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2. Aperture (antenna) - Wikipedia

   en.wikipedia.org/wiki/Aperture_(antenna)

   In electromagnetics and antenna theory, the aperture of an antenna is defined as "A surface, near or on an antenna, on which it is convenient to make assumptions regarding the field values for the purpose of computing fields at external points.

3. Channel Master - Wikipedia

   en.wikipedia.org/wiki/Channel_Master

   Channel Master's original product was a prefabricated television aerial with hinged elements which would unfold and snap into place; this patented design greatly reduced installation time as existing antenna designs at the time had to be bolted together from multiple pieces by rooftop installers. [17]

4. Gain (antenna) - Wikipedia

   en.wikipedia.org/wiki/Gain_(antenna)

   is the radiation pattern of a directive antenna, which radiates a maximum power density of watts per square meter at some given distance from the antenna. The green ball R iso {\displaystyle R_{\text{iso}}} is the radiation pattern of an isotropic antenna which radiates the same total power, and S iso {\displaystyle S_{\text{iso}}} is the power ...

5. Antenna TV - Wikipedia

   en.wikipedia.org/wiki/Antenna_TV

   Original logo, used from January 1 to August 29, 2011. Tribune Broadcasting announced the formation of Antenna TV on August 30, 2010, with television stations owned by Tribune and Local TV LLC (an Oak Hill Capital Partners-controlled holding company that Tribune had been co-managing since 2008, in an agreement that remained in place until Tribune completed its outright acquisition of the group ...

6. Log-periodic antenna - Wikipedia

   en.wikipedia.org/wiki/Log-periodic_antenna

   Instead of the elements being driven in parallel, attached to a central transmission line, the elements are driven in series, adjacent elements connected at the outer edges. The antenna shown here would have about 14 dBi gain. An antenna array consisting of two such antennas, one above the other and driven in phase has a gain of up to 17 dBi.

7. Active antenna - Wikipedia

   en.wikipedia.org/wiki/Active_antenna

   Active antenna designs allow antennas of limited size to have a wider frequency range than passive antennas, and are primarily used in situations where a larger passive antenna is either impractical, such as inside a portable radio or on a vehicle, or impossible, such as in a suburban residential area with restrictions on large outdoor antennas.