The Measurable Q Factor and Observable Energies of Radiating Structures
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
The Measurable Q Factor and Observable Energies of Radiating Structures
Original language description
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
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JA - Electronics and optoelectronics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA13-09086S" target="_blank" >GA13-09086S: An Investigation of Artificial Electromagnetic Materials and Metamaterials with Applied Numerical and Imaging Methods</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2014
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
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Volume of the periodical
62
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
311-318
UT code for WoS article
000329516700036
EID of the result in the Scopus database
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