Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental verification of broadband cloaking using a volumetric cloak
  composed of periodically stacked cylindrical transmission-line networks   Cloaking using a volumetric structure composed of stacked two-dimensional
transmission-line networks is verified with measurements. The measurements are
done in a waveguide, in which an array of metallic cylinders is inserted
causing a short-circuit in the waveguide. The metal cylinders are cloaked using
a previously designed and simulated cloak that hides the cylinders and thus
enables wave propagation inside the waveguide.

31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex