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The receiving antenna height of 10m dates from the 1950s when receivers were relatively insensitive and used rooftop antennas. Although this may seem unrealistic for typical situations today, when combined with the above threshold it is considered a good proxy for providing coverage to more sensitive modern receivers used without external ...
It is now classified as a C1 station, which allows a maximum power of 100,000 watts and a maximum antenna height of 1,000 feet. [ 8 ] KFJB is one of the few radio stations in the U.S. to have the same call letters for its entire history, dating back to the early days of broadcasting.
A better solution is to replace the radio and antenna with ones designed for the country where the car will be used. Australia had a similar situation with Australian TV channels 3, 4 and 5 that are between 88 and 108 MHz, and was intending to follow Japan, but in the end opted for the western bandplan, due to CCIR radios that entered the ...
Height above average terrain (HAAT), or (less popularly) effective height above average terrain (EHAAT), is the vertical position of an antenna site above the surrounding landscape. HAAT is used extensively in FM radio and television , as it is more important than effective radiated power (ERP) in determining the range of broadcasts ( VHF and ...
The antenna can have a smaller or larger number of rod elements; in general, the more elements, the higher the gain and the more directional. Another design used mainly for UHF reception is the reflective array antenna, consisting of a vertical metal screen with multiple dipole elements mounted in front of it.
In telecommunications, the effective height of an antenna is the height of the antenna's center of radiation above the ground. In low-frequency applications involving loaded or nonloaded vertical antennas, the effective height is the moment of the current distribution in the vertical section, divided by the input current. For an antenna with a ...
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This modern DTV antenna uses a Yagi for UHF reception placed in front of a log-periodic for VHF-high. Although the UHF band has five times as many channels as VHF, the antenna needed to receive them is much smaller in both length and width. An older design that also received VHF-low would have many more elements extending to the right.