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WO/1996/017403A1 |
The present invention is a double-reflector microwave antenna (fig. 1), which can be classified as belonging to the Gregorian optics family, capable to provide an elliptical beam with a major axis which can be oriented in any required di...
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WO/1996/016452A1 |
An antenna/downconverter (34) directed to the subscription television distribution industry having low cross polarization and broad bandwidth. The antenna/downconverter (34) includes a director (40) mounted to a housing (38) which define...
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WO/1996/010849A1 |
A directional antenna comprising a rectangular loop antenna body (1) having a short side (2B) and a long side (2A) that is 2 to 3 times longer than the short side and equivalent to a 1/2 wavelength; and a pair of rectangular reflecting p...
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WO/1995/033515A1 |
In order to provide a device for the control of oscillating electromagnetic fields, in particular those from mobile radio transmitters, so that detrimental frequency-intensity spectra are converted into largely innocuous spectra, the inv...
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WO/1995/032529A1 |
An ultrawideband transverse electromagnetic mode horn antenna for use at high voltages, comprises a pulse generator (1) and two transmission horns (12, 18) containing different dielectric media. The interface (30) between the dielectric ...
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WO/1995/030256A1 |
A driven element (14) is disposed on an antenna axis (18) for transmission of electromagnetic energy in a transmission direction (20) along the antenna axis (18). First and second parasitic arrays (40, 42) are disposed on opposite sides ...
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WO/1995/029518A1 |
An antenna for transmitting or receiving electromagnetic radiation along an axis comprises at least three layers (20a, 20b, 20c, 20d and 20e) of dieletric material spaced from one another in a direction perpendicular to the axis. The out...
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WO/1995/025387A1 |
A small and light transceiver with an antenna, which is mainly installed outdoors, used for transmission and reception of radio signals, and manufactured from a small number of parts by a process of reduced man-hours. The transceiver is ...
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WO/1995/018980A1 |
Compact microwave and millimeter wave radars operating at 77 GHz and having resolution of no less than 3.2 meters at a distance of 100 meters. The exemplary dimensions of the radars are 145 millimeters in diameter and 100 or 85 millimete...
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WO/1995/015591A1 |
The invention pertains to a planar antenna (1) with surface resonators (5) that are linked to a feed point (7) through a supply network (6), the feed point (7) of the planar antenna being linked to the connection (11) to the downstream e...
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WO/1995/006963A1 |
Disclosed is a multi-positional antenna system for receiving signals from geostationary satellites. In order to achieve a many-fold increase in the number (up to forty) of geostationary satellites which can be positioned simultaneously w...
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WO/1995/001661A1 |
A multiple-frequency feed assembly for an antenna system having two coaxial cavities, with a smaller, high-frequency cavity mounted coaxially within a larger, low-frequency cavity. A separate rotatable probe is mounted within each cavity...
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WO/1995/000982A1 |
A radiation sensor (10) for the microwave and millimetre-wave regions incorporates a lens (12) having two parallel focal planes (26a, 36), these being defined by a polarization-selective reflecting PIN diode array (18) within the lens (1...
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WO/1994/028595A1 |
Antenna arrangements for use with portable communications devices are described. In one embodiment, an antenna (50) has four equally spaced monopole elements (52-58) mounted in a regular array on the outer surface of a solid cylinder str...
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WO/1994/026001A1 |
A 60 GHz LAN antenna uses a simplified rotary joint to enable antenna steering. A lower gain omnidirective antenna (12) used for signal acquisition is coaxially mounted with a steerable directive antenna (22) used for communication. The ...
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WO/1994/022180A1 |
An omnidirectional antenna with minimal gain variation over the 360� azimuth. A plurality of biconical antennas are stacked vertically. A radome covering the antenna and cylindrically encasing the antenna supports the stack of biconica...
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WO/1994/019842A1 |
It is an object of the present invention to present a feeder for a microwave antenna system which can be integrated together with electronical means on a common circuit board. According to the present invention a slot antenna, preferably...
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WO/1994/018719A1 |
In order to produce a directional antenna which is superior to those of the prior art, and especially a dipole antenna which is easier to manufacture and of simpler design, and also has enhanced electrical properties, the dipole with its...
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WO/1994/018720A1 |
The main body of this antenna is so structured that a narrow fan beam is reflected obliquely by a subreflector (3) which receives radio waves from the point (f2) of a horn (7) transmits them to the points (f2), and is further reflected b...
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WO/1994/017566A1 |
Radar apparatus provided with a Cassegrain antenna (1, 7-9) to be mounted on the barrel of a gun. The Cassegrain antenna is of the polarization twist type, a flat, adjustable mirror (9) being used for generating a lead angle. In addition...
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WO/1994/016472A1 |
It is an object of the present invention to receive simultaneously signals with different polarizations with the aid of helical feeders without gain degradation compared to known systems. According to the invention two or more helical fe...
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WO/1994/011921A1 |
There is disclosed an em-wave antenna, particularly suitable for reception of DBS television signals. Known antennae are of the "dish" type and suffer from a number of problems such as size, wind-loading, lack of eye-appeal, expense of m...
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WO/1994/001900A1 |
A zone plate focusing radiation comprises a plurality of surface portions (20a, 20b, 20c, 20d, 30) corresponding to zones of the zone plate. The surface portions are positioned in a plurality P of parallel planes such that each surface p...
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WO/1993/026059A1 |
A non-mechanical beam deflector (Figs. 21A-23B) forms and scans a beam of millimeter wave (MMW) radiation, from a MMW source (268), at a rapid rate. The beam deflector includes a semiconductor body (160, 280) in which a spatially varying...
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WO/1993/019497A1 |
The invention concerns a Fresnel-lens reflecting antenna (2) for receiving signals impinging the antenna essentially as a plane wave having a wavelength lambda. The antenna (2) comprises a reflecting structure formed by zones (5) situate...
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WO/1993/013570A1 |
The widebeam antenna includes a tapered dielectric waveguide (18, 20) having a radiating end (14) and an end for coupling electromagnetic energy into and out of the dielectric waveguide. A conducting sleeve (16) surrounds the dielectric ...
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WO/1993/010572A1 |
This invention relates to the fabrication of dielectric material suitable for dielectric antennas such as Luneburg-type lens antennas and to an according antenna system. It is an object of the present invention to produce dielectric mate...
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WO/1993/003508A1 |
A high gain antenna (20) that produces a pencil beam along the ground and a lower gain antenna (26) that produces a beam extending above the pencil beam are coupled to a source (2) of r.f. pulses so that the amplitude of the r.f. pulses ...
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WO/1992/021159A1 |
The present invention presents a radiowave antenna system, which includes means for the concentration of said means, like a parabolic reflector or a Luneburg-type lens. A primary feed (14), which receives the concentrated radiowaves, is ...
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WO/1992/019986A1 |
A camera system in which microwave radiation from objects in a field-of-view is collected by an antenna (2) having a beam direction which is a function of the beam frequency. The collected radiation is analyzed to produce an image of the...
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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/1992/007394A1 |
A satellite antenna capable of receiving signals from one or more, preferably at least two, satellites comprising a concave dish (2) and one or more receiver units (9, 10). Each receiver unit (9, 10) is positioned to the front and to one...
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WO/1992/005601A1 |
Systems and methods for simulating electromagnetic environments to be encountered by a moving object such as a missile (14) are disclosed. The systems include compact ranges in "hardware in the loop" ("HIL") simulating as projection syst...
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WO/1992/001953A1 |
A device for information transmission, a so-called transponder, for receiving a first microwave signal, modulating and coding, and retransmitting a second microwave signal, comprising at least one antenna means made in microstrip techniq...
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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/1991/015879A1 |
A dielectric inset (26) mountable within a conical horn antenna (1) for focusing an impinging electromagnetic wavefront as a planar wavefront at an attached waveguide (12). In one construction a homogeneous inset (29) having an ellipsoid...
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WO/1991/015880A1 |
In an antenna arrangement, a main reflector (1) and a sub-reflector (2) are supported by a common supporting strut (3) which also acts as a waveguide and which may house components of a receiving arrangement.
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WO/1991/012637A1 |
A patch array microwave antenna for microwave and millimetre wavebands comprising spaced subarrays each consisting of a surface fed patch (1) and a pair of parasitic patches (3a, 3b) fed from the non radiative edges of the fed patch (1),...
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WO/1991/006988A1 |
The receiving antenna comprises at least two sectors or areas (1, 2) of paraboloids which focus the radiation on their axes (xx') at points F1 and F2 respectively which are offset by an integer of wavelengths of the received radiation. E...
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WO/1991/002386A1 |
An antenna for the transmitter and receiver of a portable radio appliance (cordless telephone, mobile telephone, pager, telepoint appliance, etc.) consists essentially of two sheet metal angles (2, 3) arranged side by side. One of the tw...
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WO/1990/015453A1 |
An antenna is disclosed for increasing the gain of, or shaping the pattern of, a radiated radio frequency signal. The antenna includes a waveguide (10) for directing the radio frequency signal or for receiving directively the radio signa...
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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/1990/013927A1 |
An antenna system for use in transmitting and receiving beams of electromagnetic waves of frequencies up to and including the sub-millimetre region of the spectrum comprises a horn (1) and a lens arrangement (4, 5) all of which are of a ...
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WO/1990/013153A1 |
The invention concerns a reflector for converging reflecting electromagnetic radiation, the reflector comprising a number of reflecting surfaces (P1, P2), in which apertures (O1, O2) have been provided on such a short distance from the f...
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WO/1990/010959A1 |
An antenna (5) having driven colinear dipole array (18) and passive slot array (14). Dipole array (18) comprises active elements (34) and phasing bars (36). Slot array (14) comprises two passive elements (35) having slots (28, 30, 32). A...
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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/1990/006002A1 |
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/1990/003049A1 |
A wideband, true time delay antenna beam-forming network (10) for millimeter wave phased array antennas is disclosed herein. The beam-forming network (10) of the present invention includes a laser (30) for generating a beam B of electrom...
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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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