Maximum Gain, Effective Area, and Directivity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F19%3A00331165" target="_blank" >RIV/68407700:21230/19:00331165 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1109/TAP.2019.2916760" target="_blank" >https://doi.org/10.1109/TAP.2019.2916760</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TAP.2019.2916760" target="_blank" >10.1109/TAP.2019.2916760</a>
Alternative languages
Result language
angličtina
Original language name
Maximum Gain, Effective Area, and Directivity
Original language description
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 and only partial control of the current distribution. Derived formulas are valid for arbitrarily shaped radiators of a given conductivity. All the optimization tasks are reduced to eigenvalue problems, which are solved efficiently. The second part of the paper deals with superdirectivity and its associated minimal costs in efficiency and Q-factor. The paper is accompanied with a series of examples practically demonstrating the relevance of the theoretical framework and entirely spanning a wide range of material parameters and electrical sizes used in antenna technology. Presented results are analyzed from a perspective of effectively radiating modes. In contrast to a common approach utilizing spherical modes, the radiating modes of a given body are directly evaluated and analyzed here. All crucial mathematical steps are reviewed in the appendices, including a series of important subroutines to be considered making it possible to reduce the computational burden associated with the evaluation of electrically large structures and structures of high conductivity.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20202 - Communication engineering and systems
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE Transactions on Antennas and Propagation
ISSN
0018-926X
e-ISSN
1558-2221
Volume of the periodical
67
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
5282-5293
UT code for WoS article
000481479500016
EID of the result in the Scopus database
2-s2.0-85070596521