RFID COASTERS

When RFID labels are used to tag metal objects, a well-known issue with reading them arises. The problem is especially noticeable with LF and HF RFID tags. In this case, the issue of reading a tag on a metal surface can be solved in two ways:

By using on-metal RFID tags.
This solution is usually applied when readable information is not required on the card, since such tags are not intended for printing.
By using special coasters (spacers).
Coasters are typically used with RFID labels on rolls that pass through an RFID printer-encoder during the forming (initial encoding) process, and therefore must be thin and flexible. In this case, after the labels are created, the label is attached to an RFID spacer and then, together with the spacer, applied to the metal surface.

Specification

The basic idea behind using spacers is to separate the RFID label from the metal surface, thereby increasing the reading range between the label and the metal and effectively creating a layer that prevents the absorption of RF waves by the metal.

There are three types of RFID spacers:

Foam
PVC
Ferrite

The effectiveness ratio of spacers is given as FERRITE : PVC : FOAM = 6 : 2 : 1, which practically means that a 1 mm thick ferrite spacer provides the same improvement as a 3 mm thick PVC spacer and a 6 mm thick foam spacer.
Depending on the type of metal on which the RFID tag is mounted, as well as the frequency used, the appropriate spacer should be selected. We therefore recommend contacting us for consultation and advice on which type of spacer to choose.

Ferrite Coasters

Property	Unit	FAM1	FAM3	FAM7	FAM5A	FAM5B	FAM6
Operating Temperature	^oC	-40 ~ +85		-30 ~ +120	-40 ~ +85		-40 ~ +155
Applicable Frequency	GHz	–		1MHz ~ 3GHz	1MHz ~ 9GHz
Permeability (µ’@1MHz)	–	25	50	140	150	250	170
Material	–	Magnetic Powder + Rubber		Sintered Ferrite Sheet	Magnetic Powder + Rubber
Thickness Range	mm	0.12 ~ 2.50	0.25 / 0.50 / 0.75	0.08 / 0.12 / 0.22	0.05 ~ 0.50
Max. Dimension	mm	600 x 400		130 x 130	210×297 (A4 size)
Surface Resistance	ohm	10⁶		10⁹	10⁵
Density	g/cm³	3.6	4.8	3.8	4.4		3.8
RoHS 2.0 Compliance	–	2011/65/EU
Halogen-Free	–	No		Yes

Infotech Studio d.o.o.

+381 69 2052447 +381 18 205244

office@infotech.rs

Dr Petra Vučinića 16, 18000 Niš

Working hours:

Monday-Friday: 08-16h
Saturday, Sunday: closed

Company info:

PIB: 106212272
MB: 20555971