User Manual
Table Of Contents
EHS6 Hardware Interface Overview
2.2 RF Antenna Interface
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EHS6_HIO_v01.441 Page 18 of 38 2013-07-11
Confidential / Preliminary
2.2 RF Antenna Interface
The RF interface has an impedance of 50. EHS6 is capable of sustaining a total mismatch at
the antenna line 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 EHS6 module and should be placed in the host application if the antenna
does not have an impedance of 50
.
Regarding the return loss EHS6 provides the following values in the active band:
Table 3: 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