WLNG-SE-DP551 Quatech, WLNG-SE-DP551 Datasheet - Page 26

• Manufacturer Part Number: WLNG-SE-DP551
• Description: WiFi / 802.11 Modules & Development Tools WIRELESS DEV SERVER RS-422/485 SUPPORT
• Manufacturer: Quatech
• Series: Airborne™r

Specifications of WLNG-SE-DP551

• Wireless Frequency: 2.48 GHz
• Interface Type: UART
• Modulation: DBPSK, DQPSK, CCK, BPSK, QPSK, 16QAM, 64QAM
• Security: 64/128 bit WEP, WPA, AES, EAP
• Antenna: U.FL
• Operating Temperature Range: - 40 C to + 85 C
• Mfg Application Notes: Transition to DP550 Devices AppNote
• Frequency: 2.4GHz ~ 2.4835GHz
• Data Rate - Maximum: 54Mbps
• Modulation Or Protocol: 802.11 b/g
• Applications: WLAN
• Power - Output: -
• Sensitivity: -98dBm
• Voltage - Supply: 3.3VDC
• Current - Receiving: 310mA
• Current - Transmitting: 240mA
• Data Interface: Connector, 36 Pin Header
• Memory Size: -
• Antenna Connector: U.FL x 2
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / Rohs Status: Details
• For Use With/related Products: ARM 9, AR6002

Quatech, Inc.
8.0
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Antenna
The unit supports antenna connections through two Hirose U.FL connectors (CN2 and
CN3), located on the top surface of the device next to the RF shielding. The device
supports both transmit and receive diversity. Antenna selection and diversity options are
selectable through both the web and command line interfaces.
Any antenna used with the system must be designed for operation within the 2.4GHz
ISM band and specifically must support the 2.412GHz to 2.482GHz for 802.11b/g
operation. They are required to have a VSWR of 2:1 maximum referenced to a 50
system impedance.
8.1
8.2
Antenna Selection
The Airborne radio supports a number of antenna options, all of which require
connection to the U.FL connectors on the radio. Ultimately the antenna option
selected will be determined by a number of factors, these include consideration
of the application, mechanical construction and desired performance. Since the
number of possible combinations is endless we will review some of the more
common solutions in this section. If your application is not covered during this
discussion please contact Technical Support for more specific answers.
The available antenna connections include:



In addition to the above options, location and performance need to be
considered, the following sections discuss these items.
Host Board Mounted Antenna
Host board mounted requires that an antenna connection is physically mounted
to the host system board. It also requires that the host board include a U.FL
connector (two (2) if diversity is being used) to allow a U.FL to U.FL coaxial lead
to connect from the radio to the host board. It will then require 50 matched PCB
traces to be routed from the U.FL connector to the antenna mount.
There are several sources for the U.FL to U.FL coaxial cable these include
Hirose, Sunridge and IPEX. Please contact Quatech for further part numbers and
supply assistance.
This approach can simplify assembly but does require that the host system
configuration can accommodate an antenna location that is determined by the
host PCB. There are also limitations on the ability to seal the enclosure when
using this approach.
This approach also restricts the selection of available antenna. When using this
approach, antennas that screw or press fit to the PCB mount connector must be
Host board mounted antenna
Host chassis mounted antenna
Embedded antenna
4/14/2011
100-8090-100