Using a GPIO as OUTPUT 50
Indication of Network Service Availability 50
External SIM Holder 51
ADC Converter 51
Antenna Tuner 52
GPIO 52
MIPI 52
6. RF SECTION 53
Antenna Requirements 53
PCB Design Guidelines 54
PCB Guidelines in Case of FCC Certification 55
Transmission Line Design 55
Transmission Line Measurements 56
Antenna Installation Guidelines 58
7. AUDIO SECTION 59
Electrical Characteristics 59
8. GNSS SECTION 60
GNSS Signals Pin-out 60
RF Front End Design 60
Guidelines of PCB Line for GNSS Antenna 60
Hardware-based Solution for GNSS and LTE Coexistence 61
GNSS Antenna Requirements 62
GNSS Antenna Specification 62
GNSS Antenna – Installation Guidelines 62
Powering the External LNA (Active Antenna) 62
GNSS Characteristics 63
9. MECHANICAL DESIGN 64
Drawing 64
10. APPLICATION PCB DESIGN 65
Recommended footprint for the application 65
PCB Pad Design 67