Study of Excitation on Beam Ports versus Element Ports in Performance Evaluation of Diversity and MIMO Arrays

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 5Language: englishTyp: PDF

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Jamaly, Nima; Kildal, Per-Simon; Carlsson, Jan; Wolfgang, Andreas (Antenna Group, Chalmers University of Technology, Gothenburg, Sweden)
Gómez-Calero, Carlos (Radiation Group, Universidad Politécnica de Madrid, Madrid, Spain)

The main concern of the current communication is to elicit the influences of beam-forming upon different Multiple-Input Multiple-Output (MIMO) parameters in a rich scattering environment. A detailed study of desired parameters is presented with particular stress on total radiation efficiencies observed on Element ports and Beam ports. Measurements are performed in a Reverberation Chamber (RC). The results illustrate that performance as viewed through Element and Beam ports are, in general, equal. Hence, they confirm that in a rich and isotropic scattering environment, beam-forming technique does not prove beneficial. They also demonstrate that as long as received radiation power is preserved, the shapes of the elements’ patterns are irrelevant.