To cite this version:Patrice Pajusco, François Gallée, Nadine Malhouroux-Gaffet, Roxana Burghelea. Abstract-In this paper, a prototype of a dual-polarized array antenna is presented. This array was designed in the framework of a collaborative project on spatial modulation schemes. It will be used for the project testbed and for space-time channel measurements. This array features several novelties, including a slant uniform planar structure, a scalable design with integrated switching circuitry, a reference antenna and a camera. The array has been successfully used with a wideband channel sounder to provide real-time radio photos.Index Terms-antenna array, channel sounding, direction of arrival, massive MIMO.
In ultra-wide band (UWB) propagation channel modelling, antenna effects -namely frequency and polarisation aspects -must be considered to provide realistic waveform characteristics and realistic signal received power. The authors propose an efficient method which enables ultra-compact parametric modelling of fully three-dimensional antenna radiation behaviour for UWB ray tracing channel simulation tools. Two complementary techniques based on a vector spherical harmonic (VSH) expansion of antenna radiation function are proposed as a solution for (i) compression of the amount of data needed for describing antenna characteristics and (ii) fast and reliable reconstruction of antenna array response for waves coming from arbitrary directions and with arbitrary frequency variations. The most significant VSH coefficients are first extracted and then compressed in the frequency domain. The method is evaluated through the study of an UWB monocone antenna. It is shown that data compression rates as high as 1:1719 are achievable in practice.
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