822) in code?

[davman]

Hi,

We're using an off the shelf module with a trace antenna that can't be modified. Measured the module once assembled, and due to surrounding plastic materials, the impedance of the antenna is not 50ohm resulting in the resonance frequency being shifted by ~150MHz.

As this is a fixed offset causing a drop in efficiency, I wonder if it's possible via SoftDevice to compensate to this by offsetting the radio accordingly.

System can run either SD 6.0 or 7.0, Bluetooth LE only.

best david

[davman]

Hi John, I would say the other way around, if a BLE module has been pre-certified and after assembly the radio is skewed slightly, to me it feels more reasonable to tune it back.