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A fractal antenna is an antenna that uses a fractal, self-similar design to maximize the effective length, or increase the perimeter (on inside sections or the outer structure), of material that can receive or transmit electromagnetic radiation within a given total surface area or volume. Such fractal antennas are also referred to as multilevel ...
Radiation resistance is that part of an antenna 's feedpoint electrical resistance caused by the emission of radio waves from the antenna. [ a][ 1][ 2] A radio transmitter applies a radio frequency alternating current to an antenna, which radiates the energy of the current as radio waves. Because the antenna is absorbing the energy it is ...
WZDX. / 34.736889°N 86.533028°W / 34.736889; -86.533028. WZDX (channel 54) is a television station in Huntsville, Alabama, United States, affiliated with Fox and MyNetworkTV. Owned by Tegna Inc., the station maintains studios on North Memorial Parkway ( US 72 / 231 / 431) in Huntsville, and its transmitter is located on Monte Sano ...
A rhombic antenna is made of four sections of wire suspended parallel to the ground in a diamond or "rhombus" shape. Each of the four sides is the same length – about a quarter-wavelength to one wavelength per section – converging but not touching at an angle of about 42° at the fed end and at the far end. The length is not critical ...
BMEWS antennas at Thule, with a modern Satellite Control Network radome on the right. In 1960, the USAF Strategic Air Command (SAC) began Operation Chrome Dome, a Cold War airborne alert program devised by General Thomas S. Power to fly nuclear-armed Boeing B-52 Stratofortress bombers to the borders of the Soviet Union. The flights were ...
In one well-documented case it was impossible to receive GPS signals in the entire harbor of Moss Landing, California due to unintentional jamming caused by malfunctioning TV antenna preamplifiers. [27] [28] Intentional jamming is also possible. Generally, stronger signals can interfere with GPS receivers when they are within radio range or ...
Usually the sweet spot is 13 to 15 inches high. The largest size of the three is the Standard Poodle. These are your classic Poodles that you've seen in movies and TV. Standard Poodles are usually ...
Reflective array antenna. This reflective array television antenna consists of eight "bowtie" dipole driven elements mounted in front of a wire screen reflector. The X-shaped dipoles give it a wide bandwidth to cover both the VHF (174–216 MHz) and UHF (470–700 MHz) bands. It has a gain of 5 dB VHF and 12 dB UHF and an 18 dB front-to-back ratio.