Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modeling of the substrate influence on multielement THz detector
  operation   The development of THz multielement uncooled imagers based on focal plane
arrays (FPAs) requires an optimization of the system parameters to achieve a
homogeneous sensitivity of the array elements. Results of numerical simulation
of the eight-element linear array of planar antennas with detecting elements,
on a substrate of finite dimensions are presented. We establish how the
substrate thickness h and the relative permittivity epsilon influence antenna
pattern and antenna-detector matching for each element. We show that the
antenna pattern depends on the detector position more than the antenna-detector
impedance matching. The gain of array elements, the antenna-detector matching,
and the homogeneity of the detector sensitivity can be simultaneously optimized
by the proper choice of the substrate thickness h and the relative permittivity
epsilon. We show that multielement systems with large substrate thickness and
high relative permittivity are not suitable for the imaging system
implementation. To achieve uniform multielement system sensitivity, substrates
with low permittivity (epsilon < 5) and/or low thickness (h < 60 mkm for the Si
substrate) should be used. Finally, we investigate the operation of the
detector array with optimally chosen substrate parameters together with the
focusing lens, and show that the system is able to work as FPA without
significant image corruption.

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The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom