1 2 Wave Dipole Calculator

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The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun.

1 2 wave dipole calculator.

Length feet 468 frequency mhz. Even zip cord such as what is used for lamp cords will perform quite well. The wire size can range from 16 awg to 12 awg. 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.

The radiating element is a quarter wave λ 4 and the radials are 12 longer. This calculator will help you to calculate the different wavelength of antennas based on the frequency. Just grab a calculator and perform the following bit of division. This calculator can be used to design a quarter wave ground plane antenna with radials.

For a dipole or inverted vee antenna. All you need is 2 pieces of wire 3 insulators and a suitable feed line. Place a 1 1 balun on the antenna end of the feedline. This calculator uses a k multiplying factor value of 975 to adjust for the effect of antenna wire diameter on length which is applied to the free space half wavelength equation.

1 2 wave dipole calculator. There are usually four radials three being a minimum but you could use up to six. Use 75 or 50 ohm cable to feed the centre of the dipole. The half wave dipole is very simple to construct.

The inverted vee antenna legs will be longer by 2 6 from those of the horizontal antenna depending on the angle. A 1 2 wavelength dipole is made up of two pieces of wire each 1 4 wavelength long. The dipole antenna is probably the easiest to make. The larger the wire the wider the bandwidth.

The distance between one point to another adjacent point in a wave is known as the wavelength. Enter the frequency in mhz. To make it even easier you can calculate the lengths of wire required to construct a 1 2 wave dipole using this page. 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.

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. This works very well with 18 to 12 wire sizes. It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength.

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