MEIG SLM770A - Antenna; Antenna Requirements

SLM770A Module Hardware Design Manual
MeiG Smart Technology Co., Ltd 77/77
Module
ANT_GNSS
VDD
GNSS
Antenna
10R
47nH
NM NM
100pF
0.1uF
Figure 26 Reference circuit of GNSS antenna
5.3 Antenna
5.3.1 Antenna Requirements
The requirements for the main antenna, diversity receiving antenna and GNSS antenna are shown in the
following table:
Table 24 Antenna requirements
Type
Requirement
GNSS
Frequency range: 1561 MHz -1615MHz
Polarization: RHCP or linear
VSWR：< 2 (typical value)
Passive antenna gain: > 0 dBi
Active antenna noise coefficient: < 1.5 dB
Active antenna gain: >-2 dBi
Active antenna embedded LNA gain: 18.5dB (typical value)
Active antenna total gain: > 18.5 dB (typical value)