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1 lis 2013 · In terms of limited space and cost, it's probably easier to set up a horizontal antenna (or an inverted V like a G5RV or OCF) than a vertical simply because it's easier to string a wire through some trees than it is to secure a flagpole or tower against gravity and wind loads.
24 mar 2021 · At the lower end of the HF spectrum, the λ/2 height requirement for horizontal antennas can become cumbersome (even though horizontal phased arrays have a less stringent minimum height requirement). A vertical HF antenna can get away with a height of only λ/4.
24 wrz 2020 · All of the vertical antenna falls below the dipole’s peak height of ~5 meters with the highest current section being closest to the ground, whereas the entire length of the dipole is ~5 metres high.
The comparison was between a full size 20 M 1/4 wave vertical over 103 Half wave long radials and a fullsize 20 M Folded Dipole mounted vertically, with the 450 ohm feed line coming off perpendicular to the antenna for about 60 ft.
The performance of horizontally polarized antennas at heights of 35, 70 and 120 feet is examined in detail. Vertically polarized arrays are not considered here because at short-wave frequencies, over average terrain and at low radiation angles, they are usually less effective than horizontal antennas. Ionospheric Propagation
HF vertical antennas are ideal for omnidirectional coverage and DX communication, while HF dipole antennas offer efficiency. HF magnetic loop antennas provide a compact solution with low noise and somewhat directional capabilities.
24 wrz 2020 · VHF/UHF propagation is line of sight, and traditionally vertical antennas have been the choice for portable or mobile—whether it’s simplex or via a repeater. On the downside, verticals have a reputation for picking up more noise than a horizontal antenna in AM/CW/SSB modes.
