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Antenna matching for performance optimization in compact MIMO systems

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Author

Summary, in English

The implementation of MIMO technology on compact mobile terminal devices poses a unique challenge for system designers. This is because it requires that multiple antennas be closely separated in a confined volume, which results in strong mutual coupling among the antennas and high spatial correlation for the signals. In this paper, we present a review on the latest developments of using uncoupled impedance matching networks to counteract performance degradation due to the aforesaid effects. Then, we extend our previous study of utilizing identical uncoupled matching networks to optimize performance by allowing them to be different across the antennas. The numerical examples reveal that the enlarged optimization search space is effective in improving the received power and correlation, whereas only a modest gain in channel capacity is observed.

Publishing year

2007

Language

English

Publication/Series

Microwave Exhibition and Workshop, 2007

Document type

Conference paper

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Conference name

Microwave Workshop and Exhibition

Conference date

2007-11-28 - 2007-11-30

Conference place

Yokohama, Japan

Status

Published

Project

  • Radiosystem: MIMO technology in compact multiband antenna systems (Vinnova/SonyEricsson, BKL)
  • Radiosystem: Fundamental Limits of Compact MIMO Systems (VR, BKL)

Research group

  • Electromagnetic theory
  • Radio Systems