Seminario

fiftysixpowersElectronics - Devices

Oct 18, 2013 (3 years and 11 months ago)

122 views







ORGANIZADO POR EL DEPARTAMENTO DE MATEMÁTICA APLICADA.


Seminario

Matemática Aplicada
-

UCM


1
2
:00h. Martes
7 de junio

de 2011



Facultad de CC. Matemáticas

Sala 209. Seminario Alberto Dou.

A.L. Kholmetskii

Department of Physics, Belarus State University, 220030,
Minsk, Belarus

Experimentally Observed Anoma
lously Small Retardation of
Bound (Force) Electromagnetic Fields in Near Zone:

Possible
Implications for Mathematical Physics

Abstract:



Emitted electromagnetic (EM) fields have different dependence on a distance in regions
close and far from the source.
This fact is due to the complex EM field structure which,
according to classical electrodynamics (CED), has two components essentially different by
nature: velocity
-
dependent (bound) and acceleration
-
dependent (radiation) fields [1],[2]. Here it
should be
reminded that in static and quasi
-
static limits, bound contributions are also known as
force fields
. For sources with spatial dimensions much smaller than EM radiation wavelength,
bound fields are dominant within the
near zone

whereas EM radiation componen
ts prevail in
the
far zone
.


At fundamental level this work uncovers the actually incomplete knowledge of the
energy transmission and propagation related to bound (force) electromagnetic (EM) fields. To
deal with this problem, we present experimental appro
ach [3] to a separate study of propagation
characteristics of bound and radiation EM fields. It continues a series of our recent experiments
[4],[5] with improved technical realization extended for different ultra high frequency (UHF)
radiation wavelength.

The experimental results show anomalously small retardation of bound
EM fields within about the half of the near zone size, being in line with previously reported
results provided by different experimental approaches [4],[5] to propagation characteristics

of
bound (force) electromagnetic fields. Possible implications for mathematical physics are also
discussed.

[1] J.D. Jackson,
Classical Electrodynamics
, 2nd Ed. (Wiley, NY, 1975)

[2] L.D. Landau and E.M. Lifshitz,
The Classical Theory of Fields
, (Addison
-
Wesley, 1951)

[3] O.V. Missevitch, A.L. Kholmetskii and R. Smirnov
-
Rueda,
Euro. Phys. Lett.
,
93

(2011)
64004

[4] A.L. Kholmetskii, O.V. Missevitch, R. Smirnov
-
Rueda,
J. Appl. Phys
.,
101

(2007) 023532

[5] A.L. Kholmetskii, O.V. Missevitch, R. Smirnov
-
Rueda,

J. Appl. Phys
.,
102

(2007) 013529