Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Toward creating wide-band uniaxial left-handed materials with small
  losses   In this work a possible realizations of a uniaxial variant of left-handed
material (LHM) at microwaves is considered. The meta-material has some features
of the known structure studied by the group of D. Smith in 2001, however in the
present structure a lattice of parallel wires and a lattice of artificial
magnetic resonators (MRs) are unified and the MRs are not split-ring
resonators. The optimizing of MRs allows significantly decrease the magnetic
losses and broaden the band within which the meta-material becomes a LHM.

23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat