Specifications

AC65/AC75 Hardware Interface Description
4 Antenna Interface
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AC65_AC75_HD_v01.002 Page 71 of 117 2006-10-30
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4 Antenna Interface
The RF interface has an impedance of 50Ω. 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