Leaky wave antenna in AFSIW technology

    公开(公告)号:US11515637B2

    公开(公告)日:2022-11-29

    申请号:US17125757

    申请日:2020-12-17

    Abstract: Leaky wave antenna of AFSIW structure comprising a top substrate layer and a bottom substrate layer sandwiching an intermediate layer comprising a longitudinal aperture of length L defining a waveguide and whose width W1 is delimited by two conductive lateral walls. The inner faces of the conductive lateral walls are coated with a layer of dielectric material of thickness w(z). The top layer has a longitudinal radiating slot of width Wf (z) facing the longitudinal aperture of the intermediate layer. The thickness w(z) of the dielectric coating varies along the longitudinal axis z according to a given law, defined so as to obtain variations along the axis z of the amplitude Alpha(z) and of the phase Beta(z) of the leaky wave of the guide.

    DEVICE AND METHOD FOR DETERMINING CHARACTERISTIC PARAMETERS OF THE DIMENSIONS OF NANOPARTICLES

    公开(公告)号:US20210063296A1

    公开(公告)日:2021-03-04

    申请号:US17001825

    申请日:2020-08-25

    Abstract: According to one aspect, the subject of the present description is a device (100) for determining characteristic parameters of the dimensions of nanoparticles in suspension in a liquid. The device (100) comprises light-emitting means (101) configured to emit an incident light beam (Bi) that is linearly polarized along a polarization axis (P1); a detecting unit (102) comprising a measurement arm (120) that is rotatable with respect to an axis of rotation (Δ), said detecting unit comprising first and second detection channels (151, 161) that are separated by a polarization-splitting element (125) arranged in said measurement arm; a fixed sample holder (103), configured to receive a container (10) of cylindrical symmetry of said sample, an axis of symmetry of the container being coincident with the axis of rotation of the measurement arm; and a control unit (104). The polarization-splitting element (125) of the measurement arm is configured to simultaneously send, over each of the first and second detection channels, respectively, a first and second polarized component (BS1, BS2) of the beam (BS) scattered by the sample, the polarization axes of the first and second polarized components being perpendicular.
    The control unit (104) is configured to determine, from signals corresponding to the polarized components detected in each of the detection channels as a function of time, at least two characteristic parameters of the dimensions of the nanoparticles.

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