ME910G1 HW Design Guide
1VV0301593 Rev.3 Page 63 of 97 2020-03-24
• If a Ground plane is required in line geometry, that plane has to be continuous and sufficiently
extended, so the geometry can be as similar as possible to the related canonical model;
• Keep, if possible, at least one layer of the PCB used only for the Ground plane; If possible, use this
layer as reference Ground plane for the transmission line;
• It is wise to surround (on both sides) the PCB transmission line with Ground, avoid having other signal
tracks facing directly the antenna line track.
• Avoid crossing any un-shielded transmission line footprint with other signal tracks on different layers;
• The ground surrounding the antenna line on PCB has to be strictly connected to the main Ground
Plane by means of via holes (once per 2mm at least), placed close to the ground edges facing line
track;
• Place EM noisy devices as far as possible from ME910G1 antenna line;
• Keep the antenna line far away from the ME910G1 power supply lines;
• If EM noisy devices (such as fast switching ICs, LCD and so on) are present on the PCB hosting the
ME910, take care of the shielding of the antenna line by burying it in an inner layer of PCB and surround
it with Ground planes, or shield it with a metal frame cover.
• If EM noisy devices are not present around the line, the use of geometries like Microstrip or Grounded
Coplanar Waveguide has to be preferred, since they typically ensure less attenuation if compared to a
Stripline having same length;
The following image is showing the suggested layout for the Antenna pad
connection:
6.4.2. PCB Guidelines
in case of FCC Certification
In the case FCC certification is required for an application using ME910G1, according to
FCC KDB 996369 for modular approval requirements, the transmission line has to be
similar to that implemented on ME910G1 interface board and described in the following
chapter.
To Next Page
Loading...
Need help?
General
