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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
In a radio antenna, the feed line (feedline), or feeder, is the cable or other transmission line that connects the antenna with the radio transmitter or receiver. In a transmitting antenna, it feeds the radio frequency (RF) current from the transmitter to the antenna, where the energy in the current is radiated as radio waves .
A Goubau line or Sommerfeld–Goubau line, [1] or G-line for short, is a single-wire transmission line used to conduct radio waves at UHF and microwave frequencies. [2] [3] [4] The dielectric coated transmission line was invented by F. Harms [5] in 1907 and George J. E. Goubau [6] in 1950, based on work on surface waves on wires from 1899 by Arnold Sommerfeld.
Newsom is requiring the California Department of Public Health to provide recommendations by April 1 to limit the harms associated with ultra-processed foods and food ingredients that pose a ...
At that frequency, one whole free-space wavelength is slightly smaller than the perimeter of the loop, which is the smallest that a "large" loop can be. [ 2 ] Self-resonant loop antennas for so-called "short" wave frequencies are relatively large, with a perimeter just greater than the intended wavelength of operation, hence for circular loops ...
An evacuation order has been lifted after a lithium-ion battery fire broke out at a power plant facility in Central California Thursday night, officials said Friday. “In an abundance of caution ...
Double-wire dipole whose characteristic impedance in free space is around 300 Ω. Dipole Although the center impedance at resonance is approximately 73 Ω in free space, in actual use it varies between 30 and 100 Ω, depending on height above ground, so with high-impedance feedline a T-match or Y-match feed will probably be necessary.
California's massive Line Fire continues to burn thousands of acres in San Bernardino County. As of Tuesday morning, the blaze reached 26,426 acres and was 5% contained, according to the ...