BT800 Hardware Integration Guide
Version 0.2
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www.lairdtech.com/bluetooth
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CONN-GUIDE-BT800_v0_2
13
I
MPLEMENTATION NOTE
PCB Layout on Host PCB
13.1
Checklist (for PCB):
MUST locate BT800/BT810 module close to the edge of PCB.
Use solid GND plane on inner layer (for best EMC and RF performance).
Place GND vias close to module GND pads as possible
Route traces to avoid noise being picked up on VCC supply.
Antenna Keep-out area:
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Ensure there is no copper in the antenna keep-out area on any layers of the host PCB.
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Keep all mounting hardware and metal clear of the area to allow proper antenna radiation.
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For best antenna performance, place the BT800 module on the edge of the host PCB,
preferably in the corner with the antenna facing the corner.
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A different host PCB thickness dielectric will have small effect on antenna.
Figure 18: Recommend Antenna keep-out area (in White) used on the BT800
13.1.1
Antenna keep-out and Proximity to Metal or Plastic
Checklist (for metal /plastic enclosure):
Minimum safe distance for metals without seriously compromising the antenna (tuning) is 40mm
top/bottom and 30mm left or right.
Metal close to the BT800 chip monopole antenna (bottom, top, left, right, any direction) will have
degradation on the antenna performance. How much; that is entirely system dependent which
means some testing by customer required (in their host application).
Anything metal closer than 20mm will start to significantly degrade performance (S11, gain,
radiation efficiency).
It is best that the customer tests the Range with mock-up (or actual prototype) of the product to
assess effects of enclosure height (and material whether metal or plastic).
