Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resonant Precession Modulation Based Magnetic Field Receivers   Antenna technology provides the crucial interface between electronic devices
and electromagnetic waves required for wireless communications. This technology
has operated under largely the same general principles for over a century,
resulting in stagnation of advancements in modern times and fundamentally
limiting the extent to which potential applications of wireless communications
may be realized. Herein we propose a novel concept for antenna operation
employing the nonlinear precession dynamics of subatomic spins. An
electromagnetic wave incident on a precessing spin will serve to modulate the
spin frequency of precession. Antennas operating based on a detection of these
spin dynamics are then able to fully characterize the incident wave while
achieving substantial amplifications, higher sensitivities, and smaller form
factors as compared to conventional antennas. A preliminary experimental
implementation of the proposed concept establishes its feasibility and is
already able to demonstrate significant amplification and size benefits.

18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg