Basic antenna elements

Basic antenna elements:

The basic antenna elements are five in number. They are:

1.Alternating current element or Hertzian dipole

2.Short dipole

3.Short monopole

4.Half-wave dipole

5.Quarter-wave monopole

1. Alternating current element or Hertzian dipole:

It is a short linear antenna in which the current along its length is assumed to be constant.

2.Short dipole:

It is a linear antenna whose length is less than    and the current distribution is assumed to be triangular.

3.Short monopole:

It is a linear antenna whose length is less than    and the current distribution is assumed to be triangular.

4.Half-wave dipole:

It is a linear antenna whose length is    and the current distribution is assumed to be sinusoidal. It is usually center-fed.

5.Quarter-wave monopole:

It is a linear antenna whose length is     and the current distribution is assumed to be sinusoidal. It is fed at one end with respect to earth.

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