Passive RFID Tags vs

Passive RFID Tags vs - Passive RFID Tags vs Active RFID...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Passive RFID Tags vs. Active RFID Tags An RFID tag is a small device that can be attached to or incorporated into a product and transmit data to a reader using radio waves. RFID tags have antennas that allow them to receive and respond to radio-frequency queries from an RFID transceiver. RFID tags come in two varieties: active and passive. Active RFID tags have a built-in power supply, such as a battery, as well as electronics that perform specialized tasks. By contrast, passive RFID tags do not have a power supply and must rely on the power emitted by an RFID reader to transmit data. Thus, if a reader is not present, the passive tag cannot communicate any data. Active tags can communicate in the absence of a reader. The remainder of this article discusses other differences between the two types of tags that may influence your decision to choose one type over the other when deploying your RFID application. Passive RFID Tags Passive tags are comprised of three elements: an integrated circuit or chip, an antenna, and a substrate. The RFID chip stores data and performs specific tasks. Depending on its design, the chip may be read-only (RO), write-once, read-many (WORM), or read-write (RW). Typically, RFID chips carry 96 bits of memory but can range from 2-1000 bits. Attached to the chip is the antenna, whose purpose is to absorb radio-frequency (RF) waves from the reader's signal and to send and receive data. Passive RFID tag performance is strongly
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/27/2010 for the course EE 600 taught by Professor Aodafkdlja during the Spring '10 term at Aarhus Universitet.

Page1 / 3

Passive RFID Tags vs - Passive RFID Tags vs Active RFID...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online