Integration Guide

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PAN9028 Bluetooth/Wi-Fi Module 5 RF Path
Module Integration Guide Rev. 1.0 Page 18 of 34
5 RF Path
5.1 External Antenna
Antenna Warning
The PAN9028 is tested with a standard U.FL connector and with the antenna
listed in the “PAN9028 Product Specification”. When integrated into the OEM’s
product, these fixed antennas require installation preventing end users from
replacing them with non-approved antennas.
Any antenna not listed in the “PAN9028 Product Specification” must be tested
to comply with FCC Section 15.203 for unique antenna connectors and with
Section 15.247 for emissions.
The PAN9028 module has a 50 ohm RF pin (SMD pad). Connect an external antenna directly or
via a connector (e.g. U.FL) with RF trace to this RF pin. This RF trace shall be matched to
50 ohm  5.2 RF Trace.
5.2 RF Trace
Ensure that the RF trace impedance is nearly 50 ohm. It is recommended to use a Coplanar
Waveguide with Ground (CPWG) design. The impedance is related to the trace width, the
distances of the trace to the ground layers and the material of the PCB.
The following design recommendation shall be met:
✓ Trace impedance of 50 ohm
✓ Trace length shall not exceed 2 cm
✓ Via fence around the trace
✓ Crossing no other lines (power supply, interfaces, or clock traces)