1 4 Wave Mobile Antenna Calculator

Ahh the good old quarter wave ground plane.

1 4 wave mobile antenna calculator.

One might have seen long straight rod on the car it is known as whip antenna. It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. If you have no particular preference within a given ham radio band then simply enter its center frequency i e. The radiating element is a quarter wave λ 4 and the radials are 12 longer.

Enter your desired frequency mhz of operation i e. This calculator will help you to calculate the different wavelength of antennas based on the frequency. This whip antenna calculator calculates various parameters of whip antenna or monopole antenna. 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. This calculator can be used to design a quarter wave ground plane antenna with radials. Enter one only one value the desired frequency or the antenna length in any length field. There are usually four radials three being a minimum but you could use up to six.

1 4 wave antenna calculator. This calculator on the whip antenna mentions formula or equations used for calculations. The distance between one point to another adjacent point in a wave is known as the wavelength. It consists of flexible wire.

7 15 for the 40 meter band. A horizontal 1 2 wave length dipoles will have a feed point of about 73 ohms while the inverted vee antennas have a feed point of about 52 ohm s. Frequency calculations are based on radio waves traveling at the speed of light 299 792 458 meters per second. Both can be used with or without a 1 1 balum although the use of a 1 1 balum will change the feed point of the unbalanced coax to a balanced antenna load there by reducing the chance of radiation from.

Use our simple calculator to determine approximate dimensions of materials needed to build a vertical antenna. I have been making a few 1 4 wave antennas lately mainly for uhf and the ghz bands with good success so i decided to create a calculator to simplify the process and maybe get some people who have not tried one before to give it a go. The antenna calculator for half wave dipoles. Whip antenna calculator monopole antenna calculator.

Of nearly all antenna designs the 1 4 wave requires the most space making it difficult to place with other antennas on a mast.