Wireless Networks: How Do They Work? by Ron King
Wireless networks use radio waves instead of wires to transmit data between computers. Here's how: The Binary Code: 1s and 0s It's well known that computers transmit information digitally, using binary code: ones and zeros. This translates well to radio waves, since those 1s and 0s can be... More importantly for this example, though, it is a binary system, just as a computer system is. ... This makes wireless networks more immune to interference from other radio signals than if they transmitted on a single frequency.

Radio Headsets by Josh Riverside
Headsets, also known as headphones, are hearing devices that are actually miniature speaker systems. They are stereo hearing systems that can be worn near the ear, thus providing mobility to the user. Traditional headsets were bulky and large with two speakers for both the ears encased in padded... Other options are the accessibility of the controls like volume and frequency. ... Sound quality, speaker power, bass and treble range are some features to look for in a radio headset. ... Some radio headphones use rechargeable batteries.

Radio Frequency Identification (RFID) by Jith Crs
The term Radio Frequency Identification is used for automatically identifies an object that transmits the identification (in the form of a unique serial number) of an object wirelessly, using radio waves. Radio Frequency IDentification abbreviated, as RFID is a Dedicated Short Range... An RFID system consists of an antenna and a transceiver, which read the radio frequency and transfer the information to a processing device (reader) and a transponder, or RF tag, which contains the RF circuitry and information to be transmitted.

Radio Frequency Identification Basics by James Hunt
Radio Frequency Identification or RFID is the use of radio waves to identify objects. This means, unlike a barcode, one can track an item without actually having to come in contact with it. The way it works is that an identifying serial number is stored in a microchip which is then attached to... Radio Frequency Identification isn’t new. ... Businesses that use this system will be able to track products throughout the whole manufacturing process, from the beginning of the conveyor belt to the packaging and beyond.

Bluetooth Makes The Wires Disappear by Khieng Chho
While relatively new to the ears of common consumers, Bluetooth technology has been around for several years and number of products that support this application grows year after year. Various technology-oriented companies advertise Bluetooth-enabled PDAs, laptops and mobile phones. ... Made to operate in noisy frequency places, the Bluetooth radio utilizes a fast acknowledgement and frequency hopping application to make a seamless connection. ... Bluetooth radio hops at a faster pace compared to other systems operating in the similar frequency level, as it uses shorter packets.

A Brief Introduction To Bluetooth by Oliver Dvorak
Bluetooth was designed to allow low bandwidth wireless connections to become easy to use so even those who are new to wireless can use them. Version one.One of Bluetooth describes a low power, short range wireless networking technology that uses radio waves to send data at rates up to 720... Also known for its worldwide operation, Bluetooth radio operates in the 2.four GHz frequency band, which is license free and reachable to any type of radio system in the world. ... The size of the Bluetooth radio is remarkable, as a Bluetooth radio can be built into 1 or two very small microchips then...

RFID for Beginners by Amie Kandowski
RFID technology is used frequently today and has been around since the 1920s, but not many people know about, or understand it. RFID stands for Radio Frequency Identification and is used to store and retrieve information. This information is stored and retrieved using RFID tags or transponders. ... The tags have antennas that allow them to receive and respond to radio-frequency queries from an RFID transceiver. ... Passive tags do not have their own power supply, but rather receive their power from a tiny electrical current present in the antenna that is induced by an incoming radio...

CDMA (Code Division Multiple Access) Technology by Praise Paul
The world is demanding more from wireless communication technologies than ever before. More People around the world are subscribing to wireless services and consumers are using their phones more frequently. Add on features of Third-Generation (3G) wireless data services and applications - such... It could be compared to AM or FM broadcasting radio where each station has a frequency assigned. ... FDMA : In Frequency Division Multiple Access, the frequency band is divided in slots. ... TDMA : In Time Division Multiple Access, the frequency band is not partitioned but users are allowed to use...

Infrared And Bluetooth: Connecting Things Easier by Robert Thatcher
With different electrical devices produced everyday, the problem of connecting things is becoming more and more complex. The system that comprises the computers and other electronic devices makes use of varieties of connecting wires, cables and the likes. ... The design of the technology was such that it has created a new system that does not interfere with the other devices that make use of the same frequency band (e.g. ... Bluetooth technology works by transmitting signals via low frequency radio signals.

Atomic Clock Systems by David Evans
An atomic clock provides an extremely accurate source of time. There are various types of atomic clock, mostly found in laboratories: Caesium Clocks; Hydrogen Clocks; and Rubidium Clocks. Most commercially available atomic clock time synchronisation systems utilise a radio or GPS time signal... Radio Atomic Clock Time References Radio time transmissions such as the MSF-60 (UK), DCF-77 (Germany) and WWVB (US) time signals broadcast highly accurate time information from a radio transmitter. ... GPS Atomic Clock Time Reference The Global Positioning System (GPS) is a US military system for...