Radio Frequency Identification (RFID)

Radio Frequency Identification (RFID) - Applications of SAW RFID systems

Reading time: 3 minute

Automatic identification systems

Automatic identification systems have become very popular in recent years and are beginning to be used on a growing scale in our country in areas such as services, industry, tracking and identification of goods and finished productsEtc.

These identification systems have as main purpose the provision of information about people, animals, goods, products in transit, etc.

Bar code systems have produced a real revolution in the field. Today, however, they become inadequate in an increasing number of fields due to the extremely low capacity to store information (the number of digits is set by the chosen standard and is strictly limited).

What is RFID?

Radio Frequency Identification (RFID - Radio Frequency IDentification) or proximity is the latest and most advanced technological method of automatic data collection, gaining widespread acceptance as people understand and use this technology.

RFID is a bar code-like identification system. Bar code systems require a reader and sticky tags affixed to objects, while RFID requires a reader and special tags or cards attached / integrated into objects.

By comparison, the barcode uses the reflection of a light beam on the label containing the printed barcode, while RFID technique uses a low power electromagnetic field to read / write data, having a working frequency in the field of radio frequency.

This radio frequency field does not require a precise positioning of the object when reading, he penetrates any non-metallic material, no direct contact with the reading equipment is necessary and the condition of direct visibility between the reader and the tag must not be observed either.

What does the tag contain?

The tag contains an integrated circuit called a transponder, consisting of a microcontroller with ROM or RAM integrated on the chip and an antenna (consisting of wires or in integrated form on various supports).

The name Transponder comes from TRANSMITTER RESPONDER (transmitter - receiver), the main block of a radiocommunication equipment.

The structure of the paper

1. Introduction

1.1 Identification systems - generalities, principle scheme
1.2. Frequency of operation of RFID systems

2. Components and principle diagram of an RFID system

2.1 Block diagram of the RFID system
2.2 Tags used in RFID systems
2.3 Conclusions, comparison between RFID systems and barcodes

3. Fundamental principles of RFID operation

3.1 One-bit memory transponders
3.1.1 Query technique in the field of radio frequency (load modulation)
3.1.2 Microwave interrogation technique
3.1.3 Frequency division systems
3.1.4 Acoustic-magnetic EAS systems
3.2 Transponders with n-bit memory
3.2.1 Load modulation (modulation produced by the presence of the transponder)
3.2.2 RFID systems coupled by electromagnetic field
3.2.3 Electrically coupled RFID systems (with tight electrical coupling)
3.2.4 Surface acoustic wave transponders
3.2.5 Sequential procedure

Standardization in the field of RFID systems

a) ISO standards regarding the marking and radio identification of animals
b) ISO standards for contactless smart cards used as bank cards.
c) ISO standards regarding the marking and identification of containers
d) ISO standards for marking tightening tools and devices
e) ISO standards regarding anti-theft RFID systems
f) ISO standards related to article management

4. Presentation of RFID applications operating in the HF field

4.1 Use of RFID systems in public passenger transport
4.2 Use of RFID systems with electronic tickets
4.1 Use of RFID systems in public passenger transport
4.2 Use of RFID systems with electronic tickets
4.3 Use of RFID systems to control access
4.4 Use of RFID technology in air transport
4.5 Use of RFID technology in identifying and tracking people or animals
4.6 Use of RFID systems in sports
4.7 Using RFID systems in libraries
4.8 Use of RFID systems in industry

5. Presentation of RFID applications operating in the UHF field

5.1 Introduction - Types and manufacturers of RFID-UHF tags
5.2 Use of RFID-UHF systems on subway lines
5.3 Use of UHF RFID systems in large warehouses
5.4 Applications that use RFID-UHF technology for parking, charging and access control
5.5 Applications of SAW RFID systems


A comment

  1. Search on google images for greek traditional pattern. I don't know why it seems to me that the traditional Greek motifs are actually microstrip resonant antennas and circuits.

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