Vertical antennas
163 links - and 5 categories
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Antennas : 160M- Experiments with 160m antennas
- Experimentin wire antennas on top band using several type of aerials.
This includes a 40 to 160 meters EndFed Half Wave kite antennas and 160m/80m loaded vertical antenna.
[ Hits: 177 | Votes: 0 | Rating: 0 ]
- 160m Short Vertical Loft Antenna
- This is a very small vertical 160m antenna that fits in the loft of even my small house. It was built as a way of getting a signal out on 160m for local AM contacts, but the local noise level was far too high to allow it to be used at night for this purpose. However, on WSPR it did a pretty good job with WSPR spots from a very long way across Europe being received when running 2.5W out.
[ Hits: 208 | Votes: 1 | Rating: 7 ]
- 160m 80m Vertical Antenna
- A dual band vertical antenna for 160 and 80 meters band, on a 18m spiderbeam fiberglass pole. This vertical is a good compromise when you want good performance on these two low ham bands and don't have the space to install two seperate antennas.
[ Hits: 186 | Votes: 0 | Rating: 0 ]
- 20 meter short loaded vertical antennas
- Loading is a way to lower the resonant frequency of an antenna radiator. This technique is typically used in antennas that have radiating elements that are too short for the desired resonance frequency. In this excellent article the author experiment loaded vertical dipoles for 20 meters band
[ Hits: 232 | Votes: 1 | Rating: 9 ]
- Six Meter Antennas Reviewed
- In this article the author describes his personal experience on some antennas for 50 MHz he tested on the field, the six meter Dipole, Vertical, Moxon, a 3 element Yagi and an Omniangle antenna.
[ Hits: 138 | Votes: 0 | Rating: 0 ]
- Cross-Yagi 10el Antenna for 70cm
- 10 Elements Cross-Yagi Antenna for 433 MHz. The base of the 10el antenna is the recalculated RA6FOO antenna.Circular polarization is realized - by a phasing quarter-wave line, matching of horizontal and vertical polarization antennas
[ Hits: 176 | Votes: 6 | Rating: 8.83 ]
- 80m Inverted-L 12m Spiderpole
- An Inverted-L with its long leg sloping to the ground. It will still work very good, even if the horizontal wire has to be sloped diagonally to the ground, as long as you have enough horizontal space to keep it at about a 45 degree angle or more from the pole.
[ Hits: 150 | Votes: 0 | Rating: 0 ]
- 80m Vertical
- This is a FULL SIZE quarter-wavelength vertical made on a 18m Spiderbeam fiberglass telescoping Spiderpole
[ Hits: 139 | Votes: 0 | Rating: 0 ]
- Portable Base Matching Unit for 42 to 48 Foot Verticals
- Medium power BMU (Base Matching Unit) intended for 42 foot to 48 foot vertical, sloper, or Inverted-L antennas.
[ Hits: 83 | Votes: 1 | Rating: 1 ]
- Loading of Short Antennas
- An interesting article on loading short vertical monopole antennas, representing six different methods. Base loading, Center Loading, Top Loading, Continuous loading, half and half loading and capacitive top loading.
[ Hits: 682 | Votes: 4 | Rating: 6.25 ]
- How to Tune Dipole Antennas
- This is a standard calculation method that can help you while tuning dipole antennas, by adjusting wire lengths. This method can be used also when you need to add lenght to your wires, and can be additionally used to quarter waves vertical antennas
[ Hits: 336 | Votes: 5 | Rating: 8.6 ]
- Multiband portable wire antennas
- Vertical end fed antenna used for portable operations. The antenna will work on 80 with acceptable results, it will work fine on 40m, and it will be a good deal better than a normal 1/4 wave GP on 20, 17, 15 meters.
[ Hits: 187 | Votes: 0 | Rating: 0 ]
- Improving Gain of the Super J-Pole Antenna
- The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.
[ Hits: 192 | Votes: 0 | Rating: 0 ]
- Angle of OCF L-Dipole Antennas
- This page is a discussion about impedance matching by Off Center Fed dipoles in the Wide L-form. When a vertical or horizontal dipole is bent into a 90 degree L-form, the impedance drops about half.
[ Hits: 76 | Votes: 0 | Rating: 0 ]
- Build this Vertical Portable HF Antenna
- An experimental prototype of an asymmetrical hatted vertical dipole antenna that can work on HF bands 20 to 10 meters band. The AHVD Vertical dipole is an upside-down T design
[ Hits: 374 | Votes: 3 | Rating: 9.67 ]
- Improve your Antennas for Low Solar Activity
- How to improve your transmitting antennas for very low solar activity periods, vertically polarized 160 meter antennas, horizontally polarized 80 to 10 meter antennas, single or stacked yagis, multi-tower stations
[ Hits: 422 | Votes: 0 | Rating: 0 ]
- Understanding Antenna Polarization
- What is antenna polarization, and why does it matter. Horizontal versus Vertical versus Circular polarization. Undestanding how antennas perform better with different polarizations.
[ Hits: 169 | Votes: 1 | Rating: 2 ]
- Groundplane Antennas at Various Heights
- Mounting on roof at the right ground level can greately impact on antenna performances because will affect the radiated angle of energy.
[ Hits: 178 | Votes: 3 | Rating: 6 ]
- Variations on a Dipole
- Antenna patterns are all about interference. Presentation on wire antennas for HF bands. Dipoles, horizontal and vertical dipoles, effects of ground on radiation patterns, multi-band wires antennas. Knowing what you should expect from the radiation patterns for waves on your wires will help you choose what will work best for your needs. The principles of interference can lend insight into what to expect from a wire antenna.
[ Hits: 98 | Votes: 0 | Rating: 0 ]
- 80m-40m Dual-Band Vertical
- A dual band 40-80 vertical antenna on an 18m Spiderbeam Fiberglass Spiderpole, with monoband performance
[ Hits: 160 | Votes: 2 | Rating: 10 ]
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