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| | ANTENNA (RADIO) FACTS AND INFORMATION (Site not responding. Last check: 2007-11-06) |
 | | Antennas have practical use for the transmission and reception of radio_frequency signals (radio, TV, etc.), which can travel over great distances at the speed_of_light, and pass through nonconducting walls (although often there is a variable signal reduction depending on the type of wall, and natural rock can be very defective to radio signals). |
 | | The bandwidth of an antenna may be increased by several techniques, including using thicker wires, replacing wires with ''cages'' to simulate a thicker wire, tapering antenna components (like in a feed_horn), and combining multiple antennas into a single assembly and allowing the natural impedance to select the correct antenna. |
 | | Antennas used for transmission have a maximum_power_rating, beyond which heating, arcing or sparking may occur in the components, which may cause them to be damaged or destroyed. |
| www.witwik.com /antenna_(radio) (2819 words) |
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