Uncoupled antenna matching for performance optimization in compact MIMO systems using unbalanced load impedance

Ruiyuan Tian, Buon Kiong Lau

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceedingPeer review

200 Nedladdningar (Pure)

Sammanfattning

Some MIMO applications require antennas to be closely spaced, which result in mutual coupling among antennas and high spatial correlation for signals. In order to compensate for the performance degradation due to correlation and coupling, impedance matching networks may be used. Recently, it was shown that uncoupled matching networks could be optimized against a given performance metric with the constraint of similar matching impedance for all antennas, i.e., balanced matching. In this paper, we investigate the use of uncoupled matching networks with both balanced and unbalanced load impedances, where either the received power or the channel capacity is optimized. For two- and three-element dipole arrays, we show numerically that a significant performance improvement can be achieved by introducing unbalanced matching. Observations suggest that the achieved improvement varies with array geometry and propagation environment. For example, a large capacity gain of up to 23% is realized when matching a uniform linear array to propagation environments that are asymmetrical about the array broadside, whereas the symmetrical environments do not benefit as much from unbalanced matching.
Originalspråkengelska
Titel på värdpublikationIEEE Vehicular Technology Conference, VTC Spring 2008.
Sidor299-303
Antal sidor5
DOI
StatusPublished - 2008
EvenemangIEEE Vehicular Technology Conference (VTC Spring 2008) - Singapore, Singapore
Varaktighet: 2008 maj 112008 maj 14

Publikationsserier

Namn
ISSN (tryckt)1550-2252

Konferens

KonferensIEEE Vehicular Technology Conference (VTC Spring 2008)
Land/TerritoriumSingapore
Period2008/05/112008/05/14

Ämnesklassifikation (UKÄ)

  • Elektroteknik och elektronik

Fingeravtryck

Utforska forskningsämnen för ”Uncoupled antenna matching for performance optimization in compact MIMO systems using unbalanced load impedance”. Tillsammans bildar de ett unikt fingeravtryck.

Citera det här