Product Info

Automotive Module Series
AG35 Hardware Design
AG35_Hardware_Design 86 / 129
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, Rx-diversity antenna and GNSS antenna.
Table 45: 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
GSM/EVDO/CDMA/UMTS/
TD-SCDMA/LTE
VSWR: ≤ 2
Efficiency: > 30%
Max input power: 50W
Input impedance: 50Ω
Cable insertion loss: < 1dB
(GSM850/EGSM900, WCDMA B5/B6/B8/B19,
LTE-FDD B5/B8/B12/B13/B17/B19/B20/B28,
EVDO/CDMA BC0)
Cable insertion loss: < 1.5dB
(DCS1800/PCS900, WCDMA B1/B2/B3/B4,
LTE-FDD B1/B2/B3/B4/B9/B11/B21, LTE-TDD B34/B39,
TD-SCDMA B34/B39)
Cable insertion loss: < 2dB
(LTE-FDD B7, LTE-TDD B38/B40/B41)
1)
It is recommended to use a passive GNSS antenna when LTE B13 or B14 is supported, as the use of
active antenna may generate harmonics which will affect the GNSS performance.
NOTES
NOTE