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An RFID System

Application ID: 1264

RFIDs are used in a multitude of applications such as tracking or identifying consumer products and their packaging.

An RFID system consists of two main parts:

  • A tag or transponder with a printed circuit-board (PCB) antenna
  • A reader unit with a larger RF antenna
The reader antenna generates an electromagnetic field that energizes a chip (IC-circuit) inside the tag. The electromagnetic field is modulated by the tag’s circuit and the modulated signal is recovered by the reader antenna.

This example illustrates the modeling of such a reader-transponder pair where the mutual inductance between the reader and transponder antennas are calculated.

This model is included as an example in the following products:

AC/DC Module

The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.