how does rfid work and can you use it to measure distance

how does rfid work and can you use it to measure distance

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Expert:  GemB replied 10 years ago.

Radio frequency Identification or RFID systems are smart versions of the UPC bar codes. They consist of a scanning antenna which put out radio-frequency signals, a transponder or tag attached to the goods to be identified, a transceiver with a decoder to...

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Website: http://www.justanswer.com

Related topics : passive rfid tag read range / active rfid tag read range / rfid active reader passive tag / passive rfid tag frequency range / active rfid tag frequency range

RFID Definition from PC Magazine Encyclopedia

Definition of: RFID

RFID

(Radio Frequency IDentification) A data collection technology that uses electronic tags for storing data. The tag, also known as an "electronic label," "transponder" or "code plate," is made up of an RFID chip attached to an antenna. Transmitting in the kilohertz, megahertz and gigahertz ranges, tags may be battery-powered or derive their power from the RF waves coming...

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Website: http://www.pcmag.com

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RFID Readers - Long Range RFID Reader | Active RFID Reader ...

Fixed and Handheld RFID Readers

RFID Reader

Choosing the right RFID technology is one of the deciding factors in a successful deployment. As the RFID industry continues to grow, a wide variety of readers are available to address a range of tracking needs. AssetPulse, with its in depth domain expertise, can recommend the optimal hardware for your asset tracking requirements.

Request Demo

Passive...

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Website: https://www.assetpulse.com

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PPT - RFID Tags PowerPoint Presentation - ID:2647780

-Controversy

Electromagnetic Waves

Michael Faraday proposed in 1846 that both light and radio waves are part of electromagnetic energy.

In 1864 James Clerk Maxwell published his theory on electromagnetic fields and found that electric and magnetic energy propagate in transverse waves at the speed of light

In 1887 Heinrich Rudolf Hertz produced and studied electromagnetic waves. He concluded that...

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Website: http://www.slideserve.com

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Advanced RFID Measurements: Basic Theory to Protocol ...

Table 1. Comparison of the Typical RFID Read Range According to Frequency Band (Passive Tags)

While Table 1 compares the read range of passive tags, note that there are actually three RFID tag types: active, passive, and semiactive. Because active and semiactive tags use an onboard power source to power the tag response, they are typically capable of much longer read ranges. Passive tags, on...

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Website: http://www.ni.com

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RFID Detector for 13.56 MHz: Spot RFID tag transmitters ...

RFID Detector for 13.56 MHz: Spot RFID tag transmitters from a distance 2

Project Solutions

RFID Detector for 13.56 MHz: Spot RFID tag transmitters from a distance 2

Published:2011/8/22 22:43:00 Author:Amy From:SeekIC

Gert Baars

A dedicated receiver

The detuning and resonance effects mentioned above take place at rela­tively small distances from the trans­mitter , say, two meters or less...

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Website: http://www.seekic.com

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RFID-Handbook - Active Load Modulation

All Pages

1. Introduction

Inductive coupled RFID systems are being used in a huge number of applications such as payment (credit cards), ticketing (public transport and events), access control (company card) and identity verification (ePass, eID). Inductive coupled RFID systems operated in the 13.56 MHz band and are primarily covered by the ISO/IEC standards 14443, 15693, 18000-3 and 18092. The...

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Website: http://rfid-handbook.de

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RFID tags - TrailerTrailers

RFID tags - Tag types

Active RFID tags

These tags have a small battery built into the tags, batteries can sometimes be replaceable or the unit will be replaced after certain time, normally between 1 year and 7 years.

The advantages and disadvantages of active tags can be summarised as follows;

The active RFID tag cannot function without battery power,...

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Date: 2007-01-02 01:30:49
Website: http://www.trailertrailers.com

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RFID FAQs - Barcoding, Inc.

Check out some of our most frequently asked questions about RFID (radio frequency identification) technology. Since 1998, we've helped companies add the power of RFID to their businesses. We can help you too!

Have a question we didn't cover? Please contact us !

FAQs on RFID Technology and RFID Systems

What is RFID?

RFID, or Radio Frequency IDentification, is a data collection method that...

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Website: http://www.barcoding.com

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Global Control through the RFID Chip - michaeljournal.org

Global Control through the RFID Chip

Written by Yves Jacques on Thursday, 01 October 2009. Posted in Microchips

Total Surveillance and a Cashless Society

These current economic and social crises are leading to a global, financial "melt down" that the powerful global elite are using in order to establish a Global Financial Economic System. This will give centralized power to the United Nation's...

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Date: 2017-03-04 00:40:44
Website: http://www.michaeljournal.org

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RFID-radar — How it works

Trolley Scan(Pty) Ltd

RFID-radar(tm)

Introduction

RFID-radar is one of the most advanced RFID systems available in the world!!

Besides identifying RFID transponders in its zone, the RFID-radar system is able to measure the range and direction of those transponders from the reader antennas.

For those wanting to experiment with this new technology, Trolley Scan have provided a starter system ...

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Date: 2016-11-13 06:41:49
Website: http://www.rfid-radar.com

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EPIC - Children and RFID Systems

ACLU criticizes ID badges at Brittan board meeting , by Kymm Mann, Appeal-Democrat, Feb. 9, 2005.

Privacy Groups Criticize RFID Tags for Kids, Communications Daily, Feb. 7, 2005.

News about the Sutter school RFID trial: , San Jose Mercury News, Jan. 28, 2005.

Introduction

Radio Frequency Identification (RFID) is a type of automatic identification system. The purpose of an RFID system is to enable...

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Website: epic.org

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RFID Personnel & People Monitoring - RFID UHF Antennas ...

 

RFID based Access Control & Parking Management System

Access Control Systems enable to control access of people, employees, visitors, patients and personnel with appropriate access rights to rooms, offices and areas with restricted or controlled access. Control of granting access can be managed by using RFID, RFID based control points and RFID tags. Access control points can be doors,...

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Website: http://www.flexiray.com

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Hitachi Develops World’s Smallest RFID Chip

The Japanese giant Hitachi has developed the world's smallest and thinnest Radio Frequency Identification (RFID) chip. Measuring only 0.15 x 0.15 millimeters in size and 7.5 micrometers thick, the wireless chip is a smaller version of the previous record holder - Hitachi's 0.4 x 0.4 mm "Micro-Chip". The company used semiconductor miniaturization and electron beam technology to write data on the...

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Date: 2017-03-03 12:15:06
Website: http://thefutureofthings.com

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