Telecommunication is the extension of communication over a distance. In practice it also recognizes that something may be lost in the process; hence the term 'telecommunication' covers all forms of distance and/or conversion of the original communications, including radio, telegraphy, television, telephony, data communication and computer networking.

The elements of a telecommunication system are a transmitter, a medium and possibly a channel imposed upon the medium  and a receiver. The transmitter is a device that transforms or encodes the message into a physical phenomenon; the signal. The transmission medium, by its physical nature, is likely to modify or degrade the signal on its path from the transmitter to the receiver. 

The receiver has a decoding mechanism capable of recovering the message within certain limits of signal degradation. In some cases, the final "receiver" is the human eye and/or ear and the recovery of the message is done by the brain.

Most simply, an antenna is an electronic component designed to send or receive radio waves.
More specifically, an antenna is an arrangement of conductors designed to radiate (transmit) an electromagnetic field in response to an applied alternating electromotive force (EMF) and the associated alternating electric current.

antenna_02.jpg (111978 Byte) antenna_04.jpg (124431 Byte) antenna-lugano.jpg (304484 Byte) antenna-y6z2q.jpg (105220 Byte) satellite antena
antennas-01ya.jpg (89542 Byte) antennas-5rt3.jpg (84645 Byte) antenna photo high-antenna-dxs4.jpg (67284 Byte)
mobile-phone-antenna-7u6.jpg (118177 Byte) antenna-7o3x.jpg (126176 Byte) photo antenna telecomm-4fjs.jpg (100167 Byte) gsm-antenna-ol6.jpg (90498 Byte)
antennas-8pe1.jpg (134015 Byte) picture antenna antennas-7bd9.jpg (105628 Byte) antenna-z5e.JPG (72681 Byte) antenna-np1q.jpg (56116 Byte)
antenna-5xts.jpg (72488 Byte) antenna-dksh.jpg (138487 Byte) antena foto antennas-7qo.jpg (129005 Byte) communication antennas_01.jpg (104403 Byte)
antenna-i5k1.jpg (103194 Byte) aerial mast antenna-g9e3.jpg (155348 Byte) antenna-u39w.jpg (100830 Byte) mast aca-telecom-v4e.jpg (129272 Byte)
telecommunication-1g2a.jpg (95931 Byte) com1-hjft.jpg (158034 Byte) itl-comm-0188.jpg (106455 Byte) cajun-p333r.jpg (164394 Byte) cables
telecommunication-2a83.jpg (122632 Byte) communication-2a3v.jpg (180802 Byte) telecommunication-mldi.jpg (122152 Byte) computer tele-kommunikation-u5de.jpg (101841 Byte) computer
tv-antenna-z4ne.jpg (65173 Byte) antennas-kc7n.jpg (94922 Byte) communication antennas-y3x4w.jpg (116189 Byte) image tv antennas rigi-2vu3.jpg (69837 Byte) radio mast
antenna-cy4l.jpg (100348 Byte) antenna-7wt1.jpg (138659 Byte)   antennas-6vds.jpg (95604 Byte)
antenna-zur9.jpg (107905 Byte) communication Antenna, House, Windows
communication telecom