Interferometer-Radiometer

TUNABLE PHASE SHIFTER AND/OR DULL/MUSTY MEMBER

SUB-MILLIMETRE WAVELENGTH CAMERA

The invention relates to an imaging device to be used with millimeter and/or sub-millimeter radiation comprising at least a pair of substrates, at least one of which is patterned on at least one surface with a patterning defining at least one radiation detector (4), each radiation detector comprising:- an antenna (14) adapted to receive millimetre and/or sub-millimeter electromagnetic radiation, - a mixer channel (16) coupled to said antenna and in communication with a via extending through a substrate for connection to a signal output, a mixer comprising filters (15, 19) being mounted in the mixer channel for extracting an intermediate frequency signal in dependence upon said radiation received by the antenna. - a waveguide structure (17) coupled to said mixer and having a signal input for connection to a local oscillator. © KIPO & WIPO 2007 ...

INTERFEROMETER RADIOMETER

CAMERA FOR SUBMILLIMETRE WAVES

INTERFEROMETRIC RADIOMETER

INTERFEROMETRIC RADIOMETER

Radiomètre interférométrique embarqué sur un véhicule spatial destiné à l'imagerie d'une émission de rayonnement d'une scène cible (ED), comprenant: - une pluralité d'éléments récepteurs agencés sous forme d'un réseau bidimensionnel ou tridimensionnel (REA) ; - des premiers moyens de traitement du signal (SP1) pour calculer un ensemble bidimensionnel d'échantillons d'une fonction de visibilité par corrélation croisée par paire des signaux reçus par lesdits éléments récepteurs ; et - des seconds moyens de traitement du signal (SP2) pour reconstruire une image à partir desdits échantillons de ladite fonction de visibilité ; caractérisé en ce qu'il comprend en outre des moyens (ROT) de rotation dudit réseau bidimensionnel ou tridimensionnel (REA) autour d'un axe de rotation (z) qui est sensiblement dirigé vers ladite scène cible (ED) ; et en ce que lesdits seconds moyens de traitement du signal (SP2) sont adaptés pour reconstruire ladite image à partir d'une pluralité d'ensembles bidimensionnels ...

PERIODIC DIELECTRIC STRUCTURE OF THE TYPE HAS THREE-DIMENSIONAL PHOTONIC FORBIDDEN BAND AND ITS MANUFACTORING PROCESS

L'invention concerne une structure cristalline (5), du type dit à bande interdite photonique tridimensionnelle, ainsi que son procédé de fabrication. Elle comprend un empilement constitué de deux séries de couches alternées (30, 31) en des matériaux distincts associés à des première et deuxième constantes diélectriques, qui forment un bloc (3) sensiblement parallélépipédique rectangle. Une pluralité de canaux parallèles (4) sont formés à travers le bloc (3) dans une direction orthogonale aux faces principales des couches, suivant une configuration de réseau de mailles à deux dimensions. Les canaux sont constitués en un matériau présentant une troisième constante diélectrique. Il s'agit préférentiellement de trous remplis d'air. On obtient ainsi la bande interdite photonique tridimensionnelle souhaitée dans une gamme de fréquences prédéterminée.

KAMERA FÜR SUBMILLIMETERWELLEN

Tuneable phase shfter and/or attenuator

The invention relates to a tuneable phase shifter and/or attenuator comprising a waveguide having a channel and a piece of photo-responsive material ( 18 ) disposed within the waveguide along an internal wall of said channel, a light source disposed outside the waveguide to emit light through an aperture ( 30 ) of said internal wall to impinge on at least part of an outside surface of said piece of photo-responsive material ( 18 ).

Sub-millimeter wavelength camera

The invention relates to an imaging device to be used with millimeter and/or sub-millimeter radiation comprising at least a pair of substrates, at least one of which is patterned on at least one surface with a patterning defining at least one radiation detector, each radiation detector comprising: an antenna adapted to receive millimeter and/or sub-millimeter electromagnetic radiation, a mixer channel coupled to said antenna and in communication with a via extending through a substrate for connection to a signal output, a mixer comprising filters being mounted in the mixer channel for extracting an intermediate frequency signal in dependence upon said radiation received by the antenna, a waveguide structure coupled to said mixer and having a signal input for connection to a local oscillator.

Interferometric radiometer

A space-borne interferometric radiometer for imaging a radiation emission from a target scene (ED), comprising: a plurality of receiving elements arranged in a two- or three-dimensional array (REA); first signal processing means (SP 1 ) for computing a two-dimensional set of samples of a visibility function by pair-wise cross-correlating signals received by said receiving elements; and second signal processing means (SP 2 ) for reconstructing an image from said samples of said visibility function; characterized in that it further comprises means (ROT) for rotating said two- or three-dimensional array (REA) about a rotation axis (z) which is substantially directed toward said target scene (ED); and in that said second signal processing means (SP 2 ) are adapted for reconstructing said image from a plurality of two-dimensional sets of samples of said visibility function corresponding to different rotational positions of said rotating two- or three-dimensional array (REA) of receiving elements ...

TUNEABLE PHASE SHIFTER AND/OR ATTENUATOR

The invention relates to a tuneable phase shifter and/or attenuator comprising a waveguide having a channel and a piece of photo-responsive material (18) disposed within the waveguide along an internal wall of said channel, a light source disposed outside the waveguide to emit light through an aperture (30) of said internal wall to impinge on at least part of an outside surface of said piece of photo-responsive material (18). © KIPO & WIPO 2007 ...

KAMERA FÜR SUBMILLIMETERWELLEN

Tuneable phase shfter and/or attenuator for introducing electromagnetic wave

Interferometric radiometer

A space-borne interferometric radiometer for imaging a radiation emission from a target scene (ED), comprising a plurality of receiving elements arranged in a two- or three-dimensional array (REA), a first signal processor (SP1) for computing a two-dimensional set of samples of a visibility function by pair-wise cross-correlating signals received by the receiving elements; and second signal processor (SP2) for reconstructing an image from the samples of the visibility function. The radiometer is further characterized in that it has the ability for rotating the two- or three-dimensional array (REA) about a rotation axis (z) which is substantially directed toward the target scene (ED) and in that the second signal processor (SP2) is adapted for reconstructing the image from a plurality of two-dimensional sets of samples of the visibility function corresponding to different rotational positions of the rotating two- or three-dimensional array (REA) of receiving elements.

ABSTIMMBARES PHASENSCHIEBER- UND/ODER DuMPFUNGSGLIED

Periodic dielectric structure of the three-dimensional photonic band gap type and method for its manufacture

The present invention relates to a crystal structure with three-dimensional photonic band gap which comprises a pile of alternate series of layers of distinct dielectric materials having a first and a second determined dielectric constant values, wherein said layers have a constant determined thickness and said pile forms a substantially rectangular parallelepipedal block, and a plurality of parallel channels provided through said block along a direction orthogonal to the main faces of said layers. Said channels are distributed according a two-dimensional lattice pattern and have a third determined dielectric constant value. The values for the dielectric constants as well as the relative geometric dimensions of said layers and said channels are selected so as to obtain said three-dimensional photonic band gap in a predetermined frequency range. The crystal structure is especially for use as an antenna substrate.

TUNABLE PHASE SHIFTER AND/OR ATTENUATOR

PROBLEM TO BE SOLVED: To provide a tunable phase shifter and/or attenuator capable of operating at microwave, millimetric and/or sub-millimetric wavelengths with an improved tunability. SOLUTION: The tunable phase shifter and/or attenuator includes: a waveguide having a channel and a piece of photo-responsive material disposed within the waveguide from an internal wall of the channel at an interval, a light source to emit light so as to impinge on at least a part of the photo-responsive material, the light source generates in the photo-responsive material a carrier concentration between 1012 cm-3 and 1016 cm-3 so as to modify the real and the imaginary part of the dielectric constant of the photo-responsive material to generate at least one mode that has a part of its field inside the photo-responsive material layer and a part of its field in the waveguide whereby the phase shifter and/or attenuator that is dependant on the light illumination is generated over a frequency range. COPYRIGHT ...

Tuneable phase shifter and/or attenuator using photoresponsive-material in a waveguide

The invention relates to a tuneable phase shifter and/or attenuator comprising a waveguide having a channel and a piece of photo-responsive material ( 18 ) disposed within the waveguide along an internal wall of said channel, a light source disposed outside the waveguide to emit light through an aperture ( 30 ) of said internal wall to impinge on at least part of an outside surface of said piece of photo-responsive material ( 18 ).

Sub-millimeter wavelength camera

Interferometric Radiometer

The radiometer has a signal processing unit (SP1) calculating a bi-dimensional sample group of a radiation emission visibility function by cross correlation of signals received by receiving elements. Another signal processing unit (SP2) reconstructs an intensity image of the emission from the group. A rotation unit (ROT) rotates a bi-dimensional or three-dimensional network (REA) around rotation axis (Z) directed towards a terrestrial disc. The unit (SP2) reconstructs the image from a set of bi-dimensional sample groups. Each group corresponds to an angular position different from the network.

Tuneable phase shifter and/or attenuator

Abstimmbares phasenschieber- und/oder dumpfungsglied

Interferometer-radiometer

Kamera für submillimeterwellen