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WO/1993/009614A1 |
Beam Compensation Methods pertain to the management of radio beams (11) which are generated by a constellation of satellites (S). These beams (11) are precisely controlled so that they illuminate ''Earth-fixed cells'' as opposed to ''sat...
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WO/1993/009613A1 |
The disclosed satellite communication system comprises a dynamic constellation (C) of satellites (S). The system includes a number of low-earth orbiting spacecraft (S) which travel in orbital planes. Each of the individual spacecraft (S)...
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WO/1993/004510A1 |
A radar reflector comprises a pair of opposed colinear solid dielectric lens reflectors (10) and two corner reflectors (11) between to provide substantially uniform and high reflectivity in the plane of the reflector elements. Radar ener...
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WO/1993/003396A2 |
A vehicle navigation system including a millimetre wave radar system. Targets may be manufactured or natural, prominent, scene features. In the former case the target (3) is made selectively reflective to one of two orthogonal polarized ...
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WO/1993/001474A1 |
A device for gauging the level of a fluid in a container is described. It comprises a transmitter for transmitting a polarizable microwave signal through a first wageguide section, a receiver for receiving a reflected microwave signal, a...
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WO/1992/022846A2 |
This invention presents a process for the production of a lens with a given variable refraction index by fixing together several parts, at least some of them have a variable refraction index. The realization of the desired refraction ind...
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WO/1992/021790A1 |
Methods for fabricating two-dimensional imaged metal articles on webs by electroless deposition of metal onto a catalytic pattern rotogravurely printed onto moving webs travelling at linear speeds of up to 500 meters/minute using low vis...
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WO/1992/021993A1 |
An apparatus (10) for the selective transmission or reflection of incident electromagnetic radiation. The apparatus (10) comprises a plurality of dielectric substrates (12, 14, 16) combined so as to form a stack, wherein at least two of ...
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WO/1992/016031A1 |
The structure includes at least one substrate (2) of dielectric material, at least one face of which carries an orderly and geometrically periodic array of elements of electrically conductive material or, in a converse manner, bears at l...
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WO/1992/016032A1 |
Lenses (30, 60, 80) comprising chiral materials (40). The lenses (30, 60, 80) described herein will be particularly useful in optical and microwave systems and subsystems, monolithic microwave integrated circuits, integrated optical and ...
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WO/1992/015124A1 |
A dielectric resonator comprising a resonant defect structure (38) disposed in a lattice structure formed of a plurality of multi-dimensional periodically arranged dielectric elements (30) confines electromagnetic energy within a frequen...
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WO/1992/013373A1 |
The antenna system according to the invention includes a lens (11), which focusses incoming waves (10) at respective focal points (12a-c). Helical feeders (23a-c), which are provided near said focal points (12a-c) and preferably integrat...
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WO/1992/012549A1 |
Antenna structures and chiral radomes (210, 260, 270, 290) provide efficient and multipolarized antenna structures and radomes (210, 260, 270, 290). In a preferred embodiment, a radome (210, 260, 270, 290) for covering an antenna (230) c...
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WO/1992/011666A1 |
The invention refers to a reflector antenna where the reflector is composed by several separate panels (2). The panels may be individually adjustable in order to obtain a good surface accuracy. Thereby there must be narrow slots between ...
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WO/1992/009118A1 |
The discriminator comprises two substantially identical elements (A, B) of electrically conductive material lying in respective perpendicular planes, the distance between their centres being substantially equal to an odd number of quarte...
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WO/1992/008254A1 |
The invention presents a method for the fabrication or production of three-dimensional lenses with a variable refraction index by wrapping a material with a given refraction index. It is preferred, that this material has the shape of a t...
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WO/1992/002972A1 |
The invention relates to a radar reflector for use on yachts and the like, made up of five corner reflectors (11) each comprising three plates (12) welded along mutually orthogonal lines, each plate (12) comprising a right angled sector ...
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WO/1992/001319A1 |
A zone plate for focusing microwave energy is provided comprising a plurality of reflective portions (14a-d) corresponding to zones of said zone plate, each reflective portion reflecting energy lambda/P out of phase with respect to adjac...
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WO/1991/017587A1 |
A radar reflector structure is formed from a number of reflector elements (2, 3, 4). In use the reflector elements (2, 3, 4) are arranged in a non-planar configuration. The reflector elements are formed as laminates including a rigid cor...
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WO/1991/016735A1 |
A reflector device (3) may be mounted in a hollow housing (2) adapted to fly in ambient air. The reflector device (3) may be formed from a coating on the surfaces of blocks, the coating being metal or dielectric. Reflecting surfaces whet...
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WO/1991/009434A1 |
A balloon with an internal corner reflector for radio waves is built with the reflecting plane of the reflector freely suspended from a cord frame system which is only secured in the points of suspension. The reflector is suspended insid...
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WO/1991/008897A1 |
An article comprising a non-conductive substrate having a sub-micron thickness of an oxidizable metal coating thereon, and at least one feature selected from the group consisting of: (i) an oxidation enhancingly effective amount of a sal...
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WO/1991/008598A1 |
An antenna, which may be used for transmission or reception of electromagnetic radiation, comprises a dish (1) shaped reflector for collecting radiation when used as a receiver. The dish (1) is wholly or partially transparent to visible ...
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WO/1991/004589A1 |
Airborne craft and appliances of the kind having wings, envelopes, canopies, sails or the like composed of a flexible material which is inflated or shaped by air or gas pressure when in use, is made radar detectable by arranging that the...
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WO/1991/002390A1 |
A dual frequency feed assembly (10) employing a pair of coaxial circular waveguide cavities (15, 16), each with a respective probe (17, 20). The higher frequency cavity, e.g. Ku band, is located within the lower frequency, e.g. C band ca...
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WO/1990/014696A1 |
The present invention relates to an antenna apparatus for high frequency applications, essentially composed of feed antenna (15) and reflector (16) or lens (19) consisting of a frequency scanned grating which reflects or transmits the in...
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WO/1990/013926A1 |
A radar reflecting target comprises a plurality of reflecting elements (10) spread along at least one linear physical dimension of the target, the elements (10) being differingly spaced in the direction normal to said dimension so that r...
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WO/1990/013154A1 |
A dual frequency feed assembly (10) for antenna systems employing a pair of rotatably mounted probes (20, 33) each in respective coaxial (25, 14) cavities. The smaller cavity (25) is supported by the rotating means (32, 34, 35, 35A) for ...
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WO/1990/012430A1 |
An electromagnetic reflector comprises an array of pairs of panels (11) of electromagnetic reflecting material arranged about a central axis (x - x) with the panels of each pair perpendicular to one another and meeting along a linear joi...
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WO/1990/010958A1 |
An antenna horn is formed from a waveguide (2). This contains a ferrite rod (8) within a dielectric sleeve (12). A coil (16) is wound around the outside of the waveguide (2). The arrangement is such that the horn is selectably responsive...
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WO/1990/010318A1 |
A lightweight radar reflector comprising two converging lenses (21 and 22) with a reflecting surface (26) applied to the outer convex surface of one of the lenses. The lenses are preferably meniscus lenses provided with peripheral mating...
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WO/1990/007199A1 |
A focussing device for a microwave antenna comprises a zone plate(1) which is all transparent to visible light whereby the device can be used as a window without unduly adversely affecting the passage of visible light through the window.
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WO/1990/006665A1 |
The device relates to an antenna for producing a millimeter wave beam having a Gaussian distribution and using a high power source (1). In this antenna, partial mode convertors (2) are associated to said source (1) and intended to receiv...
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WO/1990/006002A1 |
In order to isolate microwaves of a selected polarization from incident microwaves collected by means of a dish reflector (10), a ferrite polarizer (16) is positioned at the focal point of the reflector. A ferrite body (26) of the polari...
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WO/1990/006004A1 |
An antenna for use in both C band and Ku band communications (3.65 GHz to 14.5 GHz) comprises a parabolic reflector (10) with support means (14) for mounting the antenna feed and/or receiver (13) offset relative to the aperture of the re...
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WO/1990/004319A1 |
A highly accurate circuit pattern (14) in intimate contiguous relationship with a curved plastic body (12) and a method of manufacture thereof. In accordance with the present invention, circuit pattern (14) is detachably fixed to a flexi...
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WO/1990/001813A1 |
An antenna comprises a feed means (1), and an inflatable structure (3) having focusing means (8, 9) arranged such that the feed means (1) is at the focus of the focusing means (8, 9) when the structure (3) is inflated. The inflatable str...
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WO/1990/001223A1 |
A millimetre wave antenna for television reception comprises an offset parabolic reflector (3) surrounded by an integral skirt (4), against which a feed-horn (7) may be located. The antenna may be moulded from plastics material using the...
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WO/1989/009500A1 |
A reflector (1) made up of reflector apparatus in the form of metal plates (2, 3) which comprise two substantially parallel boundary sheets (4) spaced apart and connected by a reflective core (5). At least one plate (2, 3) is cut away th...
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WO/1989/008932A1 |
An aerial for electromagnetic radiation comprises a lens (65) of dielectric material transparent to the radiation and having a dielectric constant substantially equal to 3.414. A convex surface portion is provided with a metallic layer (...
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WO/1989/007840A1 |
An array of reflectors of electromagnetic waves comprising a plurality of trihedral reflectors (10 to 17) arranged about a vertical axis (21) with each reflector orientated about its major axis (22) so that the plane bisecting the angle ...
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WO/1989/006338A1 |
A means of reflecting and emitting electromagnetic energy in an appropriate wavelength band comprising an arrangement (10) of surfaces (11) which are reflective to energy in that wavelength band and energy emitters (12) having an emissio...
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WO/1989/003444A1 |
A conductive non-woven fabric comprises fibres such as aluminium fibres blended with a bi-component polyester fibre or a combination of bi-component polyester fibre and polyester fibre into a bonded web. The web is particularly useful fo...
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WO/1989/002213A1 |
The invention concerns a process for producing an assembly of electrically conductive patterns (9, 16) on an intricate, electrically insulating surface (20). According to the invention: said assembly of patterns (16) is produced on one f...
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WO/1989/001708A1 |
Rear and forward reflector shells or dishes (36, 38) are independently supported on a dynamically rigid truss structure (12) by means of separate studs extending from the forward nodes of the truss to the two shells. Forward node (22) ca...
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WO/1989/001246A1 |
Substantially planar phase shifting elements, for example for use in antennas, may be constructed to deviate electromagnetic radiation in the frequency range 30 MHz-300 GHz. Phase shifting elements analogous to lenses, prisms and focussi...
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WO/1989/000773A1 |
A passive radar target comprises a solid lens (50) of substantially uniform dielectric constant, having a reflecting surface (51) integrally formed therewith, the lens being constructed of particulate material having a dielectric constan...
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WO/1989/000754A1 |
In a process for manufacturing a material having predetermined dielectric, pyroelectric and/or magnetic properties use is made of the fact that the electrical properties of mesoscopic particles (approximately 1 nm to 100 nm), for example...
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WO/1988/010521A1 |
Flat antennas such as Fresnel zone plates may be used to receive microwave signals. Such antennas are mounted on windows (4) and focus the signals on a horn feed (10). This invention discloses a flexible Fresnel zone plate (1) adapted to...
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WO/1988/010522A1 |
A non-furlable paraboloidal radio frequency reflector (10) is formed of a mesh-like flexible reflective surface (18) supported by a central hub (12) and a peripheral rim (14). The hub and rim are interconnected by flexible spoke-like str...
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