Frequency versus application: recommendations

AN2866

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Frequency versus application: recommendations

Before designing the tag antenna it is important to know which frequency has to be used in

your application.

●

Long-range (LR) products are usually tuned between 13.6 MHz and 13.7 MHz (for

distance optimization).

●

Standard short-range SR products are usually tuned between 13.6 MHz and 13.9 MHz

(for distance optimization).

●

Short-range products used as transport tickets are usually tuned between 14.5 MHz

and 15 MHz (for stack optimization).

These targeted frequencies should take into account the frequency shift due to the final

label material and environment. Let us take the example of a sticker tag with a paper label:

Paper and adhesive decrease the inlay antenna frequency by about 300 kHz. It is

therefore necessary to tune the initial inlay at about 13.9 MHz instead of the specified

13.6 MHz.