PAN1322
Application Note
44
Revision 1.2, 2013-12-18
Design Guide
7
Layout
7.1
Two layer PCB reference design
Since eUniStone PBA31309 have an onboard antenna there are only minor considerations for a two
layer PCB layout.
The PCB layers under the antenna shall not contain any metal.
Place module with the antenna facing the edge of the PCB.
Do not place the other sides of the module too close to the edge of the PCB.
M
in
. 4
0
m
m
1
5
.6
3
.0
0
8.7
Min. 15mm
Min. 15mm
Restricted Area
No copper in any layer
5.00
Dimensions are in mm.
Use a Ground plane in the area
surrounding the PBA31309 module
wherever possible.
If possible place PBA31309 in the
center of the main PCB.
P
la
ce
P
B
A
3
1
3
0
9
a
t
th
e
ed
ge
o
f
th
e
m
ai
n
P
C
B
.
Top View
Figure 14. Restricted area under antenna and recommended placement on PCB.