Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precise microwave characterization of MgO substrates for HTS circuits
  with superconducting post dielectric resonator   Accurate data of complex permittivity of dielectric substrates are needed for
efficient design of HTS microwave planar circuits. We have tested MgO
substrates from three different manufacturing batches using a dielectric
resonator with superconducting parts recently developed for precise microwave
characterization of laminar dielectrics at cryogenic temperatures. The
measurement fixture has been fabricated using a SrLaAlO3 post dielectric
resonator with DyBa2Cu3O7 end plates and silver-plated copper sidewalls to
achieve the resolution of loss tangent measurements of 2 {\times} 10-6. The
tested MgO substrates exhibited the average relative permittivity of 9.63 and
tan {\delta} from 3.7 {\times} 10-7 to 2 {\times} 10-5 at frequency of 10.5 GHz
in the temperature range from 14 to 80 K.

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The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci