2 research outputs found
Detection of the Quantum Illumination Measurement
In this report, we discuss possibilities to detect a signal at the target
from the quantum illumination protocol, that could serve as a quantum radar. We
assume a simple universal detecting schema on the target and study if it is
possible to discover the quantum illumination measurement and in what
conditions considering the microwave regime. Assuming many simplifications, we
found that the possibility or the advantage of the detection of the quantum
illumination measurement strongly depends on the realization of the quantum
illumination protocol.Comment: 8 pages, 4 figures, revised version based on comment
Excitation of Orthogonal Radiation States
A technique of designing antenna excitation realizing orthogonal states is
presented. It is shown that a symmetric antenna geometry is required in order
to achieve orthogonality with respect to all physical quantities. A maximal
number of achievable orthogonal states and a minimal number of ports required
to excite them are rigorously determined from the knowledge of an antenna's
symmetries. The number of states and number of ports are summarized for
commonly used point groups (a rectangle, a square, etc.). The theory is applied
to an example of a rectangular rim where the positions of ports providing the
best total active reflection coefficient, an important metric in multi-port
systems, are determined. The described technique can easily be implemented in
existing solvers based on integral equations.Comment: 12 pages, 12 figures. Submitted to TA