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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 application was built using the following:

AC/DC Module

The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product's capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.