SATIMO

Pomezia, Italy
Pomezia, Italy
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Szini I.,University of Aalborg | Szini I.,Motorola Inc. | Pedersen G.F.,University of Aalborg | Scannavini A.,SATIMO | Foged L.J.,SATIMO
Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012 | Year: 2012

Long Term Evolution (LTE) adopt multi-antenna mechanisms to increase coverage and physical layer capacity, therefore Multiple Impute Multiple Output (MIMO) antenna systems are required on LTE systems. Besides the antenna system figure of merit (FoM), i.e. absolute system gain, gain imbalance, correlation coefficient the MIMO system performance is defined by radiated data throughput. Different standard bodies are working towards test methodologies to proper emulate the radio propagation environment therefore determining MIMO performance. This task had become very complex based on several implementation details pertinent of each test methodology. This paper will introduce the concept of MIMO 2×2 reference antenna for the special case of uniform incoming power distribution. Hereby part of measurement uncertainty is eliminated through the adoption of a set of MIMO 2×2 antennas with known FoM, and controllable performance. © 2012 IEEE.


Savelyev T.G.,Technical University of Delft | Zhuge X.,Technical University of Delft | Yarovoy A.G.,Technical University of Delft | Ligthart L.P.,Technical University of Delft | And 3 more authors.
European Microwave Week 2011: "Wave to the Future", EuMW 2011, Conference Proceedings - 8th European Radar Conference, EuRAD 2011 | Year: 2011

This paper describes development of an ultra-wideband through-wall imaging radar, which was carried out in the framework of the EU project PROBANT. The hand-held radar is intended for security and rescue operations. Its electronics is built on the frequency modulated continuous wave technology with flexible selection of operational frequencies within 1-4 GHz range. The antenna system represents a novel multiple input multiple output array with four transmit and eight receive antennas. The imaging is done by means of digital beamforming that uses a modified Kirchhoff migration. The capability to image a person through various walls, including thick reinforced concrete, has been demonstrated by experiments with an operational demonstrator. © 2011 European Microwave Assoc.


Araque Quijano J.L.,National University of Colombia | Foged L.J.,SATIMO | Vecchi G.,Polytechnic University of Turin
SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Proceedings | Year: 2013

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 process starting with the computation of surface equivalent sources which reproduce the actual antenna fields (with finite ground plane) in all points of space outside their support. These equivalent sources are then employed to compute the fields with infinite ground plane. Numerical results confirm the effectiveness of the technique. © 2013 IEEE.


Mioc F.,SATIMO | Sabbadini M.,European Space Agency | Frandsen P.E.,TICRA
2013 7th European Conference on Antennas and Propagation, EuCAP 2013 | Year: 2013

The paper presents the latest developments in the Electromagnetic Data Exchange (EDX). The EDX is a core activity of the EAML team in collaboration with the Working Group on Software of the European Association on Antennas and Propagation (EurAAP). The proposal for a common format for the exchange of mesh-related data is discussed together with an EDX example of meshed structures exchange including material information. © 2013 EurAAP.


Foged L.J.,SATIMO | Scannavini A.,SATIMO | Gross N.,SATIMO | Estrada J.,SATIMO
2013 7th European Conference on Antennas and Propagation, EuCAP 2013 | Year: 2013

In MIMO [Multiple Input Multiple Output] systems, the spatial correlation plays an important role. The level of correlation cannot be determined based on the antenna characteristics alone without knowing the propagation characteristics. When testing multiple antenna system is therefore necessary to include both the antenna and propagation characteristics in the system setup, thus the need of a new over-the-air (OTA) testing methodology. The MIMO OTA anechoic chamber based approach, emulates complex spatial-temporal propagation environments at the device location in a realistic and repeatable way by using a radio channel emulators connected to a circular array of probes (multiple clusters) or an array of probes on one side (single cluster) of the chamber. © 2013 EurAAP.


Euphrasie S.,University of Franche Comte | Zhang S.,University of Franche Comte | Butet R.,SATIMO | Vairac P.,University of Franche Comte
Applied Physics Letters | Year: 2013

We propose a sensor system to measure the specific absorption rate at radio frequencies, using a matrix of electro-optic (EO) sensors. The aim is to replace the conventional metallic antenna scanned by a robot inside an open phantom with a matrix of small probes positioned inside a closed phantom. Results are presented for a dual sensor, showing the feasibility of the proposed approach. The two EO probes interrogated by the same laser are shown to detect electric fields smaller than 1 V/m. Measurements are conducted both with the probes in air and inside the phantom liquid. © 2013 American Institute of Physics.


Vandenbosch G.A.E.,Catholic University of Leuven | Mioc F.,SATIMO
Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012 | Year: 2012

The convened session at EuCAP last year of the EuRAAP Working Group on software should be considered a starting-up event. It was the first time that the WG established a really close cooperation with software vendors in a mutual effort. The goal was to discuss the future of computational electromagnetics. This year, the immediate goal is to organize a session with time reserved for discussion between the antenna and propagation software and design research community and the software vendors. The idea is to figure out whether it would be possible to establish a kind of common road map, in mutual consent, for the further development of numerical techniques and software tools. The goal is explicitly that the input for this road map is coming from the antenna and propagation software and designer community, which is the community that should drive the development, since they are the final "customers" of the software. © 2012 IEEE.


Giacomini A.,SATIMO | Potenza A.,SATIMO | Morbidini R.,SATIMO | Foged L.,SATIMO
Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012 | Year: 2012

Ridge horn have been utilized in antenna test ranges for different measurement applications for many years. These horns offer stable performance on a bandwidth that can exceed 16:1 as reported in [1-2]. The quad-ridge horn offer dual polarization in the same horn but often at the expense of bandwidth [1]. The open boundary horn concept investigated in [3] is preferred since it avoid the frequency dependent influence of the horn walls that often lead to pattern deformation. The design task is often a compromise between pattern shape, matching and polarization purity but also mechanical issues needs to be considered to arrive at a robust design with repeatable and stable performance. This paper describes the design of a 2-32GHz dual polarized quad ridge horn with a 16:1 bandwidth with high polarization purity. © 2012 IEEE.


Mioc F.,SATIMO | Frandsen P.E.,TICRA | Sabbadini M.,European Space Agency
Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012 | Year: 2012

This paper presents an overview of the last developments in the Electromagnetic Data Exchange (EDX). The EDX is a core activity of the EAML team in collaboration with the Working Group on Software of the European Association on Antennas and Propagation (EurAAP). Recent developments are discussed together with the formulation of the Field Data Dictionary in the DDL language. An application example relevant to the integration of measurements and simulation is reported. © 2012 IEEE.


Patent
European Commission, Technical University of Delft and Satimo | Date: 2011-04-27

A radar transducer array (12) for an ultra-wideband imaging radar system (10) operating at a reference wavelength _(c) comprises transmission antenna elements (14) or reception antenna elements and reception antenna elements (16), which are located at specific locations of the array plane in such a way that high image quality is achieved with a minimum number of antenna elements (14, 16), resulting in less complex hardware as well as significantly reduced computational effort.

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