Open-Q™ 624A Development Kit
Open-Q™ 624A Development Kit User Kit
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3.7.2 SOM RF Interfaces for Wi-Fi and Bluetooth Antennas
The Wi-Fi/BT module on the SOM includes the following RF antenna interfaces:
•
ANT0: Wi-Fi antenna 1
•
ANT1: Wi-Fi antenna 2
•
ANT2: Bluetooth antenna
Wi-Fi antennas
: The ANT0 port is for one of the two Wi-Fi antennas and ANT1 is for the other Wi-Fi antenna.
Since the Wi-Fi module uses 2x2 MIMO technology and operates in both the 2.4GHz and 5GHz bands, two
dual-band antennas are required to be connected to achieve the full performance of the Wi-Fi interface. By
default, both antenna ports are connected to the carrier board PCB antennas labelled “WLAN ANT1” and
“WLAN ANT2” via coaxial cables. Other suitable antennas may be used by connecting them directly to the Wi-
Fi antenna ports on the module with MHF4 coaxial connectors.
Bluetooth antenna
: The ANT2 port is for a dedicated Bluetooth antenna. By default, this port is connected to
the carrier board PCB antenna labelled “BT” via a coaxial cable.
The Wi-Fi/BT module is designed with a dedicated Bluetooth antenna port so that the Bluetooth and Wi-Fi
antennas can be physically separated in the end product to provide better isolation between them. This is
done to improve concurrent Wi-Fi and Bluetooth operation. The greater the separation between antennas, the
better the concurrent Wi-Fi – Bluetooth performance will be.
For details on how the Wi-Fi module connects to the on-board PCB antennas on the carrier board, refer to
section 0.
3.7.3 SOM RF Interface for GNSS Antenna
The SOM includes one U.FL type coaxial connector for the GNSS receiver antenna, with a +2.7v bias on it to
provide power for an active GNSS antenna. By default, this port is connected to the carrier board PCB
antenna labelled “GPS” via a coaxial cable. If desired, a suitable GNSS antenna with a U.FL connector could
be connected directly to the SOM antenna port by carefully removing the carrier board coaxial cable.
For more information about connecting a GPS antenna to the development kit see section 3.8.18 below.