Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Compact broadband planar orthomode transducer   We present the design and test results of a compact C-band orthomode
transducer which comprises four rectangular probes orthogonally arranged in a
circular waveguide, designed to work in the WG13 band. Measurements of the
system in the frequency range 4.64 GHz to 7.05 GHz agree very well with
simulation results and show a cross-polarisation level below -58 dB, a return
loss of about -20 dB, and an insertion loss difference of less than 0.18 dB
between the orthogonal polarisation modes across the full waveguide band.

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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess