Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1Introduction
- 2Product Concept
- 3Application Interfaces
- 3.1.General Description
- 3.2.Pin Assignment
- 3.3.Pin Description
- 3.4.Power Supply
- 3.5.Turn on and off Scenarios
- 3.6.VRTC Interface
- 3.7.Power Output
- 3.8.Battery Charge and Management
- 3.9.USB Interface
- 3.10.UART Interfaces
- 3.11.(U)SIM Interfaces
- 3.12.SD Card Interface
- 3.13.GPIO Interfaces
- 3.14.I2C Interfaces
- 3.15.ADC Interfaces
- 3.16.Motor Drive Interface
- 3.17.LCM Interface
- 3.18.Touch Panel Interface
- 3.19.Camera Interfaces
- 3.20.Sensor Interfaces
- 3.21.Audio Interfaces
- 3.22.Emergency Download Interface
- 4Wi-Fi and BT
- 5GNSS
- 6Antenna Interface
- 7Electrical, Reliability and Radio Characteristics
- 8Mechanical Dimensions
- 9Storage, Manufacturing and Packaging
- 10Appendix A References
- 11Appendix B GPRS Coding Schemes
- 12Appendix C GPRS Multi-slot Classes
- 13Appendix D EDGE Modulation and Coding Schemes
Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design Confidential / Released
6-79
/ 122
Figure 38: Reference Circuit Design for GNSS Active Antenna
6.4. Antenna Installation
6.4.1. Antenna Requirement
The following table shows the requirement on main antenna, RX-diversity antenna, Wi-Fi/BT antenna and
GNSS antenna.
Table 38: Antenna Requirements
Type
Requirements
GSM/WCDMA/TD-SCDMA/
LTE
VSWR: ≤ 2
Gain (dBi): 1
Max Input Power (W): 50
Input Impedance (Ω): 50
Polarization Type: Vertical
Cable Insertion Loss: < 1dB
(GSM850, EGSM900, WCDMA B5/B6/B8/B19, CDMA BC0, LTE-FDD
B5/B8/B12/B13/B18/B19/B20/B26/B28)
Cable Insertion Loss: < 1.5dB
(DCS1800, PCS1900, WCDMA B1/B2/B4, TD-SCDMA B34/B39,
LTE-FDD B1/B2/B3/B4/B25, LTE-TDD B39)
Cable Insertion Loss: < 2dB
(LTE-FDD B7, LTE-TDD B38/B40/B41)
Wi-Fi/BT
VSWR: ≤ 2
Gain (dBi): 1
Max Input Power (W): 50
Input Impedance (Ω): 50