RFID Inlay (HF inlay and UHF inlay)

Posted by sanny111 on June 10th, 2015

Radio Frequency Identification (RFID) is an automatic identification method that stores and remotely retrieves data via an RFID tag or transponder.

Contactless card, also called proximity card, with the chip of low frequency 125KHz, high frequency 13.56MHz, or ultra-high frequency 860~960MHz, achieves contactless transmission of data with electromagnetic waves transmitting data between the RFID chips and reading devices.

An inlay is the functional portion of the RFID label. It is made up of the antenna to which a microchip is attached. The inlay is typically supplied on a substrate or carrier and is called a dry inlay, or if adhesive is added, it is called a wet inlay. In both cases the inlay is often supplied to a converter where it is inserted into a label or tag or whatever type of construction is required for the application.

The first difference is the operating frequency. UHF (Ultra High Frequency inlay) is 860 – 960 MHz depending on the country of use and HF (High Frequency inlay) works at 13.56 MHz.

Generally the operating range for HF is less than 1 foot while UHF can operate at significantly longer distances.There are also differences in performance related to the types of products the inlays or labels are attached to as well as the operating environment.

For this reason, it is always important to consult with an Avery Dennison sales or technical representative or qualified Avery Dennison RFID partner to review your products and requirements and, if warranted, perform a site survey.