Seminar : Radome impact (integration and efficiency) and outside condition effect (rain, …) on a millimeter wave radio link

Location : ENSTA Bretagne (Amphi 1)

Lecturer :Daniel BOURREAU

Abstract :

Millimeter waves up to THz are increasingly used or planned in various applications. Knowledge of the complex dielectric permittivity of materials is essential to achieve specifications in the design of devices and systems at these frequencies. Today, automotive radars operate in the Ka and W bands while future systems could operate in the D band (around 140 GHz). These radars are placed behind the car bumpers which results in signal interference and losses if its thickness is not optimized. The paint on the bumper has also an effect on the radar signal, as well as rain drops or water thin film on the bumper surface. This presentation gives an overview of dielectric characterization of unpainted (from Ka to J band) and painted slabs and non-solid materials such as powders and water in millimeter wave bands. It also presents experimental results and modelling in the W band of the electromagnetic response of a material subjected to a rain flow. We also present some results related to J-band developments for 5 and 6 G applications.