Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimization of Scalar and Bianisotropic Electromagnetic Metasurface
  Parameters Satisfying Far-Field Criteria   Electromagnetic metasurfaces offer the capability to realize almost arbitrary
power conserving field transformations. These field transformations are
governed by the generalized sheet transition conditions, which relate the
tangential fields on each side of the surface through the surface parameters.
Ideally, engineers would like to determine the surface parameters for
transformations based on their application-specific far-field criteria.
However, determining the surface parameters to satisfy these criteria is
challenging without direct knowledge of the tangential fields on one side of
the surface, which are not unique for a given far field pattern. As a result,
current design is restricted to analytical examples where the tangential fields
are solvable or other ad hoc methods. This paper presents a convex
optimization-based scheme which determines surface parameters, such as surface
impedance, admittance, and magneto-electric coupling, which satisfy far-field
constraints such as beam magnitude, side lobe level, and null locations. The
optimization is performed on a model constructed using the method of moments.
This model incorporates edge effects and mutual coupling. The resulting
non-convexity from this model is relaxed using the alternating direction method
of multipliers. Examples of this optimization scheme performing multi-criteria
pattern forming, extreme angle small surface refraction, and Chebyshev
beamforming are presented.

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The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin