Abstract: A self-calibrating device for measuring intracorporeal pressure, includes: A pressure sensor having i) a test body (11) of which a segment of smaller thickness constitutes a membrane that can deform under the action of the pressure of the medium, the membrane being equipped with at least one piezoelectric transducer that can translate a mechanical stress into an electrical signal, and ii) a polarization contact, An actuator that is connected to a voltage source, having a non-deformable base, whereby at least one surface of the actuator is polarizable, the pressure sensor being placed above the actuator so that the membrane is in vertical alignment with the polarizable surface (22).

Abstract: The invention has as its object a self-calibrating device for measuring intracorporeal pressure, comprising: A pressure sensor that comprises i) a test body (11) of which a segment of smaller thickness constitutes a membrane that can deform under the action of the pressure of the medium, whereby said membrane is equipped with at least one piezoelectric transducer that can translate a mechanical stress into an electrical signal, and ii) a polarization contact, An actuator that is connected to a voltage source, comprising a non-deformable base, whereby at least one surface of said actuator is polarizable, and whereby said pressure sensor is placed above said actuator so that the membrane is directly at the base of the polarizable surface (22). Preferably, said pressure sensor comprises four doped-silicon piezoresistive gauges, integrated into the zones of greater deformation of a silicon membrane.

Abstract: An electromagnetic lens comprises two conductive sides between which there is arranged a cavity provided in its lateral portion with electromagnetic input/output coupling transitions to authorize a set of propagation laws between pairs of such inputs/outputs. Moreover, it comprises, substantially centered in the cavity, a substrate comprising a printed conductive patch of predetermined dimensions, so that the two conductive sides and the patch thus create a suspended three-plate strip line structure. The content of the cavity and the respective geometries of the cavity and of the conductive patch are chosen to comply with the propagation laws.

Abstract: A two-directional network antenna includes N parallel and juxtaposed arrays of antenna elements respectively connected to electronic transmission/receiving circuits by an ultrahigh frequency connecting device with phase shifts controlled by a control device. The ultrahigh frequency connecting device comprises N transmission lines respectively associated with N arrays of antenna elements, each transmission line having outputs in propagation lengths which are staggered in relation to their input, which outputs are connected to respective antenna elements of the associated array. The ultrahigh frequency connecting device further comprises at least one electromagnetic lens with P inputs and N outputs respectively connected to N inputs of the transmission lines.