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Do ferrite core increse the power transmission efficiency?

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Do ferrite core increse the power transmission efficiency?I want to use ferrite core in passive RFID tag and antenna,It seems that using ferrite core or ferrite rod can increse energy transmission efficency between RFID antenna and tag in a near fild?

Anyone can give some advice?

Can you give some IEEE paper about 13.56MHz passive RFID design with ferrite or without?

Thz!!!!
 

Near field implies ISO14443 or a similar proximity acrd standard?
It works without ferrite cores generally. But possibly, it can be useful in special applications.
 

Re: Do ferrite core increse the power transmission efficienc

Just for wireless power transmission in a distance about 5~10mm
 

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