The Measurable Q Factor and Observable Energies of Radiating Structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F14%3A00208988" target="_blank" >RIV/68407700:21230/14:00208988 - isvavai.cz</a>

Výsledek na webu

<a href="http://ieeexplore.ieee.org" target="_blank" >http://ieeexplore.ieee.org</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TAP.2013.2287519" target="_blank" >10.1109/TAP.2013.2287519</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Measurable Q Factor and Observable Energies of Radiating Structures

Popis výsledku v původním jazyce

New expressions are derived to calculate the Q factor of a radiating device. The resulting relations link Q based on the frequency change of the input impedance at the input port (QX, QZ) with expressions based solely on the current distribution on an radiating device. The question of which energies of a radiating system are observable is reviewed, and then the proposed Q factor as defined in this paper is physical. The derivation is based on potential theory rather than fields. This approach hence automatically eliminates all divergent integrals associated with electromagnetic energies in infinite space. The new formulas allow us to study the radiation Q factor for antennas without feeding (through e.g. Characteristic Modes) as well as fed by an arbitrary number of ports. The new technique can easily be implemented in any numerical software dealing with current densities. To present the merits of proposed technique, three canonical antennas are studied. Numerical examples show excelle

Název v anglickém jazyce

The Measurable Q Factor and Observable Energies of Radiating Structures

Popis výsledku anglicky

New expressions are derived to calculate the Q factor of a radiating device. The resulting relations link Q based on the frequency change of the input impedance at the input port (QX, QZ) with expressions based solely on the current distribution on an radiating device. The question of which energies of a radiating system are observable is reviewed, and then the proposed Q factor as defined in this paper is physical. The derivation is based on potential theory rather than fields. This approach hence automatically eliminates all divergent integrals associated with electromagnetic energies in infinite space. The new formulas allow us to study the radiation Q factor for antennas without feeding (through e.g. Characteristic Modes) as well as fed by an arbitrary number of ports. The new technique can easily be implemented in any numerical software dealing with current densities. To present the merits of proposed technique, three canonical antennas are studied. Numerical examples show excelle

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-09086S" target="_blank" >GA13-09086S: Výzkum umělých elektromagnetických materiálů a metamateriálů s užitými numerickými a zobrazovacími metodami</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

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

—

Svazek periodika

62

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

311-318

Kód UT WoS článku

000329516700036

EID výsledku v databázi Scopus

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