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A coaxial antenna (often known as a coaxial dipole) is a particular form of a half-wave dipole antenna, most often employed as a vertically polarized omnidirectional antenna.
28 paź 2024 · The article discusses the evolution of amateur radio equipment, emphasizing the importance of antennas and the essential role of the RigExpert "AA-55 Zoom" antenna analyzer. ... wrap a thick teflon tape around the main coax near the antenna terminals since the quarter-wave coaxial braid stub is at the high voltage potential at that point. Good ...
7 sie 2024 · If an antenna has a perfect match at the feed point, a half wavelength in coax will repeat that match but with velocity factors running between about .66 and .85 for most modern coax, a half wavelength in coax would be between 11.88 and 15.3 feet, not 18 feet.
Most CB and HAM radio operators use coaxial (coax) cable to feed their antenna. Another name for the cable you use to hook your radio to your antenna is “feed line”. Feed line is a generic term for all types of cable including coaxu0006.
17 lut 2010 · Amateur Radio (G3TXQ) - Coaxial Antennas. From time to time I see suggestions that wire antennas can be constructed using coaxial cable for their elements as a way of reducing their size by exploiting the Velocity Factor of the cable.
5 lut 2017 · A length of coaxial cable radiates negligible amount of RF. Same length, if cut into pieces of length (λ/2 * VF), and these pieces joined again cross-connected (i.e. core of a piece to shield of adjacent piece & vice versa), then this length of coax becomes a very good radiator of RF. Why & how? EDIT on Feb 05, 2017:
28 sty 2015 · RG-59 and RG-6 are 75 Ohm coaxial cables designed for cable television applications, they tend to have wide frequency response and low line loss. They also have an impedance of 75 ohms, which is a standard for coax cable used in the broadcast industry.
