How to make an antenna dipole to capture wifi signals with this model we can connect to the internet using antenna grids or satellite dish.
I invite you to watch this video where the basic concepts for the construction of a balun are explained.
Index:
1- Design of an antenna dipole.
2- balun symmetry
3- constructive details dipole antenna.
1- The design of the antenna dipole:
It will be used to capture Wi-Fi networks with an operating frequency of 2.4 ghz and a minimum gain of 17 dbi.
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2- Balun symmetry:
A balanced line is one in which the two conductors that form it are at the same potential but with a changed sign with respect to earth, as in the bifilar line. An unbalanced line is the one that has the two conductors at different potential, for example one of them connected to ground, a situation that occurs in coaxial cables. A dipole fed at its center is also a balanced structure.
- A balun manufactured with coaxial cable:
Actually what has been done is to place a transmission line in parallel with the generator and shorted at its end, so that from the generator you will see an impedance that will be the
parallel to that of the antenna and that of the symmetry line. To avoid short-circuiting the generator, if the line is of length λ / 4, an open circuit will be present at its end and the currents will be canceled. It should be noted that, although the length of the symmetry line is not λ / 4, the structure remains symmetric, so the currents in the arms of the antenna will remain the same.
Conclusion: the pieces of line of symmetry are constituted by the same mesh of the coaxial cable in which it has been
made a slot of length λ / 4. As before, the paths from the feed points of the antenna to ground are identical.
Source: antenas-cardama-jofre-rius-romeu-blanch-ferrando.
3- constructive details dipole antenna.
Every detail of the construction is explained in the video, the materials are common and with the right orientation you can start up this project of the construction of your wifi antenna with the installation of this antenna dipole.
Greetings.