RoyalTek REB-3300 - Manual (Page 8)

REB-3300 Operational Manual
trace. It can reduce noise and increase the stability.
(4) Antenna:
Connecting to the antenna has to be routed on the PCB. The transmission line must
to controlled impedance to connect RF_IN to the antenna or antenna connector of
your choice.
(5) Active antenna bias voltage:
The Vcc_RF pin(pin 20) is provide voltage 3.0V. If you use active antenna, you can
connect this pin to V_ANT_IN pin (pin 19) to provide bias voltage of active antenna.
The bias voltage will through RF_IN pin to provide active antenna bias voltage from
Vcc_RF pin.
If your bias voltage of active antenna isn’t 3.0V, you can input bias voltage to
V_ANT_IN pin(pin 19).And input bias voltage of you need. It can open if you use
passive antenna. The input bias voltage will through RF_IN pin to provide active
antenna bias voltage from V_ANT_IN pin.
The maximum power consumption of active antenna is about 100mW
(6) Power:
Connect Vcc pin to DC 3.3V.The power supply must add bypassing capacitor(10uF
and 1uF).It can reduce the Noise from power supply and increase power stability.
Recommended layout PAD
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