WT11i-A-AI Bluegiga Technologies, WT11i-A-AI Datasheet - Page 17

• Manufacturer Part Number: WT11i-A-AI
• Description: Bluetooth / 802.15.1 Modules WT11i Class1 2.1+EDR Chip Ant, iWRAP 2.2
• Manufacturer: Bluegiga Technologies

Specifications of WT11i-A-AI

• Rohs: yes
• Class: 1
• Frequency Band: 2.4 GHz
• Sensitivity: - 83 dBm
• Operating Supply Voltage: 3.3 V
• Output Power: 17 dBm
• Interface Type: GPIO, UART, USB
• Antenna Connector Type: Chip
• Maximum Operating Temperature: + 85 C
• Dimensions: 35.8 mm x 14.5 mm x 2.3 mm
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

Use good layout practices to avoid excessive noise coupling to supply voltage traces or sensitive analog
signal traces, such as analog audio signals. If using overlapping ground planes use stitching vias separated
by max 3 mm to avoid emission from the edges of the PCB. Connect all the GND pins directly to a solid GND
plane and make sure that there is a low impedance path for the return current following the signal and supply
traces all the way from start to the end.
-10
-15
-20
-25
-30
-35
-40
-5
0
2300
Effect of PCB thickness to the antenna impedance matching
Figure 13: Effect of FR4 under the antenna to the resonant frequency
2350
Figure 12: Recommended metal keep put area for WT11i
GND area with
stitching vias
2400
Bluegiga Technologies Oy
Freq (MHz)
2450
2500
2550
2600
Edge of the PCB
Do not place
copper or any
metal within
the area
marked with
cross lines
1 mm
2 mm
3 mm
BT Band
Page 17 of 41