The condition for resonance in a linear dipole antenna is usually that the electrical length be equal to a multiple of a half-wavelength, λ / 2, while for a monopole antenna it is a multiple of a quarter-wavelength, λ / 4.

For example, a vertical monopole antenna requires a ground plane that often consists of an interconnected network of wires running radially away from the base of the antenna for a distance about equal to the height of the antenna.

In a monopole antenna, the radiation pattern of the monopole plus the virtual " image antenna " make it appear as a two element center-fed dipole antenna.

So a monopole mounted over an ideal ground plane has a radiation pattern identical to a dipole antenna.

It was a monopole antenna, 7. 5 meters long.

Diagram of the electric field s ( E ) and magnetic field s ( H ) of radio waves emitted by a Monopole antenna | monopole radio transmitting antenna ( radio ) | antenna ( small dark vertical line in the center ).

Either the towers themselves or vertical wires serve as monopole radiators, and the horizontal cables form a capacitive top-load to increase the efficiency of the antenna.

The vertical antenna, on the other hand, is a monopole antenna.

The vast majority of designs are fed with a balanced line ( unlike a monopole antenna ) and are based on the dipole antenna with additional components ( or elements ) which increase its directionality.

A simple conical monopole antenna is a wire approximation of the solid biconical antenna and has increased bandwidth ( over a simple monopole ).

Since monopole antennas rely on a conductive ground, a so-called grounding structure may be employed to provide a better ground contact to the earth or which itself acts as a ground plane to perform that function regardless of ( or in absence of ) an actual contact with the earth.

Because of his enthusiasm for natural sciences, he discovered the monopole ( as opposed to the then well known dipole ), but this discovery fell into oblivion until it was confusedly revived by 20th century economists.

The feedline from the transmitter or receiver is connected between the bottom end of the monopole element and the ground plane.

In that sense it is a simple monopole, but at the top of the mast extra wires are connected ( usually about six ) which slope downwards at an angle of 40-45 degrees as far as about one-third of the total height, where they are terminated in insulators and thence outwards to ground anchors.

The wire antennas used with crystal receivers are monopole antennas which develop their output voltage with respect to ground.

The transmission system is currently composed of two bipole transmission lines with their converter stations and ground return electrodes to enable monopole operation.

With the classical tuned monopole the displacement current extends as far away as half a wavelength from the mast independent of its height ; this is also the maximum distance covered by the ground surface currents closing the antenna electric circuit.

For this reason the classical tuned monopole needs a much larger high conductive ground plane than is needed for the CFA to maintain a high level of efficiency.

Ground planes are particularly used with monopole antennas.

In a 1977 article he demonstrated that instanton effects give the photon a mass, where the instanton is a't Hooft-Polyakov monopole embedded in an ultraviolet nonabelian gauge group.

SWF was constructed rigorously in the book of Peter Kronheimer and Tomasz Mrowka, where it is known as monopole Floer homology.

Whereas Skyrme's example involved pion physics, there is a much more familiar example in quantum electrodynamics with a magnetic monopole.

A bosonic monopole with the smallest possible magnetic charge and a bosonic version of the electron will form a fermionic dyon.

** Magnetic monopole, a hypothetical particle that may be loosely described as a magnet with only one pole

* Magnetic monopole is a hypothetical particle that may be loosely described as " a magnet with only one pole ".

Magnetic fields from magnetic bodies of ore fall off with the inverse distance cubed ( dipole target ), or at best inverse distance squared ( magnetic monopole target ).

A magnetic monopole is a hypothetical particle in particle physics that is an isolated magnet with only one magnetic pole ( a north pole without a south pole or vice-versa ).

* Magnetic monopole, or Dirac monopole, a hypothetical particle that may be loosely described as a magnet with only one pole, or related concepts in physics and mathematics:

The antenna acts similarly to an electrically short dipole or monopole, and the radiation pattern, similar to these antennas is omnidirectional, with maximum radiation at right angles to the helix axis.

The theory of hyperfine structure comes directly from electromagnetism, consisting of the interaction of the nuclear multipole moments ( excluding the electric monopole ) with internally generated fields.

In physics, a Dirac string is a fictitious one-dimensional curve in space, conceived of by the physicist Paul Dirac, stretching between two Dirac magnetic monopoles with opposite magnetic charges, or from one magnetic monopole out to infinity.

A dyon with a zero electric charge is usually referred to as a magnetic monopole.

The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang ; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.

* Effective monopole-radiated power, which is similar to EIRP but with a reference antenna of an electrically short monopole

Unlike the Dirac monopole, the't Hooft – Polyakov monopole is a smooth solution with a finite total energy.

The radio waves are usually introduced into the waveguide by a coaxial cable attached to the side, with the central conductor projecting into the waveguide to form a quarter-wave monopole antenna.

Instead of the flux vector E < big >×</ big > B as above, it is possible to follow the same style of derivation, but instead choose the Abraham form E < big >×</ big > H, the Minkowski form D < big >×</ big > B, or perhaps D < big >×</ big > H. Each choice represents the response of the propagation medium in its own way: the E < big >×</ big > B form above has the property that the response happens only due to electric currents, while the D < big >×</ big > H form uses only ( fictitious ) magnetic monopole currents.

the field of a localized charge distribution by its monopole and

Particularly at lower frequencies, the high inductance and capacitance compared to its low radiation resistance makes the loaded antenna behave like a high Q tuned circuit, with a narrow bandwidth over which it will remain impedance matched to the transmission line, compared to a λ / 4 monopole.

La Tâche is Domaine de la Romanée Conti's other monopole, and its 6 ha consist of the vineyards of La Tâche and Les Gaudichots.

They also provide no explanation of the magnetic monopole problem.

Later analyses have pointed out that these are the modes most susceptible to foreground contamination from synchrotron, dust, and free-free emission, and from experimental uncertainty in the monopole and dipole.

This is simply one term in the multipole expansion when the total charge (" monopole moment ") is 0 — as it always is for the magnetic case, since there are no magnetic monopoles.

The dipole term is the dominant one at large distances: Its field falls off in proportion to 1 / r < sup > 3 </ sup >, as compared to 1 / r < sup > 4 </ sup > for the next ( quadrupole ) term and higher powers of 1 / r for higher terms, or 1 / r < sup > 2 </ sup > for the monopole term.

Their absence is known as the monopole problem in cosmology.

A monopole — if such a thing exists — would be a new and fundamentally different kind of magnetic object.

The simplest antennas, monopole and dipole antennas, consist of one or two straight metal rods along a common axis.

When the rear radiation is absorbed or trapped in a box, the diaphragm becomes a monopole radiator.

50 Ω also works out well because it corresponds very closely to the drive impedance of a half-wave dipole in real environments, and provides an acceptable match to the drive impedance of a quarter-wave monopole, as well.

Examples of topological solitons include the screw dislocation in a crystalline lattice, the Dirac string and the magnetic monopole in electromagnetism, the Skyrmion and the Wess – Zumino – Witten model in quantum field theory, and cosmic strings and domain walls in cosmology.

A major practical drawback to this band is that because of the length of the waves, full size resonant antennas ( half wave dipole or quarter wave monopole antennas ) cannot be built because of their physical height.

In particular, a magnetic monopole, the magnetic analogue of an electric charge, has never been observed.