Rf Path; External Antenna; Rf Trace - Panasonic PAN9520 Integration Manual

Embedded wi-fi module

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PAN9520 Wi-Fi Module

5 RF Path

Antenna Warning

The modular approval of the PAN9520 is only valid if the on-board antenna is

used. Other antennas have not been certified. OEMs must test the compliance

of the product by themselves, if other antennas are used in the end product.

The PAN9520 has a 50  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 

 5.2 RF

Trace.

Ensure that the RF trace's impedance is close to 50 . It is recommended to use a Coplanar

Waveguide with Ground (CPWG) as RF trace. 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 must be met:

✓ The trace impedance is 50 .

✓ The trace length is not exceeding 2 cm.

✓ The Via fence is around the trace.

✓ No other lines are crossed (power supply, interfaces, or clock traces)

Example RF Trace of the PAN9520 ETU

On the PAN9520 ETU (ENW49D01AZKF), the module's RF pad is connected to an U.F.L.

connector. As an example, this RF trace is described in the following. The trace is shown in the

figure below (red marked). It can be observed that it is surrounded by a via fence as

recommended.

Module Integration Guide Rev. 1.1

5 RF Path

Page 14 of 44

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