Comments on "On the Power Absorbed and Scattered by an Antenna"

0366691 - ÚFA 2013 RIV US eng J - Journal Article
Schejbal, V. - Fišer, Ondřej - Ondráček, O.
Comments on "On the Power Absorbed and Scattered by an Antenna".
IEEE Antennas and Propagation Magazine. Roč. 53, č. 2 (2011), s. 172-174. ISSN 1045-9243. E-ISSN 1558-4143
Institutional research plan: CEZ:AV0Z30420517
Keywords : Antennas * antenna theory * receiving antennas * electromagnetic scattering * antenna scattering
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Impact factor: 0.968, year: 2011
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In a very interesting recent paper, Dr. Steyskal studied the power absorbed and scattered by an antenna. His comment on the total field in the forward direction could be considered from a slightly more general point of view. According to, the for ward scattering could be considered as a shadow radiation, which does not depend on the whole shape of the scattering object, and is completely determined by the size and the geometry of the shadow contour. Its power equals the total power incident on a scattering object, and it does not depend on the reflection coefficients. This quantity can be considered to be the diffraction limit of the reduc tion of scattering by application of absorbing coatings on a scat tering object. That actually means that the shadow radiation con tains a component in the form of the edge waves diverging from the shadow contour.
Permanent Link: http://hdl.handle.net/11104/0201583