How To Make A Dipole Antenna?

A dipole antenna is a widely used form of the antenna for telecommunication and radio purposes. The structure of the dipole antenna is very simple, and it is the simplest type of antenna. It has two conductive elements, which are mostly metallic in nature.

The working of a dipole antenna is very interesting. The antenna is divided into two half which receives the output signal; the transmitter drives the electric current from the antenna.

Structure Of A Dipole Antenna

The structure of a dipole antenna is quite simple. It has two conductors equal in length that are connected with each other with a feedline in between. The feedline is a determining factor that determines the frequency the antenna would be allowed to catch. If it is shortened, then the antenna can easily catch signals of a particular frequency.

Half-Wave Dipole Antenna

Suppose dipole antenna has a half wavelength. It is also called an omnidirectional antenna as it is installed vertically. It is called a half-wave dipole antenna because the direction of half-wave radiation is perpendicular to the surface of the conductor.

Yagi Antennas 

Yagi antennas are more complex designs of antennas. They are low gain antennas. They can also be said as directional antennas as they capture the signal from one direction only.

How To Make A Half-Wave Dipole Antenna?

 A half-wave dipole antenna is the simplest type of antenna and works best for the conduction of signals. Dipole antenna two corners or poles that are connected to a radiated element. There is a direct relationship between voltage and current in a dipole antenna. At the center point of the antenna, the voltage is minimum, whereas the current is maximum.

If a dipole antenna is mounted in a horizontal reaction, most of its power is radiated at the axis of the cable to right angles. The direction of the face of the antenna is kept where you want to attract most of the signals. The frequency of a half-wave dipole antenna is kept one-third wavelength in its length.

Half-wave dipole antenna, the length of half-wave is considered as the half-length of the signal. The other determining factors are the velocity length and diameter of the wire used for making the antenna. The frequency of a dipole antenna is to be measured in order to depict the signal strength it would be able to catch.

The length of the wire is an important determining factor in a dipole antenna. The wire is cut slightly longer than the required amount; then, it is better to twist one end of the wire to give it a perfect match with frequency. The length of the antenna needs to be adjusted to give it the proper band length to catch proper signals.

How To Create A Simple Dipole Antenna?

Create A Simple Dipole Antenna

Here a few simple tips to help you in making the dipole antenna perfectly at your home.

  • First of all, check the frequency that you want; the length of the dipole antenna is determined by the frequency of signal strength.
  • The next step is making a conductor; what is the purpose you can use a copper wire or a metallic sheet of copper?
  • The third step is to get a coaxial cable from which you would make your dipole antenna. The length of the coaxial cable should be according to frequency.
  • The fourth step is calculating the wavelength of the signal. For this purpose, we use the simple formula of dividing the speed of light by frequency. This determines the exact length of the coaxial cable.
  • Now cut the wire in length a few inches longer than your requirement because we are making a dipole antenna.
  • The next step involves the installation of the conductor. Here comes the copper plate that we chose earlier as a conductor. We need to fix the copper plate that had a distance of square of half wavelength.
  • Now, as we have to take the measurements of fixing the conductor plate, the next step is to pass the coaxial cable through the copper conductor plate. For this purpose, drill in a hole to the center of the conductor plate.
  • We need to pair the coaxial cable so that it is pulled back and its inside insulator is revealed.
  • The next step is to push the cable through the conductor hole so that the insulation part of the coaxial cable is revealed. No folding the conductor connect it to the ground conductor plate.
  • Now we need to clear the insulation and pull it back so that the signal conductor is revealed.
  • The last step is to connect a copper wire with the conducted portion of the coaxial cable that has been exposed earlier.

So, this is how a simple dipole antenna is made.

How To Make A High-Frequency Dipole Antenna?

Dipole antennae are easy to build. It is thought that dipole antenna works best for half wavelength, but it is not so. Dipole antennas can be used on different wavelengths and frequencies like 10 meters, 20 meters, and 80 meters. There are a few things that you need to have in order to make a perfect dipole antenna.

Antenna where is the first and foremost thing that you must have for making an antenna. You eat your copper wire is used for making an antenna it is because copper is less flexible and does not tend to break easily, so it makes your antenna more durable.

The other most important things are the insulators. Insulators are needed to be attached to the antenna. Insulators are used at the end of the antenna, where the voltage is usually high.

A High-Frequency Dipole Antenna

Small pulleys are also needed to keep the antenna fixed in place. Suppose you are attaching the antenna with a tree, then you need to attach some support with it so that it does not get disconnected while the tree sways.  This support or weight that we attach with the antennas is pulleys.

The center of the dipole antenna needs some attachment to connect the two sides of copper wires. An antenna insulator is used to form the dipole antenna center. It is required to create a balance between two sides or poles of the antenna wires.

The easiest and simplest way of installing a dipole is a horizontal dipole antenna. The two wires of the dipole antenna are bent at a 90-degree angle and are connected with each other through a central feeding point.

The current level is kept maximum in the center feeding point of the dipole antenna. It is because the maximum current level in the center allows the antenna to catch the maximum frequency wavelength.

A half-wave dipole antenna is bent into two equal wavelength wires. They are a quarter wavelength and combined; they form a complete half-wavelength dipole antenna.

What Is A Ham Band Dipole Antenna?

A ham band dipole antenna is generally a high-placed antenna. It is attached on the rooftop for the chimney of the house. One and of the antenna is at the top of the house, and the other is connected to a pole or tree with the help of an insulation wire. Pulleys and supports are needed to be attached, with one end of the antenna attached with a tree.

The length of the antenna wire is important in a dipole antenna. Mostly the length of coaxial cables of the antenna is measured and taken according to the half wavelength of signal frequency.

Ham Band Dipole Antenna

But the length of the antenna wire depends upon many factors such as the thickness of the wire and the quality of the coaxial cable.

The length of a dipole antenna needs to be fixed based on its operation with a specific section of the band of frequency that it intends to catch. The frequency levels at the top and bottom of the band are different, so they need to be considered before cutting the wires of a specific length.

What Is A Sleeve Balun?

If you want to improve the conduction of your antenna, then you can consider making a sleeve balun. It uses a metallic pipe, and the coaxial cable is passed through the metallic pipe or placed inside it. One end of the coaxial cable is attached with a pipe having a specific wavelength. The other side of the coaxial cable is at the open end.

One end of the pipe is open, which allows the conduction of current through the coaxial cable of the antenna. It increases the signal receiving capacity of a dipole antenna and can be used for the antenna, which has an issue in catching the signals of a specific wavelength.

Rabbit Ears Dipole Antenna

Rabbit ears antenna is a dipole antenna which is the most common type of TV antenna found almost everywhere. Its frequency range is between 174 to 217 megahertz. The frequency range of rabbit ears dipole antenna is larger as compared to a normal dipole antenna.

It consists of a base attached with two metallic wires at both ends, which conducts the electrical signals of specific wavelength and frequency. The metallic wires or rods are extended about 1.5 meters from the base, which makes the rabbit a dipole antenna specialized for receiving signals.

FM Dipole Antennas

FM dipole antennas can also be called tuners. They are the most flexible type of antennas and probably the smallest type of dipole antennas available. They are easy to install; they can either be taped or nailed with walls.

FM dipole antennas can also be called simple dipole antennas. The signal that they carry has a very narrow range of frequency and wavelength. FM dipole antennas can easily be installed in your homes as well as in your cars if you are interested in listening to the radio.

Conclusion

So, there are many kinds of dipole antennas available, each with the same purpose of catching the signal with a specific frequency and wavelength. Making a simple dipole antenna for a half-wavelength dipole antenna is very easy if you have a wire, a coaxial cable, and a conduction plate available.

Each type of dipole antenna is fixed for receiving a specific wavelength and frequency. An FM dipole antenna catches the wavelength at a very narrow range, whereas the rabbit ear dipole antenna catches wavelength at a larger range.

RadioMaster
 

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