Rf Guidelines; Rf Matching Network For The External Antenna - Digi ConnectCore 6UL Hardware Design Manuallines

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RF guidelines

On the bottom side of the module, there is an LGA pad that can be used to route the RF path from the

QCA6564A wireless chip, out the top of the customer carrier board. A digital switch selects between

routing the RF path either to the U.FL connector or to this LGA pad, named RF_ANT_EXT.

The RF_ANT_EXT comes directly (AC coupled by a cap) from the digital switch because the matching

network implemented at the RF path for the U.FL connector is not present. Instead, it is assumed that

this matching network will be located on the carrier board to compensate for the mismatching

introduced when routing from the LGA pad to the carrier board.

The RF output power at the U.FL connector has been calibrated based on its current matching

network. Via stored tables on the firmware, a flat RF output power over frequency is provided at the

U.FL connector. (That is, the same amount of power is delivered at each frequency over the band.)

ConnectCore 6UL Hardware Design Guidelines

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