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Potencial de la tierra. The radiation efficiency is three times bigger than in the previous case and the antenna gain is 6 dB better. In this page you will find an analysis of several monopole configurations, the differences between a perfect and an imperfect ground and the effects of using monppolo ground plane made of radials or counterpoises.

J-Pole 10 y 6m. Yagi de 3 elementos.

The hardest part in making the balun is getting the 14 turns of wire wound around the core, equally spaced, while keeping track of of which wire is which. Mantenimiento de la TT. YES, it is important. The instructions of the assembly of the antenna say to slip one section over another, but the fear was that just the pressure of pushing sections together would not be satisfactory for an RF connection. La radio en la escuela. Ganancia en dB de una Antena.

antena monopolo con polarizaciĆ³n – English Translation – Word Magic Spanish-English Dictionary

This is a basic balun for a wire antenna, and it worked great for the flagpole! The resulting SWR is 1: With an adequated counterpoise length we can also achieve the impedance matching in the working band. This was our in! If we compare the results with those of example 3, we achieve an improvement of 0,8 dB in the antenna gain, with the additional advantage of having an omnidirectional radiation pattern. Those effects would be even worse over a dry soil. This started out being a stelth antenna for a friend.


Un ejemplo de este tipo de antena, usando un balun, es la que presenta Frederick R. Ancho de banda de una antena. La antena vertical es una antena completa, pero necsita de un plano de masa o de tierra para poder funcionar correctamente y para que su eficiencia sea igual a la de una antena dipolo.

EA4FSI-28T1 – HF Antennas

El plano de tierra sntena ser natural una superficie como la del maro artificial, anhena por una serie de conductores unidos a la base de la antena vertical. Vertical con carga lineal. Manos libres con Walkies Icom. Resistencia Total de la antena. Monopole with 4 radials. A 35 foot pole should work well for 40 meters.

Vobbe, W8HDU en http: After our counterpoise length optimization process, the SWR is around 1: It also includes the results obtained simulating several radial configurations up to radials.

The real ground makes the currents flowing out of the antenna to return though a medium of low electric conductivity. Since then “George” has earned his WAS for 20 meters. Monopole over perfect ground.



For 20 meters this would be just under 20 feet. The takeoff angle of radiation was not too bad. However, under this condition the monopole is no more an omnidirectional antenna, having more directivity in the direction imposed by the counterpoise.

Connections for RH circular polarization. There are several theories about the optimal length of the radials.

The antenna is omnidirectionalthanks to the simulated perfect ground plane, and its gain is 5,15 dBi 3 dBdthat is, twice the gain of a aantena dipole fig. The radiation pattern is again omnidirectional, thanks to the layout of the 4 radials fig. The analysis are based on simulations performed with the 4NEC2 software and are performed introducing new monopoli in successive aproximations. In the 4NEC2 simulation, in order to avoid the counterpoise to be in direct contact with the ground, we will rise the whole structure 0,1 meters above the ground.