Capacity Bounds and Degrees of Freedom for MIMO Antennas

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Fältnamn	Indikatorer	Metadata
000		03059naa a2200385 4500
001		oai:lup.lub.lu.se:a70426c4-9a8f-48c6-b4dc-67108f13cb27
003		SwePub
008		210427s2021 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://lup.lub.lu.se/record/a70426c4-9a8f-48c6-b4dc-67108f13cb272 URI
024	7	a https://doi.org/10.1109/TAP.2021.30694322 DOI
040		a (SwePub)lu
041		a engb eng
042		9 SwePub
072	7	a art2 swepub-publicationtype
072	7	a ref2 swepub-contenttype
100	1	a Ehrenborg, Casimiru Catholic University of Leuven4 aut0 (Swepub:lu)eit-cie
245	1 0	a Capacity Bounds and Degrees of Freedom for MIMO Antennas
264	1	c 2021
300		a 13 s.
520		a The optimal spectral efficiency and number of independent channels for MIMO antennas in isotropic multipath channels are investigated when bandwidth requirements are placed on the antenna. By posing the problem as a convex optimization problem restricted by the port Q-factor a semi-analytical expression is formed for its solution. The antennas are simulated by method of moments and the solution is formulated both for structures fed by discrete ports, as well as for design regions characterized by an equivalent current. It is shown that the solution is solely dependent on the eigenvalues of the so-called energy modes of the antenna. The magnitude of these eigenvalues is analyzed for a linear dipole array as well as a plate with embedded antenna regions. The energy modes are also compared to the characteristic modes to validate characteristic modes as a design strategy for MIMO antennas. The antenna performance is illustrated through spectral efficiency over the Q-factor, a quantity that is connected to the capacity. It is proposed that the number of energy modes below a given Q-factor can be used to estimate the degrees of freedom for that Q-factor.
650	7	a TEKNIK OCH TEKNOLOGIERx Elektroteknik och elektronikx Telekommunikation0 (SwePub)202042 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Electrical Engineering, Electronic Engineering, Information Engineeringx Telecommunications0 (SwePub)202042 hsv//eng
653		a antenna theory
653		a computational electromagnetics
653		a degrees of freedom
653		a eigenvalues and eigenfunctions
653		a MIMO communication
653		a optimization
700	1	a Gustafsson, Matsu Lund University,Lunds universitet,Teoretisk elektroteknik,Forskargrupper vid Lunds universitet,Electromagnetic Theory,Lund University Research Groups4 aut0 (Swepub:lu)tde-mgu
700	1	a Capek, Miloslavu Czech Technical University in Prague4 aut0 (Swepub:lu)mi7441ca
710	2	a Catholic University of Leuvenb Teoretisk elektroteknik4 org
773	0	t IEEE Transactions on Antennas and Propagationg 69:9, s. 5388-5400q 69:9<5388-5400x 0018-926X
856	4	u http://dx.doi.org/10.1109/TAP.2021.3069432y FULLTEXT
856	4 8	u https://lup.lub.lu.se/record/a70426c4-9a8f-48c6-b4dc-67108f13cb27
856	4 8	u https://doi.org/10.1109/TAP.2021.3069432

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Av författaren/redakt...: Ehrenborg, Casim ...; Gustafsson, Mats; Capek, Miloslav

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Elektroteknik oc ...; och Telekommunikatio ...

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