Data Sheet

BDE-BLEM301
Bluetooth 5.1 LE Module
Datasheet
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BDE Technology Inc.
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degradation depends on the host system characteristics.
Following table summarizes antenna efficiency for different placements on a host PCB as indicated in
Figure 9.
Table 10: Antenna gain and efficiency vs module positions
Frequency
Position #1
Position #2
Position #3
Gain (dBi)
Efficiency
Gain (dBi)
Efficiency
Gain (dBi)
Efficiency
2400 MHz
2.68
51.02%
-0.35
34.12%
1.75
46.40%
2410 MHz
2.67
51.60%
-0.18
35.87%
1.89
47.22%
2420 MHz
2.73
51.24%
-0.12
36.90%
1.96
46.88%
2430 MHz
2.90
51.52%
0.03
38.32%
2.00
47.11%
2440 MHz
3.15
54.14%
0.57
42.08%
2.23
50.00%
2450 MHz
3.26
56.49%
0.98
45.56%
2.34
51.84%
2460 MHz
3.20
57.63%
1.33
48.78%
2.45
53.03%
2470 MHz
3.15
56.26%
1.34
49.51%
2.34
51.89%
2480 MHz
2.88
53.78%
1.32
49.02%
2.21
50.01%
2490 MHz
2.58
51.67%
1.35
48.16%
2.16
48.91%
2500 MHz
2.61
50.40%
1.24
46.50%
2.05
48.07%
Position #1 Position #2 Position #3
Figure 9: Mounting Positions for Optimum Antenna Performance