WH-BLE103 Hardware Manual
Shanghai wenheng electronic technology limited
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2.6.2. WH-BLE103b
User needs reserved π type match circuit on PCB board. RF line need guarantee 50ohm impedance matching and
try to be short to reduce attenuation of signal. User can refer to below reserved match circuit:
Figure 9 WH-BLE103b reserved match circuit
Note
:
1.Module is recommended to be placed on edge of PCB board to shorten the distance to antenna and this can
help to reduce attenuation of signal. RF line need guarantee 50ohm impedance matching to avoid lowering signal
quality.
2.Keep RF line away from power supply, clock signal and other signal source which maybe cause interference.
3.When user places antenna, it is necessary to ensure antenna in exposed status and it would better be vertically
upward. User can’t place antenna in metal shell which can greatly reduce transmission distance.
