Alternatively, you can visit this thread to see how to generate the nrf52840/pca10056 SES project files yourself. This will obviously be beneficial if you choose to experiment with any other mesh examples.
See page 3 of Nordic's measurement file nRf52840 QIAA matching network.pdf (in the .rar compressed file linked in this thread). Their measured value looking into the matching network from the ANT pin is 115.771 - 33.357j ohms.
The impedance of the matching network (0.8pF shunt, 3.9nH series) of the suggested nRF52840 layout is 111.8 - 32.9j with a 50 ohm load, which verified the measured number above. The complex conjugate should be the impedance of the ANT pin.
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