ML865G1 HW Design Guide
1VV0301632 Rev. 4 Page 58 of 86 2020-09-23
100 MHz in LTE Band 28
490 MHz in LTE Band 66
81 MHz in LTE Band 71
48 MHz in LTE Band 85
Impedance 50 ohm
Input power ML865G1-WW: > 33dBm Average power
VSWR absolute max ≤ 10:1 (limit to avoid permanent damage)
VSWR recommended ≤ 2:1 (limit to fulfill all regulatory requirements)
6.4.1. PCB Design guidelines
When using the ML865G1, since there's no antenna connector on the module, the
antenna must be connected to the ML865G1 antenna pad (K1) by means of a
transmission line implemented on the PCB.
This transmission line shall fulfil the following requirements:
Item Value
Characteristic
Impedance
50 ohm (+-10%)
Max Attenuation 0,3 dB
Coupling Coupling with other signals shall be avoided
Ground Plane
Cold End (Ground Plane) of antenna shall be equipotential to
the ML865G1 ground pins
The transmission line should be designed according to the following guidelines:
• Make sure that the transmission line’s characteristic impedance is 50ohm ;
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