Title :
Definition of artificially soft and hard surfaces for electromagnetic waves
Author :
Kildal, Per-Simon
Author_Institution :
Norwegian Inst. of Technol., Trondheim
fDate :
2/4/1988 12:00:00 AM
Abstract :
The widely used transversely corrugated surfaces and other alternative surfaces having the same anisotropic surface impedance deserve a common name. Here it is proposed to call them soft surfaces by analogy with the soft surfaces in acoustics. In the same way artificially hard surfaces are defined. Cylindrical hard waveguides of any cross-sectional shape can support TEM waves
Keywords :
antenna theory; electromagnetic field theory; electromagnetic wave propagation; electromagnetic waves; waveguide antennas; TEM waves; anisotropic surface impedance; artificially hard surfaces; artificially soft surfaces; electromagnetic waves; hybrid mode horn antennas; transversely corrugated surfaces;
Journal_Title :
Electronics Letters
