RFID Card - 13.56MHz PVC Passive RFID NFC Card,NTAG213 ...

Silicone Material 13.56MHz ISO14443A NTAG213 chip NFC bracelets

Silicone Material 13.56MHz ISO14443A NTAG213 chip NFC braceletsBasic Feature:13.56MHz NFC chip is most popular NFC chip ,�NTAG213 NFC chip �with�180 Bytes memory , 144 byte User memory , 132 Max URL ;�NTAG213 can match with all NFC phone ;Most economic RFID chip / bracelets for access control ;Circle shape and silicone...

Read more


Website: http://hfrfidcard.com

RFID Project Ideas For Engineers | Full Circuits With ...

GET A FREE PASS TO IOTSHOW AND INDIA ELECTRONICS WEEK

Radio-Frequency Identification (RFID) is a technology that uses radio-frequency electromagnetic fields to transfer information from a tag to RFID reader for identification purposes. The tags do not require battery power. They derive power from the electromagnetic field generated from the reader. Some tags are also available which have their...

Read more


Website: electronicsforu.com

Tracking your data using RFID | CBC News

Radio Frequency Identification, or RFID, is a generic term for technology that uses radio waves to identify people or objects. Information ranging from a simple serial number to more complex data is carried on a microchip with an antenna that can be as small as a grain of sand.

Social Sharing

CBC News ·

Posted: May 13, 2009 3:16 PM ET | Last Updated: May 19, 2009

Radio Frequency Identification...

Read more


Website: cbc.ca

UHF RFID Components | Midico System

The RFID UHF reader operates at the frequency range 865.6 - 867.6 MHz for the European frequency band. Up to 4 antennas can be connected to the reader. The reader can be set up and controlled remotely over the Ethernet connector. It also includes USB, CAN, GPIO and power connector.

Antennas are connected to the reader.  The antenna in the basic design is covered with a square white plastic. This...

Read more


Website: http://www.midico.eu

The simplest possible RFID emulator | T4F

The simplest possible RFID emulator

 

Before reading this section, you should check first " RFID for nerds and hobbyist ".

Keep in mind that this information applys for low frequency RFID. Several changes

When looking for a low frequency RFID emulator for security testing purposes, you can find several designs out there. However, their complexity can make you think twice before building one.

Is...

Read more


Website: http://www.t4f.org

Related topics : low frequency rfid reader / high frequency rfid reader module / rfid tag emulator / low frequency rfid tag / rfid reader read range

RFID Systems | Software & Hardware | Compare 2017's Best

Looking to get lean? Need an efficient and accurate way to manage your inventory? RFID is the next step in inventory and warehouse management, providing the automation and real-time insights you need to enable more effective and accurate inventory management.

Overwhelmed? We'll help you find your ideal software solution, absolutely�free!

Find out why thousands of businesses trust Software...

Read more

Date: 2017-12-09 23:49:08
Website: https://softwareconnect.com

RFID Systems | Software & Hardware | Compare 2016's Best

Your Recommendations

RFID Systems: Exploring the Spectrum of Available Options

Looking to get lean? Need an efficient and accurate way to manage your inventory? RFID is the next step in inventory and warehouse management, providing the automation and real-time insights you need to enable more effective and accurate inventory management.

Overwhelmed? We'll help you find your ideal software...

Read more

Date: 2017-03-04 00:34:17
Website: http://findaccountingsoftware.com

Related topics : asset tracking system using rfid / rfid for asset tracking and inventory management / radio frequency identification (rfid) asset tracking system / rfid inventory tracking system cost / rfid asset tracking software system

"Circuit Diagram For Based Rfid Based Shopping Trolley ...

Block Diagram. 18_ 2.2 Block Diagram Showing Inside View... of Controller Section. 20_ 2.3 RFID Module. 23_ 3.1 Entire Circuit Diagram. 24_ 3.2 Controller...

Read more


Website: http://www.studymode.com

Related topics : rfid based library management system project circuit diagram / rfid based library management system using 8051 / rfid based library management system project / radio frequency identification device rfid technology / rfid based security system block diagram

RFID Wiki | Fandom powered by Wikia

RFID (radio frequency identification) is a technology that was developed by incorporating the use of electromagnetic or electrostatic coupling in the radio frequency (RF) portion of the electromagnetic spectrum to uniquely identify an object, animal, or person. RFID is coming into increasing use in industry as an alternative to the�bar code. The advantage of RFID is that it does not require...

Read more

Date: 2015-03-11 19:00:42
Website: http://rfidwvu.wikia.com

Related topics : battery assisted passive rfid tag cost / active rfid tag battery life / difference between active rfid tag and passive rfid tag / battery assisted passive rfid tags price / difference between passive and active rfid tags technology

What is an RFID system? - Vilant RFID

An RFID system consists of readers antennas, tags and a computer system. The tag identifies itself to the reader by sending a unique identification number through a radio link. The RFID reader can read or write data from or to RFID tags using radio signals. There is a range of RFID hardware manufacturers, and one can always have more than one...

Read more


Website: vilant.com

RFID Tags manufacturer - Leading RFID Tags Supplier and ...

EverTrend Company Profile

Shanghai EVERTREND Enterprise Co., LTD is a professional RFID Tags and Cards manufacturer in China. The EVERTREND is a rigistered brand with high performance in RFID area. As the professional RFID tags manufacturer and smart cards manufacturer in China, EVERTREND provides many types of RFID cards and RFID tags with various frequency in different shapes, such...

Read more


Website: http://www.rfid-tags-manufacturer.com

Related topics : rfid tags manufacturers in china / rfid laundry tag manufacturers / uhf rfid laundry tags / uhf rfid tags frequency / uhf rfid tags metal

Radio Frequency Identification Tags: Identity Theft Danger ...

In a recent NewsHour report on cybersecurity , we showed security expert Chris Paget , shown above, climbing on a 29th floor hotel balcony in Las Vegas to demonstrate how he could read radio frequency identification tags at "long distances." The RFID tags are embedded in various cards people carry such as access cards to a building or embedded in products at stores. Paget mounted powerful...

Read more

Date: 2017-12-10 04:47:39
Website: https://www.pbs.org

Difference Between RFID and NFC | Difference Between

o Categorized under Technology | Difference Between RFID and NFC

RFID vs NFC

RFID (Radio Frequency Identification) is a tagging technology that is gaining widespread attention due to the great number of advantages that it offers compared to the current tagging technologies being used today; like barcodes. Near Field Communication, or more commonly known as NFC, is a subset of RFID that limits the...

Read more

Date: 2017-03-03 13:51:30
Website: http://www.differencebetween.net

Related topics : difference between passive and active rfid tags technology / difference between active rfid tag and passive rfid tag / difference between active and passive rfid tags / nfc vs rfid difference / radio frequency identification device rfid technology

EPCglobal – Understand RFID Standards

UHF (Ultra High Frequency) (860 - 960 MHz) air interface standards

UHF RFID is probably the most noticed RFID at this time.� While there have been more HF tags issued, the high profile nature of UHF has meant that many more people are aware of UHF RFID.

In the world of RFID, UHF is the newcomer to the fold. HF and LF tags were is use in many places when UHF started to become available. The...

Read more


Website: http://www.understandrfidstandards.com

Benefits of implementing RFID in Supply Chain ... - RFID Arena

Benefits of implementing RFID in Supply Chain Management

14 November 2013

Supply chain management is generally seen as complex and knowledge intensive process. In this article Roksana Parvin, a supply chain management professional, elaborates on the benefits of implementing RFID in supply chain management.

Benefits of implementing RFID in Supply Chain Management

The term Supply chain covers all...

Read more


Website: http://rfidarena.com

Related topics : rfid technology supply chain management / improvement of supply chain performances using rfid technology / rfid supply chain benefits / rfid supply chain management / use of rfid in supply chain management

UHF RFID Technology and its Applications

The UHF RFID technology at a glance

The contactless RFID technology works with a range of a few centimeters to several meters and uses the following frequency ranges: 120 to 150 kHz (low frequency or LF), 13.56 MHz (high frequency or HF) and 860 to 960 MHz (ultra high frequency or UHF). Previous applications such as identification, access control and payment systems are mostly based on passive...

Read more


Website: https://besttopreviewsonline.com

Welcome To the Future! RFID Technology Benefits for Retail

Welcome To the Future! RFID Technology Benefits for�Retail

Radio Frequency Identification (RFID) tags are rapidly replacing the old bar codes that have been used since 1974. Radio Frequency Identification technology has its roots in World War II when this type of technology was used to track airplanes. The concept for utilizing this technology to track retail objects didn't really catch on...

Read more


Website: https://medium.com

New RFID Cards and Lift Access Gates

RFID stands for Radio Frequency Identification Device. Each of our new RFID cards contains a unique microchip that holds information pertaining to your season pass, flex pass, or lift ticket. Your card is automatically read when you approach the access gates at each lift, and the gate will open when your ticket or pass is validated. All in the blink of an eye!

Basic RFID Do's & Don'ts:

DO verify...

Read more


Website: https://www.gunstock.com

Schematics.com | RFID Detector

Radio frequency identification (RFID) are widely used nowadays in industries and commercial applications. The RFID tags can be affixed to an object and used to track and manage inventories and even people. To identify tagged objects, an RFID detector is used which is basically a simple analog electronic circuit that detects 13.56 MHz RFID tags.

RFID tags are...

Read more


Website: http://www.schematics.com

Mammoth Mountain Single & Multi-Day Lift Tickets | Buy Online

Lift Ticket FAQs

What is RFID?

RFID stand for radio-frequency identification. It is a small circuit integrated into your ticket, or season pass card. When you pass through the lift gates, this circuit will register and open the gates for you.

Why is Mammoth Mountain Using RFID?

There are many guest benefits that RFID allows Mammoth Mountain to provide. Benefits include direct-to-lift convenience,...

Read more


Website: https://www.mammothmountain.com

Radio-Frequency Identification (RFID) in the Retail ...

RFID stands for Radio Frequency Identification -- a technology whose use is growing fast, and which has major implications for consumers, particularly with regard to privacy.

What is RFID technology?

As its name implies, RFID is an ID-identification-system. It relies on a small chip that is implanted in a tag. The chip can record and store data, such as a serial number, price or purchase record....

Read more

Date: 2017-03-04 00:58:06
Website: ic.gc.ca

Related topics : rfid tags used in retail / active rfid tag uses / radio frequency identification tags (rfid) / companies that use rfid tags / rfid radio frequency identification tags

Home Page - Music Festival RFID Solutions by PDC

photo credit: Intellitix

PDC RFID Wristbands

It's no secret that the rise of RFID technology is setting a higher standard for festival production. With RFID, festivals have become more than a concert, film viewing, or wine tasting; they're a personalized experience for each individual in the crowd. Instant secure access, cashless payments, and social media integration mean fans no longer have...

Read more


Website: http://musicfestivalsrfid.com

RFID and Barcode Tracking | Patterson Pope

*

*

Please contact us �to learn more and to start discussing how to make the best use of your space.

BARCODE TRACKING

Barcode labels (either separately, or as part of a color-coded label) are placed on folders, assets and other items to be tracked. A barcode reader is used to optically scan or wand the barcode and capture the data to send back to the tracking system, which in turn updates the location or status of that item. These items can be checked in, checked out, and relocated so you'll always know where they are or who has them....

Read more


Website: https://pattersonpope.com

RFID Tag Read Range and Antenna Optimization | COMSOL Blog

Guest Mark Yeoman October 8, 2014

Today, guest blogger and Certified Consultant Mark Yeoman of Continuum Blue shares a numerical modeling example for RFID applications.

We'll look at how we can make use of COMSOL Multiphysics® simulation software to determine the operating read range of a passive RFID tag powered by a reader's interrogating field. Additionally, we will look at how we can...

Read more


Website: https://www.comsol.com

Timing Solutions

RESULTS MANAGEMENT MADE SIMPLE

We offer an end-to-end results management solution!

From fast online registration to results capture, storage�and display, our products cover the entire sports-management�lifecycle. They�can be used independently or as a powerful suite of interlinked products, saving�you time, money and the demands put on your staff and�volunteers.

RESULTSHQ...

Read more

Date: 2017-12-09 22:33:10
Website: http://www.timingsolutions.com.au

Related topics : radio frequency identification rfid systems / radio frequency identification (rfid) / radio frequency identification device rfid / rfid distance frequency

Boycott Gillette - About RFID

 

WHAT IS RFID?

RFID stands for Radio Frequency IDentification, a technology that uses tiny computer chips smaller than a grain of sand to track items at a distance. RFID "spy chips" have been hidden in the packaging of Gillette razor products and in other products you might buy at a local Wal-Mart, Target, or Tesco - and they are already being used to spy on people.

(Photo: © Liz McIntyre...

Read more

Date: 2006-01-02 16:08:37
Website: http://www.boycottgillette.com

Related topics : radio frequency identification device rfid technology / radio frequency identification (rfid) chip / radio frequency identification rfid chip / products containing rfid chips / radio frequency identification technology (rfid)

New RFID Cards & Lift Access Gates - Gunstock Mountain Resort

RFID stands for Radio Frequency Identification Device. Each of our new RFID cards contains a unique microchip that holds information pertaining to your season pass, flex pass, or lift ticket. Your card is automatically read when you approach the access gates at each lift, and the gate will open when your ticket or pass is validated. All in the blink of an eye!

Basic RFID Do's & Don'ts:

DO verify...

Read more


Website: https://www.gunstock.com

A fully integrated UHF RFID reader SoC for handheld ...

A fully integrated UHF RFID reader SoC for handheld applications in the 0.18 m CMOS process

Wang Jingchao, Zhang Chun and Wang Zhihua

2010 Chinese Institute of Electronics

Institute of Microelectronics, Tsinghua University, Beijing 100084, China

Dates

In final form 8 April 2010

Citation

1674-4926/31/8/085005

Abstract

A low cost fully integrated single-chip UHF radio frequency...

Read more


Website: http://iopscience.iop.org

Related topics : fully integrated passive uhf rfid / handheld uhf rfid reader / uhf rfid single chip reader / uhf rfid passive reader / uhf rfid reader chip

Types of RFID - Cal Poly, San Luis Obispo

Partners and Donors

3.��� Types of RFID

The single acronym RFID is used to describe a variety of radio technologies, optimized for different types of applications. �The key distinctions are in the radio frequency band employed for communications, the means by which the RFID tag is powered, and the conventions used for communicating between the tag and the reader.

Electromagnetic waves are...

Read more


Website: http://polygait.calpoly.edu

Murata Develops a Small and Cost Effective RFID UHF Reader ...

Murata Develops a Small and Cost Effective RFID UHF Reader/Writer Module.

Murata Develops a Small and Cost Effective RFID UHF Reader/Writer Module.

9/15/2009

President/ Statutory Representative Director: Tsuneo Murata

Overview

Murata Manufacturing Co., Ltd. has developed an RFID (*1) reader/writer module to be used with today's UHF (*2) band of RFID tags. With its small size, it solves many of...

Read more

Date: 2017-11-08 11:35:05
Website: murata.com

Murata Develops a Small and Cost Effective RFID UHF Reader ...

Murata Develops a Small and Cost Effective RFID UHF Reader/Writer Module.

Murata Develops a Small and Cost Effective RFID UHF Reader/Writer Module.

9/15/2009

President/ Statutory Representative Director: Tsuneo Murata

Overview

Murata Manufacturing Co., Ltd. has developed an RFID (*1) reader/writer module to be used with today's UHF (*2) band of RFID tags. With its small size, it solves many of...

Read more


Website: murata.com

Related topics : cost of uhf rfid reader / uhf rfid reader writer / small uhf rfid reader / uhf passive rfid tag reader / uhf rfid tag reader

Sensitivity and Impedance Measurements on UHF RFID ...

Sensitivity and Impedance Measurements on UHF RFID ...

1. Sensitivity and Impedance Measurements on UHF RFID Transponder Chips Lukas W. Mayer and Arpad L. Scholtz Vienna University of Technology Institute of Communications and Radio-Frequency Engineering Gusshausstrasse 25/389, 1040 Wien,...

Read more


Website: de.slideshare.net

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...

Read more

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

Related topics : rfid radio frequency identification chip implanted in all us citizens / radio frequency identification (rfid) chip / radio frequency identification rfid chip / implant rfid chip technology / radio frequency identification device rfid technology

Global Control through the RFID Chip - Michael Journal

Global Control through the RFID Chip

Written by Yves Jacques on Wednesday, 30 September 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...

Read more


Website: michaeljournal.org

Applications for Active RFID and Passive RFID Technology ...

No comments

RFID technology is divided into three categories - Passive, Semi-passive (also called battery assisted passive or BAP) and Active - based on how the tags obtain power and how they use it to communicate with the interrogator. More technical details regarding differences between these three categories are discussed on our Explore Portal .

What are the technical differences?

The passive...

Read more


Website: http://rfid4u.com

Related topics : passive rfid tag read range / passive rfid tag frequency range / difference between passive and active rfid tags technology / passive rfid tag uses / passive uhf rfid tag range

Why RFID? | Confidex

How to select the right tag?

Confidex tags are compatible with most UHF RFID hardware.

There is a huge variety of different kind of tags available with different properties. And remember, they all are compatible with any Gen2 reader. Reader devices and tags can be selected totally independently based on other requirements in your application.

So, what should you take into account? Read on »

How...

Read more


Website: confidex.com

Related topics : a small passive uhf rfid tag for metallic item identification / antenna design for uhf rfid tags / uhf rfid tags frequency / uhf rfid tags metal / uhf passive rfid tag reader

RFID Tags | Manufacturers of RFID Tag Products

RFID inlays from the top RFID inlay manufacturers

What are RFID Tags?

The term "RFID Tags" is often used as a general term to describe not only RFID Tags but RFID Labels and RFID Cards. It is important to know which frequency your RFID solution operates at and what type of product the tag be affixed to before searching for a RFID tag. If your application is to track a metal tote you would want a RFID tag that is designed to be mounted on a metal surface (Metal RFID Tags). If you need additional information on a particular product please click on the "Request Info" link next to the product.

UHF (Ultra High Frequency) Tags, Labels and Cards operate at a...

Read more


Website: http://www.rfidtags.com

Related topics : passive rfid tag uses / hf rfid tag on metal / passive rfid tag frequency range / hf rfid tag frequency / uhf rfid tags frequency

BBC NEWS | Technology | Q&A: Radio-frequency ID tags

Q&A: Radio-frequency ID tags

Many pets have RFID tags to identify them

More than 270 billion radio-frequency ID tags could be sold around the world by 2016, predicts the European Union. But many people are worried about the impact the technology will have on their lives.

What are radio frequency ID tags?

They are small devices that store data that identifies the object to which they are attached....

Read more


Website: http://news.bbc.co.uk

RFMAX | RFID Reader Antennas for nearfiled UHF Applications

RFID GEAR

RFMAX components are built to the most exacting standards to provide the highest levels of performance and reliability in the industry.

RFID ANTENNAS

R9028-LPV-SSF: RFID Low profile Antennna with 100 mm VESA mounting pattern

These RFID Antennas are for Impinj-Zebra-Alien-ThingMagic RFID Readers.

The RFMAX R9028-LPV-SSF is the newest American Made, low-profile, 100mm VESA mounted, circularly polarized panel antenna for UHF RFID. The mounting profile of this...

Read more

Date: 2017-04-07 14:35:31
Website: http://rfmax.us

Related topics : designing an uhf rfid reader antenna / uhf rfid reader antenna design / uhf rfid reader antenna / antenna design for uhf rfid / alien rfid reader antenna

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...

Read more


Website: pcmag.com

Drivers licences with chips spark heated debate | CBC News

The licences have embedded radio-frequency identification (RFID) chips that can broadcast information wirelessly to a nearby reader. While that can make identifying people much faster and easier, it has also raised fears that the technology could be abused or hacked by ID thieves.

Despite the controversy, federal and provincial governments in Canada are committed to adopting the same model to...

Read more


Website: cbc.ca

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...

Read more


Website: pcmag.com

Related topics : rfid active reader passive tag / rfid passive tag reader cost / active rfid tags and readers price / cost of active and passive rfid tags / passive rfid tag reader price

OMRON RFID Announces Support For Sybase RFID Anywhere

OMRON RFID recently announced availability of a Sybase RFID Anywhere hardware connector1 for its V750 RFID UHF Gen2 reader. RFID Anywhere is a software infrastructure that provides a robust, customizable environment for developing and managing radio frequency identification (RFID) and sensor network solutions of all sizes.

The Omron V750 RFID reader runs on a real-time operating system (RTOS)...

Read more


Website: healthitoutcomes.com

АйТиПроект | RFID-система для инвентаризации основных ...

RFID-system for the inventory of property and control over its movement

How to keep control of all fixed assets in the enterprise?

Why do we need an inventory? At any company, office, hotel it is necessary from time to time to know what material resources are available to the company and to have the relevant documents. But during any inventory process problems with great number of documentation,...

Read more

Date: 2017-03-04 02:07:41
Website: http://www.itproject.ru

Related topics : radio frequency identification technology (rfid) / radio frequency identification technology rfid / radio frequency identification (rfid) asset tracking system / radio frequency identification tags (rfid) / rfid radio frequency identification tags

RFID SYSTEM: ITS TYPES, ADVANTAGES AND DISADVANTAGES ...

RFID SYSTEM: ITS TYPES, ADVANTAGES AND DISADVANTAGES

Text-only Preview

RFID SYSTEM: ITS TYPES, ADVANTAGES AND

DISADVANTAGES

Radio frequency identification or RFID systems is use for

identification of an object or person and wirelessly transmit the

data about the same. RFID systems comprises of antenna, chip,

reader and battery in few types of RFID tags. RFID is mainly

used for transmitting...

Read more


Website: http://pdfsr.com

RFID vs Barcode | QStock Inventory | (408) 252-9000

When considering converting a warehouse system to a new supply chain solution, one decision to be made is whether to go with barcodes or radio frequency identification (RFID). Being able to compare them side by side may help that decision making process.

Radio Frequency Identification

Radio Frequency Identification (RFID) are tags that are placed on products that contain every bit of information...

Read more


Website: http://www.qstockinventory.com

Related topics : radio frequency identification tags (rfid) / rfid radio frequency identification tags / radio frequency identification rfid systems / radio frequency identification device rfid / radio frequency identification (rfid)

RFID shielding wallets don't shield. RFID requires ...

RFID shielding wallets neither disclose the materials used nor any tests performed.

"There are lots of cheap wallets that claim to block RFID but don't. The cheapest one I found that still works is the DIFRwear RFID Blocking Flip Side Wallet in black leather for about $23." http://www.makeuseof.com/tag/what-are-rfid-blocking-wallets-which-should-you-buy/

One customer reported that her dormitory's...

Read more


Website: https://www.reddit.com

Related topics : how to test rfid blocking wallet / where to buy rfid blocking wallet / how to test if rfid wallet works / rfid blocking products reviews / rfid credit card wallet

Security Access Using RFID Reader - Arduino Project Hub

About this project

What is an RFID reader?

RFID tagging is an ID system that uses small radio frequency identification devices for identification and tracking purposes. An RFID tagging system includes the tag itself, a read/write device, and a host system application for data collection, processing, and transmission.

In simple words an RFID uses electromagnetic fields to transfer data over short distances. RFID is useful to identify people, to make transactions, etc...

You can use an RFID system to open a door. For example, only the person with...

Read more


Website: https://create.arduino.cc

Related topics : rfid security system using arduino / rfid tag reader system / radio frequency identification tags (rfid) / rfid radio frequency identification tags / radio frequency identification rfid systems