Antenna Interface; Table 17: Return Loss In The Active Band - Siemens AC75 Hardware Interface Description

AC75 Hardware Interface Description
Strictly confidential / Preliminary
4

Antenna Interface

The RF interface has an impedance of 50Ω. AC75 is capable of sustaining a total mismatch
at the antenna connector without any damage, even when transmitting at maximum RF
power.
The external antenna must be matched properly to achieve best performance regarding
radiated power, DC-power consumption, modulation accuracy and harmonic suppression.
Antenna matching networks are not included on the AC75 PCB and should be placed in the
host application.
Regarding the return loss AC75 provides the following values in the active band:

Table 17: Return loss in the active band

State of module Return loss of module
Receive > 8dB
Transmit not applicable
AC75_HD_V00.202
Recommended return loss of application
> 12dB
> 12dB
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27.04.2006