Telit Wireless Solutions LN940 WWAN M.2, Руководство пользователя

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Antenna Recommendations
The antenna elements are typically intergraded into the notebook and tablet
with connection to LN940 WWAN M.2 module by flexible RF coaxial cables.
Type of two RF antenna receptacles of LN940 WWAN M.2 module is MHF –
MAIN port is for primary transmitter and receiver and AUX port is for diversity
receiver and GNSS.
To assure the RF performance the following antenna guidance shall be
followed by platform designers.
Table 8.6-1 Main Antenna Design Guideline
Parameter Min. Typical Max. Units Description
Cable Loss / / 50 dB Maximum loss to antenna
Impedance / 50 / Ohm Antenna load impedance
VSWR / / 3:1 / Maximum VSWR of
antenna allowed
Table 8.6-2 Aux Antenna Design Guideline
Parameter Description
Gain Maximum gain and uniform coverage in high angle elevation and
zenith. Gain in the azimuth is not desired
Average 3D
Gain It has to be greater than 5dBi
VSWR Typical Value has to be less than 3:1
Isolation
(Diversity/AUX
to MAIN) It has to be greater than 10dB in all related bands
Polarization Any