LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 57 / 76
Figure 28: Reference Circuit of GNSS Antenna Interface
1. An external LDO can be selected to supply power according to the active antenna requirement.
2. If the module is designed with a passive antenna, then the VDD circuit is not needed.
5.3. Antenna Installation
5.3.1. Antenna Requirements
The following table shows the requirements on main antenna and GNSS antenna.
Table 34: Antenna Requirements
Antenna Type Requirements
GNSS
1)
Frequency range: 1559MHz ~1609MHz
Polarization: RHCP or linear
VSWR: < 2 (Typ.)
Passive antenna gain: > 0dBi
Active antenna noise figure: < 1.5dB
Active antenna gain: > 0dBi
Active antenna embedded LNA gain: < 17dB
LTE
VSWR: ≤ 2
Efficiency: > 30%
Max Input Power (W): 50
Input Impedance (Ω): 50
NOTES
To Next Page
Loading...
