Specifications
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.1.1 Pad Assignment
- 2.1.2 Signal Properties
- 2.1.3 USB Interface
- 2.1.4 Serial Interface ASC0
- 2.1.5 Serial Interface ASC1
- 2.1.6 Inter-Integrated Circuit Interface
- 2.1.7 UICC/SIM/USIM Interface
- 2.1.8 Enhanced ESD Protection for SIM Interfaces
- 2.1.9 Digital Audio Interface
- 2.1.10 Analog-to-Digital Converter (ADC)
- 2.1.11 RTC Backup
- 2.1.12 GPIO Interface
- 2.1.13 Control Signals
- 2.1.14 JTAG Interface
- 2.1.15 eMMC Interface
- 2.2 GSM/UMTS/LTE Antenna Interface
- 2.3 GNSS Antenna Interface
- 2.4 Sample Application
- 2.1 Application Interface
- 3 GNSS Interface
- 4 Operating Characteristics
- 5 Mechanical Dimensions and Mounting
- 6 Regulatory and Type Approval Information
- 7 Document Information
- 8 Appendix
Cinterion
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ALAS5V Hardware Interface Description
2.2 GSM/UMTS/LTE Antenna Interface
67
ALAS5V_HID_v00.030a 2019-03-20
Confidential / Preliminary
Page 43 of 124
2.2 GSM/UMTS/LTE Antenna Interface
The ALAS5V GSM/UMTS/LTE antenna interface comprises a GSM/UMTS/LTEmain antenna
as well as a UMTS/LTE Rx diversity/MIMO antenna to improve signal reliability and quality
1
.
The interface has an impedance of 50
. ALAS5V is capable of sustaining a total mismatch at
the antenna interface without any damage, even when transmitting at maximum RF power.
The external antennas must be matched properly to achieve best performance regarding radi-
ated power, modulation accuracy and harmonic suppression. Matching networks are not in-
cluded on the ALAS5V PCB and should be placed in the host application, if the antenna does
not have an impedance of 50
.
Regarding the return loss ALAS5V provides the following values in the active band:
1. By delivery default the UMTS/LTE Rx diversity/MIMO 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 12: Return loss in the active band
State of module Return loss of module Recommended return loss of application
Receive > 8dB > 12dB
Transmit Undefined mismatch >
12dB