Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complete S-matrix in a microwave cavity at room temperature   We experimentally study the widths of resonances in a two-dimensional
microwave cavity at room temperature. By developing a model for the coupling
antennas, we are able to discriminate their contribution from those of ohmic
losses to the broadening of resonances. Concerning ohmic losses, we
experimentally put to evidence two mechanisms: damping along propagation and
absorption at the contour, the latter being responsible for variations of
widths from mode to mode due to its dependence on the spatial distribution of
the field at the contour. A theory, based on an S-matrix formalism, is given
for these variations. It is successfully validated through measurements of
several hundreds of resonances in a rectangular cavity.

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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
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The categories of this paper are: math
30
The categories of this paper are: q-alg