433 MHZ. RFID Card Tag Active - GAO RFID Asset Tracking
433 MHZ. RFID Card Tag Active - Request Further Information About this Product
433 MHZ. RFID Card Tag Active - Overview:
An internal battery powers the Wavetrend L-series of Active Tags. The Personnel Tag will, for the duration of its life, transmit a Radio Frequency (RF) signal at a pre-set time-interval. The Tag life is estimated at 5 years at a transmission time interval of approximately 1.5...
Website:
http://www.gaorfidassettracking.com
433 MHZ. RFID Card Tag Active - GAO RFID Asset Tracking
433 MHZ. RFID Card Tag Active - Request Further Information About this Product
433 MHZ. RFID Card Tag Active - Overview:
An internal battery powers the Wavetrend L-series of Active Tags. The Personnel Tag will, for the duration of its life, transmit a Radio Frequency (RF) signal at a pre-set time-interval. The Tag life is estimated at 5 years at a transmission time interval of approximately 1.5...
Website:
http://www.gaorfidassettracking.com
Disadvantages of RFID. Mostly Minor Or You Can Minimize Them.
Many of the Disadvantages of RFID are minor, and if you can minimize the rest, you can reap the significant benefits that RFID technology has to offer.
While Radio Frequency IDentification technology may be right for a large operation, for a smaller one you may want to consider the setup and ongoing costs carefully, and compare them with other technologies such as bar coding.
Before deciding,...
Website:
wireless-technology-advisor.com
Related topics : active rfid tag read range / passive rfid tags advantages and disadvantages / rfid active reader passive tag / active rfid tags and readers price / passive rfid tag read range
RFID Track on the App Store - itunes.apple.com
iPad
Description
RFID Track connects to our demo server when first installed, so that users can immediately test the functionality of the app and test the capabilities of an RFID Track Server as proof of concept prior to purchase.
RFID Track is an application for asset tracking, that when used in conjunction with the RFID Track Plugin v2.2 or later for Indigo Pro v6.x or later Software, Homeseer...
Date: 2019-04-10 22:07:24
Website:
https://itunes.apple.com
Disadvantages of RFID. Mostly Minor Or You Can Minimize Them.
Disadvantages of RFID
Most Are Easy to Overcome
Many of the Disadvantages of RFID are minor, and if you can minimize the rest, you can reap the significant benefits that RFID technology has to offer.
While Radio Frequency IDentification technology may be right for a large operation, for a smaller one you may want to consider the setup and ongoing costs carefully, and compare them with other...
Website:
wireless-technology-advisor.com
125 kHz RFID tag reader uses FSK to reduce collisions ...
The RFID (radio-frequency identification) system consists of an RFID tag, a reader, and a user-interface computer. The passive RFID tag contains a silicon chip and an LC antenna circuit. The passive tag is energized by an RF field that's transmitted by the reader (interrogation). Therefore, the tag doesn't require any batteries for its operation.
Passive RFID tags are used for animal tagging,...
Date: 2019-04-10 21:52:41
Website:
electronicdesign.com
STMicroelectronics ST25DV Dynamic NFC/RFID Tag | New ...
ST25DV Dynamic NFC/RFID Tag | New Product Brief
STMicroelectronics ST25DV Dynamic NFC/RFID Tag | New Product Brief
September 01, 2017 by Mouser Electronics
This New Product Brief (NPB) is part of a video series highlighting the features, applications, and technical specs of newly-released products.
ST25DV�Dynamic NFC/RFID Tag
ST's ST25DV is a dynamic NFC and RFID tag that provides fast data transfer between the tag's host MCU and an NFC phone or reader. The devices can connect to a host MCU over an I2C interface and have a 256 byte buffer that enables the fast transfer mode....
Date: 2018-01-12 06:57:19
Website:
allaboutcircuits.com
Related topics : tag rfid nfc / rfid tag product / nfc rfid reader writer / nfc rfid reader / nfc rfid writer
125 kHz RFID tag reader uses FSK to reduce collisions ...
The RFID (radio-frequency identification) system consists of an RFID tag, a reader, and a user-interface computer. The passive RFID tag contains a silicon chip and an LC antenna circuit. The passive tag is energized by an RF field that's transmitted by the reader (interrogation). Therefore, the tag doesn't require any batteries for its operation.
Passive RFID tags are used for animal tagging,...
Date: 2017-03-04 02:17:28
Website:
http://electronicdesign.com
Related topics : 125 khz rfid tag reader / passive rfid tag and reader / rfid active reader passive tag / passive rfid tag reader / rfid tag reader circuit diagram
Organize, Track, Identify: A New RFID Tag IC from STMicro
Organize, Track, Identify: A New RFID Tag IC from STMicro
Organize, Track, Identify: A New RFID Tag IC from STMicro
April 27, 2017 by Robert Keim
RFID is an advanced technique for attaching information to objects of all kinds, and ICs such as the ST25DV series can help you to implement this technology.
Those of us who have no experience with manufacturing environments or shipping warehouses...
Date: 2018-01-12 07:58:19
Website:
allaboutcircuits.com
BIC > RFID Privacy in Libraries
What Librarians (Public & Academic), Library Suppliers and Library Systems Vendors Need to Know
Radio Frequency IDentification (RFID) in libraries involves the tagging of library books with RFID tags and the use of self-services kiosks and other technologies to enable library customers to self-issue and self-return library books. The EU has issued two mandates for member states to encourage them...
Website:
http://www.bic.org.uk
Related topics : library book rfid tag / library rfid tags / rfid technology used in library / library using rfid / rfid library system technology
SAP RFID?
Archived discussions are read-only. Learn more about SAP Q&A
SAP RFID?
What is meant by SAP RFID?
thanks,
May 05, 2006 at 19:17 PM
0 Likes
March 31, 2006 at 06:54 AM
hi..
Radio Frequency Identification (RFID) is an automatic identification method, relying on...
Website:
https://archive.sap.com
Related topics : radio frequency identification tags (rfid) / rfid radio frequency identification tags / radio frequency identification device rfid / radio frequency identification (rfid) chip / radio frequency identification rfid chip
Evolution of RFID Applications and Solutions
Evolution of RFID Applications
Evolution of RFID Applications
in Articles tagged RFID applications / RFID solutions by jeffcraighead
Radio frequency identification (RFID) comes under the category of automatic identification technologies. This technology uses radio waves to transmit data from an RFID tag that is attached to an object. The information obtained can be read from a large distance...
Website:
silentpartnertech.com
DoD RFID Compliance Mandate - AB&R (American Barcode and RFID)
DoD RFID Compliance Mandate
In January 2005, the�U.S. Department of Defense�(DoD) issued a mandate to its suppliers that each item sold to them must be marked with a passive�radio frequency identification�(RFID) tag. The need for this mandate arose from decades of logistical challenges faced by the military with regard to the supply chain. Implementing RFID technology to enhance existing...
Website:
http://www.abr.com
Related topics : achieving supply chain integration using rfid technology / improvement of supply chain performances using rfid technology / dod rfid mandates / rfid tag data format / dod rfid tag
Antenna Design for UHF RFID Tags-Review and a Practical ...
an overview of antenna design for passive radio frequency identification (RFID) tags is presented. We discuss various requirements of such designs, outline a generic design process including range measurement techniques and concentrate on one practical application: RFID tag for box tracking in warehouses. A loaded meander antenna design for this application is described and its various practical...
Website:
http://www.engpaper.com
Related topics : antenna design for uhf rfid tags a review and a practical application / new design antenna for rfid uhf tags / dipole antenna design for uhf rfid tags / antenna design for uhf rfid tags / rfid tag antenna design
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...
Website:
http://musicfestivalsrfid.com
BBC NEWS | Technology | 'Magic ink' that makes metal grow
The metal printing technique replaces conventional copper etching by using a special ink which attracts metals.
It means antennas for tiny mobiles or radio frequency identification (RFID) tags, used for tracking goods, could be made cheaply and quickly.
RFID tags are tiny microchips with unique codes. Experts predict they will be big business by 2006.
They are widely tipped to replace eventually...
Website:
http://news.bbc.co.uk
RFID Asset Tag Manufacturer | Universal RFID By Metalcraft
Email: info@universalrfid.com
Metalcraft is an innovative manufacturer of custom tags for identifying, tracking and controlling property, products and processes....
Website:
http://www.universalrfid.com
Related topics : universal mini rfid asset tag / rfid tags product tracking / rfid tag production process / rfid tags for asset tracking / rfid asset management tags
Passive RFID Reader Wi-Fi | Smart Cards & RFID Solutions ...
Passive RFID reader Wi-Fi is a battery operated device that works in the presence of active RFID enabled readers or tags. In most cases a passive RFID reader Wi-Fi is used to receive the signals from active RFID tags in order to authenticate or...
Website:
http://www.chipsilicon.com
Ten Problems with RFID security threat - USRIOT
And other security devices, security, RFID devices are not perfect. Although RFID equipment has been widely used, but the security threats we need to resolve before the device deployment. This article will focus on several RFID-related security issues.
Ten Problems with RFID security threat
1.RFID forgery
According to the calculation capability, RFID can be divided into three categories:
1....
Website:
https://www.usriot.com
Long range, high performance RFID labels
PowerID provides long range, high performance UHF radio frequency identification (RFID) tags for challenging environments that contain metals or liquids.
PowerID's RFID labels utilize battery-assisted, passive (BAP) RFID technology for applications such as...
Date: 2017-03-04 00:14:33
Website:
http://www.power-id.com
Related topics : long range passive rfid tag / passive uhf rfid tag range / passive rfid tag frequency range / uhf rfid tag for metal containers / radio frequency identification tags (rfid)
Free RFID Software Tools - Click or Call 888.237.8525 ...
We offer free RFID software tools to test RFID tags and labels in your environment using fixed readers, or download to your RFID handheld. Zebra Technologies, offers these outstanding free software tools to assist with testing and analyzing RFID labels and tags. Contact us for assistance with any RFID project.
PowerSession is a PC-based tool and demonstrates several capabilities of the reader...
Website:
https://www.barcodefactory.com
RFid Based Attendance Management System | Microtronics ...
Download Synopsis of the project
Your Name. (required)
Subscribe to Newsletter
Description:
Attendance needs to be taken at various places including colleges, school for students and in the industries for the login logout time of employees. Radio Frequency Identification (RFID) based attendance management system can be used in any college or university or company. Main objective of RFID based...
Website:
projectsof8051.com
Related topics : rfid id card reader / rfid card reader program / what frequency do credit card rfid use / credit card rfid tag / rfid time card system
DoD RFID Compliance Mandate - AB&R
DoD RFID Compliance Mandate
DoD RFID Compliance Mandate
In January 2005, the U.S. Department of Defense (DoD) issued a mandate to its suppliers that each item sold to them must be marked with a passive radio frequency identification (RFID) tag. The need for this mandate arose from decades of logistical challenges faced by the military with regard to the supply chain. Implementing RFID technology...
Website:
http://store.abr.com
Related topics : achieving supply chain integration using rfid technology / improvement of supply chain performances using rfid technology / dod rfid compliance / dod rfid mandates / dod passive rfid tags
Radio Frequency Identification (RFID)
Proper Radio Frequency Identification Tag Placement for Government shipments.
Vendors must use EPC global Class 1 Gen 2 compliant tags only after February 28, 2007.
An interim DFARS rule amended DFARS 211.275-2 to include additional commodities and DoD locations that require package marking with passive RFID tags at the case and palletized unit load levels on May...
Date: 2017-01-16 16:24:25
Website:
http://www.wingovernmentcontracts.com
A CMOS Pressure Sensor Tag Chip for Passive Wireless ...
This paper presents a novel monolithic pressure sensor tag for passive wireless applications. The proposed pressure sensor tag is based on an ultra-high frequency RFID system. The pressure sensor element is implemented in the 0.18 µm CMOS process and the membrane gap is formed by sacrificial layer release, resulting in a sensitivity of 1.2 fF/kPa within the range from 0 to 600 kPa. A three-stage...
Website:
https://www.ncbi.nlm.nih.gov
How does a UHF RFID System Work? - dipolerfid.com
How does a UHF RFID System Work?
Created at 12 of December of 2016
How does a UHF RFID System Work?
The RFID reader emits radio waves of specific frequencies through RFID antennas. The waves "give energy" to the tags so that they can communicate by emitting a unique ID. They do not need batteries and can be used for many years. The reader processes the data so that we can integrate them into our...
Website:
http://www.dipolerfid.com
RFID system technology - Centre National RFID
1. The components of a RFID system
�
�
�
RFID system:�A RFID system (Radio Frequency Identification) is composed of various parts - one or more transponders (also called TAGs or labels) and one or more interrogators (also called readers or coupling devices).
�
RFID Interrogator: These devices are radiofrequency (RF) emitters which activate the TAG passing near the antenna in order to...
Website:
http://www.centrenational-rfid.com
Related topics : radio frequency identification rfid systems / active rfid tag frequency range / radio frequency identification tags (rfid) / rfid radio frequency identification tags / high frequency rfid tag
ATEX Active WiFi & RFID Tag iTAG100 - English
ATEX Active WiFi & RFID Tag iTAG100
ATEX Active WiFi & RFID Tag iTAG100
Call for price
For more information about how to use this product, please click here for more information .
The iTAG100 is a small, long-life Wi-Fi based Active RFID device that can be placed on any asset, allowing the Extronics system to locate assets that are not Wi-Fi enabled.
SKU: atex_id_544
For more information about...
Website:
http://www.atexshop.com
433 MHZ. RFID Asset Tag Active
433 MHZ. RFID Asset Tag Active - Request Further Information About this Product
433 MHZ. RFID Asset Tag Active - Overview:
An internal battery powers The Wavetrend series of Active Asset Tags. The Asset Tag will, for the duration of its life, transmit a Radio Frequency (RF) signal at a pre-set time-interval. The Tag life is estimated at 5 years at a transmission time interval of approximately 1.5 seconds. The life span of the Tag ends when the battery life is exhausted. Battery status can be inferred by interrogating the internal Tag Age Counter Value.
The transmitted Tag data includes Customer Site Code (CSC), Tag ID,...
Website:
http://www.gaorfidassettracking.com
Related topics : 433 mhz active rfid tags / active rfid asset tags / active rfid tag battery life / 433 mhz rfid tag / 433 mhz active rfid
3M Library Systems Upgrades ‘Basic’ RFID Tag to 1K of ...
3M Library Systems Upgrades 'Basic' RFID Tag to 1K of Memory
Tags Are Accelerated-Age-Tested to Ensure Long-Term Reliability; Can Be Custom Printed by User
Category:
sábado, Junho 28, 2008 11:00 am CDT
Dateline:
NYSE:
MMM
"The memory capacity is large enough for future applications, and users are provided with another tag option to meet their price needs. These are ...
Date: 2017-03-04 02:09:59
Website:
http://news.3m.com
Related topics : 3m library rfid tags / 3m rfid library security system / rfid tag library management system / 3m rfid library solutions / library management system using rfid
ISO/IEC 20248 - Wikipedia
Description[ edit ]
ISO/IEC 20248 can be viewed as an X.509 application specification similar to S/MIME . Classic digital signatures are typically too big (the digital signature size is typically more than 2k bits) to fit in barcodes and RFID tags while maintaining the desired read performance. ISO/IEC 20248 digital signatures, including the data, are typically smaller than 512 bits. X.509...
Date: 2017-02-16 03:01:59
Website:
https://en.wikipedia.org
Related topics : radio frequency identification device rfid technology / radio frequency identification technology (rfid) / radio frequency identification technology rfid / rfid tags replace barcodes / rfid barcode tags
Design of RFID tag antennas using an inductively coupled ...
(Show Context)
Citation Context
...(O hm ) real imagsFigure 31.sInput impedance of the simulated 915 MHz UHF RFID sshape antenna.santenna input impedance (Zant =59.7 +j96.4) is lower around 915 MHz compared tosinductively coupled feed =-=[39]-=- matching networks. Antennas designed using inductivelyscoupled feed structures yield high phase angles (i.e. Zant = 6.2 +j127). As explained in thespaper...
Website:
http://citeseer.ist.psu.edu
RFDUMP.org
About
What is RFDump
RFDump is a backend GPL tool to directly interoperate with any RFID ISO-Reader to make the contents stored on RFID tags accessible. This makes the following types of audits possible:
Test robustness of data-structures on the reader and the backend-application
Proof-of-concept manipulations of RFID tag contents
Clone / copy & paste User-Data stored on RFID tags
Audit...
Website:
http://www.rfdump.org
Related topics : types of rfid tags and readers / rfid tag and reader working / rfid security tag reader / different types of rfid tag / types of rfid tags
Mount on Metal RFID UHF Label/Tag : Barcode Technologies Ltd
Mount on Metal RFID UHF Label/Tag
Mount on Metal RFID UHF Label/Tag
Mount on Metal RFID UHF Gen2 Class1 Label/Tag - This construction is similar to the single-sided acrylic UHF label/tag. However, a foam adhesive is used to mount to a metal surface providing an isolator or standoff so the Radio Frequency RF is successfully transmitted to the reader or interrogator. We use 3/16" thick closed cell foam with both sides coated with an acrylic adhesive. This foam construction will resist chemicals.
Foam Adhesive
Print Copy: variable data such as bar code and/or human readable
Affixing Method: different thicknesses of foam...
Website:
http://www.barcode-uk.com
The role of RFID in the smart factory
RFID technology will have a big role to play in the smart factory of the future, enabling 'things' to communicate in real-time with manufacturing systems.
In Europe we call it Industry 4.0, cyber-physical systems and the 'internet of things' (IoT). In America it comes under the umbrella of the Smart Manufacturing Leadership Coalition or the Industrial Internet. However, we are all alluding to the...
Website:
http://www.controlengeurope.com
How have the capabilities and cost of RFID tags evolved?
Evaluate Weigh the pros and cons of technologies, products and projects you are considering.
How have the capabilities and cost of RFID tags evolved?
by
Ann Grackin
ChainLink Research
In the past, the cost of RFID tags has limited where RFID could be used. Today, lower prices and more advanced capabilities are starting to enable wider, more effective use.
Sections
Share this item with your...
Website:
http://searcherp.techtarget.com
Library Automation Using RFID ~ Computer Science and ...
In the ensuing discussions we will see how RFID technology is recommended for library automation. RFID technology is not just there to tags books and other library assets; it will provide a comprehensive route for enhancing all library services and upgrade operations for everyone concerned with the library.
Issues: During a day, library managers have to supervise many activities within their...
Date: 2017-02-01 17:35:39
Website:
http://necsea.blogspot.com
Related topics : library shelf management system using rfid technology / rfid tag library management system / smart library management system using rfid / rfid library system technology / rfid library management system video
How have the capabilities and cost of RFID tags evolved?
Evaluate Weigh the pros and cons of technologies, products and projects you are considering.
How have the capabilities and cost of RFID tags evolved?
by
Ann Grackin
ChainLink Research
In the past, the cost of RFID tags has limited where RFID could be used. Today, lower prices and more advanced capabilities are starting to enable wider, more effective use.
Sections
Share this item with your...
Website:
http://searchmanufacturingerp.techtarget.com
Related topics : low cost low power uhf rfid tag with on chip antenna / rfid tags used in retail / battery assisted passive rfid tags price / uhf rfid active tag price / uhf passive rfid tags price
Rfid Tag Block Diagram – cubefield.co
Rfid Tag Block Diagram
Rfid Tag Block Diagram
0 Comment
Rfid Tag Block Diagram The Wiring Diagram Readingrat at Block diagram
Rfid Tag Block Diagram While employing the expression block structure, we're referring to a complete sub-set of program diagrams, which use a succession of blocks to represent actions or components, and linking lines which reveal the association between...
Website:
http://cubefield.co
Related topics : rfid tag block diagram / rfid block diagram / rfid tag production process / rfid tag size / rfid blocking products
Pros and Cons: The Use of RFID for Inventory Management
In warehouses, distribution centers, and facilities that have deployed automated inventory management technology, barcode labels have become standard operating procedures. But RFID has become� a bigger part of the inventory management equation, especially in retail where a number of large companies are using the tags to track goods at the pallet, case, and even item-level at the retail shelf....
Website:
http://www.questsolution.com
CPU Card, Smart Cards, NFC Sticker, Animal Ear Tag, RFID ...
IDRFID Technology Co.,Ltd is one of the leading CPU card, smart cards, NFC sticker, animal ear tag, RFID wristband manufacturers and suppliers, welcome to buy smart cards from us. The company has advanced electronic tags and fully automated production...
Website:
http://idrfidtag.com
Are keys or RFID tags more secure access control solutions?
��
�
Are higher-security RFID tokens susceptible to power analysis attacks? As for "cloning keys from space", that's funny :) -� Deer Hunter Jul 18 '13 at 5:35
1
�
@DeerHunter a power analysis attack would be against a specific installation or implementation, not against the underlying technology itself. Perhaps, for example, model X123 would be vulnerable if installed according to...
Website:
security.stackexchange.com
Related topics : rfid based security and access control system / rfid key tag / rfid security tag reader / rfid tag security issues / rfid tag reader system
RFID Inventory Management System | Million Tech
News & Events
RFID Inventory Management System
Million Tech's RFID Inventory Management System is an integrated platform for all kinds of stock items in your organization.
Million Tech's RFID Inventory Management System consists of
- RFID readers (RFID scanners)
- RFID tags, which are embedded with microchips and tiny electromagnet antennas
Each of your stock items will be attached to a RFID tag....
Website:
https://milliontech.com
UHF RFID Tags vs. HF RFID Tags – Part 2 | RFIDTags Blog
It seems I hear less and less each week about how High Frequency (HF) is the best frequency for item level tagging. As near field UHF (Ultra high frequency) continues to mature one by one the advantages and myths continue to disappear.
1. UHF RFID tags are affected by liquids
UHF far field is affected by...
Website:
http://rfidtags.com
Related topics : hf vs uhf rfid tags / uhf gen 2 rfid tag / near field uhf rfid tag / uhf rfid tags frequency / uhf rfid tag reader
DOD clarifies RFID requirements -- FCW
Final DOD RFID Rule
Related Links
The Defense Department has issued its final rule for use of radio frequency identification tags by its suppliers, extending how long they can use older tags and mandating the use of tags even on low-value shipments from low-volume suppliers. DOD cited efficiencies gained in the supply chain through RFID use.
DOD said in a Federal Register notice on Feb. 12 that...
Website:
https://fcw.com
UHF RFID Tag,RFID Tag Customize,RFID Reader,SLon ...
Actual Price:
Add to Cart
Our price is lower than the manufacturer's "minimum advertised price." As a result, we cannot show you the price in catalog or the product page.
You have no...
Website:
http://www.uhfrfidtag.com
Related topics : rfid tag and reader price / rfid tag reader price / uhf rfid tags price / uhf rfid tag reader / uhf rfid reader price
Specimen Tracking System | Sample Tracking System
Lab Accuracy for Patient Safety.
Track samples in real-time to enhance productivity!
Talk To An Expert
What�can our RFID Specimen Tracking do for your Laboratory?
The GAO Specimen Tracking System is a complete solution that tracks specimen samples in real-time as they are collected and progress through the delivery cycle to their destination laboratories. Once securely received, the specimen...
Website:
gaorfid.com
Arduino RFID Access Control with EM-18
The use of Radio Frequency IDentification (RFID) technologies is growing. Many different applications are implemented in various sectors, and used for very different purposes. RFID enables wireless data collection by readers from electronic tags attached to or embedded in objects, for identification and other purposes. This article describes the construction of a simple Arduino RFID...
Website:
http://www.electroschematics.com
Arduino Tutorial: RFID Tutorial RC522 with an Arduino Uno ...
Are you interested in an Arduino RFID project? In this video we take a look at the RFID RC522 reader and writer, and we learn how to use it with Arduino. We also use an OLED display to read the UID of the RFID tags. Let's start!
Today we are going to build a very interesting project. For the first time we are going to use RFID tags with Arduino. I have built a simple project which reads the Unique ID (UID) of each RFID tag we place close to the reader and displays it on this OLED display. If the UID of the tag is equal to a predefined...
Website:
youtube.com
DOD uses RFID for logistics tracking -- Defense Systems
DOD uses RFID for logistics tracking
Radio frequency identification is already established in the realm of defense logistics, helping to keep tabs on the mountains of materiel moved through the military services' supply chain. But RFID applications are also moving beyond those needed for supply chain visibility.
By Brian Robinson
Mar 24, 2008
Radio frequency identification is already established...
Website:
https://defensesystems.com
Related topics : difference between passive and active rfid tags technology / active rfid tag in real time location system / active rfid tag uses / rfid active tag technology / asset tracking system using rfid