User's Manual

AC65/AC75 Hardware Interface Description
Confidential / Preliminary
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AC65/AC75_hd_v00.372 Page 78 of 118 2006-08-03
4 Antenna Interface
The RF interface has an impedance of 50. AC65/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 AC65/AC75 PCB and should be placed
in the host application.
Regarding the return loss AC65/AC75 provides the following values in the active band:
Table 17: 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