antenna formula

18 links

10 Meter 4 Element Quad Antenna - Dimension and formula for a 4 element QUAD antenna for the 10 meters band
[ Hits: 4614 | Votes: 13 | Rating: 5.23 ]

Inverted L- Antenna for the TOP Band - An schema drawing and formula to calculate size of an Inverted L antenna for the 160 meters band, 1.84 MHz.
[ Hits: 699 | Votes: 8 | Rating: 6 ]

Speaker Wire Delta Loop Antenna for 20M - The antenna I built was inspired by a portable delta loop designed by Doug DeMaw, W1FB. Given that I constrained myself to a 50-foot roll of speak wire, I scaled my antenna for the 20M band. Using the formula, 1005 divided by the frequency in megahertz, I calculated a total length of 71 feet (21.6 meters) for the center of the 20M band.
[ Hits: 127 | Votes: 0 | Rating: 0 ]

Vertical bazooka antenna for the 40m - A quarter wave vertical omni-directional antenna for 7 MHz. Formulas for dimensions in feet and meters are provided. Ideal radial angle is between 35° and 45°. Velocity factor (Vf) varies based on coax type.
[ Hits: 135 | Votes: 7 | Rating: 6.85 ]

3 element Yagi Antenna On-line Caluclator - This article includes an online calculator for a 3 element Yagi Antenna. The formula and basics theory of Yagi Antenna are also explained with examples.
[ Hits: 839 | Votes: 19 | Rating: 4.59 ]
Loaded Quarter Wave Antenna Inductance Calculator - Here is a formula and calculator for creating a loaded (shortened) quarter wave vertical or balanced dipole. The calculation refers to either a loaded 1/4 wave or a loaded dipole
[ Hits: 163 | Votes: 0 | Rating: 0 ]

Antenne double-bazooka - A page in french dedicated to the double bazooka antenna, with a short history of this antenna model and main characteristics including a comparison versus the dipole antenna and formulas to determine elements size.
[ Hits: 1080 | Votes: 12 | Rating: 5.58 ]

Antenna Cable Loss and SWR - Calculate Cable Loss from SWR and reverse. Text file with only two simply formulas
[ Hits: 2191 | Votes: 4 | Rating: 4 ]
Actual Antenna SWR - Easy for calculate formula which could be a wake-up call for you. The SWR value at the input of antenna cable is not a actual SWR of your favorite antenna.
[ Hits: 4181 | Votes: 5 | Rating: 4.8 ]

G5RV Formula - G5RV Formula, a simple multiband antenna, by Rick, KC8AON
[ Hits: 7218 | Votes: 12 | Rating: 5.34 ]

Wire Antenna Design Lengths - The Classic Numbers for All Types of Wire Antennas at HF. Wire antennas need to be made a bit long and cut to resonance. They are affected by height above the ground and surrounding objects. In order to get an idea of the right place to start, certain formulas are generally accepted.
[ Hits: 330 | Votes: 1 | Rating: 7 ]

Homebrew an OCF Off-Center Fed Dipole Antenna - This type of antenna is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. It’s a dipole fed off center with a 4:1 balun at the offset feed point. The antenna shown covers 80, 40, 20 and 10 meters. The formula can also be used to adjust the overall length to cover more or fewer bands and the resulting overall length. 160-10m, 80-10m or 40-10 meters depending on your available space. Other bands will require a tuner.
[ Hits: 198 | Votes: 3 | Rating: 6.67 ]

Cubical Quad Antenna Design ^pop - By N6VNG, can be used to determine the element lengths and the gamma match values for different frequencies, includes link to excel files with formulas to dimension your quad antenna.
[ Hits: 30805 | Votes: 88 | Rating: 5.74 ]

UHF Yagi for AO-40 - Based on DL6UW Yagi antenna's design-formula The forward gain is 13.6 dBi (about 11.5 dBd) and it's pretty small, about 1,5 m in length
[ Hits: 2468 | Votes: 4 | Rating: 6.75 ]

How does antenna height affect VHF communications - How to calculate range for a VHF antenna with a simple formula and how to increase VHF coverage.
[ Hits: 634 | Votes: 2 | Rating: 9 ]
Designing Vertical Aerials - If you want to design vertical antennas you can find all theory and formulas used to model a vertical aerial calculating capacitance, reactance, building the inductor and calculating resistances. Includes an excel spreadsheet to calculate efficiency.
[ Hits: 576 | Votes: 0 | Rating: 0 ]

Build your own Windom Antenna - Building a Windom HF Antenna. A PDF file presentation about homebrewing a windom antenna for the HF bands with formulas for 40 and 80 meters bands and step by step guide on making a 4:1 balun to feed the antenna.
[ Hits: 768 | Votes: 2 | Rating: 10 ]

Ham Radio Tools - A free app that is a reference guide that includes logging. It also has short Q code reference sheet, common formulas, and an antenna calculator.
[ Hits: 577 | Votes: 1 | Rating: 10 ]