Improvement of shadowing with iterative physical optics for radiation pattern of mounted antennas

Antoine Thomet (1) , Gildas Kubicke (2) , Christophe Bourlier (1) , Philippe Pouliguen (3)

1 IETR - Institut d'Électronique et des Technologies du numéRique
2 DGA.MI - DGA Maîtrise de l'information
3 DGA MRIS - DGA Mission Recherche et Innovation Scientifique

Modeling interactions between antennas and structures is an important challenge for systems carrying antennas such as aircrafts, satellites, frigates. This paper focuses on the electromagnetic field propagated by an antenna interacting with a structure that includes effects of shadowing and multiple reflections. In such a case, several method can be used, and Iterative Physical Optics (IPO) is an asymptotic method based on Physical Optics (PO), which has shown good results in calculation of electromagnetic diffraction in open-ended cavities. In IPO, different techniques can be used to take into account shadowing effects. First method, classically used, is a geometrical way of considering shadowing, based on ray bouncing. A more recent method uses a physical approach, based on shadow radiation (around forward direction) with PO approximation. The idea of this paper is to use IPO method to determine electromagnetic field from a structure including an antenna on a large complex platform, comparing different ways of considering shadowing effect.

Mots clés: Antenna radiation patterns; Carried antennas; Physical Optics; Geometrical Optics; Forward scattering; Shadow radiation; Iterative Physical Optics

Domaines: Electromagnétisme

Antoine Thomet, Gildas Kubicke, Christophe Bourlier, Philippe Pouliguen. Improvement of shadowing with iterative physical optics for radiation pattern of mounted antennas. 16th International symposium on ANtenna Technology and applied ElectroMagnetics (ANTEM 2014), Jul 2014, Victoria (BC), Canada. pp.1 - 2 ⟨10.1109/ANTEM.2014.6887701⟩. ⟨hal-00967937⟩