RN-171-DS Datasheet, PDF (9/16 Pages) Microchip Technology – RN-171 802.11 b/g Wireless LAN Module

RN-171
 
The trace from the RF pad to the antenna feed should be 12 mils thick on a 4-layer PCB to achieve 50 ohms of impedance
matching as shown in Figure 7.
Figure 7. Trace from RF Pad to Antenna Feed
12-mil Thick Trace from
RF Pad to Antenna Feed
 
 
Chip Antenna
If your design uses a chip antenna, Roving Networks recommends the 2450AT42A100 manufactured by Johanson. Refer
to the antenna’s data sheet for additional information such as dimensions, mounting considerations, and radiation
patterns. Figure 8 shows the antenna dimensions.
www.rovingnetworks.com
Version 3.21 10/2/2012
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