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HF and UHF RFID bands

 
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rbendel
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Joined: 19 May 2014
Posts: 4
Location: France
PostPosted: Tue Jun 03, 2014 1:58 pm    Post subject: HF and UHF RFID bands Reply with quote
Hello!
I wonder why in RFID, the UHF range (12m) is greater than the HF range (1m max), while the free space losses increase with frequency.
Is it because the UHF RFID antenna actually radiates and not the HF ones (Rrad<<Rlosses)?

thanks
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