Placement - Panasonic PAN9520 Integration Manual

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PAN9520 Wi-Fi Module

3.3 Placement

Antenna "Keep out Area"
Do not place any ground plane under the marked restricted antenna area in
any layer! This would be affecting the performance of the chip antenna in a
critical manner.
Impact of Placement on the Antenna Radiation Pattern
The placement of the module, surrounding material, and customer
components has an impact on the radiation pattern of the antenna.
The recommendation for the ground plane is based on a FR4 4-Layer PCB.
The following requirements must be met:
✓ The supply voltage is free of AC ripple voltage (for example from a battery or a low noise
regulator output). For noisy supply voltages, provide a decoupling circuit (for example a
ferrite in series connection and a bypass capacitor to ground of at least 47 µF directly at the
module).
✓ Do not stress the module mechanically when installed.
✓ Keep this module away from heat. Heat is the major cause of decreasing the life time of
these modules.
✓ Avoid assembly and use of the target equipment in conditions where the module
temperature may exceed the maximum tolerance.
✓ Keep this module away from other high frequency circuits.
✓ Refer to the recommended pattern when designing a board.
The antenna requires a cutout area of 5 mm × 3.3 mm under the PAN9520 module. This "Keep
out Area" shall be located in every layer under the module antenna. Note for example the "Keep
out Area" in all four layers of the PAN9520 evaluation board.
It is recommended to verify the perfect position of the module in the target application before
fixing the design.
Module Integration Guide Rev. 1.1
3 PAN9520 Module
Page 11 of 44