RN131C/RM Roving Networks, RN131C/RM Datasheet - Page 8

• Manufacturer Part Number: RN131C/RM
• Description: WiFi / 802.11 Modules WiFly GSX 802.11b/g Mod Commercial Temp
• Manufacturer: Roving Networks

Specifications of RN131C/RM

• Product Category: WiFi / 802.11 Modules
• Rohs: yes
• Protocol Supported: 802.11 b/g
• Frequency Band: 2.4 GHz
• Data Rate: 11 Mbps, 54 Mbps
• Interface Type: SPI, UART
• Transmit Power (max): 18 dBm
• Antenna Connector Type: Chip, U.FL
• Operating Supply Voltage: 3.3 V
• Supply Current Transmitting: 210 mA
• Supply Current Receiving: 40 mA
• Maximum Operating Temperature: + 70 C
• Dimensions: 38 mm x 20 mm x 4 mm
• Minimum Operating Temperature: 0 C
• Modulation Technique: DSSS, OFDM
• Security: WEP, WPA, WPA2

DESIGN CONCERNS
The following sections provide information on designing with the RN-131 module, including radio interference, grounding,
solder reflow, connection status, etc.
Minimizing Radio Interference
When integrating the WiFly module with the on-board chip antenna, ensure that the area around the chip antenna end of
the module protrudes at least 6 mm from the motherboard and any metal enclosure. If this placement is not possible, use
the on-board U.FL connector to route to an external antenna.
The 8.5-mm area under the module’s antenna end should be kept clear of metallic components, connectors, vias, traces,
and other materials that can interfere with the radio signal. See Figure 6.
Figure 6. Antenna Clearance
Keep Metallic Components,
Connectors, Vias, & Traces
Away from Antenna Area
www.rovingnetworks.com
Top View
20 mm
RN-131
Version 3.2r 4/9/2012
6 mm
8.5 mm
RN -13 1-DS
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