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Antennas - Parameters, Models & Applications (Hardcover)
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Antennas - Parameters, Models & Applications (Hardcover)
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An antenna is a transducer designed to transmit or receive
electromagnetic waves. In other words, antennas convert
electromagnetic waves into electrical currents and vice versa.
Antennas are used in systems such as radio and television
broadcasting, point-to-point radio communication, wireless LAN,
radar, and space exploration. Antennas usually work in air or outer
space, but can also be operated under water or even through soil
and rock at certain frequencies for short distances. Physically, an
antenna is an arrangement of conductors that generate a radiating
electromagnetic field in response to an applied alternating voltage
and the associated alternating electric current, or can be placed
in an electromagnetic field so that the field will induce an
alternating current in the antenna and a voltage between its
terminals. Some antenna devices (parabolic antenna, Horn Antenna)
just adapt the free space to another type of antenna.
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