This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them. Free Online Engineering Calculator to find the Dimensions of a yagi Uda Antenna for a given Frequency Range and Length.
![Calculator Calculator](http://www.66pacific.com/calculators/images/vertical_antenna.png)
Dipole, Inverted V and Ground Plane Antenna Calculators Online and downloadable Dipole, Inverted V and Ground Plane Calculators. The first online Dipole and Inverted V calculator on the page below has been around for many years and is designed as a simple 'shortcut' so you will not have to do the math using the standard formulas for designing a horizontal dipole or inverted V dipole. It's results may be different than what will work at your particular location and your installation. Antenna calculators are not an exact science so don't expect 'plug and play' results. It has no way of knowing ALL of the variables in your installation. As you may already know, no two antenna installations are alike or identical in many ways, even when using identical antennas and each the same height above ground. The surroundings, height above ground, the ground conductivity, and many other factors can detune most any antenna. Even the length, diameter of wire used, and type of feedline can be a factor to some extent. Using larger conductor diameters for the antenna like aluminum tubing rather than normally used #12 or #14 AWG wire can have an effect that will be different than using the calculator which is designed for normal wire use. The old standby formula 468 / freq in mhz = total length is used in the calculator for an average height of 1/2 wave high and horizontal dipole..and then 5 % is subtracted from that number to get the inverted V lengths. These formulas are used to get you close to the desired lengths......but they will result in ONLY the ball park lengths and not an exact length when you take into consideration all of the factors involved with the environment of the antenna. The calculator assumes that the dipole is high above ground with no obstructions nearby, usually within 1/2 wavelength above ground or higher. Antennas can be much fun to work with even when using an antenna analyzer that will show you what happens when you make changes. If you do have an antenna analyzer then you have an advantage over many others that do not have one. They have to use the old 'cut long and then trim down' method even when using the calculator or the so called 'formulas'. You can 'plug in' different angles of the V and get the results for each angle: Use 5% for 45 degrees (The calculator should already be set for 5, if not change it to your desired angle using ONLY the percentages below. The results will still be 'in the ball park'. |
HINT: Confused about metric to U.S. or U.S. to metric length conversions?
Download this handy conversion program and install it on your computer....FREE!
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