BGS2-E/BGS2-W Hardware Interface Overview
4 Antenna Interface
19
BGS2_HIO_v01.300
Page 19 of 29
2011-03-08
Confidential / Released
4
Antenna Interface
The RF interface has an impedance of 50
Ω
. BGS2-E/BGS2-W is capable of sustaining a total
mismatch at the antenna lines without any damage, even when transmitting at maximum RF
power.
The external antenna must be matched properly to achieve best performance regarding radi-
ated power, modulation accuracy and harmonic suppression. Antenna matching networks are
not included on the BGS2-E/BGS2-W module and should be placed in the host application if
the antenna does not have an impendance of 50
Ω
.
Regarding the return loss BGS2-E/BGS2-W provides the following values in the active band:
Table 8:
Return loss in the active band
State of module
Return loss of module
Recommended return loss of application
Receive
> 8dB
> 12dB
Transmit not
applicable
> 12dB
