Optimal antenna currents for Q, superdirectivity, and radiation patterns using convex optimization

M Gustafsson, S Nordebo - IEEE Transactions on Antennas …, 2012 - ieeexplore.ieee.org
The high Q-factor (low bandwidth) and low efficiency make the design of small antennas
challenging. Here, convex optimization is used to determine current distributions that …

Optimal currents on arbitrarily shaped surfaces

L Jelinek, M Capek - IEEE Transactions on Antennas and …, 2016 - ieeexplore.ieee.org
An optimization problem has been formulated to find a resonant current extremizing various
antenna parameters. The method is presented on, but not limited to, particular cases of gain …

Maximum gain, effective area, and directivity

M Gustafsson, M Capek - IEEE Transactions on Antennas and …, 2019 - ieeexplore.ieee.org
Fundamental bounds on antenna gain are found via convex optimization of the current
density in a prescribed region. Various constraints are considered, including self-resonance …

[PDF][PDF] Antenna current optimization using MATLAB and CVX

M Gustafsson, D Tayli, C Ehrenborg, M Cismasu… - Fermat, 2016 - researchgate.net
Antenna current optimization is a tool that offers many possibilities in antenna technology.
Optimal currents are determined in the antenna design region and used for physical …

Using Huygens multipole arrays to realize unidirectional needle-like radiation

RW Ziolkowski - Physical Review X, 2017 - APS
For nearly a century, the concept of needle radiation has captured the attention of the
electromagnetics communities in both physics and engineering, with various types of …

Mixtures of multipoles—Should they be in your EM toolbox?

RW Ziolkowski - IEEE Open Journal of Antennas and …, 2021 - ieeexplore.ieee.org
Multipole expansions are an essential analysis tool in the foundations of the descriptions of
the electromagnetic fields radiated by electric and magnetic sources. Nevertheless, practical …

Wire resonator as a broadband Huygens superscatterer

D Vovchuk, S Kosulnikov, RE Noskov, P Ginzburg - Physical Review B, 2020 - APS
Interference phenomena allow tailoring propagation of electromagnetic waves by controlling
phases of several scattering channels. Huygens element, being a representative example of …

On Methods to Determine Bounds on the -Factor for a Given Directivity

BLG Jonsson, S Shi, L Wang… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
This paper revisit and extend the interesting case of bounds on the Q-factor for a given
directivity for a small antenna of arbitrary shape. A higher directivity in a small antenna is …

[图书][B] Optimization methods in electromagnetic radiation

TS Angell, A Kirsch - 2004 - books.google.com
The subject of antenna design, primarily a discipline within electrical en-neering, is devoted
to the manipulation of structural elements of and/or the electrical currents present on a …

On two types of convergence in the method of auxiliary sources

G Fikioris - IEEE Transactions on Antennas and Propagation, 2006 - ieeexplore.ieee.org
The method of auxiliary sources (MAS) is often applied to problems involving an externally
illuminated, smooth, perfect electric conductor (PEC). One seeks to approximately satisfy the …