User Manual

Smart Machine Smart Decision
6.7 Antenna interface
6.7.1 Antenna connector
Antenna connector allows transmission of radio frequency (RF) signals between the modem and the external
supplied antenna. The T5320 modem is fitted with a 50Ω male SMA connector.
Figure 18: Antenna interface
6.7.2 Antenna type
The antenna is a very important component in the system. Since the antenna transmits and receives
electromagnetic signal, and its efficiency depends on the antenna’s type, placement and the environment of the
antenna operating.
.The recommended antenna specifications are showed in following table:
Table 14: antenna choosing consideration
Frequency range
GSM 850/900/1800/1900MHz
WCDMA 1900/850MHz(T5320A)
WCDMA 2100/900MHz(T5320E)
WCDMA 2100/850MHz(T5320J)
Impedance 50 ohm
Input power
>33dBm (2W) peak power in GSM
>24dBm (0.25W) peak power in WCDMA
VSWR absolute max. ≤10:1
VSWR recommended ≤2:1
Gain < 3dBi
6.7.3 Antenna placement
The antenna performance is very easily influenced by other electronic devices. So the antenna placement should
be considered carefully as follow.
1. Place away from other electronic devices or other antennas.
T5320_User Guide_V1.04 24 2013- 04-15