folded dipole antenna
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Antennas : 2M- Squarooka Antenna - squared bazooka for 2 meters band
- Sort of similar to the one of the 6m omni. Instead of using twin-lead, this design makes use of a more or less regular double bazooka antenna (coaxial dipole). Your attention shall be drawn to the available standart literature, such as Rothammel.
In order to "compute" the dimension, Karl Rothammel mentioned that the total length of the dipole shall be 95% of the free-space wavelength. The short-circuit bridges (closing the folded dipole) are to be placed at a distance-fraction being equal to the velocity factor of the coax cable used, which will be 66% using RG-58 or RG174.
[ Hits: 353 | Votes: 0 | Rating: 0 ]
- 40m Linear-Loaded Dipole
- A short dipole wire antenna for 40 meters band. It is a folded dipole that do not make use of coils and can be used either in horizontal or inverted V configuration
[ Hits: 1502 | Votes: 3 | Rating: 8.67 ]
- Slot-Cube Antenna for 6 Meters
- Slot cubes are folded skeleton slot antennas with widened, folded dipoles bent into a cube to reduce size. QST Article 12 2019
[ Hits: 570 | Votes: 2 | Rating: 5.5 ]
- Folded Dipole Calculator
- A simple online folded dipole antenna calculator
[ Hits: 1941 | Votes: 20 | Rating: 5.6 ]
- Folded dipole antennas: terminated vs un-terminated
- As the name suggests, it is simply a dipole with the tips folded towards each other. In this case, a full-wave dipole. The span of a standard folded dipole is aprox 0,5 lambda. In this article the author investigate on differences between un-terminated vs terminated folded dipole antennas.
[ Hits: 493 | Votes: 9 | Rating: 6.78 ]
- Compact fan dipole for 40 30 and 20 meters band
- An homemade fan dipole antenna for 20 30 40 meter bands, setup in a 15 meter wide garden. The longest leg for 40 meter is folded to fit in the 7.5 m
[ Hits: 1134 | Votes: 0 | Rating: 0 ]
- Folded Dipole Antennas
- The folded dipole antenna or folded dipole aerial is widely used, not only on its own, but also as the driven element in other antennas like the Yagi antenna and various other types of antenna. Folded Dipole Myths, Bandwidth and details on folded dipoles
[ Hits: 435 | Votes: 7 | Rating: 3.57 ]
- Open-Folded W8JK Antenna for HF
- Originally designed by John Kraus, W8JK in about 1940, this antenna has some interesting properties.
The W8JK antenna is 2 (Two) centre-fed double-dipole fed by a pair of anti-phase signals. Small size, simple antenna, offer nice performance but need a tuner. Tested in this project from 30m to 6m bands
[ Hits: 139 | Votes: 1 | Rating: 3 ]
- Portable wire antennas
- This document describe serveral wire antennas, from the folded dipole, to the common halfwave monoband antenna for those who want to make HF portable operations in holiday.
[ Hits: 839 | Votes: 2 | Rating: 1 ]
- T2FD Antenna - Terminated and twisted folded dipole
- T2FD is a 600-900 ohms folded dipole, terminated with resistor. Feed impedance is coupled with 50/600 ohms voltage balun. It is a wide band antenna with rather low SWR over the full designed frequency range: antenna tuner is seldom needed.
[ Hits: 482 | Votes: 0 | Rating: 0 ]
- Folded Dipoles in Yagi Uda Antennas
- A folded dipole is an antenna, with two conductors connected on both sides, and folded to form a cylindrical closed shape, to which feed is given at the center.
[ Hits: 303 | Votes: 2 | Rating: 4.5 ]
- The C-Pole Antenna
- C-Poles for 20m and 6m, it is a folded half-wave dipole with an asymmetrical tapped 50-Ohm-point in the lower part of the antenna. Design hints by DK7ZB
[ Hits: 932 | Votes: 47 | Rating: 8.3 ]
- Cobra Antenna - A folded dipole
- A wire dipole antenna for the 80 and 40 meters band obtained by folding elements of a dipole and feeding with a 1:4 balun.
[ Hits: 1052 | Votes: 5 | Rating: 6.8 ]
- Notable Patents on Antenna Design
- Patents of most popular antenna models including
Zeppelin Antenna, Beverage Antenna , Franklin Antenna , Yagi-Uda Antenna , Sterba Antenna , Rhombic Antenna , Turnstile Antenna , Folded Dipole Antenna , Coaxial Antenna , Slot Antenna , Discone Antenna , Quad Antenna Element , Log Periodic Antenna , Swiss Quad Antenna
[ Hits: 285 | Votes: 0 | Rating: 0 ]
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