It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength.
1 2 wave dipole calculator.
The radiating element is a quarter wave λ 4 and the radials are 12 longer.
1 2 wave dipole calculator.
Enter the frequency in mhz.
Calculating the lengths of the 1 2 wavelength wires is simple.
The distance between one point to another adjacent point in a wave is known as the wavelength.
All you need is 2 pieces of wire 3 insulators and a suitable feed line.
The inverted vee antenna legs will be longer by 2 6 from those of the horizontal antenna depending on the angle.
The larger the wire the wider the bandwidth.
This could be 50 ohm types such as rg58 rg8x rg8 rg213 or 75 ohm type such as rg11 rg59 rg6 or even 75 ohm twin lead.
Just grab a calculator and perform the following bit of division.
The measurements below are for building a simple dipole antenna.
The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun.
For a dipole or inverted vee antenna.
There are usually four radials three being a minimum but you could use up to six.
The basic formula for determining the wire length of a center fed 1 2 wave wire dipole or inverted vee antenna 30 mhz or less is 468 freq in mhz for feet and inches or 143 freq in mhz for meters.
Use 75 or 50 ohm cable to feed the centre of the dipole.
The half wave dipole is very simple to construct.
The impedance of this antenna is around 300 ω so you may want to use a transformer or a λ 4 long piece of 120 ω coaxial cable to match this impedance to 50 ω.
Even zip cord such as what is used for lamp cords will perform quite well.
The dipole antenna is probably the easiest to make.
To make it even easier you can calculate the lengths of wire required to construct a 1 2 wave dipole using this page.
A 1 2 wavelength dipole is made up of two pieces of wire each 1 4 wavelength long.
This calculator can be used to design a quarter wave ground plane antenna with radials.
This calculator will help you to calculate the different wavelength of antennas based on the frequency.
The wire size can range from 16 awg to 12 awg.
Place a 1 1 balun on the antenna end of the feedline.
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.
