RFID Tag Details

Passive RFID Tags have generally two main components. One is Antenna coil and another is microchip. There is no Battery or any active power.
WORKING DETAILS:
With no power source the usually tag stays ideal. The whole process starts with RFID transmitter. The transmitter generates the electromagnetic radiation through its antenna. When tag gets in range of transmitter, the tag antenna coil gets energized through electromagnetic radiation. This energy acts as power source for the chip in tag. The transmitter receives this response which is unique to the tag and provides the corresponding output.
TYPES OF TAG AVAILABLE:
1. Passive Tag are very cheap to buy and are available massively. So replacing them will be easy.
2. When Tag needs to be slim. There are available as thin as paper and as small as finger nail.
3. Passive tags do not need any power.
Types of Passive tags.
a. Low frequency: 125 KHz works up to 10cm.Usually used for ID cards.
b. Medium frequency: 13.5MHz works up to 1meters. Usually used at airport security.
c. High frequency: 900MHz works up to 30 meters. Usually used for File tracking and package tracking.
APPLICATIONS OF PASSIVE TAGS:
1. Security systems.
2. Medical tags.
3. Package Identification.
4. Theft protection systems.
5. Data authorization.
6. Unique Identity.
7. Body implants.
ACTIVE RFID TAGS:
Active Tags are with power sources fixed internally. So for them there will be usually three main components. One is Antenna , second is microchip and third is power source. For active tags power sources are usually non rechargeable batteries. These systems usually last for 2-5 years. Once the battery is dead it needs to be replaced for the tag to work again.
USE ACTIVE TAGS:
1. For higher range – Active tags can respond to distances many times higher than passive tags.
2. For accurate position – Active tags provide more accurate position then passive ones.
APPLICATIONS OF ACTIVE TAGS:
1. Security systems.
2. Toll booths.
3. Industrial systems.
4. Data authorization.
5. System locating.

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