On physical limitations for broadband electromagnetic scattering --- high order spherical waves

• Limitations on the scattering matrix are derived for a wide class of objects, restricting their broadband interaction with electromagnetic vector spherical waves in terms of their size, shape and static material properties. In particular, it is seen that the order of the dominating term for electrically small objects increases with the order of the spherical wave. The results are applicable to many areas concerned with electromagnetic waves interacting with matter. For instance, they open up a new approach to derive bounds on antenna performance. They can also be generalized to acoustic and elastodynamic scattering. Two intermediate results presented are a set of sum rules for and the low-frequency asymptotic expansions of the scattering and transition matrices of a general scatterer.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Publikations- och innehållstyp

kon (ämneskategori)

ref (ämneskategori)