Design of a planetary protection cover for EMC testing of a spacial magnetic sensor

This paper explains the research process carried out for the development and manufacture of the planetary protection cover for carrying out the electromagnetic compatibility (EMC) tests of the an-isotropic magneto-resistance (AMR) sensor of the ExoMars 2020 mission. This mission has strict bioburden requirements. The electromagnetic properties of several materials have been analyzed in order to study their transmission coefficient and the innovation of this project is the use of fused deposition modeling (FDM) technology as manufacturing method. Additive manufacturing is presented as a promising technology in the field of radiofrequency since it can use a wide range of polymeric materials (thermoplastics) with low transmission coefficient. Observing the electromagnetic (EM) characterization results, it was decided to manufacture a protective cover using FDM technology, because it allows control over the grounding of the instrument and facilitates the integration, cleaning and protection against impacts during the manipulation, with great versatility and low cost. Finally, the cover has been verified during the acceptance EMC tests of the flight model AMR instrument.

[1]  Frank Weinmann,et al.  Comparison of Metal-Backed Free-Space and Open-Ended Coaxial Probe Techniques for the Dielectric Characterization of Aeronautical Composites † , 2016, Sensors.

[2]  David W. Rosen,et al.  Additive Manufacturing Technologies: Rapid Prototyping to Direct Digital Manufacturing , 2009 .

[3]  V. Varadan,et al.  A free-space method for measurement of dielectric constants and loss tangents at microwave frequencies , 1989 .

[4]  pLuciano Fratocchip,et al.  Additive manufacturing technologies as a reshoring enabler , 2019 .

[5]  D Escot,et al.  Indoor 3D Full Polarimetric Bistatic Spherical Facility for Electromagnetic Tests , 2010, IEEE Antennas and Propagation Magazine.

[6]  A. Kashani,et al.  Additive manufacturing (3D printing): A review of materials, methods, applications and challenges , 2018, Composites Part B: Engineering.

[7]  Omar Ahmed Mohamed,et al.  Optimization of fused deposition modeling process parameters: a review of current research and future prospects , 2015, Advances in Manufacturing.

[8]  Hari Singh Nalwa,et al.  Handbook of Low and High Dielectric Constant Materials and Their Applications , 1999 .

[9]  Maurizio Bozzi,et al.  Characterization of 3D-printed dielectric substrates with different infill for microwave applications , 2016, 2016 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP).

[10]  Pascale Ehrenfreund,et al.  Overview of current capabilities and research and technology developments for planetary protection , 2014 .

[11]  K. Satish Prakash,et al.  Additive Manufacturing Techniques in Manufacturing -An Overview , 2018 .