User Manual

ZE51/61-2.4 RF module User Guide
1VV0300868 Rev.4 – 31/03/2011
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 36 of 50
VI.3. RF layout considerations
Basic recommendations must be followed to achieve a good RF layout :
 It is recommended to fill all unused PCB area around the module with ground plane, except in case of
integrated antenna (no ground plane must be placed in front of the antenna and on the bottom side).
 The radio module ground pin must be connected to solid ground plane.
 If the ground plane is on the bottom side, a via (Metal hole) must be used in front of each ground pad.
Especially J28 and J30 (RF Gnd) pins should be grounded via several holes to be located right next to
the pins thus minimizing inductance and preventing mismatch and losses.
Example of GND layout Top View (with and without integrated antenna)