User's Manual
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 3 Operating Characteristics
- 3.1 Operating Modes
- 3.2 Power Up/Power Down Scenarios
- 3.3 Power Saving
- 3.4 Power Supply
- 3.5 Operating Temperatures
- 3.6 Electrostatic Discharge
- 3.7 Blocking against RF on Interface Lines
- 3.8 Reliability Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
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ELS61-AUS Hardware Interface Description
2.2 RF Antenna Interface
52
ELS61-AUS_HID_v00.031 2016-06-03
Confidential / Preliminary
Page 41 of 102
2.2 RF Antenna Interface
The ELS61-AUS UMT/LTE antenna interface comprises a UMTS/LTE main antenna as well as
a UMTS/LTE Rx diversity antenna to improve signal reliability and quality
1
. The RF interface
has an impedance of 50
Ω. ELS61-AUS is capable of sustaining a total mismatch at the antenna
line without any damage, even when transmitting at maximum RF power.
The external antenna must be matched properly to achieve best performance regarding radi-
ated power, modulation accuracy and harmonic suppression. Antenna matching networks are
not included on the ELS61-AUS module and should be placed in the host application if the an-
tenna does not have an impedance of 50
Ω.
Regarding the return loss ELS61-AUS provides the following values in the active band:
2.2.1 Antenna Interface Specifications
1. By delivery default the LTE Rx diversity antenna is configured as available for the module since its usage
is mandatory for LTE. Please refer to [1] for details on how to configure antenna settings.
Table 7: Return loss in the active band
State of module Return loss of module Recommended return loss of application
Receive >
8dB > 12dB
Transmit not applicable >
12dB
Table 8: RF Antenna interface UMTS/LTE (at operating temperature range
1
)
Parameter Conditions Min. Typical Max. Unit
LTE connectivity
2
Band 3, 5, 8, 28
LTE 700 Band 28 -98.5 dBm
LTE 850 Band 5 -98 dBm
LTE 900 Band 8 -97 dBm
LTE 1800 Band 3 -97 dBm
LTE 700 Band 28 +22.5 dBm
LTE 850 Band 5 +22.5 dBm
LTE 900 Band 8 +22.5 dBm
LTE 1800 Band 3 +22.5 dBm
UMTS/HSPA connectivity
2
Band I, V, VIII
Receiver Input Sensitivity @
ARP
UMTS 2100 Band I -106.7 dBm
UMTS 850 Band V -104.7 dBm
UMTS 900 Band VIII -103.7 dBm