Integration Guide

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PAN9028 Wi-Fi/Bluetooth Module 5 RF Path
Module Integration Guide Rev. 1.0 Page 16 of 45
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 regulatory and certification chapter of 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 in the regulatory and certification chapter of 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)