lossless material

lossless material

[′lȯs·ləs mə′tir·ē·əl]
(physics)
An ideal material that dissipates none of the energy of electromagnetic or acoustic waves passing through it.
References in periodicals archive ?
Although there will always be some small metallic or dielectric losses associated with all non-superconducting metamaterials, the assumption of a lossless material greatly simplifies the analysis of the NRW method.
The conditions under which the extracted material properties may be associated with a lossless material are deduced.
3 (a) is rotated clockwise by 90 degrees respectively to the electric field distribution of the same mode propagated in the analogical waveguide made of lossless material SiC with Im([[epsilon].sup.SiC.sub.r])=0.
If [A.sup.2] [greater than or equal to] 1, then both [epsilon] and [mu] extracted using NRW are real, and thus represent a lossless material [20].
The assumption that [bar.k] = k[??] is fine for lossless materials, or at least systems with hermitian [kappa] and v matrices.
In fact, we shall now show that for antennas with nondispersive-conductivity materials (which include lossless materials as a subset)