Comparative Study of Multi Port Antennay for full Isotropic Dual Polarisation Coverage
M. HUCHARD, C. DELAVEAUD, S. TEDJINI
Proc. ‘EuCAP 2006’, Nice, France
1st January 0001
New wireless applications such as sensor network or motion tracking systems require reliable transmission performances whatever the orientations of the devices with respect to each other. Multi port antennas can greatly improve performances in this context. This paper presents a novel method for evaluation of the isotropic coverage of such multi antenna systems. Our approach is well adapted for applications where devices communicate in line of sight over short distances, that is to say when direct path is predominant over indirect multipath. Based on this method, we present a comparative study of four canonical colocalized multi antennas and we shows that a combination of U-shaped bended crossed dipoles achieve full isotropic dual polarization coverage with nearly the same performance as a commonly used arrangement of three orthogonal dipoles.
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