The Upper Bound on Antenna Gain and Its Feasibility as a Sum of Characteristic Gains

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F24%3A00374568" target="_blank" >RIV/68407700:21230/24:00374568 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1109/TAP.2023.3323763" target="_blank" >https://doi.org/10.1109/TAP.2023.3323763</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TAP.2023.3323763" target="_blank" >10.1109/TAP.2023.3323763</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Upper Bound on Antenna Gain and Its Feasibility as a Sum of Characteristic Gains

Popis výsledku v původním jazyce

The upper bound on antenna gain is expressed as a sum of lossy characteristic modes, specifically, as a sum of characteristic far fields squared. The procedure combines the favorable properties of Harrington’s classical approach to maximum directivity and current-density-based approaches. The upper bound is valid for any antenna or array designed in a given design region for which optimal performance is determined. The decomposition into modes makes it possible to study the degrees of freedom of an obstacle, classify its radiation into normal or super-directive currents, and determine their compatibility with a given excitation. The bound considers an arbitrary shape of the design region and specific material distribution. The cost in Q -factor and radiation efficiency is studied. The extra constraint of a self-resonance current is imposed for an electrically small antenna. The examples verify the developed theory, demonstrate the procedure’s utility, and provide helpful insight to antenna designers. The feasibility of the optimal gain is studied in detail on an example of endfire arrays using the aforementioned decomposition of optimal current density into lossy characteristic modes.

Název v anglickém jazyce

The Upper Bound on Antenna Gain and Its Feasibility as a Sum of Characteristic Gains

Popis výsledku anglicky

The upper bound on antenna gain is expressed as a sum of lossy characteristic modes, specifically, as a sum of characteristic far fields squared. The procedure combines the favorable properties of Harrington’s classical approach to maximum directivity and current-density-based approaches. The upper bound is valid for any antenna or array designed in a given design region for which optimal performance is determined. The decomposition into modes makes it possible to study the degrees of freedom of an obstacle, classify its radiation into normal or super-directive currents, and determine their compatibility with a given excitation. The bound considers an arbitrary shape of the design region and specific material distribution. The cost in Q -factor and radiation efficiency is studied. The extra constraint of a self-resonance current is imposed for an electrically small antenna. The examples verify the developed theory, demonstrate the procedure’s utility, and provide helpful insight to antenna designers. The feasibility of the optimal gain is studied in detail on an example of endfire arrays using the aforementioned decomposition of optimal current density into lossy characteristic modes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

IEEE Transactions on Antennas and Propagation

ISSN

0018-926X

e-ISSN

1558-2221

Svazek periodika

72

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

277-289

Kód UT WoS článku

001203470400002

EID výsledku v databázi Scopus

2-s2.0-85174843550