US3833909A - Compact wide-angle scanning antenna system - Google Patents
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- US3833909A US3833909A US00358242A US35824273A US3833909A US 3833909 A US3833909 A US 3833909A US 00358242 A US00358242 A US 00358242A US 35824273 A US35824273 A US 35824273A US 3833909 A US3833909 A US 3833909A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
- H01Q3/245—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching in the focal plane of a focussing device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
- H01Q3/14—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying the relative position of primary active element and a refracting or diffracting device
Definitions
- the invention pertains to scannable directional antennas for operation at high or microwave frequencies in such applications as radiometers and radar object detection systems and more particularly concerns an antenna system for rapid wide-angle scanning in one or in mutually perpendicular directions and having a configuration which is mechanically simple and electrically practical.
- a series of feeds may be located along the aforementioned line or circle, which feeds are successively connected to a transmitter or a receiver by a complex switching commutator
- Both alternatives require that the effective center of rotation of the feed element be at the vertex of the collimator, and both alternatives produce serious beam shape deterioration when approaching large scan angles.
- Even for scanning in a single plane the mechanical difficulties encountered in attempting high-speed, wide angle scanning with such prior art devices are severe and excessive weight and size problems are encountered.
- FIG. 1 is a plan view partly in cross section, of one embodiment of the invention.
- FIG. 2 is a plan view, partially in cross section, of an alternative embodiment of the apparatus of FIG. 1.
- FIG. 3 is an elevation view of a wave guide array for use in the embodiment of FIG. 2.
- the novel scanning antenna system may comprise as three major cooperating elements a scanning distributor element 1, a scan direction reversal or inversion element 2, and an energy collimating element 3.
- the apparatus may be constructed in the form of particular embodiments suited for scanning a radiation or reception pattern in a single plane or for scanning in mutually perpendicular or other planes.
- the single plane scanning energy distribution element I will comprise a feed, such as a pyramidal horn 4, for propagating a plane electromagnetic wave front, with respect to an aperture cyclically and continuously movable along a sector of a circle or arc 5 in successive positions such as locations 6 and 7.
- Horn 4 is supported on a wave guide it with respect to a conventional transmission line rotary joint 9 in such a manner that the aperture of horn 4- may be rotated along are 5 about the operational axis 10 of transmission line rotary joint 9.
- the arc 5 is defined in the single plane scanning system by the ends of a plurality of wave guides which make up the body of the scan inversion element 2; element 2 has planar symmetry about the system plane of symmetry indicated by dotvdash line Element 2 may consist of a stack of rectangular wave guides including a first pair of side by side central guides 16 contiguous with a successive wave guide pair 17 followed in a similar manner by guides 18, 19, 20, 21, and 22.
- the plurality of wave guide'pairs 16 through 22 terminate in an are shaped surface 23 at their ends opposite are 5, the centers of arcs-5 and 23 both preferably falling in the system plane of symmetry 15.
- Each of the ends of wave guides 16 through 22 is provided with an impedance matching element such as elements 24 and 25 shown within the opposed ends of wave guides 22.
- these impedance matching transformers are illustrated by way of example as blocks of dielectric material, although other known types of impedance matching devices may be used.
- the guides preferably support waves whose electric vector E lies in the plane of the drawing as shown in connection with guide 22.
- the objective of the scan inversion element 2 is to reorient the direction of propagation of the plane wave propagated within horn feed 4.
- the energy traversing the guides is to be redirected to flow as indicated by the dot-dash line so as to form radiation or receptivity pattern 33.
- Pattern 32 is formed when the horn 4 is at location 6 on the system plane of symmetry 15.
- Pattern 33 is similarly to be formed when horn 4 is at location 7.
- Redirection of energy flow is aided in the scan arc inversion system 2 by a system of pairs of wave guide delay elements 36 through 41 respectively associated with the wave guide pairs 16 through 21.
- the delay elements also assume that the scan inversion system is relatively short and permit the total system to be compact and simple in structure.
- the guides 16 through 21 are respectively loaded with dielectric delay elements 36 through 41 so that each electrical path length is equal to the electrical path length of the outermost guides 22. A relatively smaller delay is thus required for each of the delay lines in pair 21 than is required for each of the central delay lines 16.
- the wave guide pair 21 requires relatively short delay elements which may be constructed of relatively low dielectric constant material.
- the same material may be used to form the progressively longer delay elements 39 and 40 respectively found in wave guide pairs 19 and 20.
- the same progression may continue to the central pair of guides 16, but it is alternatively found convenient to select a material having a greater dielectric constant for delay element pairs 36, 37, and 38, as seen in FIG. 1.
- the dielectric materials are selected from those readily found on the market which exhibit relatively low loss characteristics at high or microwave frequencies.
- the energy collimator 3 may in one embodiment be formed of a solid dielectric material, also of low loss characteristics, in the shape of a right circular cylinder.
- the curvature of the cylindric surface matches that of the are 23 of the scan inversion element 2. In operation, therefore, the feed horn 4 cyclically traverses the arc 5. Because of the aforementioned equality of path lengths in the wave guides 16 through 23, the phases of the energy at the wave guide apertures on arcs 5 and 23 are not relatively shifted.
- a phase front directed in the illustrated position of horn 4 away from the axis of rotation is redirected at surface 23, as along dot-dashed line 30, through the center 42 of the circularly cylindric lens forming energy collimator 3 as is required for aberration free scanning, to form the desired undistorted radiation or reception pattern 31, for example.
- the travel of horn 4 may by cylically reversed at its extreme positions, or that horn 4 may travel continuously in a circle, being switched to an inactive status when the aperture of horn 4 is not on are 5.
- FIG. 1, as well as the other figures is drawn in proportions intended to illustrate the invention with good clarity, and that the proportions shown do not necessarily represent proportions which would be selected for use by those skilled in the art.
- the novel scanning antenna system may comprise a feed horn 4 arranged as in FIG. 2 for solid angle scanning about two mutually perpendicular axes, such as azimuth and elevation axes.
- the scanning distributor element 1 may employ a conventional gimbal system including scan axes 1.11 and 45.
- Horn 4 may be supported with respect to a radar or radiometer receiver 46 gimballed for movement in a prescribed azimuth pattern about the shaft at axis 10 by motor 47 when the latter is excited in a conventional manner by azimuth scan voltages coupled to motor leads 48.
- the shaft associated with axis 10 may be journaled in a gimbal 58, in turn, mounted for rotation on a shaft at axis 45 within trunnions 40, 511 by operation of motor 51.
- Motor 51 may be operated according to a prescribed pattern by the application of appropriate elevation scan voltages applied to leads 53 of motor 51. Scanning about the axes 1t and 43 may be regular and in a cyclic synchronized manner according to methods well known in the art for achieving raster and related solid angle types of scan of a directive antenna.
- the aperture of feed horn 4 is designed to move in two dimensions adjacent a spherical surface 55 made up of the multiplicity of apertures of a two dimensional stacked array using a plurality of planar arrays of guides 16 through 23 like the planar array shown in FIG. 1.
- the several wave guide delay elements employed are similarly arranged to provide equal propagation times for energy traversing scan inversion device 2 for any azimuth or elevation positional offset horn 4 with respect the axis 56 of the antenna system.
- the latter now has an axis of symmetry 56, replacing the plane of symmetry 15 of the FIG. 1 antenna scan system.
- Each ed of the scan inversion element is in the form of a concave spherical surface, so that surface 55 has opposed to it a concave spherical end surface 57 which matches the curvature of the spherical dielectric lens forming energy collimator 3.
- the major elements 1, 2, and 3 of the solid-angle scanning system of FIG. 2 operate in a manner analogous to the components of the FIG. 1 system, but yield scanning of radiation or reception patterns such as patterns 31, 32, and 33 in elevation as well as in azimuth.
- FIG. 2 may be made to operate satisfactorily with a two dimensional array of rectangular wave guides
- other guide shapes which represent minor variations of rectangular shapes may also be employed in the FIG. 2 system.
- the two-dimensional array of generally hexagonal guides formed by a standard aluminum honeycomb panel may be employed, as in FIG. 3.
- the hexagonal wave guide 60 may form the sole centrally located guide and is then equipped with a maximum delay element (not shown).
- Guides 61 immediately surrounding the central guide 60 require a slightly lesser delay element.
- Guides 62 immediately surrounding guides 61 require a lesser delay element than guides 61, and so on to the outermost circle of guides 64 which may be devoid of dielectric delay elements, if desired.
- the energy collimator 3 employed in the single axis scanning system of FIG. 1 may take the form of a cylindrical lens which is a microwave analog of the conventional circularly cylindric Luneberg optical lens wherein the low loss dielectric medium has an effective index of refraction which varies radially outward from the axis of the cylinder.
- the index 11 therefore varies with the normalized radius r according to the relation:
- the ribbon may be composed of low loss artifical dielectric material consisting of a controlled-density array of randomly oriented metallic par ticles supported within a low density foam dielectric bead matrix.
- the particles may be insulated silver or aluminum needles having a length less than one eight of the operating wave length and supported in foamed polystyrene.
- Such spherical lenses have the desired property of focusing a plane wave such as that produced by feed horn 4 accurately to a point on the sphere located diametrically opposite to the point of tangency of the plane phase front upon entering the sphere.
- the invention provides novel means for the rapid wide-angle scanning of space with minimum distortion of a directive radiation or receptivity pattern.
- Operation of the scanning feature may be in one or in two mutually perpendicular directions by employing a simple, light-weight feed chamber mechanism in an antenna system occupying a minimum of space and low in weight and cost.
- Antenna apparatus comprising: dielectric electromagnetic wave collimating means having substantially spherical boundary means,
- electromagnetic wave distributor means having energy exhanging aperture means movable along spherical sector means
- multiple transmission line means extending in energy exchanging relation between a portion of said spherical boundary means and a portion of said spherical sector means, said multiple transmission line means including:
- each of said wave guides having wall means in contiguous relation with wallmeans of an adjacent one of said wave guides, and
- delay means within said array of wave guides adapted for making the electromagneticwave propagation times through all of said wave guides substantially equal.
- said first energy exchanging end being disposed in energy exchanging relation with said dielectric electromagnetic wave collimating means
- said electromagnetic wave distributor means comprises wave guide means journalled for movement about at least one axis.
- dielectric electromagnetic wave collimating means is a solid sphere of low loss dielectric material.
- said electromagnetic wave distribution means comprises wave guide means journalled for movement about first and second mutually perpendicular axes.
Abstract
A compact, rapidly scannable, high frequency directional antenna system provides wide-angle space scanning in one or more dirctions by employing a moving feed for commutating energy flow through a wave guide array illuminating or receiving high frequency energy from a cylindrical or spherical energy collimator.
Description
343-75m SR United States Patent 'l l i v [1 11 3,833,909 Schaufelberger I Sept, 3, 1974 [54] COMPACT WIDE-ANGLE SCANNING 7 2,720,589 10/1955 Proctor 343/754 ANTENNA SYSTEM 3,230,535 I 1/1966 Ferrante et al. 343/754 3,404,405 10/1968 Young 343/754 [75] Inventor: Arthur H. Schauielberger, Crystal Beach, Fla. Primary Examiner-Ell Lieberman Asslgneei gl l'z'ylgg Corporation New Attorney, Agent, or Firm-Howard P. Terry [22] Filed: May 7, 1973 [21] Appl. No.2 358,242 [57] ABSTRACT A compact, rapidly scannable, high frequency direc- 52] CL 343/754 L tional antenna system provides wide-angle space scan- [51] rm. Cl. .IIIIIIIIIIIIIIIIIIIIIIIIIII irm 19/06 dimim by empbying 58 Field of Search 3437754, 761, 839, 911 L i 3 energy Pl f a w guide array illuminating or receiving high frequency [56] References Cited I energy from a cylindrical or spherical energy collimav UNITED STATES PATENTS or v 1 I 2,566,703 9/1951 Iams .343/753 9 Claims, 3 Drawing Figures I 8 5 4a 56 4 K W i I l0 I! L J r 55 M all (IOMPACT WIDE-ANGLE SCANNING ANTENNA SYSTEM The invention herein described was made in the course of or under a contract or a subcontract thereunder with the United States Air Force.
BACKGROUND OF THE INVENTION 1. Field of the Invention The invention pertains to scannable directional antennas for operation at high or microwave frequencies in such applications as radiometers and radar object detection systems and more particularly concerns an antenna system for rapid wide-angle scanning in one or in mutually perpendicular directions and having a configuration which is mechanically simple and electrically practical.
2. Description of the Prior Art In the past, there have been many applications for directive antennas which permit the scanning of a radiation or receptivity pattern over an angular sector of space somewhat greater than one beam width. In some applications, it has been found convenient to move the entire antenna (both its feed and its collimation elements) in integral manner over the desired scan angle. When the latter method may not be used because of the relatively large size and inertia of an antenna, scanning has been achieved by moving the feed with respect to the collimator, as along a line including the focus of the collimator, or around a small circle centered at that focus, for example. Alternatively, a series of feeds may be located along the aforementioned line or circle, which feeds are successively connected to a transmitter or a receiver by a complex switching commutator Both alternatives require that the effective center of rotation of the feed element be at the vertex of the collimator, and both alternatives produce serious beam shape deterioration when approaching large scan angles. Even for scanning in a single plane, the mechanical difficulties encountered in attempting high-speed, wide angle scanning with such prior art devices are severe and excessive weight and size problems are encountered.
SUMMARY OF THE INVENTION BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view partly in cross section, of one embodiment of the invention.
FIG. 2 is a plan view, partially in cross section, of an alternative embodiment of the apparatus of FIG. 1.
FIG. 3 is an elevation view of a wave guide array for use in the embodiment of FIG. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENTS The novel scanning antenna system, as seen in FIG. 1, may comprise as three major cooperating elements a scanning distributor element 1, a scan direction reversal or inversion element 2, and an energy collimating element 3. As will be explained, the apparatus may be constructed in the form of particular embodiments suited for scanning a radiation or reception pattern in a single plane or for scanning in mutually perpendicular or other planes. In general, the single plane scanning energy distribution element I will comprise a feed, such as a pyramidal horn 4, for propagating a plane electromagnetic wave front, with respect to an aperture cyclically and continuously movable along a sector of a circle or arc 5 in successive positions such as locations 6 and 7. Horn 4 is supported on a wave guide it with respect to a conventional transmission line rotary joint 9 in such a manner that the aperture of horn 4- may be rotated along are 5 about the operational axis 10 of transmission line rotary joint 9.
The arc 5 is defined in the single plane scanning system by the ends of a plurality of wave guides which make up the body of the scan inversion element 2; element 2 has planar symmetry about the system plane of symmetry indicated by dotvdash line Element 2 may consist of a stack of rectangular wave guides including a first pair of side by side central guides 16 contiguous with a successive wave guide pair 17 followed in a similar manner by guides 18, 19, 20, 21, and 22. The plurality of wave guide'pairs 16 through 22 terminate in an are shaped surface 23 at their ends opposite are 5, the centers of arcs-5 and 23 both preferably falling in the system plane of symmetry 15. Each of the ends of wave guides 16 through 22 is provided with an impedance matching element such as elements 24 and 25 shown within the opposed ends of wave guides 22.. In the drawing, these impedance matching transformers are illustrated by way of example as blocks of dielectric material, although other known types of impedance matching devices may be used. The guides preferably support waves whose electric vector E lies in the plane of the drawing as shown in connection with guide 22.
The objective of the scan inversion element 2 is to reorient the direction of propagation of the plane wave propagated within horn feed 4. For example, when horn 4 is in the position shown in FIG. I. for feeding the wave guides 21 and 22 at the extreme left side of scan inverter 2, the energy traversing the guides is to be redirected to flow as indicated by the dot-dash line so as to form radiation or receptivity pattern 33. Pattern 32 is formed when the horn 4 is at location 6 on the system plane of symmetry 15. Pattern 33 is similarly to be formed when horn 4 is at location 7.
Redirection of energy flow is aided in the scan arc inversion system 2 by a system of pairs of wave guide delay elements 36 through 41 respectively associated with the wave guide pairs 16 through 21. The delay elements also assume that the scan inversion system is relatively short and permit the total system to be compact and simple in structure. With the exception of the outermost wave guide pair 22, the guides 16 through 21 are respectively loaded with dielectric delay elements 36 through 41 so that each electrical path length is equal to the electrical path length of the outermost guides 22. A relatively smaller delay is thus required for each of the delay lines in pair 21 than is required for each of the central delay lines 16.
Thus, the wave guide pair 21 requires relatively short delay elements which may be constructed of relatively low dielectric constant material. The same material may be used to form the progressively longer delay elements 39 and 40 respectively found in wave guide pairs 19 and 20. The same progression may continue to the central pair of guides 16, but it is alternatively found convenient to select a material having a greater dielectric constant for delay element pairs 36, 37, and 38, as seen in FIG. 1. The dielectric materials are selected from those readily found on the market which exhibit relatively low loss characteristics at high or microwave frequencies.
In the single plane scanning system of FIG. 1, the energy collimator 3 may in one embodiment be formed of a solid dielectric material, also of low loss characteristics, in the shape of a right circular cylinder. The curvature of the cylindric surface matches that of the are 23 of the scan inversion element 2. In operation, therefore, the feed horn 4 cyclically traverses the arc 5. Because of the aforementioned equality of path lengths in the wave guides 16 through 23, the phases of the energy at the wave guide apertures on arcs 5 and 23 are not relatively shifted. Because of the physical geometry of the system, a phase front directed in the illustrated position of horn 4 away from the axis of rotation is redirected at surface 23, as along dot-dashed line 30, through the center 42 of the circularly cylindric lens forming energy collimator 3 as is required for aberration free scanning, to form the desired undistorted radiation or reception pattern 31, for example. It will be understood that the travel of horn 4 may by cylically reversed at its extreme positions, or that horn 4 may travel continuously in a circle, being switched to an inactive status when the aperture of horn 4 is not on are 5. It will also be understood by those skilled in the art that FIG. 1, as well as the other figures, is drawn in proportions intended to illustrate the invention with good clarity, and that the proportions shown do not necessarily represent proportions which would be selected for use by those skilled in the art.
As suggested in the foregoing, the novel scanning antenna system may comprise a feed horn 4 arranged as in FIG. 2 for solid angle scanning about two mutually perpendicular axes, such as azimuth and elevation axes. For this purpose, the scanning distributor element 1 may employ a conventional gimbal system including scan axes 1.11 and 45. Horn 4 may be supported with respect to a radar or radiometer receiver 46 gimballed for movement in a prescribed azimuth pattern about the shaft at axis 10 by motor 47 when the latter is excited in a conventional manner by azimuth scan voltages coupled to motor leads 48. The shaft associated with axis 10 may be journaled in a gimbal 58, in turn, mounted for rotation on a shaft at axis 45 within trunnions 40, 511 by operation of motor 51. Motor 51 may be operated according to a prescribed pattern by the application of appropriate elevation scan voltages applied to leads 53 of motor 51. Scanning about the axes 1t and 43 may be regular and in a cyclic synchronized manner according to methods well known in the art for achieving raster and related solid angle types of scan of a directive antenna.
In the solid angle scanning system of FIG. 2, the aperture of feed horn 4 is designed to move in two dimensions adjacent a spherical surface 55 made up of the multiplicity of apertures of a two dimensional stacked array using a plurality of planar arrays of guides 16 through 23 like the planar array shown in FIG. 1. The several wave guide delay elements employed are similarly arranged to provide equal propagation times for energy traversing scan inversion device 2 for any azimuth or elevation positional offset horn 4 with respect the axis 56 of the antenna system. The latter now has an axis of symmetry 56, replacing the plane of symmetry 15 of the FIG. 1 antenna scan system.
Each ed of the scan inversion element is in the form of a concave spherical surface, so that surface 55 has opposed to it a concave spherical end surface 57 which matches the curvature of the spherical dielectric lens forming energy collimator 3. It will be readily understood by those skilled in the art that the major elements 1, 2, and 3 of the solid-angle scanning system of FIG. 2 operate in a manner analogous to the components of the FIG. 1 system, but yield scanning of radiation or reception patterns such as patterns 31, 32, and 33 in elevation as well as in azimuth.
While the embodiment of FIG. 2 may be made to operate satisfactorily with a two dimensional array of rectangular wave guides, other guide shapes which represent minor variations of rectangular shapes may also be employed in the FIG. 2 system. For example, the two-dimensional array of generally hexagonal guides formed by a standard aluminum honeycomb panel may be employed, as in FIG. 3. In this instance, the hexagonal wave guide 60 may form the sole centrally located guide and is then equipped with a maximum delay element (not shown). Guides 61 immediately surrounding the central guide 60 require a slightly lesser delay element. Guides 62 immediately surrounding guides 61 require a lesser delay element than guides 61, and so on to the outermost circle of guides 64 which may be devoid of dielectric delay elements, if desired.
The energy collimator 3 employed in the single axis scanning system of FIG. 1 may take the form of a cylindrical lens which is a microwave analog of the conventional circularly cylindric Luneberg optical lens wherein the low loss dielectric medium has an effective index of refraction which varies radially outward from the axis of the cylinder. The index 11 therefore varies with the normalized radius r according to the relation:
( l such cylindric lenses have been fabricated in the prior art by forming a long, constant width ribbon of a material having progressively varying dielectric characteristics and then winding the ribbon into a spiral to form the desired cylinder. The ribbon may be composed of low loss artifical dielectric material consisting of a controlled-density array of randomly oriented metallic par ticles supported within a low density foam dielectric bead matrix. The particles may be insulated silver or aluminum needles having a length less than one eight of the operating wave length and supported in foamed polystyrene. Sperical lenses suitable for use as energy collimator 3 in FIG. 2 and having a radially varying index of refraction have been similarly made in the prior art by stacking a plurality of such short cylinders to approximate the desired spherical shape or by making an assembly of pyramidal sectors each having radially graded dielectric characteristics and each being assembled with an apex at the center of the sphere which they form in total. Such spherical lenses have the desired property of focusing a plane wave such as that produced by feed horn 4 accurately to a point on the sphere located diametrically opposite to the point of tangency of the plane phase front upon entering the sphere. v
Accordingly, it is seen that the invention provides novel means for the rapid wide-angle scanning of space with minimum distortion of a directive radiation or receptivity pattern. Operation of the scanning feature may be in one or in two mutually perpendicular directions by employing a simple, light-weight feed chamber mechanism in an antenna system occupying a minimum of space and low in weight and cost.
While the inventionhas been described in its preferred embodiments, it is to be understood that the words which have been used are words of description rather than of limitation and that changes within the purview of the appended claims may be made without departing from the true scope and spirit of the invention in its broader aspects.
I claim: 1. Antenna apparatus comprising: dielectric electromagnetic wave collimating means having substantially spherical boundary means,
electromagnetic wave distributor means having energy exhanging aperture means movable along spherical sector means, and
multiple transmission line means extending in energy exchanging relation between a portion of said spherical boundary means and a portion of said spherical sector means, said multiple transmission line means including:
an array of wave guides in parallel alignment, each of said wave guides having wall means in contiguous relation with wallmeans of an adjacent one of said wave guides, and
delay means within said array of wave guides adapted for making the electromagneticwave propagation times through all of said wave guides substantially equal.
2. Apparatus as described in claim 1 wherein said array of wave guides has first and second opposed concave energy exchanging ends.
said first energy exchanging end being disposed in energy exchanging relation with said dielectric electromagnetic wave collimating means, and
said second energy exchanging end forming said portion of said circular sector means.
3. Apparatus as described in claim 2 wherein said array of wave guides is equipped with impedance matching means at said first and second opposed energy exchanging ends.
4. Apparatus as described in claim 2 wherein said delay means comprise dielectric phase delay means.
5. Apparatus as described in claim 2 wherein said electromagnetic wave distributor means comprises wave guide means journalled for movement about at least one axis.
6. Apparatus as described in claim 2 wherein said first andsecond opposed concave energy exchanging ends are each in the forms of segments of spherical surfaces. v
7. Apparatus as described in claim 6 wherein said dielectric electromagnetic wave collimating means is a solid sphere of low loss dielectric material.
8. Apparatus as described in claim 7 wherein said solid sphere of low loss dielectricmaterial has an effective' index of refraction n which varies with the normalized sphere radius r as:
9. Apparatus as described in claim 7 wherein said electromagnetic wave distribution means comprises wave guide means journalled for movement about first and second mutually perpendicular axes.
Claims (9)
1. Antenna apparatus comprising: dielectric electromagnetic wave collimating means having substantially spherical boundary means, electromagnetic wave distributor means having energy exhanging aperture means movable along spherical sector means, and multiple transmission line means extending in energy exchanging relation between a portion of said spherical boundary means and a portion of said spherical sector means, said multiple transmission line means including: an array of wave guides in parallel alignment, each of said wave guides having wall means in contiguous relation with wall means of an adjacent one of said wave guides, and delay means within said array of wave guides adapted for making the electromagnetic wave propagation times through all of said wave guides substantially equal.
2. Apparatus as described in claim 1 wherein said array of wave guides has first and second opposed concave energy exchanging ends. said first energy exchanging end being disposed in energy exchanging relation with said dielectric electromagnetic wave collimating means, and said second energy exchanging end forming said portion of said circular sector means.
3. Apparatus as described in claim 2 wherein said array of wave guides is equipped with impedance matching means at said first and second opposed energy exchanging ends.
4. Apparatus as described in claim 2 wherein said delay means comprise dielectric phase delay means.
5. Apparatus as described in claim 2 wherein said electromagnetic wave distributor means comprises wave guide means journalled for movement about at least one axis.
6. Apparatus as described in claim 2 wherein said first and second opposed concave energy exchanging ends are each in the forms of segments of spherical surfaces.
7. Apparatus as described in claim 6 wherein said dielectric electromagnetic wave collimating means is a solid sphere of low loss dielectric material.
8. Apparatus as described in claim 7 wherein said solid sphere of low loss dielectric material has an effective index of refraction n which varies with the normalized sphere radius r as: n Square Root 2 - r2
9. Apparatus as described in claim 7 wherein said electromagnetic wave distribution means comprises wave guide means journalled for movement about first and second mutually perpendicular axes.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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US00358242A US3833909A (en) | 1973-05-07 | 1973-05-07 | Compact wide-angle scanning antenna system |
CA193,632A CA1014263A (en) | 1973-05-07 | 1974-02-27 | Compact wide-angle scanning antenna system |
JP49028448A JPS5011351A (en) | 1973-05-07 | 1974-03-12 | |
GB1556574A GB1415994A (en) | 1973-05-07 | 1974-04-09 | Antenna apparatus |
IT50540/74A IT1008461B (en) | 1973-05-07 | 1974-04-22 | IMPROVEMENT OF RADAR RADIOMETERS AND SIMILAR ANTENNAS |
DE2421494A DE2421494A1 (en) | 1973-05-07 | 1974-05-03 | ANTENNA DEVICE |
FR7415512A FR2229149A1 (en) | 1973-05-07 | 1974-05-06 |
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US00358242A US3833909A (en) | 1973-05-07 | 1973-05-07 | Compact wide-angle scanning antenna system |
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US3833909A true US3833909A (en) | 1974-09-03 |
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US00358242A Expired - Lifetime US3833909A (en) | 1973-05-07 | 1973-05-07 | Compact wide-angle scanning antenna system |
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US (1) | US3833909A (en) |
JP (1) | JPS5011351A (en) |
CA (1) | CA1014263A (en) |
DE (1) | DE2421494A1 (en) |
FR (1) | FR2229149A1 (en) |
GB (1) | GB1415994A (en) |
IT (1) | IT1008461B (en) |
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US4001835A (en) * | 1975-05-12 | 1977-01-04 | Texas Instruments Incorporated | Scanning antenna with extended off broadside scanning capability |
US4156878A (en) * | 1978-01-25 | 1979-05-29 | The United States Of America As Represented By The Secretary Of The Air Force | Wideband waveguide lens |
US4531129A (en) * | 1983-03-01 | 1985-07-23 | Cubic Corporation | Multiple-feed luneberg lens scanning antenna system |
FR2582157A1 (en) * | 1985-05-15 | 1986-11-21 | Snecma | Antenna with reduced scanning step over a wide angular sector |
US4626858A (en) * | 1983-04-01 | 1986-12-02 | Kentron International, Inc. | Antenna system |
US5948038A (en) * | 1996-07-31 | 1999-09-07 | American Traffic Systems, Inc. | Traffic violation processing system |
US6111523A (en) * | 1995-11-20 | 2000-08-29 | American Traffic Systems, Inc. | Method and apparatus for photographing traffic in an intersection |
US6362795B2 (en) * | 1997-01-07 | 2002-03-26 | Murata Manufacturing Co., Ltd. | Antenna apparatus and transmission and receiving apparatus using the same |
US6426814B1 (en) | 1999-10-13 | 2002-07-30 | Caly Corporation | Spatially switched router for wireless data packets |
US6789744B2 (en) | 2002-01-29 | 2004-09-14 | Valeo Electrical Systems, Inc. | Fluid heater with a variable mass flow path |
US20040197094A1 (en) * | 2003-04-04 | 2004-10-07 | Amberg Michael T. | Fluid heater with compressible cover freeze protection |
US20110102098A1 (en) * | 2007-06-04 | 2011-05-05 | Helsinki University Of Technology | Structure for reducing scattering of electromagnetic waves |
US9119127B1 (en) | 2012-12-05 | 2015-08-25 | At&T Intellectual Property I, Lp | Backhaul link for distributed antenna system |
US9154966B2 (en) | 2013-11-06 | 2015-10-06 | At&T Intellectual Property I, Lp | Surface-wave communications and methods thereof |
US9209902B2 (en) | 2013-12-10 | 2015-12-08 | At&T Intellectual Property I, L.P. | Quasi-optical coupler |
US9312919B1 (en) | 2014-10-21 | 2016-04-12 | At&T Intellectual Property I, Lp | Transmission device with impairment compensation and methods for use therewith |
US9461706B1 (en) | 2015-07-31 | 2016-10-04 | At&T Intellectual Property I, Lp | Method and apparatus for exchanging communication signals |
US9490869B1 (en) | 2015-05-14 | 2016-11-08 | At&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
US9503189B2 (en) | 2014-10-10 | 2016-11-22 | At&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
US9509415B1 (en) | 2015-06-25 | 2016-11-29 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
US9520945B2 (en) | 2014-10-21 | 2016-12-13 | At&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
US9525210B2 (en) | 2014-10-21 | 2016-12-20 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9525524B2 (en) | 2013-05-31 | 2016-12-20 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9531427B2 (en) | 2014-11-20 | 2016-12-27 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US9564947B2 (en) | 2014-10-21 | 2017-02-07 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with diversity and methods for use therewith |
US9577306B2 (en) | 2014-10-21 | 2017-02-21 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US20170084994A1 (en) * | 2015-09-22 | 2017-03-23 | Qualcomm Incorporated | Low-cost satellite user terminal antenna |
US9608740B2 (en) | 2015-07-15 | 2017-03-28 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9608692B2 (en) | 2015-06-11 | 2017-03-28 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US9615269B2 (en) | 2014-10-02 | 2017-04-04 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9628116B2 (en) | 2015-07-14 | 2017-04-18 | At&T Intellectual Property I, L.P. | Apparatus and methods for transmitting wireless signals |
US9628854B2 (en) | 2014-09-29 | 2017-04-18 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing content in a communication network |
US9640850B2 (en) | 2015-06-25 | 2017-05-02 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
US9654173B2 (en) | 2014-11-20 | 2017-05-16 | At&T Intellectual Property I, L.P. | Apparatus for powering a communication device and methods thereof |
US9653770B2 (en) | 2014-10-21 | 2017-05-16 | At&T Intellectual Property I, L.P. | Guided wave coupler, coupling module and methods for use therewith |
US9667317B2 (en) | 2015-06-15 | 2017-05-30 | At&T Intellectual Property I, L.P. | Method and apparatus for providing security using network traffic adjustments |
US9680670B2 (en) | 2014-11-20 | 2017-06-13 | At&T Intellectual Property I, L.P. | Transmission device with channel equalization and control and methods for use therewith |
US9685992B2 (en) | 2014-10-03 | 2017-06-20 | At&T Intellectual Property I, L.P. | Circuit panel network and methods thereof |
US9692101B2 (en) | 2014-08-26 | 2017-06-27 | At&T Intellectual Property I, L.P. | Guided wave couplers for coupling electromagnetic waves between a waveguide surface and a surface of a wire |
US9705571B2 (en) | 2015-09-16 | 2017-07-11 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system |
US9705561B2 (en) | 2015-04-24 | 2017-07-11 | At&T Intellectual Property I, L.P. | Directional coupling device and methods for use therewith |
US9722318B2 (en) | 2015-07-14 | 2017-08-01 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9729197B2 (en) | 2015-10-01 | 2017-08-08 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating network management traffic over a network |
US9735833B2 (en) | 2015-07-31 | 2017-08-15 | At&T Intellectual Property I, L.P. | Method and apparatus for communications management in a neighborhood network |
US9742462B2 (en) | 2014-12-04 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission medium and communication interfaces and methods for use therewith |
US9749053B2 (en) | 2015-07-23 | 2017-08-29 | At&T Intellectual Property I, L.P. | Node device, repeater and methods for use therewith |
US9749013B2 (en) | 2015-03-17 | 2017-08-29 | At&T Intellectual Property I, L.P. | Method and apparatus for reducing attenuation of electromagnetic waves guided by a transmission medium |
US9748626B2 (en) | 2015-05-14 | 2017-08-29 | At&T Intellectual Property I, L.P. | Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium |
US9755697B2 (en) | 2014-09-15 | 2017-09-05 | At&T Intellectual Property I, L.P. | Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves |
US9762289B2 (en) | 2014-10-14 | 2017-09-12 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting or receiving signals in a transportation system |
US9769128B2 (en) | 2015-09-28 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for encryption of communications over a network |
US9769020B2 (en) | 2014-10-21 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for responding to events affecting communications in a communication network |
US9780834B2 (en) | 2014-10-21 | 2017-10-03 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting electromagnetic waves |
US9793955B2 (en) | 2015-04-24 | 2017-10-17 | At&T Intellectual Property I, Lp | Passive electrical coupling device and methods for use therewith |
US9793951B2 (en) | 2015-07-15 | 2017-10-17 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9793954B2 (en) | 2015-04-28 | 2017-10-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device and methods for use therewith |
US9800327B2 (en) | 2014-11-20 | 2017-10-24 | At&T Intellectual Property I, L.P. | Apparatus for controlling operations of a communication device and methods thereof |
US9820146B2 (en) | 2015-06-12 | 2017-11-14 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9838896B1 (en) | 2016-12-09 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for assessing network coverage |
US9836957B2 (en) | 2015-07-14 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating with premises equipment |
US9847566B2 (en) | 2015-07-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a field of a signal to mitigate interference |
US9847850B2 (en) | 2014-10-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
US9853342B2 (en) | 2015-07-14 | 2017-12-26 | At&T Intellectual Property I, L.P. | Dielectric transmission medium connector and methods for use therewith |
US9860075B1 (en) | 2016-08-26 | 2018-01-02 | At&T Intellectual Property I, L.P. | Method and communication node for broadband distribution |
US9866309B2 (en) | 2015-06-03 | 2018-01-09 | At&T Intellectual Property I, Lp | Host node device and methods for use therewith |
US9865911B2 (en) | 2015-06-25 | 2018-01-09 | At&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
US9871283B2 (en) | 2015-07-23 | 2018-01-16 | At&T Intellectual Property I, Lp | Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration |
US9871282B2 (en) | 2015-05-14 | 2018-01-16 | At&T Intellectual Property I, L.P. | At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric |
US9876605B1 (en) | 2016-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Launcher and coupling system to support desired guided wave mode |
US9876264B2 (en) | 2015-10-02 | 2018-01-23 | At&T Intellectual Property I, Lp | Communication system, guided wave switch and methods for use therewith |
US9876571B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9882277B2 (en) | 2015-10-02 | 2018-01-30 | At&T Intellectual Property I, Lp | Communication device and antenna assembly with actuated gimbal mount |
US9882257B2 (en) | 2015-07-14 | 2018-01-30 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9893795B1 (en) | 2016-12-07 | 2018-02-13 | At&T Intellectual Property I, Lp | Method and repeater for broadband distribution |
US9904535B2 (en) | 2015-09-14 | 2018-02-27 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing software |
US9906269B2 (en) | 2014-09-17 | 2018-02-27 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9912381B2 (en) | 2015-06-03 | 2018-03-06 | At&T Intellectual Property I, Lp | Network termination and methods for use therewith |
US9911020B1 (en) | 2016-12-08 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for tracking via a radio frequency identification device |
US9912027B2 (en) | 2015-07-23 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9912419B1 (en) | 2016-08-24 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for managing a fault in a distributed antenna system |
US9913139B2 (en) | 2015-06-09 | 2018-03-06 | At&T Intellectual Property I, L.P. | Signal fingerprinting for authentication of communicating devices |
US9917341B2 (en) | 2015-05-27 | 2018-03-13 | At&T Intellectual Property I, L.P. | Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves |
US9927517B1 (en) | 2016-12-06 | 2018-03-27 | At&T Intellectual Property I, L.P. | Apparatus and methods for sensing rainfall |
US9948354B2 (en) | 2015-04-28 | 2018-04-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device with reflective plate and methods for use therewith |
US9948333B2 (en) | 2015-07-23 | 2018-04-17 | At&T Intellectual Property I, L.P. | Method and apparatus for wireless communications to mitigate interference |
US9954287B2 (en) | 2014-11-20 | 2018-04-24 | At&T Intellectual Property I, L.P. | Apparatus for converting wireless signals and electromagnetic waves and methods thereof |
US9967173B2 (en) | 2015-07-31 | 2018-05-08 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9973940B1 (en) | 2017-02-27 | 2018-05-15 | At&T Intellectual Property I, L.P. | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
US9991580B2 (en) | 2016-10-21 | 2018-06-05 | At&T Intellectual Property I, L.P. | Launcher and coupling system for guided wave mode cancellation |
US9999038B2 (en) | 2013-05-31 | 2018-06-12 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9998870B1 (en) | 2016-12-08 | 2018-06-12 | At&T Intellectual Property I, L.P. | Method and apparatus for proximity sensing |
US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
US10009065B2 (en) | 2012-12-05 | 2018-06-26 | At&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
US10009063B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal |
US10009067B2 (en) | 2014-12-04 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for configuring a communication interface |
US10009901B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method, apparatus, and computer-readable storage medium for managing utilization of wireless resources between base stations |
US10020587B2 (en) | 2015-07-31 | 2018-07-10 | At&T Intellectual Property I, L.P. | Radial antenna and methods for use therewith |
US10020844B2 (en) | 2016-12-06 | 2018-07-10 | T&T Intellectual Property I, L.P. | Method and apparatus for broadcast communication via guided waves |
US10027397B2 (en) | 2016-12-07 | 2018-07-17 | At&T Intellectual Property I, L.P. | Distributed antenna system and methods for use therewith |
US10033108B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave having a wave mode that mitigates interference |
US10033107B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US10044409B2 (en) | 2015-07-14 | 2018-08-07 | At&T Intellectual Property I, L.P. | Transmission medium and methods for use therewith |
US10051483B2 (en) | 2015-10-16 | 2018-08-14 | At&T Intellectual Property I, L.P. | Method and apparatus for directing wireless signals |
US10051629B2 (en) | 2015-09-16 | 2018-08-14 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an in-band reference signal |
US10069535B2 (en) | 2016-12-08 | 2018-09-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves having a certain electric field structure |
US10074890B2 (en) | 2015-10-02 | 2018-09-11 | At&T Intellectual Property I, L.P. | Communication device and antenna with integrated light assembly |
US10079661B2 (en) | 2015-09-16 | 2018-09-18 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a clock reference |
US10090606B2 (en) | 2015-07-15 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system with dielectric array and methods for use therewith |
US10090594B2 (en) | 2016-11-23 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system having structural configurations for assembly |
US10103422B2 (en) | 2016-12-08 | 2018-10-16 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10103801B2 (en) | 2015-06-03 | 2018-10-16 | At&T Intellectual Property I, L.P. | Host node device and methods for use therewith |
US10136434B2 (en) | 2015-09-16 | 2018-11-20 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an ultra-wideband control channel |
US10135146B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via circuits |
US10135147B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via an antenna |
US10135145B2 (en) | 2016-12-06 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave along a transmission medium |
US10142086B2 (en) | 2015-06-11 | 2018-11-27 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US10139820B2 (en) | 2016-12-07 | 2018-11-27 | At&T Intellectual Property I, L.P. | Method and apparatus for deploying equipment of a communication system |
US10144036B2 (en) | 2015-01-30 | 2018-12-04 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating interference affecting a propagation of electromagnetic waves guided by a transmission medium |
US10148016B2 (en) | 2015-07-14 | 2018-12-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array |
US10154493B2 (en) | 2015-06-03 | 2018-12-11 | At&T Intellectual Property I, L.P. | Network termination and methods for use therewith |
US10170840B2 (en) | 2015-07-14 | 2019-01-01 | At&T Intellectual Property I, L.P. | Apparatus and methods for sending or receiving electromagnetic signals |
US10168695B2 (en) | 2016-12-07 | 2019-01-01 | At&T Intellectual Property I, L.P. | Method and apparatus for controlling an unmanned aircraft |
US10178445B2 (en) | 2016-11-23 | 2019-01-08 | At&T Intellectual Property I, L.P. | Methods, devices, and systems for load balancing between a plurality of waveguides |
US10205655B2 (en) | 2015-07-14 | 2019-02-12 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array and multiple communication paths |
CN109378585A (en) * | 2018-10-19 | 2019-02-22 | 电子科技大学 | The circular polarisation Luneberg lens antenna of half space wave cover |
US10225025B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method and apparatus for detecting a fault in a communication system |
US10224634B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Methods and apparatus for adjusting an operational characteristic of an antenna |
US10243784B2 (en) | 2014-11-20 | 2019-03-26 | At&T Intellectual Property I, L.P. | System for generating topology information and methods thereof |
US10243270B2 (en) | 2016-12-07 | 2019-03-26 | At&T Intellectual Property I, L.P. | Beam adaptive multi-feed dielectric antenna system and methods for use therewith |
US10264586B2 (en) | 2016-12-09 | 2019-04-16 | At&T Mobility Ii Llc | Cloud-based packet controller and methods for use therewith |
US10291334B2 (en) | 2016-11-03 | 2019-05-14 | At&T Intellectual Property I, L.P. | System for detecting a fault in a communication system |
US10291311B2 (en) | 2016-09-09 | 2019-05-14 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating a fault in a distributed antenna system |
US10298293B2 (en) | 2017-03-13 | 2019-05-21 | At&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
US10305190B2 (en) | 2016-12-01 | 2019-05-28 | At&T Intellectual Property I, L.P. | Reflecting dielectric antenna system and methods for use therewith |
US10312567B2 (en) | 2016-10-26 | 2019-06-04 | At&T Intellectual Property I, L.P. | Launcher with planar strip antenna and methods for use therewith |
US10320586B2 (en) | 2015-07-14 | 2019-06-11 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium |
US10326689B2 (en) | 2016-12-08 | 2019-06-18 | At&T Intellectual Property I, L.P. | Method and system for providing alternative communication paths |
US10326494B2 (en) | 2016-12-06 | 2019-06-18 | At&T Intellectual Property I, L.P. | Apparatus for measurement de-embedding and methods for use therewith |
US10340573B2 (en) | 2016-10-26 | 2019-07-02 | At&T Intellectual Property I, L.P. | Launcher with cylindrical coupling device and methods for use therewith |
US10341142B2 (en) | 2015-07-14 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an uninsulated conductor |
US10340601B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Multi-antenna system and methods for use therewith |
US10340983B2 (en) | 2016-12-09 | 2019-07-02 | At&T Intellectual Property I, L.P. | Method and apparatus for surveying remote sites via guided wave communications |
US10340600B2 (en) | 2016-10-18 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via plural waveguide systems |
US10340603B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Antenna system having shielded structural configurations for assembly |
US10348391B2 (en) | 2015-06-03 | 2019-07-09 | At&T Intellectual Property I, L.P. | Client node device with frequency conversion and methods for use therewith |
US10355367B2 (en) | 2015-10-16 | 2019-07-16 | At&T Intellectual Property I, L.P. | Antenna structure for exchanging wireless signals |
US10359749B2 (en) | 2016-12-07 | 2019-07-23 | At&T Intellectual Property I, L.P. | Method and apparatus for utilities management via guided wave communication |
US10361489B2 (en) | 2016-12-01 | 2019-07-23 | At&T Intellectual Property I, L.P. | Dielectric dish antenna system and methods for use therewith |
US10374316B2 (en) | 2016-10-21 | 2019-08-06 | At&T Intellectual Property I, L.P. | System and dielectric antenna with non-uniform dielectric |
US10382976B2 (en) | 2016-12-06 | 2019-08-13 | At&T Intellectual Property I, L.P. | Method and apparatus for managing wireless communications based on communication paths and network device positions |
US10389029B2 (en) | 2016-12-07 | 2019-08-20 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system with core selection and methods for use therewith |
US10389037B2 (en) | 2016-12-08 | 2019-08-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for selecting sections of an antenna array and use therewith |
US10396887B2 (en) | 2015-06-03 | 2019-08-27 | At&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
US10411356B2 (en) | 2016-12-08 | 2019-09-10 | At&T Intellectual Property I, L.P. | Apparatus and methods for selectively targeting communication devices with an antenna array |
US10439675B2 (en) | 2016-12-06 | 2019-10-08 | At&T Intellectual Property I, L.P. | Method and apparatus for repeating guided wave communication signals |
US10446936B2 (en) | 2016-12-07 | 2019-10-15 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system and methods for use therewith |
US10498044B2 (en) | 2016-11-03 | 2019-12-03 | At&T Intellectual Property I, L.P. | Apparatus for configuring a surface of an antenna |
US10530505B2 (en) | 2016-12-08 | 2020-01-07 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves along a transmission medium |
US10535928B2 (en) | 2016-11-23 | 2020-01-14 | At&T Intellectual Property I, L.P. | Antenna system and methods for use therewith |
US10547348B2 (en) | 2016-12-07 | 2020-01-28 | At&T Intellectual Property I, L.P. | Method and apparatus for switching transmission mediums in a communication system |
US10601494B2 (en) | 2016-12-08 | 2020-03-24 | At&T Intellectual Property I, L.P. | Dual-band communication device and method for use therewith |
US10637149B2 (en) | 2016-12-06 | 2020-04-28 | At&T Intellectual Property I, L.P. | Injection molded dielectric antenna and methods for use therewith |
US10650940B2 (en) | 2015-05-15 | 2020-05-12 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US10665942B2 (en) | 2015-10-16 | 2020-05-26 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting wireless communications |
US10679767B2 (en) | 2015-05-15 | 2020-06-09 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US10694379B2 (en) | 2016-12-06 | 2020-06-23 | At&T Intellectual Property I, L.P. | Waveguide system with device-based authentication and methods for use therewith |
US10727599B2 (en) | 2016-12-06 | 2020-07-28 | At&T Intellectual Property I, L.P. | Launcher with slot antenna and methods for use therewith |
US10755542B2 (en) | 2016-12-06 | 2020-08-25 | At&T Intellectual Property I, L.P. | Method and apparatus for surveillance via guided wave communication |
US10777873B2 (en) | 2016-12-08 | 2020-09-15 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10784670B2 (en) | 2015-07-23 | 2020-09-22 | At&T Intellectual Property I, L.P. | Antenna support for aligning an antenna |
US10811767B2 (en) | 2016-10-21 | 2020-10-20 | At&T Intellectual Property I, L.P. | System and dielectric antenna with convex dielectric radome |
US10819035B2 (en) | 2016-12-06 | 2020-10-27 | At&T Intellectual Property I, L.P. | Launcher with helical antenna and methods for use therewith |
US10916969B2 (en) | 2016-12-08 | 2021-02-09 | At&T Intellectual Property I, L.P. | Method and apparatus for providing power using an inductive coupling |
US10938108B2 (en) | 2016-12-08 | 2021-03-02 | At&T Intellectual Property I, L.P. | Frequency selective multi-feed dielectric antenna system and methods for use therewith |
US11032819B2 (en) | 2016-09-15 | 2021-06-08 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a control channel reference signal |
US11362433B2 (en) * | 2017-10-27 | 2022-06-14 | Robert Bosch Gmbh | Radar sensor having a plurality of main beam directions |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5388679A (en) * | 1977-01-14 | 1978-08-04 | Yamato Shokaki Kk | Toxic gas adsorbing and neutralizing agent |
DE2738549A1 (en) * | 1977-08-26 | 1979-03-01 | Licentia Gmbh | Microwave antenna with homogeneous dielectric lens - uses two concentric hemi-spheres with different radii as lens, with specified radius relation |
GB8711271D0 (en) * | 1987-05-13 | 1987-06-17 | British Broadcasting Corp | Microwave lens & array antenna |
US9979459B2 (en) * | 2016-08-24 | 2018-05-22 | The Boeing Company | Steerable antenna assembly utilizing a dielectric lens |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2566703A (en) * | 1947-05-14 | 1951-09-04 | Rca Corp | Radio wave focusing device |
US2720589A (en) * | 1951-07-27 | 1955-10-11 | Sperry Rand Corp | Rapid scanning radar antenna |
US3230535A (en) * | 1961-12-26 | 1966-01-18 | Sylvania Electric Prod | Microwave scanning apparatus employing feed horn coupled to spaced lens by coaxial transmission lines |
US3404405A (en) * | 1965-04-30 | 1968-10-01 | Navy Usa | Luneberg lens with staggered waveguide feed |
-
1973
- 1973-05-07 US US00358242A patent/US3833909A/en not_active Expired - Lifetime
-
1974
- 1974-02-27 CA CA193,632A patent/CA1014263A/en not_active Expired
- 1974-03-12 JP JP49028448A patent/JPS5011351A/ja active Pending
- 1974-04-09 GB GB1556574A patent/GB1415994A/en not_active Expired
- 1974-04-22 IT IT50540/74A patent/IT1008461B/en active
- 1974-05-03 DE DE2421494A patent/DE2421494A1/en active Pending
- 1974-05-06 FR FR7415512A patent/FR2229149A1/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2566703A (en) * | 1947-05-14 | 1951-09-04 | Rca Corp | Radio wave focusing device |
US2720589A (en) * | 1951-07-27 | 1955-10-11 | Sperry Rand Corp | Rapid scanning radar antenna |
US3230535A (en) * | 1961-12-26 | 1966-01-18 | Sylvania Electric Prod | Microwave scanning apparatus employing feed horn coupled to spaced lens by coaxial transmission lines |
US3404405A (en) * | 1965-04-30 | 1968-10-01 | Navy Usa | Luneberg lens with staggered waveguide feed |
Cited By (238)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4001835A (en) * | 1975-05-12 | 1977-01-04 | Texas Instruments Incorporated | Scanning antenna with extended off broadside scanning capability |
US4156878A (en) * | 1978-01-25 | 1979-05-29 | The United States Of America As Represented By The Secretary Of The Air Force | Wideband waveguide lens |
US4531129A (en) * | 1983-03-01 | 1985-07-23 | Cubic Corporation | Multiple-feed luneberg lens scanning antenna system |
US4626858A (en) * | 1983-04-01 | 1986-12-02 | Kentron International, Inc. | Antenna system |
FR2582157A1 (en) * | 1985-05-15 | 1986-11-21 | Snecma | Antenna with reduced scanning step over a wide angular sector |
US6111523A (en) * | 1995-11-20 | 2000-08-29 | American Traffic Systems, Inc. | Method and apparatus for photographing traffic in an intersection |
US5948038A (en) * | 1996-07-31 | 1999-09-07 | American Traffic Systems, Inc. | Traffic violation processing system |
US6563477B2 (en) * | 1997-01-07 | 2003-05-13 | Murata Manufacturing Co. Ltd. | Antenna apparatus and transmission and receiving apparatus using same |
US6362795B2 (en) * | 1997-01-07 | 2002-03-26 | Murata Manufacturing Co., Ltd. | Antenna apparatus and transmission and receiving apparatus using the same |
US6426814B1 (en) | 1999-10-13 | 2002-07-30 | Caly Corporation | Spatially switched router for wireless data packets |
US6789744B2 (en) | 2002-01-29 | 2004-09-14 | Valeo Electrical Systems, Inc. | Fluid heater with a variable mass flow path |
US20040197094A1 (en) * | 2003-04-04 | 2004-10-07 | Amberg Michael T. | Fluid heater with compressible cover freeze protection |
US20110102098A1 (en) * | 2007-06-04 | 2011-05-05 | Helsinki University Of Technology | Structure for reducing scattering of electromagnetic waves |
US8164505B2 (en) | 2007-06-04 | 2012-04-24 | Aalto University Foundation | Structure for reducing scattering of electromagnetic waves |
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US10349418B2 (en) | 2015-09-16 | 2019-07-09 | At&T Intellectual Property I, L.P. | Method and apparatus for managing utilization of wireless resources via use of a reference signal to reduce distortion |
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US10009901B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method, apparatus, and computer-readable storage medium for managing utilization of wireless resources between base stations |
US10553943B2 (en) * | 2015-09-22 | 2020-02-04 | Qualcomm Incorporated | Low-cost satellite user terminal antenna |
US20170084994A1 (en) * | 2015-09-22 | 2017-03-23 | Qualcomm Incorporated | Low-cost satellite user terminal antenna |
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US10264586B2 (en) | 2016-12-09 | 2019-04-16 | At&T Mobility Ii Llc | Cloud-based packet controller and methods for use therewith |
US9838896B1 (en) | 2016-12-09 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for assessing network coverage |
US10340983B2 (en) | 2016-12-09 | 2019-07-02 | At&T Intellectual Property I, L.P. | Method and apparatus for surveying remote sites via guided wave communications |
US9973940B1 (en) | 2017-02-27 | 2018-05-15 | At&T Intellectual Property I, L.P. | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
US10298293B2 (en) | 2017-03-13 | 2019-05-21 | At&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
US11362433B2 (en) * | 2017-10-27 | 2022-06-14 | Robert Bosch Gmbh | Radar sensor having a plurality of main beam directions |
CN109378585B (en) * | 2018-10-19 | 2019-07-26 | 电子科技大学 | The circular polarisation Luneberg lens antenna of half space wave cover |
CN109378585A (en) * | 2018-10-19 | 2019-02-22 | 电子科技大学 | The circular polarisation Luneberg lens antenna of half space wave cover |
Also Published As
Publication number | Publication date |
---|---|
IT1008461B (en) | 1976-11-10 |
FR2229149A1 (en) | 1974-12-06 |
DE2421494A1 (en) | 1974-11-28 |
CA1014263A (en) | 1977-07-19 |
GB1415994A (en) | 1975-12-03 |
JPS5011351A (en) | 1975-02-05 |
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