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The multiplexing efficiency of high order MIMO in mobile terminal at 15GHz for 5G communication is studied in this paper. The multiplexing efficiency of two MIMO topologies are compared is calculated with a narrow angular spread Gaussian distributed incoming wave model in order to illustrate the mm wave channel characterize.
The multi-probe anechoic chamber measurement methodology (MPAC) for quantifying the MIMO OTA performances of multiple antennas wireless terminals is described in [1-2-3-4] and is designed for emulating the spatial characteristics of the propagation models defined in [5]. This testing methodology has been currently the only approved by CTIA for measuring radiated performances of MIMO (TM3) wireless...
The latest study of the millimeter wave (mmWave) phased array in user device (UE) for 5G communication is presented in this paper. Particularly, the body effect on the phased array in a UE/mobile terminal at 15 GHz is investigated with the 3D measured data. Its impact on the recently introduced parameter for phased array in mobile terminal, the total scanning pattern, body loss and the coverage efficiency,...
This paper presents a comparison between two different echo reduction techniques applied to one-single cut antenna measurements. These techniques are based on modal filtering and time filtering. The first technique uses a post-processing of the far field one-single cut so as to obtain a modal expansion of cylindrical modes and to cancel the effect of spurious signals. The second one is based on filtering...
Different research groups have been working during the last years in different echo reduction techniques applied to antenna measurements, based on spatial, modal or time filtering. Some applications where these methods are usually employed are: outdoor systems, for HF or VHF frequency systems or for small measurement systems where the anechoic material is only placed in front of the AUT. This paper...
The Active Antenna System (AAS) is receiving an increased attention for the upcoming 5G cellular networks. The actual measurement AAS antennas require new thinking in active antenna measurement. This paper describes a new measurement approach based on NF antenna measurements techniques to determine directional dependent performance parameters such as EIRP and EIS and their derived performance parameters...
The ground-based automatic identification system (AIS) is a coastal tracking and messaging system used by vessels for maritime traffic monitoring. The European SAT-AIS initiative aims at providing a space-based complementary system to extend the range of the existing AIS to high seas via very high frequency (VHF) satellite constellation. The AIS Miniaturized Antenna (AISMAN) activity concentrates...
The paper presents how the effect of the coax cable can be resolved when testing electrically small antennas in a multi-probe antenna measurement system [1]. The MVG StarLab15 system setup was used for such testing activity. It was equipped with a fiber optic to RF transducer which was directly connected to the AUT (Antenna under Test). The StarLab15 was validated in terms of its system performances...
In the frame of ESA program AO/1-6737/11/NL/MH, an innovative X-band antenna system for satellite avionics has been studied, demonstrated and validated at Proof of Concept Model level. The innovative contribution of such an antenna system relies on modularity, customizability and accommodation friendliness. The antenna concept is based on a Plug and Play architecture, where the basic module is a 2...
A fast spherical near-field to far-field transformation using single cuts is introduced in this paper. It is based on calculating the Cylindrical Modal Coefficients of each individual near-field ring and processing them independently, considering them as cylinders of zero height and applying probe correction. The reconstruction of each far-field cut is obtained through an inverse Fast Fourier Transform...
We present a numerical technique to compute the field due to antennas above an infinite ground plane starting from measurements with finite ground planes. The technique works under the assumption of weak coupling between the antenna and the finite plane discontinuities but is otherwise general since it is based on rigorous field symmetry relations. Application of the technique requires a two-step...
This paper describes joint efforts undertaken by Penn State University Applied Research Laboratory, the National Institute of Standards, and the Microwave Vision Group, which includes ORBIT/FR Inc. and Satimo. The purpose of this research was to characterize a selected certification method for the performance of the test zone in a large anechoic chamber. The Applied Research Laboratory's chamber in...
Many UWB antennas have been developed for the emerging wireless communications and radio positioning applications. However, how to measure these antennas accurately and efficiently (especially for the radiation pattern, gain and efficiency) over the broad frequency band is a challenging task. In this paper, we report some recent findings obtained by three organisations using different facilities to...
This paper gives an overview of a technique being investigated in 3GPP and COST2100 for measuring Over the Air (OTA) performances of a multi antenna terminals, and Multi-input Multi-output (MIMO) systems in a controlled environment, such as an anechoic chamber. The Spatial Fading Emulation technique employs the use of an anechoic chamber, a channel emulator, and a mapping of geometry based stochastic...
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