User's Manual

LE910 Hardware User Guide

1vv0301089 Rev.7 – 25-10-2015

6.7 GSM/WCDMA/LTE Antenna - Installation

Guidelines

 Install the antenna in a place covered by the GSM signal.

 Antenna must not be installed inside metal cases

 Antenna shall also be installed according Antenna manufacturer instructions

 Antenna integration should optimize the Radiation Efficiency. Efficiency values > 50% are

recommended on all frequency bands.

 Antenna integration should not dramatically perturb the radiation pattern. It is preferable to

get, after antenna installation, an omnidirectional radiation pattern, at least in one pattern cut

 Antenna Gain must not exceed values indicated in regulatory requirements, where applicable,

in order to meet related EIRP limitations. Typical antenna Gain in most M2M applications

does not exceed 2dBi.

 If the device antenna is located greater than 20cm from the human body and there are no co-

located transmitter then the Telit FCC/IC approvals can be re-used by the end product

 If the device antenna is located less than 20cm from the human body or there are no co-

located transmitter then the additional FCC/IC testing may be required for the end product

(Telit FCC/IC approvals cannot be reused)

6.8 Antenna Diversity Requirements

This product is including an input for a second RX antenna to improve the data throughput.

The function is called Antenna Diversity in WCDMA mode and downlink MIMO in LTE mode.

DIVERSITY ANTENNA REQUIREMENTS for LE910-EUG

Frequency range

Depending by frequency band(s) provided by the network operator, the

customer shall use the most suitable antenna for that/those band(s)

Bandwidth

(WCDMA)

WCDMA band I(2100) : 60 MHz

WCDMA band V(850) : 25 MHz

WCDMA band VIII(900) : 35 MHz

Bandwidth

(LTE)

LTE band III(1800) : 75 MHz

LTE Band VII(2600) : 70 MHz

LTE Band XX(800) : 30 MHz

Impedance

50 ohm

VSWR recommended

≤ 2:1 (recommended for best sensitivity performance)