RFID Tags: What Are They and How Do They Work?
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RFID Tags: What Are They and How Do They Work?

Views: 2     Author: Site Editor     Publish Time: 2023-03-06      Origin: Site

RFID technologyhas evolved rapidly in recent years, with new applications and tag types emerging every day.There are, however, many people who are unfamiliar with RFID tags and how they work.RFID tags are explained in this article, along with some of their most common uses.

What are RFID Tags?

A RFID reader is a device that can read signals emitted by RFID tags.RFID tags are used in a variety of industries, including retail, manufacturing, and logistics.Among their components are:

  • RFID chip

  • Antennae

  • Substrate

An RFID chip stores information about the item it is attached to.In order for an RFID reader to detect the signal, the antennae must emit a signal.Other components are supported and strengthened by the substrate.

A unique identifier is usually included in tags so that they can be tracked.Using the identifier from an RFID tag, the reader can look up information about the tag in the database when it is read by an RFID reader.

A sophisticated software program is used in conjunction with RFID tags.RFID readers use this mechanism to automatically update databases with information about tags they read.It can be used to track inventory in real time, which can be very beneficial for businesses.

What are the Components of RFID Tags?

The components of an RFID tag determine its functionality, which varies based on the application.The most basic tags, however, consist of three elements:

An RFID Chip/Microchip

A computer chip stores and processes data.Power requirements determine whether it is active or passive.Passive tags require an external source of energy to transmit information, whereas active tags come with a built-in battery and transmit independently.


The antenna of an RFID tag receives signals from the reader and responds with the stored data.Different RFID systems use different types of antennas, such as dipole antennas, printed coil antennas, and patch antennas.


RFID tags usually have a hard plastic or other substrate covering the chip and antenna.A thermosensitive material or RF-blocking film may additionally protect some tags, depending on their application.

Types of RFID Tags

There are different types of RFID chips in RFID tags.RFID tags can be classified into three types:

  • Passive RFID tags

  • Active RFID tags

  • Battery-assisted passive (BAP) RFID tags

RFID tags that are passive are most commonly used.Electromagnetic fields generated by RFID readers power them.It is much cheaper to buy passive tags than active ones, but their range is much shorter.

RFID tags with active antennae and chips are powered by batteries.Compared to passive tags, active tags have much longer ranges.Tags with active technology are more expensive than passive tags, but are worth the extra cost in applications that require long range.

The RFID chip in battery-assisted passive (BAP) tags is powered by a battery when they are outside of the RFID reader's range.Compared with a passive tag, this tag can be read from a longer distance.While BAP tags are more expensive than passive tags, they combine the long range of active tags with the low cost of passive tags.

In addition to this classification, RFID tags can also be classified according to their frequency of operation.The main frequencies used by RFID tags are:

  • Low-frequency (LF) RFID tags

  • High-frequency (HF) RFID tags

  • Ultra-high-frequency (UHF) RFID tags

In LF RFID tags, thefrequency ranges from 30 kHz to 300 kHz.In addition to metallic and wet environments, they work optimally in all kinds of environments.These tags are, however, only able to read within a 10-cm range.Access control, livestock tracking, and security applications are ideal for them.

Multiple tags can beread simultaneously using HF/NFC RFID inlays/tags using frequencies between 3 MHz and 30 MHz.The read range of HF RFID tags is also longer than that of LF RFID tags, reaching up to 1 meter.In addition to access control and contactless payments, HF tags are often used to track events.

Inlays/tags with UHF RFID use frequencies between 300 MHz and 3 GHz.RFID tags with active tags have the longest read range, up to 10 meters.A metal or water obstacle, however, can reduce their efficiency.Asset tracking and warehouse management applications use UHF RFID tags.

How are RFID Tags Used?

The process of using RFID tags in your business is simple.There is no need to change your work methods during installation, as it is an easy process.Set up of an RFID tagging system consists of the following steps:

  • Choose Ideal RFID Tag. To do this, you must select the appropriate tag.Your choice will be influenced by its application.For tracking warehouse assets, you will need RFID tags with long read ranges.Tracking livestock requires a tag that can withstand harsh conditions, preferably one that is low frequency.

  • Write the Tags. RFID tags are encoded with information through this process.RFID programs can be programmed using an RFID reader.Using an RFID printer is a good choice if you need to write a lot of tags at once.Printing and encoding tags at the same time will be possible with this method.

  • Install the Tags. It is the process of attaching the RFID tag to an asset or location that you want to track.You would attach an RFID tag to each item in a warehouse to track inventory.

  • Install RFID Readers. RFID readers are used for reading RFID tags.RFID readers come in a variety of form factors, including handheld readers, desktop readers, and fixed readers.Select the reader that is most suitable for you.

  • Configure the Software. Managing the data collected by the RFID system requires setting up software.An RFID tag is read by software and stored in a database after the data has been configured.

  • Test the System. The system must be tested after it is up and running to ensure it works properly.Data collected by the system can be compared with database data by checking them against each other.

  • Track Your Items. Upon completing the setup, you can begin tracking your assets.The process can be conducted in real-time or at regular intervals, based on your needs.

You can hire anexpert to help you install and configure your RFID tagging system.As a result, you can be sure that the system has been installed correctly and is working properly.

Additionally, ensure your employees are trained on how to use the system.The system will be explained to them so they can learn how to track assets in your company.

How to Attach RFID Tags to Objects?

RFID tags canbe attached to objects in a variety of ways.Most commonly, adhesives are used.It is possible to purchase adhesives in a variety of formulations, including permanent and repositionable types.

The best adhesive for objects that will not be moved frequently is a permanent adhesive.When it comes to moving objects frequently, removable adhesives are most suitable.

RFID tags can also be sewed onto objects using this method.The RFID clothing tag and RFID laundry tag are the most commonly used examples of this.

Other methods of attaching RFID tags to objects include rivets, screws, and bolts.The method you choose depends on your needs.

No matter what size, shape, or material an object is, RFID tags can be attached to it.Ensure that the tag is securely attached to the object to prevent it from being lost or damaged.

Benefits of Using RFID Tags

RFID tags offer many benefits over traditional barcodes, including the following:

  • No Need for Line of Sight. This means RFID tags can be read without being in line of sight of the reader.In a warehouse, this is vital for tracking assets, since it allows you to keep track of items.

  • Long Read Range. Tags with RFID technology have a long read range, meaning they can be read from a distance up to 100 meters.Using this method, you can track assets that are spread out over a large area, such as a construction site.

  • Fast Read Rate. RFID tags are fast to read, making it easy to track many assets at once.Retail stores that have high inventory turnover benefit from this feature.

  • High Capacity. With RFID tags, you can track more data about your assets than you can with barcodes.It is therefore useful for businesses that need to track a lot of data about their assets, like serial numbers, model numbers, and purchase dates.

  • Reusable. You do not need to replace RFID tags every time you need to track a new asset since they can be reused.It saves money in the long run for companies that track a large number of assets.

In addition to the advantages of RFID tags, there are also some disadvantages to keep in mind.

A RFID tag, for example, costs more initially than a barcode.This is due to the complexity and high cost of RFID tags and RFID readers.Additionally, the RFID system must be installed and configured, which increases costs.

RFID technology is also rife with security concerns.Due to RFID tags' ability to be read without the owner's permission or knowledge, it is illegal to use them.It is therefore imperative to take measures to protect RFID tags' data.

However, RFID tags are a popular technology with many advantages over traditional barcodes.Tracking assets in your business with RFID tags could be a good idea.

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