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SWG 1.1 - Antenna System Aspects (ASA)

Chairman: Dr. Buon Kiong Lau, Lund University, Sweden

The subworking group is a natural continuation of COST 259 SWG2.2, COST 273 SWG2.2 and COST 2100 SWG2.2, minus over-the-air (OTA) standardisation activities, which are now the focus of a new topical working group (TWG-O). In particular, the subgroup’s efforts are directed towards antenna system aspects that are relevant to both efficient and high speed communications. As opposed to the traditional antenna design approach of satisfying requirements defined by antenna parameters, the subgroup adopts a holistic approach, in which the emphasis is the impact of the antenna system as well as its interaction with the surroundings on the overall communication system performance. A case in point is a mobile terminal’s antenna system: Due to MIMO operation and stricter performance requirements, it is no longer adequate to only consider its performance in free space, but also in typical usage scenarios such as the  browsing or gaming mode. Moreover, system based parameters such as capacity, diversity gain and multiplexing efficiency are now becoming more important than conventional antenna parameters such as impedance bandwidth and radiation patterns.

Items being considered in this subgroup include:

  • Actual link and system performance gain of antenna systems compared to conventional single antennas under typical small terminal conditions (typical scenarios and user interaction);
  • The study of performance characteristics and trade-offs in the joint antenna-channel interactions, including novel MIMO antenna structures (e.g., pattern reconfigurable compact structures and multi-diversity structures) and arrangements, the modelling of nearfield objects, and use of coupling compensation techniques (e.g., matching networks);
  • Joint design with radio front-end, involving issues with noise, current consumptions, etc.
  • Theoretical limits on the number of antennas and obtainable performance for a small physical space;
  • Requirements related to the electromagnetic radiation e.g. SAR and maximum electric field – measurement methods and optimization;
  • Evolving requirements on the performance of both single and multiple antenna systems, including multiband, multistandard, wireless sensor networks (WSNs) and ultrawideband (UWB) applications;
  • New or improved antenna measurement techniques, such as the efficiency and pattern measurements for millimetre (mm) wave antennas;
  • Development of new metrics that may be better suited for multi-antenna system design and evaluation;
  • Antenna systems for new services e.g. DVB-H, where very large bandwidth are required for very small terminals and e.g., tunable antennas maybe the solution.

Aimed outcomes:

  • Models and tools for antenna systems performance analysis;
  • Examples of highly efficient antennas and antenna-systems for efficient communications.

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