Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analysis of S Band Substrate Integrated Waveguide Power Divider,
  Circulator and Coupler   The Substrate Integrated Waveguide (SIW) technology is a very promising
technique with which we can take the advantages of both waveguides and planar
transmission lines. Therefore, in [2.1-3] GHz band various microwave components
and devices have been designed successfully using Ansoft HFSS software. We then
proceeded to the realization of the coupler and then made measurements of the
frequency response in the range [2.1-3] GHz using a network analyzer. Thus,
results of this modeling are presented, discussed and allow to integrate these
devices in planar circuits.

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The categories of this paper are: math-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
19
The categories of this paper are: eess
2
The categories of this paper are: math
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc