Chat » Websites have

Radio-Frequency Identification refers to the use of radio waves to read Daniel Giddens Jersey , capture, and interact with information saved on a tag. Tags are generally attached to objects, and can be read from several feet away. In addition, the tag doesn鈥檛 always have to be in the direct line-of-sight to initiate interaction.

An RFID tag is a wonderful and effective way to assign a unique identity to an object. Moreover, they do not need an internal power source Collin Sexton Jersey , while a tag can be as small as a grain of black pepper. Meaning they are easily embedded almost anywhere 鈥?hence their popularity.


A basic RFID security access control system is made up of two parts: the tag, and the reader.


Tag


The RFID tag has an embedded transmitter and receiver. The actual RFID component contained in a tag has two parts: an integrated circuit for storing and processing information, and an antenna to receive and transmit a signal. The RFID tag has non-volatile memory storage, and can include either fixed or programmable logic for processing transmission and sensor data.


Tags can be passive, active Braxton Key Jersey , or battery-assistive passive.
A passive tag is the cheapest option, and features no battery. The tag uses radio energy transmitted by the reader.


An active tag features an onboard battery, periodically transmitting its credentials.


A battery-assistive passive tag also features a small onboard battery, but is only activated when in the presence of an RFID reader.


In addition, a tag may be either read-only Avery Johnson Jr. Jersey , or readwrite. A read-only tag has a factory assigned serial number used for identification in a database, while a readwrite tag can have specific custom data written to the tag by the user.


Reader


The RFID reader has a two-way radio transmitted-receiver (transceiver), sometimes referred to as an interrogator. The transceiver transmits an encoded radio signal to interrogate the tag. The radio signal essentially wakes or activates the tag. In turn, the tag transponder converts the radio signal into usable power, and responds to the reader.


Types of RFID Security Access Control System


We generally classify the type of RFID system by the type of tag and reader. There are three common combinations:


Passive Reader Active Tag (PRAT): The reader is passive Ar'Mond Davis Jersey , only receiving radio signals from an active tag. Because the tag is battery powered, the transmitreception range can be from 0-2,000 feet (0-600m). As such, PRAT is a flexible RFID solution.


Active Reader Passive Tag (ARPT): The reader is active, transmitting an interrogator radio signal Alex Reese Jersey , receiving authentication signal replies from passive tags.


Active Reader Active Tag (ARAT): The reader is active, and interacts with active or battery-assistive passive tags.


The amount of information stored on an RFID tag varies. For instance, a passive tag may only store up to 1024 bytes of information 鈥?that鈥檚 just one kilobyte (KB). Laughable in terms of modern storage capacity, but enough to store a full name, identification number Alabama Crimson Tide Jersey , birthday, SSN, credit card information, and so much more. The aerospace industry, however Cheap College Football Jerseys , use passive ultra-high frequency RFID tags with 8KB storage to track part history over time. These could store a massive amount of personal data on.


Today, there are various areas where RFID Security Access Control System is being deployed.

More About the Author

camera & security system companies in Dubai, UAE? vantage security is leading supplier & manufactures of CP Plus CCTV Camera, security camera, security system in Abu Dhabi and UAE. For more details contact us :

Total Views: 98Word Count: 517See All articles From Author
Best Web Development Company for Your Website

Posted On : Dec-09-2011 | seen (118) times | Article Word Count : 508 |

Web design services providing adequate provisions has always been key strength of the companies. Companies have to equally focus in the areas of Web Design Cheap College Basketball Jerseys , Web Promotion, and Software Development. A typical Web development Company provides you a wide variety of web services. Many web design services are present in the global market. It gives the wide variety of services at low cost with efficient programming and design .The company making the websites for the internet also avails services like web design, scripting, e-commerce development, web content development.


Websites have huge amount of information .In these companies many people and programmers works and based on the resources the cost of web design services vary in a vast dimension. These companies obviously are of great help in the online business. At present the online commerce are making huge quantity of money and giving countless job opportunities.

Web design services providing adequate provisions has always been key strength of the companies. Companies have to equally focus in the areas of Web Design Cheap College Jerseys , Web Promotion, and Software. Cheap Jerseys Cheap Jerseys Free Shipping Cheap Jerseys Online Wholesale Jerseys Cheap Jerseys From China Cheap Jerseys Free Shipping Wholesale NFL Jerseys China Wholesale NFL Jerseys China Cheap NFL Jerseys Free Shipping Cheap Jerseys Wholesale