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rfid tag – jasminetrias.org
rfid tag solutions tags are types of wireless sensors reader writer passive range .
rfid tag temperature range reader software price .
rfid tag cost range uhf kaufen .
rfid tag china 860 960mhz uhf waterproof with...
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http://jasminetrias.org
Passive RFID - Asset ID, UID and RFID Tags and Labels
Passive RFID Information
Some advantages of a passive RFID tag are:
It functions without a battery; passive RFID tags can have a useful life of twenty years or more.
It is typically much less expensive to manufacture passive RFID tags.
It can be much smaller than active RFID tags.
Passive tags are lighter and are less expensive then...
Date: 2011-03-17 02:12:48
Website:
http://www.barcode-rfid-labels.com
Semi-passive RFID Tags - AutoID | Passive Tags | Active Tags
Types of RFID Tags
RFID Tags come in three basic varieties: passive, active, or semi-passive or battery-assisted. RFID Tags and Readers are available in a range of different frequencies with 125kHz, 13.56MHz, 868MHz and 915MHz being the most common frequencies.
Passive RFID Tags: A Passive RF Tag requires no internal power source and generates no RF signals itself. Passive RF Tags are powered by readers when they are in range. They inherit...
Website:
http://www.rftags.co.za
Related topics : how much do active rfid tags cost / passive rfid tag and reader / active rfid tag and reader / passive rfid tag circuit / battery assisted passive rfid tag cost
LS0831 Passive UHF RFID Tag EPC Gen2 (900MHz)
This �LS0831 Passive RFID Tag works with all LinkSprite UHF RFID tag reader/writer.
�
The passive RFID tag uses frequency hopping technique. User can deign their own read/write protocol. The read/write distance is over 10M depending on the...
Website:
http://store.linksprite.com
Advantages and disadvantages of active RFID tags | Oprfid.com
An active RFID tag is one in which battery power is used to supply power to the electronics. This enables greater distances to be achieved as the tag is not dependent upon the received power to provide a reflected signal, and the control and processing circuits can be more sophisticated as in the case of the...
Date: 2017-11-14 02:50:39
Website:
http://www.oprfid.com
Related topics : active rfid tag battery life / active rfid tag range / active and passive rfid tags / semi active rfid tags / active rfid tag distance
HF RFID tag | High Frequency 13.56 MHz RFID Tags
HF RFID tag
HF RFID (13.56 MHz)
The HF inlay and tag has been widely applied, this is a more mature and most dynamic industry.
HF Tags, Labels and Cards operate at a frequency of 13.56 MHz. These types of tags are also "Passive" - no on board power source. 13.56mhz passive rfid tags applications that use HF RFID tags are...
Website:
https://makarfid.com
Related topics : hf rfid tag frequency / hf rfid tag on metal / hf rfid tags / high frequency rfid tag / passive rfid tags applications
RFID Applications and Challenges | IntechOpen
RFID reader can access data of RFID tag and transmit the content from RFID tag to middleware which is a necessary component in RFID application system. The middleware is also the interface software that connects new RFID hardware with legacy enterprise IT systems [ 36 ]. Middleware is used to route data between the RFID networks and the IT systems within an organization. It merges new RFID systems with legacy IT systems.
RFID Reader is also called Interrogator. The RFID reader can read and write data of RFID tag via radio frequency. RFID readers can classify serial reader and network reader according to connection...
Website:
intechopen.com
RFID Tags: Active, Semi-passive, and Passive - Barcoding, Inc.
There are three basic types of RFID tags; active, semi-passive, and passive. Active and semi-passive tags use internal batteries in order to power their internal circuits. Active tags also use their battery to send radio waves to a RFID reader, whereas semi-passive tags rely on the reader to supply power for its broadcasting. Both active and semi-passive tags are most commonly used for large-scale applications that need to be read over greater distances. Because of this, they typically broadcast high frequencies from 850 to 950 MHz and can be read from over 100 feet away.
In contrast, passive RFID tags rely solely on the...
Website:
http://www.barcoding.com
What is RFID?
RFID tags and Inlays consist of three components: a chip, an antenna and a substrate. RFID tags are manufactured in different shapes and sizes depending on the type of application in which they are used.
RFID operates tags can either be Passive (no internal power source), Semi-Passive (passive but includes a battery) and Active which only operate with a battery.
Active Tags: These tags have a longer read range and larger memories than passive tags and usually operate at 455 MHz, 2.45 GHz, or 5.8 GHz frequencies. Typical read range is from 20 to 100m.
Passive Tags:...
Website:
taggitsa.co.za
Advantages of RFID Versus Barcodes - Technovelgy
Advantages of RFID Versus Barcodes
RFID tags and barcodes both carry information about products. However, there are important differences between these two technologies:
Barcode readers require a direct line of sight to the printed barcode; RFID readers do not require a direct line of sight to either active RFID tags or passive RFID tags .
RFID tags can be read at much greater distances; an RFID reader can pull information from a tag at distances up to 300 feet. The range to read a barcode is much less, typically no more than fifteen feet.
RFID readers can interrogate, or read, RFID tags much...
Website:
http://www.technovelgy.com
Related topics : passive rfid tag read range / active rfid tag read range / rfid active reader passive tag / read write rfid tags / rfid tag read range
rfid host system : WHAT IS RFID : RFID Institute South ...
RFID middleware: A set of software components that acts as a bridge between the RFID hardware components and the host application software.
Host application: Software that receives processed and normalized data - sent from the tag - through the reader and the RFID middleware software.
BASICS OF TAGS
WHAT ARE TAGS?
RFID tags are attached to the items that are to be tracked or identified. The tags provide a means to track and manage supply-chain and identification details such as attributes, source, destination and route - for each of the tagged items.
TYPES OF TAGS
The basic types of RFID tags are...
Website:
http://www.rfidtec.co.za
Related topics : passive rfid tag read range / passive rfid tag frequency range / rfid active reader passive tag / semi passive rfid tag range / difference between active rfid tag and passive rfid tag
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...
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
Portable RFID Tag Readers - visionbarcode.com
Download Brochure
What is RFID Tag Reader?
Radio-frequency identification (RFID) utilizes electromagnetic fields to automatically detect and track tags attached to products. The tags store electronically stored information. Passive tags gather energy from a close-by RFID reader's interrogating radio waves. Active tags comprise of a local power source and may operate hundreds of meters from the RFID reader.
How does it work?
Unlike a barcode, it is not required for the tag to be within the sight of the reader, so it could be embedded in the tracked object. RFID systems encompass three elements - RFID tag, RFID reader and an antenna. RFID tags...
Website:
http://www.visionbarcode.com
RFID CHIPS: Active, Semi-passive and Passive RFID Tags
Active, semi-passive and passive RFID tags are making RFID technology more accessible and prominent in our world. These tags are less expensive to produce, and they can be made small enough to fit on almost any product.
Active and semi-passive RFID tags use internal batteries to power their circuits. An active tag also uses its battery to broadcast radio waves to a reader, whereas a semi-passive...
Date: 2017-08-27 13:08:05
Website:
rfid-chips.blogspot.com
RFID - Simple English Wikipedia, the free encyclopedia
Radio-frequency identification (RFID) is a technology to record the presence of an object using radio signals. It is used for inventory control or timing sporting events. RFID is not a replacement for the barcoding , but a complement for distant reading of codes. The technology is used for automatically identifying a person, a package or an item. To do this, it relies on RFID tags. These are small transponders (combined radio receiver and transmitter ) that will...
Date: 2017-02-13 02:01:27
Website:
https://simple.wikipedia.org
Related topics : radio frequency identification tags (rfid) / rfid radio frequency identification tags / rfid active reader passive tag / active rfid tag and reader / active rfid tag reader
RFID tags, RFID readers, RFID solutions - ESSEN RFID india
over barcodes
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Barcode readers require a direct line of sight to the printed barcode; RFID readers do not require a direct line of sight. This applies to passive RFID tags and RFID solutions which can be customized to cater to the RFID India market.
A barcode read range is not more than five to ten feet. RFID tags can be read at distances of up to 50 feet. Xtenna[TM] based RFID can read RFID...
Date: 2015-02-17 12:23:59
Website:
http://www.essenrfid.com
RFID tags, RFID readers, RFID solutions - ESSEN RFID india
over barcodes
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Barcode readers require a direct line of sight to the printed barcode; RFID readers do not require a direct line of sight. This applies to passive RFID tags and RFID solutions which can be customized to cater to the RFID India market.
A barcode read range is not more than five to ten feet. RFID tags can be read at distances of up to 50 feet. Xtenna[TM] based RFID can read RFID...
Date: 2015-02-17 12:23:59
Website:
http://www.essenrfid.com
Related topics : passive rfid tag read range / rfid tag read range / read write rfid tags / rfid tag reader long range / passive rfid tag and reader
Uhf Rfid Rfid Reader Module For Arduino Or To Raspberry Pi ...
Air�cooling(no�need�for�out�install�cooling�fin)
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Product Picture:�
Company Information
Shenzhen Vanch Intelligent was established in2005, one of the earliest UHF RFID products manufacture and application solutions supplier in China.VANCH products were widely used in City Smart transportation, Electric power system, asset and logistics management, the world's top 500...
Website:
alibaba.com
Active RFID Tags VS. Passive RFID Tags - CYBRA Corporation
If you are a novice to RFID technology, perhaps you've been a little confused over the differences between active and passive RFID tags. The difference is actually simple, but that difference makes the two kinds of tags very different when applying them to businesses and industries.
RFID is automated identification technology. RFID tags contain electronically stored information, which can be...
Website:
cybra.com
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,...
Date: 2007-01-02 01:30:49
Website:
http://www.trailertrailers.com
Related topics : cost of active and passive rfid tags / rfid active reader passive tag / active rfid tag battery life / difference between active rfid tag and passive rfid tag / difference between active and passive rfid tags
Active RFID Tags VS. Passive RFID Tags | CYBRA Corporation
by admin | Jun 9, 2015 | Blog | 0 comments
If you are a novice to RFID technology, perhaps you've been a little confused over the differences between active and passive RFID tags. The difference is actually simple, but that difference makes the two kinds of tags very different when applying them to businesses and industries.
RFID is automated identification technology. RFID tags contain...
Website:
cybra.com
Related topics : difference between active rfid tag and passive rfid tag / active rfid tags vs. passive rfid tags / difference between passive and active rfid tags technology / rfid active reader passive tag / active and passive rfid tags
rfid tags price, rfid tag price, rfid tags with low price ...
RFID Tags Price News-January-17-2013
When it comes to RFID Tags, many people naturally think of RFID Tags Price . Subconsciously, people have the mind that nothing for nothing and every little for a halfpenny, which maybe makes them shrink back at the sight of burgeoning RFID technology products because of their feeling of expensive RFID Tags Price. However, luck would have it, as the leading and...
Date: 2017-02-14 13:12:10
Website:
rfid-in-china.com
Related topics : rfid laundry tag manufacturers / rfid laundry tag price / rfid tag production cost / rfid tag label price / high temperature passive rfid 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...
Website:
http://pdfsr.com
PowerID Battery Assisted Passive RFID Tags read at 160+ feet
Typical on-metal passive ISO18000-6C or EPCglobal Class 1 Generation 2 RFID tags read at distances up to 40 feet away. PowerID claims that its Battery-Assisted Passive RFID on-metal durable tags can be read from over 150 feet away. In fact, the PowerM is currently the only battery-assisted, passive RFID tag designed to work directly on metal assets. PowerID designed this version on the PowerM...
Website:
http://www.rfidgs.com
Related topics : passive rfid tag distance / passive rfid tag uses / rfid tag for metal / rfid metal tag / passive rfid tag and reader
Passive RFID | RFID Discovery
Benefits of passive RFID
Passive radio frequency identification (RFID) technology provides a cost-effective solution to automatically identify and locate large numbers of assets or stock in a variety of different organisations including healthcare. In hospitals passive RFID labels can significantly reduce the timespent on checking inventory and locating specific equipment, improving inventory...
Website:
http://rfiddiscovery.com
Related topics : uhf passive rfid tag reader / rfid active reader passive tag / rfid passive tag reader cost / uhf rfid passive reader / passive rfid tag and reader
Fully Integrated Passive UHF RFID Tag for Hash-Based ...
Passive radio-frequency identification (RFID) tag has been used in many applications. While the RFID market is expected to grow, concerns about security and privacy of the RFID tag should be overcome for the future use. To overcome these issues, privacy-preserving authentication protocols based on cryptographic algorithms have been designed. However, to the best of our knowledge, evaluation of the whole tag, which includes an antenna,...
Website:
https://www.semanticscholar.org
Related topics : fully integrated passive uhf rfid / uhf passive rfid tag reader / passive rfid tag uses / passive uhf rfid tag / radio frequency identification tags (rfid)
RFID Tags Past and Present - How RFID Works - HowStuffWorks
RFID Tags Past and Present
Thinkstock/Hemera/ Thinkstock
RFID technology has been around since 1970, but until recently, it has been too expensive to use on a large scale. Originally, RFID tags were used to track large items, like cows, railroad cars and airline luggage, that were shipped over long distances. These original tags, called inductively coupled RFID tags, were complex systems of metal...
Website:
http://electronics.howstuffworks.com
Related topics : rfid active reader passive tag / cost of active and passive rfid tags / active and passive rfid tags / semi active rfid tags / semi passive rfid tags
RFID FAQs | HID Global
In general, an RFID Tag represents memory that can be written in any data format. Some chips are more capable than others, e.g. by providing a file system or reserved memory areas for certain standardized pieces of data. Many proprietary formats exist on the market, but there are also some standardized formats that allow interoperability between tags, readers and applications from different...
Date: 2018-01-12 09:22:28
Website:
https://www.hidglobal.com
What Is an RFID Printer? | eHow
Jupiterimages/Photos.com/Getty Images
Radio-frequency identification tags store and wirelessly transfer data. Often used as an alternative to traditional barcodes, RFID tags provide data storage and communication in various contexts, including retail and industry. RFID printers produce RFID tags. An RFID tag can communicate stored data using either an electromagnetic field or radio waves. Many...
Website:
http://www.ehow.com
Related topics : printing passive rfid tags / rfid tag printers / rfid tag printer / passive rfid tag uses / active rfid tag uses
Active and passive RFID tags buy
passive tags operate due to the energy of the RFID reader magnetic field.
By operation frequency tags are devided into low-frequency (LF), high-frequency (HF), ultra high-frequency (UHF) tags and differentiate...
Website:
https://go-rfid.com
Passive RFID Vehicle Tag - Cashless and Contactless ...
Passive RFID Vehicle Tag
Cashless and Contactless Feuling Using�Secure�Tags
The Passive Tag is a vehicle identifier�which comes in a variety of form factors to�ensure nozzle-in-tank security at the point of refueling.
Passive RFID Tag for Automatic Vehicle Identifications
The Passive Tag is based on the RFID ISO15693 standard operating at a transmission frequency of 13.56MHz.
Passive Tags...
Website:
https://www.otipetrosmart.com
Related topics : passive rfid tag security / passive rfid tag uses / passive rfid tag read range / passive rfid tag frequency range / long range passive rfid tag
RFID - RF Stock Management Controller - Proteus Software
» RFID - RF Stock Management Controller
RFID - RF Stock Management Controller
RF Stock Management - RFID Controller
The Proteus RFID Stock Management Controller provides the ability to record the unique details of each stock item that has an RFID Tag/Label. The tags are read by the RFID Reader to record the location and movement of stock into, around and out of the warehouse providing complete...
Website:
http://www.proteussoftware.com
RFID Solutions for Warehouse Management | RFID Systems
RFID or radio frequency identification is a system that transmits identity in the form of a unique serial number of a product wirelessly. RFID, a type of Auto-ID technology is used to reduce time and labor and improve real time data accuracy. Most commonly, an RFID tag consists of a microchip attached to a radio antenna mounted on a substrate. This technology connects products to the Internet for tracking purposes so that information can be shared with businesses across the...
Website:
https://www.datexcorp.com
The Skinny on RFID - Information Technology Programs
RFID technology is already used in many technologies today. The future of RFID technology seems limitless as new ways to utilize its effectiveness are discovered frequently.
Passive and Active Tags
As stated before, passive RFID tags do not have an internal power supply. There is a minute electrical current induced in the antenna by the radio signal it receives. This small current is enough to...
Website:
https://informationtechnologyprograms.org
What is RFID? - Taggit SA – Tag, track & trace
A host system is a system that manages the flow of data between the RFID readers and tags. This may have a complex structure, where different readers are located across different locations and data flows to the host computer through LANs or the Internet.
RFID Reader
Hand held reader
Fixed reader
A RFID reader can be fixed or hand held and is a device that activates the tag and retrieves the...
Website:
taggitsa.co.za
SAG RFID - RFID Transponder | RFID TAG | PROXIMITY CARD ...
Active RFID Tag uses an internal power source, such as a battery, within the tag to continuously power the tag and its RF communication circuitry. Active RFID tag allows extremely low-level RF signals to be received by the tag (since the reader/interrogator does not power the tag), and the tag can generate high-level signals back to the reader/interrogator. Active RFID transponders are...
Website:
http://www.sag.com.tw
Related topics : passive rfid tag and reader / semi passive rfid tag range / difference between active rfid tag and passive rfid tag / passive rfid transponder tags / difference between passive and active rfid tags technology
32390: Parallax : Serial RFID Reader and 4 Tag Sampler Kit ...
Serial RFID Reader and 4 Tag Sampler Kit
This handy RFID kit (serial version) matches our popular RFID Reader with various assorted tags. Designed in cooperation with Grand Idea Studio , the Parallax Radio Frequency Identification (RFID) Reader Module is the first low-cost solution to read passive RFID transponder tags. The RFID Reader Module can be used in a wide...
Website:
https://www.jameco.com
Powercast’s Multi-Sensor RFID Tags Boast 10 Meter Read Range
The industry's first RFID Sensor Tags which can include multiple sensors in a single tag, and provide the industry's longest read range of 10 meters, or 32 feet.
"We call it high-function RFID because these new passive RFID Sensor Tags have more than 10 times the operational power of standard passive RFID tags enabling advanced features and unparalleled computing power," said Dr. Charles Greene,...
Date: 2017-11-05 11:20:29
Website:
http://www.prweb.com
RFID Key Fobs Explained – SUMOKEY
YELP
RFID Key Fobs Explained
These RFID systems are categorized by the frequency band in which it operates. Low, High or Ultra-high frequency. However, there are two major categories of RFID systems - Active and Passive, and we are explaining each of their types and frequencies below.�
Common Key Fobs
The common key fobs that are primarily used to access Condos, homes, apartment complexes,�...
Website:
https://sumokey.com
Measurement of Effective Reading Distance of UHF RFID ...
For UHF RFID applications, tag usability is a very rough indicator and cannot characterize the performance of a tag accurately. In practice, effective reading distance is the key performance index of a tag. This study proposes chip's turn-on power...
Website:
scirp.org
Related topics : characterization of passive uhf rfid tag performance / uhf rfid tags distance / passive uhf rfid tag / uhf passive rfid distance / passive rfid reading distance
32395: Parallax : USB RFID Reader and 4 Tag Sampler Kit ...
Related products
USB RFID Reader and 4 Tag Sampler Kit
This handy RFID kit (USB version) matches our popular RFID Reader with various assorted tags. Designed in cooperation with Grand Idea Studio , the Parallax Radio Frequency Identification (RFID) Reader Module is the first low-cost solution to read passive RFID transponder tags. The RFID Reader Module can be used...
Website:
https://www.jameco.com
Types of RFID Tags - AB&R® (American Barcode and RFID)
Support
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...
Website:
http://www.abr.com
Related topics : difference between active rfid tag and passive rfid tag / difference between passive and active rfid tags technology / rfid active reader passive tag / active and passive rfid tags / difference between active and passive rfid tags
Key Fob Clone Copy and Duplication | sumokey.com
Sale price $79.75
RFID KEY FOBS EXPLAINED
These RFID systems are categorized by the frequency band in which it operates. Low, High or Ultra-high frequency. However, there are two major categories of RFID systems - Active and Passive, and we are explaining each of their types and frequencies below.�
Common Key Fobs
The common key fobs that are primarily used to access Condos, homes, apartment...
Website:
https://sumokey.com
UHF RFID Printer for RFID paper tags encoding - Alibaba
UHF RFID Printer for RFID paper tags encoding
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l����������Based on proprietary intellectual property development, printer adapt to global band set to work.
l����������Metal structure and industrial level print performance, can be competent for all customer requirements.
l����������Metal structure and industrial level print...
Website:
http://vanch.en.alibaba.com
RFID Solutions for Warehouse Management | RFID Systems
"RFID Inventory Tracking | Eskimo Cold Storage RFID Inventory Management IARW 2014
SLIDESHARE
How to Use RFID to Increase Profitability
VIDEO
RFID Solutions | What Is RFID? | Jamison RFID and Datex
What is RFID?
RFID or radio frequency identification is a system that transmits identity in the form of a unique serial number of a product wirelessly. RFID, a type of Auto-ID technology is used to reduce time and labor and improve real time data accuracy. Most commonly, an RFID tag consists of a microchip attached to a radio antenna mounted on a...
Website:
https://www.datexcorp.com
Related topics : radio frequency identification (rfid) asset tracking system / rfid active reader passive tag / rfid inventory management system / passive rfid tag system / active and passive rfid tags
Barcodes and RFID - Jovix.com
Active RFID tags are commonly used as beacons to track the real-time location of assets via an internal battery. With a long read range and the ability to be read under snow and ice, these prove to be versatile tags for many jobsites.
Battery powered
Typically larger tags built to withstand harsh construction environments
Batteries allow a lifespan of roughly 5 years
Reusable tags
Best area of...
Website:
https://jovix.com
2.45G wireless active Reader/writer and Tag - RFID Shop
2.45G wireless active Reader/writer and Tag
Active RFID technology allow to track the data from tags in long distance broadcasting in frequency ( 2.45 GHz ).
You are able to build up a network of readers for identification, tracking and tagging in all your...
Date: 2010-12-15 15:16:57
Website:
http://rfidshop.com.hk
Minimum Activation Power of a Passive UHF RFID Tags: a Low ...
The reading process depends of the power of electromagnetic signal received by a tag. Thus an accurate characterization of RFID tags is crucial for early adopter in aerospace industry. The present study shows the preliminary approach to characterize the reading distance for UHF RFID passive tag from the low-cost application test deployment.
KEYWORDS: RFID; Application test; Aerospace...
Website:
http://www.scielo.br
How do RFID tags work | Passive Active BAP RFID tags
How do RFID tags work?
In addition to the way they are used, RFID tags can also be classified according to the presence or absence of a radio signal transceiver and an embedded power supply:
Active RFID tags: They embed a radio signal transceiver and a battery to power it. Thanks to the integrated power supply, active RFID tags can activate themselves regardless of the presence of a...
Website:
http://www.veryfields.net
RFID Tag - Battery Assisted Passive Tags - CoreRFID
If you need greater read distances or quicker response times than can be achieved with ordinary RFID tags, the answer may be in battery assisted passive tags.
Conventional RFID tags use the power from the readers signal to turn on and then to run the chip, power the memory and power the transmission back to the reader. As a result the distance between the reader and the tag has to be close enough...
Website:
http://www.corerfid.com