Data Sheet

12.6 Locating the Module Close to Human Body
When using the module in an application where the radio is located close to human body, the human RF exposure must be evaluated.
FCC, ISED, and CE all have different standards for evaluating the RF exposure, and because of this, each standard will require a differ-
ent minimum separation distance between the module and human body. Certification of WFM200S allows for the minimum separation
distances detailed in Table 12.2 Minimum Separation Distances for SAR Evaluation Exemption on page 44 in Portable use cases
(less than 20 cm from human body). The module is approved for the Mobile use case (more than 20 cm) without any need for RF expo-
sure evaluation.
Table 12.2. Minimum Separation Distances for SAR Evaluation Exemption
Certification WFM200S with embedded antenna WFM200S with external reference dipole
antenna
FCC 23 mm 23 mm
ISED 40 mm 40 mm
CE The RF exposure must always be evaluated using the end-product when transmitting
with power levels higher than 20 mW = 13 dBm.
For FCC and ISED, using the module in end products where the separation distance is smaller than those listed above is allowed but
requires evaluation of the RF exposure in the final assembly and applying for a Class 2 Permissive Change or Change of ID to be
applied to the existing FCC/ISED approvals of the module. For CE, RF exposure must be evaluated using the end-product in all cases.
Note: Placing the module in touch or very close to the human body will have a negative impact on the efficiency of the antenna thus
reducing range.
WFM200S Data Sheet
Certifications
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