Enhanced Class 1 Bluetooth v2.1 Module
Hardware Integration Guide
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www.lairdtech.com/bluetooth
20
CONN-HIG-BT740
7.4
PCB Land Pattern and Antenna Keep-out for BT740-SA
Figure 7-4: PCB Land Pattern and Antenna Keep-out for BT740-SA
APPLICATION NOTES
1.
Ensure there is no copper in the antenna ‘keep out area’ on any layers of the host PCB. Also keep all
mounting hardware or any metal clear of the area to reduce effects of proximity detuning the
antenna and to help antenna radiate properly. Refer to section
for more information.
2. For BT740-SA (with on-board chip antenna) best antenna performance, the module BT740-SA
must
be
placed on the edge of the host PCB, preferably in the corner with the antenna facing the corner (see
). The module is placed in the corner of host PCB above the keep-out area. If the BT740-SA
is placed on the edge instead, the keep-out area must be modified (see
3. Ensure that there is no exposed copper under the module on the host PCB.
4. The user may modify the PCB land pattern dimensions based on their experience and capability.
Note: Units are in mm.
