Questions & Answers on RFID

Ultra High Frequency (UHF) RFID Tags & Systems

May 2, 2018

The Ultra High Frequency (UHF) band is the frequency range from 300 MHz to 1 GHz. RFID systems that operate in this frequency band are called Ultra High Frequency (UHF) RFID Systems. UHF RFID tags/readers usually operate at 433 MHz and from 860 to 960 MHz. UHF RFID tags operate using the far-field radiative coupling principle or backscatter coupling principle.UHF RFID tags have a much higher read ...read more

Circular Polarization vs Linear Polarization for RFID Applications

RFID

Editorial Team

May 15, 2018

EM waves usually travel in two main modes i.e Linearly Polarized (Vertical or Horizontal) or Circularly Polarized (RHCP or LHCP). When EM waves propagate in a single plane either horizontal or vertical, it is called as linear propagation. And when EM waves propagate in a manner where the amplitude of the waves are constant but they rotate with time, it is called circular polarization.Antenna polar...read more

Microwave Frequency (SHF) RFID Tags & Systems

RFID

Editorial Team

May 2, 2018

RFID systems that operate at microwave frequencies at 2.45 GHz and 5.8 GHz are known as SHF (Super High Frequency) RFID Systems. The frequency range in which SHF RFID systems operate are those which are globally unlicensed, allowing these systems to be used globally. However, these frequency bands are crowded and can be prone to interference as many devices such as cordless phones and microwave ov...read more

What are Battery Assisted Passive (BAP) RFID Tags?

RFID

Editorial Team

May 3, 2018

Battery Assisted Passive RFID Tags are passive RFID tags with an embedded battery. When a BAP tag receives an RF signal from an RFID reader, it turns on the embedded battery which in turn powers the RFID Tag IC, sensors or actuators in the tag. The RFID tag information is then sent to the RFID reader using backscatter. So its operation principle is similar to passive tags, i.e. its battery only tu...read more

Low Frequency (LF) RFID Tags & Systems

RFID

Editorial Team

May 2, 2018

The Low Frequency (LF) band is the frequency range from 30 KHz to 300 KHz. RFID systems that operate in this frequency band are called Low Frequency (LF) RFID Systems. LF RFID systems operate at 125 KHz and at 134 KHz (depending on the application and on the country where it is being used). The LF tags are based on inductive coupling technology which means that the RFID reader induces a current in...read more

High Frequency (HF) RFID Tags & Systems

RFID

Editorial Team

May 2, 2018

The High Frequency (HF) band is the frequency range from 3 to 30 MHz. RFID systems that operate in this frequency band are called High Frequency (HF) RFID Systems. HF RFID tags/readers usually operate at frequencies from 1.75 MHz to 13.56 MHz. NFC (Near Field Communications) is a sub-set of RFID and also operates in the high frequency (HF) band.HF RFID tags are based on inductive coupling technolo...read more

What is the difference between read only and read-write RFID Tags?

RFID

Editorial Team

May 15, 2018

Read-Only Tags have a unique serial number associated with them i.e they just have this serial number stored in the RFID Tag IC. This serial number is added to the tag at the time of manufacturing and cannot be updated or modified. These tags do not have any additional memory. They are widely used in applications that required simple identification like clothing stores and other applications which...read more

BAP RFID Tags vs Active RFID Tags

RFID

Editorial Team

May 3, 2018

The main difference between BAP (Battery Assisted Passive) RFID Tags and Active RFID tags is that BAP tags only respond once the RFID reader sends it an RF Signal. Active tags on the other hand, can send out a signal to the RFID reader independently from time to time i.e even when there is no reader nearby. Active tags can even initiate the communication with an RFID reader.Other differences betwe...read more

What is a Chipless RFID Tag?

RFID

Editorial Team

May 15, 2018

RFID tags without a silicon IC/microchip/RFID Tag IC are called Chipless RFID Tags. These tags use plastic or conductive polymers instead of silicon-based ICs. They reflect back a portion of the reader's signal with the stored identification data. The reflected signal usually has some sort of unique fingerprint that enables the reader to identify the tag and the transmitted data.Chipless RFID tags...read more

What are RFID Wet Inlays?

RFID

Editorial Team

Aug 29, 2018

RFID Wet Inlays are those that have an adhesive backing making them easy to stick on to surfaces. An RFID Inlay consists of an IC/Chip with a dipole antenna. RFID Wet Inlays are like RFID stickers and are ideal for applications which require a "peel and stick" type of tag.Click here to find RFID Wet Inlays from the leading Tag Manufacturers.

What are RFID Dry Inlays?

RFID

Editorial Team

Aug 29, 2018

RFID Dry Inlays are those that do not have an adhesive backing. RFID Dry Inlays attach an IC and an antenna to a substrate or material. They look like laminated RFID Tags.Click here to find Dry RFID Inlays from the leading manufacturers.

What is NFC?

RFID

Editorial Team

May 15, 2018

NFC or Near Field Communications is a short-range wireless connectivity technology that allows two compatible devices to communicate without contact. NFC allows two-way interactions between electronic devices, helping them perform secure contactless transactions and access digital content within a range of less than 10 centimeters.NFC is a subset of High-Frequency (HF) RFID, operating at a frequen...read more

What is RAIN RFID?

RFID

Editorial Team

Mar 16, 2019

RAIN RFID is a passive (battery-free) wireless technology that connects devices with UHF RFID tags to the cloud/internet. RAIN an acronym of RAdio frequency IdentificatioN. This technology connects the UHF RFID devices to the cloud, so that RFID-based data can be stored, managed and shared via the Internet. A RAIN RFID solution comprises of tags, readers, and software. It uses a reader to read and...read more

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