Hardware Guide

Table Of Contents

can resist against fading and improve throughput.

•

The customer is recommended to design the corresponding antenna according to

the antenna requirements of each module antenna port.

•

The design method of diversity antenna and MIMO antenna is consistent with that

of main antenna. It is recommended to control the difference of the efficiency of

diversity antenna and MIMO antenna from that of main antenna by no more than

3dB.

•

The isolation of each antenna shall be greater than 25dB, and the antenna

correlation coefficient shall be less than 0.5. High isolation does not mean good

correlation coefficient. Customers need to evaluate two indexes separately. The

isolation and correlation coefficient of antenna generally depend on:

◦

Antenna isolation

◦

Antenna type

◦

Antenna directivity

6.10. GNSS Antenna Design

The GNSS antenna can use a passive antenna or an active antenna. If the active antenna

is used, the module supports the internal power supply to the active antenna, with the

power supply voltage of 2.928V, and the power supply needs to be started with the AT

command.

6.11. Other Interfaces

For the application of other interfaces, please refer to the recommended design. If the

application scenario and the recommended design are not consistent, please contact

FIBOCOM technicians for confirmation.

6. Radio Frequency