User's Manual

GE864
GE864GE864
GE864-
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-QUAD Automotive V2 Hardware User Guide
QUAD Automotive V2 Hardware User GuideQUAD Automotive V2 Hardware User Guide
QUAD Automotive V2 Hardware User Guide
1vv0300840 Rev.3 2010-04-08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 32 of 71
This line of transmission shall fulfill the following requirements:
ANTENNA LINE ON PCB REQUIREMENTS
ANTENNA LINE ON PCB REQUIREMENTSANTENNA LINE ON PCB REQUIREMENTS
ANTENNA LINE ON PCB REQUIREMENTS
Impedance
ImpedanceImpedance
Impedance 50 ohm
Max Attenuation
Max AttenuationMax Attenuation
Max Attenuation 0,3 dB
No coupling with other signals allowed
No coupling with other signals allowedNo coupling with other signals allowed
No coupling with other signals allowed
Cold End (Ground Plane) of antenna shall be equipotential to
Cold End (Ground Plane) of antenna shall be equipotential to Cold End (Ground Plane) of antenna shall be equipotential to
Cold End (Ground Plane) of antenna shall be equipotential to
the
the the
the GE864
GE864GE864
GE864-
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-QUAD Automotive V2
QUAD Automotive V2QUAD Automotive V2
QUAD Automotive V2 ground pins
ground pins ground pins
ground pins
Furthermore if the device is developed for the US market and/or Canada market, it
shall comply to the FCC and/or IC approval requirements:
This device is to be used only for mobile and fixed application. The antenna(s) used for
this transmitter must be installed to provide a separation distance of at least 20 cm
from all persons and must not be co-located or operating in conjunction with any other
antenna or transmitter. End-Users must be provided with transmitter operation
conditions for satisfying RF exposure compliance. OEM integrators must ensure that
the end user has no manual instructions to remove or install the GE864-QUAD
Automotive V2 module. Antennas used for this OEM module must not exceed 3dBi gain
for mobile and fixed operating configurations.
7.2.
7.2.7.2.
7.2. GSM Antenna
GSM Antenna GSM Antenna
GSM Antenna -
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- PCB line Guidelines
PCB line Guidelines PCB line Guidelines
PCB line Guidelines
• Ensure that the antenna line impedance is 50 ohm;
• Keep the antenna line on the PCB as short as possible, since the antenna line
loss shall be less than 0,3 dB;
• Antenna line must have uniform characteristics, constant cross section, avoid
meanders and abrupt curves;
• Keep, if possible, one layer of the PCB used only for the Ground plane;
• Surround (on the sides, over and under) the antenna line on PCB with Ground,
avoid having other signal tracks facing directly the antenna line track;
• The ground around the antenna line on PCB has to be strictly connected to the
Ground Plane by placing vias once per 2mm at least;
• Place EM noisy devices as far as possible from GE864-QUAD Automotive V2
antenna line;
• Keep the antenna line far away from the GE864-QUAD Automotive V2 power
supply lines;
• If you have EM noisy devices around the PCB hosting the GE864-QUAD
Automotive V2, such as fast switching ICs, take care of the shielding of the
antenna line by burying it inside the layers of PCB and surround it with Ground
planes, or shield it with a metal frame cover.