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135 selected articles
Proximity card - Wikipedia
Passive cards[ edit ]
Passive 125 kHz cards, the more widely used type which were described above, are powered by radio frequency signals from the reader device and so have a limited range and must be held close to the reader unit. [2] They are used as keycards for access control doors in office buildings. Contactless smartcards are used for all other applications: library cards , contactless...
Date: 2017-02-16 08:59:32
Related topics : radio frequency card reader / radio frequency detection device / radio frequency chip companies / radio frequency chip manufacturers / radio frequency id chip
RFID testing - Wikipedia
Jump to: navigation , search
RFID is a wireless technology supported by many different vendors for tags (also called transponders or smart cards) and readers (also...
Date: 2017-11-25 04:35:12
Related topics : rfid smart card reader / rfid smart tag technology / difference between smart card and rfid
Write once read many - Wikipedia
History[ edit ]
WORM drives preceded the invention of the CD-R and DVD-R . An example was the IBM 3363. [1] These drives typically used a 12 in (30 cm) disk in a cartridge, with an ablative optical layer that could be written to only once, and were often used in places like libraries that needed to store large amounts of data. Interfaces to connect these to PCs also existed.
Punched cards and...
Date: 2017-02-13 14:44:24
Related topics : library management system using rfid documentation / rfid based library management system documentation / library management system using rfid / rfid based security and access control system
Trunked radio system - Wikipedia
Control channels[ edit ]
In essence, a trunked radio system is a packet switching computer network. Users' radios send data packets to a computer, operating on a dedicated frequency -- called a control channel -- to request communication on a specific talk-group. The controller sends a digital signal to all radios monitoring that talkgroup, instructing the radios to automatically switch to the...
Date: 2017-11-26 04:40:14
Related topics : radio frequency animal tracking system / radio frequency tracking system / radio frequency tracking device
Symbol Technologies - Wikipedia
Symbol Technologies and Telxon, Inc. Most notably, these two companies serviced major retailers such as Wal-Mart , Kroger , Safeway , Federated and others.
Date: 2018-01-11 11:06:23
Related topics : rfid technology mobile phones / zebra technologies rfid / motorola rfid solution / motorola rfid retail solutions
List of electronic toll collection systems - Wikipedia
This is a list of electronic toll collection systems in use on toll roads throughout the world.
This transport-related list is incomplete ; you can help by expanding it .
Contents
South Korea[ edit ]
hi-pass, operated by Korea Expressway Corporation , covers all national express roads and several BTO/BTL roads in South Korea. From 2013, transportation cards(T-money, Cashbee, and Hanpay) are compatible with existing...
Date: 2017-03-04 00:17:39
Related topics : passive rfid tag uses / types of passive rfid tags / passive rfid tag system / passive tag rfid
Pallet - Wikipedia
800 mm � 1,200 mm
31.50 in � 47.24 in
ISO1, same size as EUR
EUR 2
1,200 mm � 1,000 mm
47.24 in � 39.37 in
ISO2
1,000 mm � 1,200 mm
39.37 in � 47.24 in
EUR 6
800 mm � 600 mm
31.50 in � 23.62 in
ISO0, half the size of EUR
600 mm � 400 mm
23.62 in � 15.75 in
quarter the size of...
Date: 2017-03-01 03:36:18
Related topics : supply chain monitoring and control using rfid / companies using rfid in supply chain / supply chain using rfid / manufacturers using rfid / use of rfid in manufacturing
RF Micro Devices - Wikipedia
Early history[ edit ]
The company was founded in 1991 in Greensboro, North Carolina by William J. Pratt, Powell T. Seymour and Jerry D. Neal, all of whom were former employees of Analog Devices . [8] From the beginning, it was focused on designing RFIC products for the commercial wireless market. [8]
In 1992 RFMD licensed GaAs HBT (gallium arsenide heterojunction bipolar transistor) technology...
Date: 2017-02-25 19:47:03
Related topics : rf power amplifier chip / low power rf transceiver chip / single chip rf transceiver / rf chip companies / low cost rf transceiver chip
Animal migration tracking - Wikipedia
Tracking an animal by radio telemetry involves two devices. Telemetry , in general, involves the use of a transmitter that is attached to an animal and sends out a signal in the form of radio waves , just as a radio station does. [1] A scientist might place the transmitter around an animal's ankle , neck , wing , carapace , or dorsal fin . Alternatively, they may surgically implant it as internal...
Date: 2017-03-02 06:11:21
Related topics : passive integrated transponder tags
Short-range devices - Wikipedia
A short-range device (SRD), described by ECC Recommendation 70-03, is a radio-frequency transmitter device used in telecommunication for the transmission of information, which has low capability of causing harmful interference to other radio equipment.
Date: 2017-12-06 18:42:23
Related topics : radio frequency detection device / rfid reader range 1 meter / rfid security applications
Detector (radio) - Wikipedia
Envelope detector[ edit ]
A simple envelope detector
A simple crystal radio with no tuned circuit can be used to listen to strong AM broadcast signals
One major technique is known as envelope detection. The simplest form of envelope detector is the diode detector that consists of a diode connected between the input and output of the circuit, with a resistor and capacitor in parallel from the...
Date: 2017-02-12 03:44:53
Related topics : radio frequency (rf) detection device / radio frequency tracking system / radio frequency tracking device / radio frequency detection device
Faraday cage - Wikipedia
Fe-Si - grain-oriented electrical steel
Fe-Ni - high-permeability permalloy (80%Ni-20%Fe)
Effectiveness of shielding of a static electric field is largely independent of the geometry of the conductive material, however, static magnetic fields can penetrate the shield completely.
In the case of a varying electromagnetic fields, the faster the variations are (i.e., the higher the frequencies), the...
Date: 2017-12-03 01:19:55
Related topics : rfid tags uses
North American railway signaling - Wikipedia
7 External links
History of railroad operating rules[ edit ]
In railroad operations, nearly every aspect of employee behavior is governed by operating rules. Employees who perform their jobs in an unsafe manner usually violate operating and safety rules. Human-factors related incidents are caused, or influenced by, unsafe work behavior and attitudes, as opposed to non-behavior related factors...
Date: 2017-03-01 21:34:23
Related topics : tracking trains via radio frequency systems / radio frequency tracking system
ISO/IEC 14443 - Wikipedia
Standard[ edit ]
The standard was developed by the Working Group 8 of Subcommittee 17 in ISO/IEC Joint Technical Committee 1 .
ISO/IEC 14443-1:2016 Part 1: Physical characteristics [1]
ISO/IEC 14443-2:2016 Part 2: Radio frequency power and signal interface [2]
ISO/IEC...
Date: 2017-02-08 00:07:18
Related topics : types of rfid cards / rfid different types / rfid modulation types
Electromagnetic interference - Wikipedia
Conducted interference[ edit ]
Conducted EMI is caused by the physical contact of the conductors as opposed to radiated EMI which is caused by induction (without physical contact of the conductors).
For lower frequencies, EMI is caused by conduction and, for higher frequencies, by radiation.
EMI through the ground wire is also very common in an electrical facility.
Susceptibilities of different...
Date: 2019-03-30 18:56:07
Related topics : radio frequency (rf) detection device / radio frequency detection device
Radar - Wikipedia
Pulse radar: The round-trip time for the radar pulse to get to the target and return is measured. The distance is proportional to this time.
Continuous wave (CW) radar
One way to obtain a distance measurement is based on the time-of-flight : transmit a short pulse of radio signal (electromagnetic radiation) and measure the time it takes for the reflection to return. The distance is one-half the...
Date: 2017-02-28 21:08:51
Related topics : radio frequency tracking system in your vehicle / radio frequency identification tracking system / radio frequency tracking system
Integrated circuit - Wikipedia
An integrated circuit is defined as: [1]
A circuit in which all or some of the circuit elements are inseparably associated and electrically interconnected so that it is considered to be indivisible for the purposes of construction and commerce.
Circuits meeting this definition can be constructed using many different technologies, including thin-film transistor , thick film technology , or hybrid...
Date: 2017-03-02 03:16:42
Related topics : rf chip design process / advanced trends in rf chip design / single chip rf transceiver / single chip rf
Three-dimensional integrated circuit - Wikipedia
Types[ edit ]
3D ICs vs. 3D packaging[ edit ]
3D Packaging refers to 3D integration schemes that rely on traditional methods of interconnect such as wire bonding and flip chip to achieve vertical stacks. 3D packaging can be disseminated further into 3D system in package (3D SiP) and 3D wafer level package (3D WLP). Stacked memory die interconnected with wire bonds, and package on package (PoP)...
Date: 2017-02-12 06:06:39
Related topics : rf chip design process / rf chip manufacturers / rf chip design
Ferroelectric RAM - Wikipedia
History[ edit ]
Ferroelectric RAM was proposed by MIT graduate student Dudley Allen Buck in his master's thesis, Ferroelectrics for Digital Information Storage and Switching, published in 1952. [4] In 1955 Bell Telephone Laboratories was experimenting with ferroelectric-crystal memories. [5] Development of FeRAM began in the late 1980s. Work was done in 1991 at NASA's Jet Propulsion Laboratory on...
Date: 2017-11-28 04:25:18
Related topics : radio frequency identification tags cost / radio frequency identification tags manufacturers / radio frequency identification tags
Envelope tracking - Wikipedia
Envelope tracking adjusts the voltage applied to an RF power amplifier to deliver the power needed at that instant. Envelope information is derived from the IQ modem and is passed to an envelope tracking power supply to provide the required voltage. [4]
In 2013, Qualcomm became the first company to ship a chip with such technology, which it claimed to be the industry's first for 3G and 4G LTE mobile devices. [5] R2 Semiconductor became the industry's first ET company to ship a phone with ET in the...
Date: 2018-01-01 00:57:57
Related topics : rf power amplifier chip / rf signal tracking device / rf tracking device
The Thing (listening device) - Wikipedia
Creation[ edit ]
The Thing was designed by Soviet Russian inventor Léon Theremin , [2] best-known for his invention of the theremin , an electronic musical instrument.
Installation and use[ edit ]
The device, embedded in a carved wooden plaque of the Great Seal of the United States , was used by the Soviets to spy on the US. On August 4, 1945, several weeks before the end of World War II , a...
Date: 2019-03-30 19:09:38
Related topics : radio frequency (rf) detection device / radio frequency detection device
List of people known for extensive body modification ...
This is a list of individuals known for extensive body modification.
Fakir Musafar , The father of the modern primitive movement, having exposed himself to body piercing, tightlacing, scarification, tattooing and suspension
Pete Burns , had extensive polyacrylamide injections into his lips, along with cheek implants, several nose re-shapings and many tattoos
Julia Gnuse ("The Illustrated...
Date: 2017-11-25 09:46:13
Related topics : rfid implants in humans / rfid tags human implants / rfid human implant
Academic conference - Wikipedia
In addition to presentations, conferences also feature panel discussions , round tables on various issues, poster sessions and workshops. Some conferences take more interactive formats, such as the participant driven " unconference " or various conversational formats. [1]
Some academic conferences include the Artificial Intelligence International Conference, TED , Festival of Marketing, and...
Date: 2019-03-26 08:35:09
Related topics : active rfid tags locator
Tuned radio frequency receiver - Wikipedia
Background[ edit ]
The TRF receiver was patented in 1916 by Ernst Alexanderson . His concept was that each stage would amplify the desired signal while reducing the interfering ones. Multiple stages of RF amplification would make the radio more sensitive to weak stations, and the multiple tuned circuits would give it a narrower bandwidth and more selectivity than the single stage receivers common...
Date: 2018-01-07 23:10:23
Related topics : radio frequency tracking device / rf signal tracking device
Integrated circuit - Wikipedia
An integrated circuit is defined as: [1]
A circuit in which all or some of the circuit elements are inseparably associated and electrically interconnected so that it is considered to be indivisible for the purposes of construction and commerce.
Circuits meeting this definition can be constructed using many different technologies, including thin-film transistors , thick film technologies , or...
Date: 2017-12-09 22:12:43
Related topics : rf chip design process / advanced trends in rf chip design
International Civil Aviation Organization - Wikipedia
Top: ICAO acronym in English, French/Portuguese/Spanish, and Russian.
Bottom: ICAO acronym in Chinese and Arabic
ICAO also standardizes certain functions for use in the airline industry, such as the Aeronautical Message Handling System (AMHS). This makes it a standards organization .
Each country should have an accessible Aeronautical Information Publication (AIP), based on standards defined by...
Date: 2017-03-02 11:16:55
Related topics : rfid chip information technology
National identity card (Sweden) - Wikipedia
6 External links
Price, validity & application procedure[ edit ]
The national identity card is valid for five years and costs 400Â SEK (about 46 EUR ). Applications are filed at police stations which have a passport office. [5] Only around 100,000 Swedes have obtained an official National identity card.[ needs update ] This is because almost all Swedish adults already have another suitable...
Date: 2017-03-02 09:03:05
Related topics : rfid chip card
Domino Printing Sciences - Wikipedia
History[ edit ]
The company was founded by Graeme Minto in 1978 to exploit continuous inkjet technology (CIJ). [2] By 1984 Domino had shipped its 1000th printer. It was first listed on the London Stock Exchange in 1985. In 1989 Domino moved to a new headquarters, located a few miles from Cambridge. [2] Then in 1994 it acquired Directed Energy, a small laser marking business based in California , United States . [2] In 2004 it acquired Wiedenbach, a supplier of ink jet printers, and Purex, a supplier of fume extractors for...
Date: 2017-02-27 18:26:29
Related topics : system rfid software
Wireless - Wikipedia
Wireless communication spans the spectrum from 9 kHz to 300 GHz.[ citation needed ]
Mobile telephones[ edit ]
One of the best-known examples of wireless technology is the mobile phone , also known as a cellular phone, with more than 4.6 billion mobile cellular subscriptions worldwide as of the end of 2010. [8] These wireless phones use radio waves from signal-transmission towers to enable their...
Date: 2017-03-03 05:13:30
Related topics : radio frequency (rf) detection device
Wireless - Wikipedia
Wireless communication spans the spectrum from 9 kHz to 300 GHz.[ citation needed ]
Mobile telephones[ edit ]
One of the best-known examples of wireless technology is the mobile phone , also known as a cellular phone, with more than 4.6 billion mobile cellular subscriptions worldwide as of the end of 2010. [8] These wireless phones use radio waves from signal-transmission towers to enable their...
Date: 2017-03-03 05:11:08
Related topics : radio frequency (rf) detection device
Geolocation - Wikipedia
Geolocation is the identification or estimation of the real-world geographic location of an object, such as a radar source, mobile phone , or Internet -connected computer terminal. In its simplest form geolocation involves the generation of a set of geographic coordinates and is closely related to the use of positioning systems , but its usefulness is enhanced by the use of these coordinates to...
Date: 2017-12-09 06:28:20
Related topics : tracking system using rfid
Frequency - Wikipedia
Units[ edit ]
The SI unit of frequency is the hertz (Hz), named after the German physicist Heinrich Hertz ; one hertz means that an event repeats once per second . A previous name for this unit was cycles per second (cps). The SI unit for period is the second.
A traditional unit of measure used with rotating mechanical devices is revolutions per minute , abbreviated r/min or rpm. 60аrpm equals...
Date: 2017-12-09 15:46:19
Related topics : radio frequency detection device
Swarm robotics - Wikipedia
Definition[ edit ]
The research of swarm robotics is to study the design of robots, their physical body and their controlling behaviours . It is inspired but not limited by [1] the emergent behaviour observed in social insects , called swarm intelligence . Relatively simple individual rules can produce a large set of complex swarm behaviours . A key-component is the communication between the...
Date: 2019-04-04 06:42:13
Related topics : radio frequency tracking system in your vehicle
T-money - Wikipedia
Toll booth operated by Korea Expressway Corporation
Express bus with E-Pass dongle
Some stores and attractions including Seoul's four palaces (except Gyeonghuigung ), Lotte World amusement park, Kyobo Book Centre , GS 25, CU/FamilyMart and other selected convenience stores accept T-money as payment method.
Standard[ edit ]
T-money cards cost 2,500 - 4,000 won and can be purchased and recharged at...
Date: 2017-11-25 08:06:48
Related topics : rf smart card