Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Loss tangent measurements of dielectric substrates from 15 K to 300 K
  with two resonators: investigation into accuracy issues   The loss tangent of medium, low and very low loss dielectric substrates
(including the Rogers RT Duroid 5880 and 6010.2, LaAlO3, (La, Sr)(Al, Ta)O3,
MgO and Quartz) was measured at varying temperatures with two TE01{\delta}
dielectric resonators to ensure verification of the tests. The accuracy of the
measurements has been researched and discussed for split post dielectric
resonator (SPDR) in a copper enclosure and a single post dielectric resonator
(SuPDR) in a superconducting enclosure in the temperature range from 15K to 300
K.

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The categories of this paper are: astro-ph
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio