WILCS02UE datasheet(26/71 Pages) MICROCHIP

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WILCS02IC and WILCS02 Family

Device Overview

Data Sheet

DS70005557C - 26

2.7.2

External Antenna Placement Recommendations

The user must ensure the following for the placement of the antenna and its cable:

• Do not route the antenna cable over circuits generating electrical noise on the host board or

alongside or underneath the module. The recommendation is to route the cable straight out of

the module.

• Do not place the antenna in direct contact or in close proximity of the plastic casing/objects.

• Do not enclose the antenna within a metal shield.

• The user must keep any components capable of radiating noise, signals or harmonics in the

2.4-2.5 GHz frequency range away from the antenna and, if feasible, provide shielding for such

components. Any noise radiated from the host board in this frequency band degrades the

sensitivity of the module.

• Place the antenna at a distance greater than 5 cm away from the module. The following

figure illustrates the antenna keepout area (do not place the antenna in this area). This

recommendation is based on an open-air measurement and does not take into account any

metal shielding of the customer end product. When a metal enclosure is used, the antenna can

be located closer to the WILCS02 Module.

The following figure illustrates how the antenna cable must be routed depending on the location

of the antenna with respect to the WILCS02 PCB. There are two possible options for the optimum

routing of the cable.

Figure 2-21. WILCS02 Module Antenna Placement Guidelines

5 cm from Board Edge

Preferred Antenna

Cable Routing Direction

Note: These are generic guidelines and the recommendation is that customers can check and

fine-tune the antenna positioning in the final host product based on RF performance.

WILCS02UE Datasheet(PDF) 26 Page - Microchip Technology