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这种产品就属于无源天线，FCC已经明确无源NFC天线无需认证，CE也如此。
9 k$ `4 A! S7 q, m4 g( U+ Y0 z: EPassive tags used with Frequency Hopping Tag Reading systems operating in Section 15.247.+ h& _- D) j% d+ E
Frequently Asked Questions; U5 Q' l6 D" t3 \. L$ s$ n
Q: Is a passive tag subject to Certification?, q- r. t8 S9 l+ [: ?" y( l$ o/ Z
A: No, a passive tag does not contain batteries and by itself is not authorized.
3 f9 e- ~' U9 {Q: Are passive tags tested for Certification?
9 L7 J5 k* F/ J0 \A: No, only the tag reader needs to be tested. At this time, the current technology for passive* t8 z& G0 f9 |6 f& t# y
tags is such that the emission levels from the passive tags are much lower than the allowed levels1 O9 O1 F* V" U4 c3 K8 J6 [/ w5 U
for the tag reader. However, even with the low emission levels, the fundamental passive tag
* \$ J0 r& ~8 v/ g% D+ Cemission(s) may not operate within a restricted band just as the tag reader is prohibited from4 B6 A% L1 ^! l$ i; B/ ^1 E5 T
operating in a restricted band. The tag reader receiver should never include restricted band: H1 m: r. |. u2 T, M
frequencies. |
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