MIMO Capacity Improvement in the Presence of Antenna Mutual Coupling

R. Mohammadkhani, John Thompson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Applying MIMO technology in small
wireless devices leads to closely spaced antennas,
which results in antenna mutual coupling (MC) and
highly correlated signals. In this paper, we investigate
the effect of the terminal load impedance of
the antennas on the MIMO capacity in the presence
of the mutual coupling. We use a new concept of
receiving mutual impedances to model the MC effect,
which has been shown to have a much better
performance than the conventional open-circuit voltage
method in different applications of array antennas.
Simulation results for a 2×2 MIMO system with
half-wavelength dipoles in different scattering distribution
scenarios, show that in our proposed method,
an optimum value of the terminal load impedance
ZL of the antennas can be obtained to maximise the
capacity for all scattering distributions, whereas the
conventional methods need to different ZL in different
scattering scenarios.
Original languageEnglish
Title of host publicationElectrical Engineering (ICEE), 2010 18th Iranian Conference on
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages167-171
ISBN (Print)978-1-4244-6760-0
DOIs
Publication statusPublished - 2010

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