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The use of FFT-based measuring receivers for EMI compliance measurements is motivated by the desire to reduce the scan time by several orders of magnitude and to gain additional insights by applying longer measurement times or using enhanced methods like scan spectrogram and persistence mode. Usage of an appropriate measurement time is the key to comprehensively record the disturbance characteristic...
The interaction of a space system with its orbital environment is a major consideration in the design of any space system, since a variety of hazards are associated with the operation of spacecraft in the harsh space environment. The COSMO second generation satellites cross the Low Earth Orbit (LEO) that is usually considered less hazardous than high altitude geosynchronous (GEO) satellites, except...
Understanding the impact of interference upon the performance of a multiple input multiple output (MIMO) based device is of paramount importance in ensuring a design is both resilient and robust. In this work the effect of element-element interference in the creation of multiple channels of a wireless link approaching the near-field regime is studied. The elements of the 2-antenna transmit- and receive-arrays...
A study has been done to assess the feasibility of metallization of Silicon Carbide (SiC) in order to simplify design and mounting of one or more ground reference rail needed to provide an electrical reference for electronics mounted on an SiC structure.
Signal integrity (SI) is always a concern when it comes to high-speed data transmission. Even in space, there is a need for high-speed data transmission such as in the communication systems, monitoring various subsystems and for other on-board experiments and applications. From Electromagnetic Compatibility (EMC) perspective, using fiber-optic interconnect is highly recommended to avoid interference...
Turbulence Heating ObserveR (THOR) is a spacecraft mission dedicated to the study of plasma turbulence in near-Earth space. The mission is currently under study for implementation as a part of ESA Cosmic Vision program. THOR will involve a single spinning spacecraft equipped with state of the art instruments capable of sensitive measurements of electromagnetic fields and plasma particles. The sensitive...
To control the radiated emission of high-speed link and associated unit, the current approach is to implement overall harness shielding on cables bundles. This method is very efficient in the HF/ VHF (high frequency/ very high frequency) and UHF (ultra-high frequency) ranges when the overall harness shielding is properly bonded on EMC back-shell. Unfortunately, with the increasing frequency, the associated...
Static charging of an aircraft surface can lead to electromagnetic disturbances on aircraft radio and avionic systems. This phenomenon is called Precipitation Static. Arc discharges are the main causes, and they often occur when there is a bonding defect on the surface of the aircraft. This paper presents a method that aims at reducing the time needed for the search of outer bonding issues. The system...
A multiconductor transmission line model (MTL) is used to investigate the operation of the IEC 61000-4-6 electromagnetic (EM) clamp in a conducted-immunity test setup for aerospace applications. Aspects of interest include the performance of such a coupling device at very high frequencies (up to 1 GHz), and for extreme values of the common-mode impedance of equipment (short circuits, open circuits)...
INTA EMC Area has a wide experience in performing Radiated Susceptibility (RS) tests according to civilian, military and aeronautical standards in Mode Tuned Chambers (MTC) for national and international projects; besides, INTA has two Thermal Vacuum Chamber (TVC) facilities in service for Space Systems tests. In order to perform RS tests to Space Systems in a more realistic environment, INTA EMC...
In this work, basic principles of an alternative test procedure exploiting crosstalk to reproduce in the terminal loads of a wiring structure the same disturbances that would be induced by traditional radiated susceptibility (RS) tests are presented. Equivalence with radiation is achieved by the use of a generator circuit properly fed with two synchronized RF generators, and holds for whatever loads...
This paper presents EMC measurements from the ‘Planetary ion camera’ (PICAM) instrument, a part of the SERENA instrument suite aboard BepiColombo, an ESA/JAXA two spacecraft mission to the Hermean system. After a short description of the scientific goals and PICAM characteristics, we focus on results obtained by the QM and FM. For the electronics boards and the ion optics conducted emission and susceptibility...
Today the electronic embedded architecture in aircraft is based on traditional approaches on the independent aircraft systems with modules called LRU, Line Replaceable Unit. Needs to reduce cost and weight of the embedded electronic units pass by the implementation of a more modular electronics in the architectures AC with elementary module. Such EMC avionic tests description at electronics modules...
This paper presents a compact system for the measurement of electromagnetic interferences in the time domain. The measurement system is based on a USB oscilloscope, used as digitizer, and specific software for signal processing and spectral estimation. The measurement system is suitable for both conducted and radiated electromagnetic emissions up to 200 MHz. Its accuracy, precision and dynamic range...
Satellite equipment needs to be immune to electrostatic discharges (ESD) likely to occur in flight. Testing the susceptibility against ESD on spacecraft equipment is therefore an important part of the EMC test program. The test method according to ECSS-E-ST-20-07C [1], which is commonly used in space industry, leaves undesirable degrees of freedom on how the test is performed, which in turn has an...
This paper shows encouraging experimental and numerical results on the possibility to use a Stripline injection probe for BCI-like tests on multiconductor transmission lines. The aim of these results is to prove that larger apertures made on both sides of the cell in order to let more wires cross the structure does not question the functioning of the probe itself.
The well-established calibration techniques for loop antennas have in common that either some parts of the antenna design or the field pattern of a standard field must be well known or fully theoretically describable. In this paper a pure metrological approach, circumventing these requirements is introduced and verified. It is based on a generic two port network model for loop antennas and a traceable...
The 100BASE-T1protocol is an Ethernet protocol allowing communications at 100 Mb/s on a single unshielded twisted pair cable. It was defined by the OPEN Alliance[1] working group that mainly comprised automobile manufacturers and suppliers, and therefore is specified for short cable lengths up to 15m. The technology originates from Broadcom who markets it as BroadR-Reach. It is of interest to the...
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