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The G5RV antenna is a dipole with a symmetric resonant [1] feeder line, which serves as impedance matcher for a 50 Ω coax cable to the transceiver. [ 2 ] [ 3 ] Origin
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SWR is used as a measure of impedance matching of a load to the characteristic impedance of a transmission line carrying radio frequency (RF) signals. This especially applies to transmission lines connecting radio transmitters and receivers with their antennas, as well as similar uses of RF cables such as cable television connections to TV receivers and distribution amplifiers.
SWR (standing wave ratio) is typically 1.5:1 or less over several octaves of frequency. [4] A discone antenna consists of three main parts: the disc , the cone , and the insulator . The disc : The disc should have an overall diameter of 0.7 times a quarter wavelength of the antenna's lowest frequency .
Since the center of both antennas are the same height, there is little difference in performance. Antenna modeling software bears this out for free-space models, predicting maximum gain of 2.15 dBi for the dipole and 1.9 dBi for the inverted vee.
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Often random wire antennas are also (inaccurately) referred to as long-wire antennas.There is no accepted minimum size, but actual long-wire antennas must be greater than at least a quarter-wavelength ( 1 / 4 λ) or perhaps greater than a half ( 1 / 2 λ) at the frequency the long wire antenna is used for, and even a half-wave may only be considered "long-ish" rather than "truly ...
The 2025 Sports Illustrated Swimsuit roster is growing.. On Monday, Nov. 11, the magazine announced that Olympic gymnast Jordan Chiles and pro surfer Caroline Marks would be featured in this year ...
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