Bits

High Frequency (HF) RFID tags are based on inductive coupling technology which means that the RFID reader induces a current in the RFID tag which then powers the RFID tag and sends out some basic identification information to the RFID reader.

These tags are usually passive and do not require a power source or battery. They have anti-collision capabilities that allow a single reader to read multiple tags simultaneously.

High Frequency tags also work pretty well with/on metal objects and items having medium to high water content. HF RFID systems are used in a wide variety of applications including ticketing, payments, tracking library books, patient flow tracking and general data transfer applications.

It’s main characteristics:

1. Frequencies from 3 to 30 MHz
2. Read range between 10 cm to 1 meter (3 feet)
3. Moderate sensitivity to radio wave interference
4. Applications include ticketing, payment, and data transfer applications
5. Several HF standards in place
6. Works with metal and liquid
7. Low cost