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Characteristic mode based tradeoff analysis of antenna-chassis interactions for multiple antenna terminals

In English

Författare

Summary, in English

The design of multiple antennas in compact mobile terminals is a significant challenge, due to both practical and fundamental design tradeoffs. In this paper, fundamental antenna design tradeoffs of multiple antenna terminals are presented in the framework of characteristic mode analysis. In particular, interactions between the antenna elements and the characteristic modes and their impact on design tradeoffs are investigated in both theory and simulations. The results reveal that the characteristic modes play an important role in determining the optimal placement of antennas for low mutual coupling. Moreover, the ability of antenna elements to localize the excitation currents on the chassis can significantly influence the final performance. To demonstrate the effectiveness of the proposed approach, a dual-band, dual-antenna terminal is designed to provide an isolation of over 10 dB for the 900 MHz band without additional matching or decoupling structures. A tradeoff analysis of bandwidth, efficiency, effective diversity gain and capacity is performed over different antenna locations. Finally, three fabricated prototypes verify the simulation results for representative cases.

Publiceringsår

2012

Språk

Engelska

Sidor

490-502

Publikation/Tidskrift/Serie

IEEE Transactions on Antennas and Propagation

Volym

60

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

IEEE - Institute of Electrical and Electronics Engineers Inc.

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

  • mobile communication
  • MIMO systems
  • Antenna array mutual coupling

Status

Published

Forskningsgrupp

  • Electromagnetic theory
  • Radio Systems

ISBN/ISSN/Övrigt

  • ISSN: 0018-926X