electromagnetic communication
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Electromagnetic radiation and health — Electromagnetic radiation can be classified into ionizing radiation and non ionizing radiation, based on whether it is capable of ionizing atoms and breaking chemical bonds. Ultraviolet and higher frequencies, such as X rays or gamma rays are… … Wikipedia
Communication with submarines — is difficult because radio waves do not travel well through thick electrical conductors like salt water. The obvious solution is to surface and raise an antenna above the water, then use ordinary radio transmissions. Early submarines had to… … Wikipedia
electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… … Universalium
communication — communicational, adj. /keuh myooh ni kay sheuhn/, n. 1. the act or process of communicating; fact of being communicated. 2. the imparting or interchange of thoughts, opinions, or information by speech, writing, or signs. 3. something imparted,… … Universalium
communication engineering — noun : engineering concerned with the sending and receiving of signals especially by means of electrical or electroacoustic devices and electromagnetic waves … Useful english dictionary
spread spectrum communication — noun A form of electromagnetic communication in which the signal frequency or bandwidth is spread beyond that required, rendering it more difficult to intercept or jam, or to send multiple signals over the same band … Wiktionary
Power line communication — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… … Wikipedia
Fiber-optic communication — An optical fiber junction box. The yellow cables are single mode fibers; the orange and blue cables are multi mode fibers: 50/125 µm OM2 and 50/125 µm OM3 fibers respectively. Fiber optic communication is a method of transmitting information from … Wikipedia
Radio communication system — A radio communication system send signals by radio. [cite book | title = Wireless Network Performance Handbook | author = Clint Smith, Curt Gervelis | year = 2003 | publisher = McGraw Hill Professional | isbn = 0071406557 | url =… … Wikipedia
Interstellar communication — is the transmission of signals between planetary systems. Interstellar communication is potentially much easier than interstellar travel, being possible with technologies and equipment which are currently available. However, successful… … Wikipedia
Medical Implant Communication Service — (MICS) is the name of a specification for using a frequency band between 401 and 406 MHz in communication with medical implants. It allows bi directional radio communication with a pacemaker or other electronic implants. The maximum transmit … Wikipedia
