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Topic: Antenna (radio)


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In the News (Sat 15 Jun 19)

  
 Antenna (radio) @ LaunchBase.com (Launch Base)   (Site not responding. Last check: 2007-10-31)
Antennas were used for the first time, in 1889, by Heinrich Hertz (1857-1894) to prove the existence of electromagnetic waves predicted by the theory of James Clerk Maxwell.
The "polarization" of an antenna is the orientation of the electric field (E-plane) of the radio wave with respect to the Earth's surface and is determined by the physical structure of the antenna and by its orientation.
For radio antennas, polarization corresponds to the orientation of the radiating element in an antenna.
www.launchbase.com /encyclopedia/Antenna_(radio)   (7364 words)

  
 Howstuffworks "How does a CB radio antenna work?"
A citizens band (CB) radio antenna is a device designed to do two things: It captures radio-frequency signals that are then converted to electrical signals by the receiver, and it takes electrical signals from the transmitter and converts them into radio-frequency signals.
This is done by measuring the Standing Wave Ratio (SWR) of the antenna and cable between the antenna and tuning the antenna until the SWR is acceptable.
In an ideal situation, the impedances of line and antenna match perfectly, and 100 percent of the electrical energy sent to the antenna is converted to radio energy and radiated into the atmosphere.
electronics.howstuffworks.com /question490.htm   (723 words)

  
 Reference.com/Encyclopedia/Antenna (radio)
A "loaded antenna" is an active antenna having an elongated portion of appreciable electrical length and having additional inductance or capacity directly in series or shunt with the elongated portion so as to modify the standing wave pattern existing along the portion or to change the effective electrical length of the portion.
Antennas, more specifically, are passive conducting masses, which may be in the form of a metallic current conductor, waveguide, or space discharge.
To act as an antenna, the mass usually has a particular shape and size, or may have electrical circuit elements, namely resistance, inductance, or capacitance, associated with it.
www.reference.com /browse/wiki/Radio_antenna   (5852 words)

  
 underground radio aerial antenna reception interception from The Encyclopedia of free energy,energy21.org,energy 21 org ...
Some very surprising results were obtained in receiving with a spiral Antenna lowered into d dry well.
tall radio masts bringing their hobby to a stand still for the duration of the war.
However one amateur by the name of James Harris Rogers tried something different and buried his receiving and transmitting antennas in the ground.
www.icestuff.com /~energy21/roger.htm   (812 words)

  
 cb radio antenna reviews
You can find many items for you cb radio here Things from radios roger beeps noise toys sound effects antennas.
There is even a free message board so you can buy sell or swap things.Radio Shack whip antenna inchs long product reviews by real people like you.
CB Radio Antenna questions User Name Best Cb Antenna.
antenna.digital-recreation.com /cb-radio-antenna-reviews   (378 words)

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