Hardware Guide
Table Of Contents
- Fibocom_FM101-CG_Hardware_Guide_V1.0.pdf
- FM101-CG-20: Hardware Guide
- Contents
- Change History
- 1. Foreword
- 2. Product Overview
- 3. Pin Definition
- 4. Electrical Characteristics
- 5. Functional Interface
- 6. Radio Frequency
- 6.1. RF Interface
- 6.2. Operating Bands
- 6.3. Transmitting Power
- 6.4. Receiving Sensitivity
- 6.5. GNSS Receiving Performance
- 6.6. Antenna Design
- 6.7. PCB Routing Design
- 6.8. Main Antenna Design
- 6.9. Diversity and MIMO Antenna Design
- 6.10. GNSS Antenna Design
- 6.11. Other Interfaces
- 7. Thermal Design
- 8. Electrostatic Protection
- 9. Structural Specifications
- Appendix A: Acronyms and Abbreviations
- Module FCC & ISED警语 for Fibocom
6.6. Antenna Design
Antenna indicators
The antenna requirements for FM101-CG module are described in the following table.
Table 31. Module Antenna Requirements
FM101-CG module main antenna requirements
LTE
VSWR: ≤ 2
Input power: > 28dBm
Input impedance: 50Ω
Antenna gain: < 3.6dBi
Antenna isolation: > 25dB
Antenna correlation coefficient: < 0.5
GNSS
Frequency range: 1559 MHz–1609 MHz
Polarization direction: right-circular or linear polarization
VSWR: < 2:1
Passive antenna gain: > 0dBi
6.7. PCB Routing Design
6.7.1. Routing Rules
For modules that don’t have a RF connector, customers need to route a RF trace to
connect to the antenna feeding point or connector. It is recommended to use a
microstrip line. The shorter the better. The insertion loss should be controlled less than
0.2dB; and impedance should be controlled within 50Ω.
Add a π-type circuit (two parallel-component- grounded pins are connected directly to
the main GND) between the module and antenna connector (or feeding point) for
antenna debugging.
This signal line impedance is controlled within 50Ω during PCB cabling, and the RF
6. Radio Frequency
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