A RFID (Radio frequency identification) tag is a tag device that exchanges usable form of data with RFID reader through radio frequency waves.


What RFID tag consists of?

RFID tags consist of two main parts, first being antenna, which receives the radio frequency (RF) waves; second being IC (Integrated circuit), which is used for processing and storing data.

 RFID tag contains chip and antenna

Why RFID tag is used?

RFID are used commonly used in merchandising to track people, objects and animals. When used to track objects, tags can be tagged to any items, usually these items are, apparel, baggage, containers, construction materials, laundry and materials.

RFID tag has many applications


Why is RFID tag used instead of bar-code?

The problem with bar-code is that, bar-codes can be scanned one at a time only. With RFID you can scan many objects at a single time. Also, bar-codes require being in the line of sight to be scanned, whereas RFID tags needs to be in the range of RFID readers.  So these are the benefits, why RF-IDs are preferred over bar-codes.

 RFID tag versus barcodes

How is RFID tag used?

You can hire RFID consultant or try to implement RFID by your own, but before that you need some basic knowledge about the technology.

RFID tags:

There are three different types of RFID:

  • Passive tags: These tags don’t have internal power source. They get their power from the RFID readers. They are the least costly.
  • Active tags: They contain battery for transmitting data. They are costly but can be reused.
  • RFID tags: They are the combination of active and passive, where they use battery to operate RFID chip, but communicate using power they get from reader.

RFID tag’s frequencies:

RFID tags are available in three frequencies. These are UHF (Ultra high frequency), HF (high frequency), and LF (low frequency). Higher ranges typically provide more bandwidth and data ranges.

RFID tag frequency

Next look for consultant who can implement RFID solution for your business needs. These are the some things you need to confirm about your consultant:

  • Understand the consultant main business and confirm that they are focused on RFID: Are they hardware vendors, bar-code integrator, or software providers.
  • It’s about improving business processes, not technology: Make it sure that they have integrated RFID successfully before.
  • Be clear what you want to achieve with RFID technology


What is a RFID tag made up of?

The materials used in making RFID tags depend upon the type of tag you are referring.  The microchips of UHF tags are made up of silicon. The antenna attached to the microchip is made up of copper or aluminum. Finally, both the antenna and the chip are mounted on substrate which can be paper or plastic.

Passive LF and Passive HF tags are similar, although the antenna is always etched copper for these types of tags.


How is RFID tag powered?

As said before passive RFID tags don’t contain any power source, and is powered by the RFID readers.  When the tags are in the field of RFID readers, the coiled antenna within the tag’s antenna forms a magnetic field. This then transmits data back to the RFID readers.

 How RFID tag works

How to program RFID tag?

RFID can be programmed using programming languages like .NET, Java, Python, etc. RFID system generally involves RFID reader and tags. Each tag contains a unique Id and other useful information. The unique id is used to differentiate one object tagged with RFID tag from another object. All the RFID tags’ data is entered into the database.

 How to program RFID tag


Can RFID tag be read through the metal?

No, RFID tags cannot be read through the metal as the radio frequency waves cannot pass through the metal. In the passive RFID system, the waves sent by the reader to power up the tag would bounce off the metal and never reach the tag, and hence the tag would be never able to respond.


How many RFID tags can be read at once?

Actually RFID readers can read only one RFID tag at a time, but the speed they do so is very fast. So it may seem they are reading the tags simultaneously.


How much the RFID tags cost?

The pricing depends upon the type and volume of tags. Generally active tags cost around $25(Rs 1750), while passive tags can cost around $.7(Rs 50) – $1.5(Rs 105) per tag.


Applications of RFID tags:

RFID tags for equipment

 RFID tag for equipment


RFID tags for garments

RFID tag for cloths

RFID tags for jewelery

RFID tag for jewelery

RFID tags for laptops

RFID tag for laptop

RFID tags for trucks

RFID tag for trucks

RFID tags for trees

RFID for trees

RFID tags for small tools


RFID tags for cars

RFID for cars

RFID tags for livestock

RFID tag for livestock

RFID tags for sheep

RFID tag for sheep

RFID tags for books

RFID tag for books