Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Concept
- 3 Application Interfaces
- 3.1. General Description
- 3.2. Pin Assignment
- 3.3. Pin Description
- 3.4. Operating Modes
- 3.5. Power Saving
- 3.6. Power Supply
- 3.7. Power-on/off Scenarios
- 3.8. Reset the Module
- 3.9. (U)SIM Interfaces
- 3.10. USB Interface
- 3.11. UART Interfaces
- 3.12. PCM and I2C Interfaces
- 3.13. SPI Interface
- 3.14. Network Status Indication
- 3.15. STATUS
- 3.16. ADC Interface
- 3.17. Behaviors of RI
- 3.18. USB_BOOT Interface
- 4 GNSS Receiver
- 5 Antenna Interfaces
- 6 Electrical, Reliability and Radio Characteristics
- 7 Mechanical Dimensions
- 8 Storage, Manufacturing and Packaging
- 9 Appendix A References
- 10 Appendix B GPRS Coding Schemes
- 11 Appendix C GPRS Multi-slot Classes
- 12 Appendix D EDGE Modulation and Coding Schemes
LTE Standard Module Series
EG91 Hardware Design
EG91_Hardware_Design 55 / 93
5 Antenna Interfaces
EG91 antenna interfaces include a main antenna interface and an Rx-diversity antenna interface which is
used to resist the fall of signals caused by high speed movement and multipath effect, and a GNSS
antenna interface which is only supported on EG91-NA/-NS/-VX/-EX. The impedance of the antenna port
is 50Ω.
5.1. Main/Rx-diversity Antenna Interfaces
5.1.1. Pin Definition
The pin definition of main antenna and Rx-diversity antenna interfaces is shown below.
Table 24: Pin Definition of RF Antenna
Pin Name Pin No. I/O Description Comment
ANT_MAIN
60 IO Main antenna pad 50Ω impedance
ANT_DIV
(EG91-E)
49 AI
Receive diversity antenna pad
50Ω impedance
ANT_DIV
(EG91-NA/-NS/-VX/
-EX)
56 AI
Receive diversity antenna pad
50Ω impedance
5.1.2. Operating Frequency
Table 25: Module Operating Frequencies
3GPP Band Transmit Receive Unit
EGSM900 880~915 925~960 MHz
DCS1800 1710~1785 1805~1880 MHz
WCDMA B1 1920~1980 2110~2170 MHz