An object struck discrimination system for a vehicle is provided which is effective in increasing the discrimination accuracy for discriminating an object struck by the vehicle. The first voltage is higher than a power source voltage supplied to the regulator. The device being formed by forming conformal coplanar waveguide metallizations on surface areas of two substrates, connecting the conformal coplanar waveguide metallizations of the two substrates, and structured back-etching of the two substrates, starting at surface areas of the two substrates that are opposite the coplanar waveguide metallizations.