US2825060A - Dual-polarization antenna - Google Patents

Dual-polarization antenna Download PDF

Info

Publication number
US2825060A
US2825060A US462826A US46282654A US2825060A US 2825060 A US2825060 A US 2825060A US 462826 A US462826 A US 462826A US 46282654 A US46282654 A US 46282654A US 2825060 A US2825060 A US 2825060A
Authority
US
United States
Prior art keywords
wave
ridges
substantially
horn portion
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US462826A
Inventor
Ruze John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GABRIEL CO
Original Assignee
GABRIEL CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GABRIEL CO filed Critical GABRIEL CO
Priority to US462826A priority Critical patent/US2825060A/en
Application granted granted Critical
Publication of US2825060A publication Critical patent/US2825060A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02Waveguide horns
    • H01Q13/025Multimode horn antennas; Horns using higher mode of propagation
    • H01Q13/0258Orthomode horns

Description

Feb. 25'; 1958 J. RUZE DUAL-POLARIZATION ANTENNA Filed Oct. 18. 1954 INVENTOR. JOHN RUZE BY I A TTORNE Y6 United States Patent DUAL-POLARIZATION ANTENNA John Ruze, Boston, Mass., assignor to The Gabriel Company, Cleveland, Ohio, a corporation of Ohio Application October 18, 1954, Serial No. 462,826

13 Claims. (Cl. 343-756) The present invention relates to antennas and more particularly to antenna systems operating with radio waves of complementary polarizations.

Various proposals have heretofore been made for simultaneously transmitting or receiving radio waves of differing electric-vector polarizations. Perhaps the most elementary of these proposals is the use of a plurality of dipole or other linear antennas, one oriented along each direction of polarization. To generate or receive circularly polarized waves, for example, which may be considered as the resultant of a horizontally polarized wave and a vertically polarized wave phase-displaced from the horizontally polarized wave by plus or minus ninety degrees, two perpendicularly oriented antennas have been employed. Because of the physical juxtaposition of such antennas, however, a certain amount of cross-polarization reception or transmission occurs. Some of the horizontally polarized energy, as an illustration, may induce a voltage in the vertically polarized antenna, and vice versa. This is particularly true in the ultra-highfrequency and microwave ranges where even the thickness dimension of an antenna may be an appreciable-portion of the wavelength and thus capable of intercepting cross-polarization energy. Cross coupling is also increased in the case where a common transmission system is employed and especially in waveguide microwave systems where the cross coupling could exist due to in-, advertently generated higher order modes. While this is tolerable in some systems, there are other occasions where it is entirely undesirable. As an illustration, it may be necessary to receive in a radio receiver a weak polarized radio-wave signal in the presence of a strong transmitted difierently polarized signal. Attempts have therefore been made to minimize cross-polarization effects through careful construction, orientation and symmetry of the antenna system but such techniques do not solve the problem in cases where there are very rigid requirements as to the amount of allowable cross-coupling, such as where the coupled transmitted signal is of the order of the amplitude or greater than the amplitude of the received signal itself.

An object of the present invention, therefore, is to provide a new and improved antenna system in which crosspolarization effects are minimized.

A further object is to provide a novel dual-polarization antenna system.

An additional object is to provide such an antenna system that is particularly adapted for the ultra-high-frequency and microwave frequency ranges of the radio spectrum where wave-guide techniques are employed. In summary, the present invention employs a pair of symmetrical substantially planar conducting ridges or septums preferably mounted within a flaring horn portion of a waveguide system and each extending inward from oppositely disposed flaring walls of the horn portion in substantially the same plane. This plane is, in turn, substantially perpendicular to one of the radio-wave elecice tric-vector polarizations to be employed in the wave-guide system. The inner edges of the septums diverge from each other toward the mouth of the horn portion with the separation between the adjacent opposite walls of the wave guide being too small at the throat of the horn portion but sufficient at the mouth thereof to permit a wave-guided propagation of radio waves of electric-vector polarization substantially perpendicular to the said one polarization. The two-conductor balanced transmission lines formed by the opposite faces of the ridges launches or receives radio-frequency energy that is to propagate as radio waves of the perpendicular polarization in the remaining portion of the wave-guide horn. This balanced transmission line is excited by a coaxial line, the outer conductor being connected to the adjacent ridge and the inner conductor to the other ridge. Preferred constructional details are hereinafter fully described.

Other and further objects will be hereinafter discussed and will be more particularly pointed out in the appended claims.

The invention will now be described in connection with the accompanying drawing the single figure of which is a perspective view of the invention in preferred form, parts being shown broken away to illustrate details of construction.

A wave-guide transmitting or receiving antenna is shown comprising a flared preferably pyramidal horn portion 1 of rectangular cross-section terminating at its throat 3 in a preferably rectangular wave guide portion 5 of substantially uniform cross-section. As will be evident from the description of operation to follow, other types of cross-sectional configurations, horns and/ or guides may be employed, though the illustrated embodiment is preferred for the particular application of the invention in which the wave-guide system is disposed at the focal region of a large paraboloidal reflector, not shown, designed to receive weak radio signals. The wave guide is shown oriented so that the upper and lower walls are the longer walls of the guide, but the apparatus may be equally well oriented in any other desired position.

While the cross-polarization-elimination techniques of the invention, moreover, may be similarly used for radio transmission, they will hereinafter be described as applied to the above-mentioned weak-signal receiving system and transmission of strong signals.

With the antenna 15 oriented as shown, it is adapted to transmit or receive radio waves of complimentary polarization. A probe antenna 7, for example, may launch or absorb vertically polarized waves, and a probe 9, horizontally polarized waves. Appropriate receiving or transmitting apparatus, not shown, may be connected to the probes as is well known. If desired, the vertically polarized waves may be launched or absorbed at a point remote from the wave-guide section or portion 5 in which event the probe 7 may be dispensed with and a further wave-guide section, not shown, may be attached to the portion 5 at the flange 11. The width W of the waveguide portion 5 is sufficient, that is, equal to or greater than the half-wave length of the radio energy, to permit the progagation therein of, for example, the TE mode of wave of a predetermined frequency with the electricvector vertically oriented parallel to the probe 7. The length of the wave-guide section 5 must, however, be made sufiiciently long to attenuate any higher order modes that are inherently generated by the probe 7 but are non-propagating in the section 5.

The probe 9, however, is an extension of an inner conductor 13 of a coaxial transmission line. The outer conductor 15 of the coaxial transmission line is shown connected at 19 to the side wall 17 of the horn portion 1 of 3 the antenna, preferably near the throat 3. Insulator supporting spacers, such as 33, may maintain the inner and outer conductors out of electrical contact, as is well known. The two-conductor transmission line 13, 15 will connect the probe 9 to an appropriate receiver or transmitter, not shown, as before explained. Other types of twoconductor transmission lines besides the coaxial type may be employed in connection with both the probes 9 and 7, but the coaxial type has certain advantages including the shielding of the inner conductor 13 by the outer conductor 15. The horizontal probe 9 is shown extending within the horn portion 1 near the throat 3 through an aperture 21 in a conductive planar ridge or septum 23, terminating at 27 within a similar conductive ridge or septum 25. Supporting insulator spacers 29 prevent electrical contact between the probe 9 and the aperture 21. The ridges 23 and 25 are preferably of the same roughly triangular shape, or special gradual shape for use in broad-banding, each having one side secured to the respective flaring walls 17 and 18 of the horn portion 1. They are shown symmetrically disposed within substantially the same horizontal plane, midway between the upper and lower walls of the horn portion 1. From the inner adjacent spaced vertices 22 and 24 of the respective septums 23 and 25, the inner edges 26 and 28 of the septums diverge as they extend toward the mouth 29 of the horn portion 1. They preferably diverge along a somewhat gradual curve, as illustrated, from a separation W at the vertices 22 and 24 to a separation substantially equal to the full width of the mouth 29. The separation of the opposite walls of the wave guide is made too small, however, in the throat region, to permit wave-guide propagation of Waves of the said predetermined frequency and of a polarization parallel to the probe 9. As the separation between the diverging edges 26 and 28 increases toward the mouth 29, however, the separation between the opposite walls 17, 18 becomes large enough to permit of wave-guiding within the horn portion 1 of such waves. These Waves may, for example, be of TE mode. Since the probe extension 9 of the inner coaxial-line conductor 13 terminates at 27 upon the septum 25, preferably just to the left of the vertex 24, as shown, and the outer conductor 15 terminates at 19 upon the wall 17 and hence upon the septum 23 secured thereto, radio-frequency energy in the coaxial line 13, 15 will be propagated, not as wave-guided radio waves, but as two-conductor transmission-line-propagated radio-frequency energy between the ridges or septums 23 and 25. The ridges or septums, indeed, act merely as extensions of the respective two-conductor transmission-line conductors 15 and 139 until the separation between the wave-guiding walls adjacent the septums 23 and 25 becomes wide enough to permit propagation of the energy as uni-conductor wave-guided waves of, for example, the TE mode. At the point where the transmission-line ridges 23, 25 and the guiding walls 17 and 18 adjacent thereto are separated a sufiicient distance to permit the TE mode to propagate, there will be a gradual transfer of the energy from the two-conductor transmission-line propagation mode to the wave-guide mode. The relative amount of energy in each mode depends upon the characteristic impedance of the transmission-line and wave-guiding systems, so that when the ridges 23 and 25 blend into the Walls 17 and 18, near the mouth of the horn 1, all of the energy is propagated in the wave-guide mode.

The manner in which this construction substantially completely eliminates cross-polarization effects between radio waves of electric-vector polarization parallel to the respective perpendicularly oriented probes 7 and 9 will now be explained. Energy polarized parallel to the plane of the ridges 23, 25 will not propagate toward the probe 7 as the section is below cut-off for this polarization and this section 5 can be made of sufiicient length to provide adequate attenuation. Waves of polarization parallel to the probe 7, however, can pass right by the septums 23 and 25 since the septums lie in a plane perpendicular to the probe 7. There will be some crosspolarization vertically polarized energy induced in the septums 23 and 25 because they have a small vertical or thickness dimension. In view of the symmetrical or balanced placement of the ridges or septums 23, 25, however, any vertically polarized voltage set up on one side of the horizontal probe 9 on one septum will be balanced by a similar voltage on the septum on the other side of the probe 9. The probe 9 will therefore not pick up any vertically polarized energy. In actual practice, indeed, this structure has been found to produce almost complete cancellation of cross-polarized voltages. By making the ridges slightly unsymmetrical, furthermore, the cancellation can be rendered substantially complete over a wide band of frequencies.

In order to compensate for reflections from the edges 35 and 37 of the septums 23 and 25 facing the probe 7, the edges 35 and 37 are preferably also caused to diverge away from the vertices 22 and 24 but toward the throat 3, the angle of divergence being very much greater than that subtended by the septum edges 26 and 28. Energy reflected from successive regions along the diverging edges 35 and 37 will travel successively different paths producing an overall at least partial cancellation effect. This effect and proper matching may be further attained through the use of one or more capacitive irises 36 mounted upon the upper and preferably also upon the lower inner walls of the wave-guide-portion 5 and extending inward of the guide in a plane or planes substantially parallel to the probe 7. Alternately, an inductive iris or other means may be used as is well known in impedance-matching techniques.

If the invention is used with energy of the same frequency at the probes 7 and 9, the polarization diversity effects of the invention are produced. Additional frequency diversity can also be achieved, however, if different frequencies are used. The horn 1, moreover, may be closed at its month by any well-known radio-permeable window 2 and the whole interior may be sealed with any desired gas at any desired pressure.

Further modifications will occur to those skilled in the art and all such are considered to fall within the spirit and scope of the invention as defined in the appended claims.

What is claimed is:

1. A wave guide having, in combination, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization, a pair of substantially planar conducting ridges disposed within the wave guide displaced from the first-named means and each extending inward of the wave guide in substantially the same plane substantially perpendicular to the said predetermined direction, the inner edges of the ridges being separated along the complete length thereof and shaped to provide a successively increasing separation therebetween from a first region where the separation between opposite walls of the wave guide adjacent the ridges is too small to permit of wave-guided propagation within the wave guide of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction to a second region thereof where the separation is sufficient to permit of such wave-guided propagation within the wave guide, and means comprising a two-conductor transmission line having one conductor connected to one ridge and the other conductor extending between the ridges near the said first region and terminating upon the other ridge.

2. A wave guide having, in combination, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization, a pair of substantially planar conducting ridges disposed within the wave guide displaced from the first-named means and each extending inward of the wave guide in substantially the same plane substantially perpendicular to the said predetermined direction, the inner edges of the ridges being separated along the complete length thereof and shaped to provide a succesively increasing separation therebetween from a first region where the separation between opposite walls of the wave-guide adjacent the ridges is too small to permit of wave-guided propagation within the wave guide of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction to a second region thereof where the separation is suflicient to permit of such waveguided propagation within the wave guide, and means comprising a coaxial transmission line having its outer conductor connected to a portion of the wave-guide wall adjacent one ridge and hence connected to the said one ridge and its inner conductor extending in a direction substantially perpendicular to the said predetermined direction through an aperture in the said one ridge, between the ridges near the said first region and terminating upon the other ridge.

3. A wave guide having, in combination, a portion of substantially uniform cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization, a pair of substantially planar conducting ridges disposed within the horn portion of the wave guide and extending inward from oppositely disposed flaring walls of the same in substantially the same plane substantially perpendicular to the said predetermined direction, the inner edges of the ridges being separated along the complete length thereof and diverging from each other toward the mouth of the horn portion with the separation between the opposite walls of the wave guide being too small at the throat of the horn portion to permit of wave-guided propagation within the horn portion of radio waves of electricvector polarization substantially perpendicular to the said predetermined direction and suflicient to permit of such wave-guided propagation near the mouth of the horn portion, and means comprising a two-conductor transmission line having one conductor connected to one ridge and the other conductor extending between the ridges near the throat of the horn portion and terminating upon the other ridge.

4. A wave guide having, in combination, a portion of substantially uniform cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization, a pair of substantially planar conducting ridges disposed within the horn portion of the wave guide and extending inward from oppositely disposed flaring walls of the same in substantially the same plane substantially perpendicular to the said predetermined direction, the inner edges of the ridges being separated along the complete length thereof and diverging from each other toward the mouth of the horn portion with the separation between the opposite walls of the wave guide being too small at the throat of the horn portion to permit of wave-guided propagation within the horn portion of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction and sutficient to permit of such wave. guided propagation near the mouth of the horn portion, and means comprising a coaxial two-conductor transmission line having its outer conductor connected to a portion of the wave-guide wall adjacent one ridge, and hence connected to the said one ridge and its inner conductor extending in a direction substantially perpendicular to the said predetermined direction through an aperture in the said one ridge, between the ridges near the throat of the horn portion and terminating upon the other ridge.

5. A wave guide having, in combination, a portion of substantially uniform cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization, a pair of substantially planar triangular conducting ridges disposed within the horn portion of the wave guide and extending inward from oppositely disposed flaring walls of the same in substantially the same plane substantially perpendicular to the said predetermined direction, the inner edges of the substantially triangular ridges forming the sides of the triangles nearer the mouth of the horn portion being separated along the complete length thereof and diverging from each other toward the said mouth with the separation between the opposite walls of the wave guide increasing from a value at the adjacent inner vertices of the substantially triangular ridges too small to permit of wave-guided propagation within the horn portion of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction to a value suflicient to permit of such wave-guided propagation near the said mouth of the horn portion, the inner edges of the sides of the triangles nearer the throat of the horn portion more rapidly diverging from each other toward the said throat, and means comprising a twoconductor transmission line having one conductor connected to one ridge and the other conductor extending between the ridges near the said throat and terminating upon the other ridge.

6. A wave guide having, in combination, a portion of substantially uniform cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization, a pair of substantially planar triangular conducting ridges disposed within the horn portion of the wave guide and extending inward from oppositely disposed flaring walls of the same in substantially the same plane substantially perpendicular to the said predetermined direction and substantially symmetrically disposed within the horn portion of the wave guide, the inner edges of the substantially triangular ridges forming the sides of the triangles nearer the mouth of the horn portion being separated along the complete length thereof and diverging from each other toward the said mouth with the separation between the opposite walls of the wave guide increasing from a value at the adjacent inner vertices of the substantially triangular ridges too small to permit of wave-guided propagation within the horn portion of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction to a value suflicient to permit of such wave-guided propagation near the said mouth of the horn portion, the inner edges of the sides of the triangles nearer the throat of the horn portion more rapidly diverging from each other toward the said throat, and means comprising a coaxial two-conductor transmission line having its outer conductor connected to a portion of the wave-guide wall adjacent one ridge and hence connected to the said one ridge and its inner conductor extending in a direction substantially perpendicular to the said predetermined direction through an aperture in the said one ridge, between the said adjacent inner vertices of the ridges and terminating upon the said inner vertex of the other ridge.

7. A wave guide of substantially rectangular crosssection having, in combination, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization substantially parallel to the shorter wave-guide walls, a pair of substantially planar conducting ridges disposed within the wave guide displacedv from the first-named means and each extending inward of the wave guide from one of the said shorter walls in substantially the same plane substantially perpendicular to the said shorter walls, the inner edges of the ridges being separated along the complete length thereof and shaped to provide a successively increasing separation therebetween from a first region where the separation between the opposite shorter walls of the wave guide adjacent the ridges is too small to permit of wave-guided propagation within the wave guide of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction to a second region thereof where the separation is sufficient to permit of such wave-guided propagation within the wave guide, and means comprising a two-conductor transmission line having one conductor connected to one ridge and the other conductor extending between the ridges near the said-first region and terminating upon the other ridge.

8. A wave guide of substantially rectangular crosssection having, in combination, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization substantially parallel to the shorter wave-guide walls, a pair of substantially planar conducting ridges disposed within the wave guide displaced from the first-named means and each extending inward of the Wave guide from one of the said shorter walls in substantially the same plane substantially perpendicular to the said shorter walls, the inner edges of the ridges being separated along the complete length thereof and shaped to provide a successively increasing separation therebetween from a first region where the separation between the opposite shorter walls of the wave guide adjacent the ridges is too small to permit of wave-guided propagation within the wave guide of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction to a second region thereof where the separation is sufficient to permit of such wave-guided propagation within the wave guide, and means comprising a coaxial transmission line having its outer conductor connected to a portion of one of the shorter walls adjacent one ridge and hence connected to the said one ridge and its inner conductor extending in a direction substantially perpendicular to the said predetermined direction through an aperture in the said one ridge, between the ridges near the said first region and terminating upon the other ridge.

9. A wave guide having, in combination, a portion of substantially uniform rectangular cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization substantially parallel to the shorter waveguide walls, a pair of substantially planar conducting ridges disposed within the horn portion of the wave guide and extending inward from the oppositely disposed flaring shorter walls of the same in substantially the same plane substantially perpendicular to the said shorter walls, the inner edges of the ridges being separated along the complete length thereof and diverging from each other toward the mouth of the horn portion with the separation between the shorter walls of the wave guide being too small at the throat of the horn portion to permit of waveguided propagation within the horn portion of radio Waves of electric-vector polarization substantially perpendicular to the said predetermined direction and sufficient to permit of such wave-guided propagation near the mouth of the horn portion, and means comprising a twoconductor transmission line having one conductor connected to one ridge and the other conductor extending between the ridges near the throat of the horn portion and terminating upon the other ridge.

10. A wave guide having, in combination, a portion of substantially uniform rectangular cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization substantially parallel to the shorter waveguide walls, a pair of substantially planar conducting ridges disposed within the horn portion of the wave guide and extending inward from the oppositely disposed flaring shorter walls of the same in substantially the same plane substantially perpendicular to the said shorter walls, the inner edges of the ridges being separated along the complete length thereof and diverging from each other toward the mouth of the horn portion with the separation between the shorter walls of the wave guide being too small at the throat of the horn portion to permit of wave-guided propagation within the horn portion of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction and sufiicient to permit of such wave-guided propagation near the mouth of the horn portion, and means comprising a coaxial transmission line having its outer conductor connected to a portion of the wave-guide wall adjacent one ridge and hence connected to the said one ridge and its inner conductor extending in a direction substantially perpendicular to the said predetermined direction through an aperture in the said one ridge, between the ridges near the throat of the horn portion and terminating upon the other ridge.

11. A wave guide having, in combination, a portion of substantially uniform rectangular cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization substantially parallel to the shorter waveguide walls, a pair of substantially planar triangular conducting ridges disposed within the horn portion of the wave guide and extending inward from the oppositely disposed flaring shorter walls of the same in substantially the same plane substantially perpendicular to the said shorter walls, the inner edges of the substantially triangular ridges forming the sides of the triangles nearer the mouth of the horn portion being separated along the complete length thereof and diverging from each other toward the said mouth with the separation between the shorter walls of the wave guide increasing from a value at the adjacent inner vertices of the substantially triangular ridges too small to permit of wave-guided propagation within the horn portion of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction to a value sufiicient to permit of such wave-guided propagation near the said mouth of the horn portion, the inner edges of the sides of the triangles nearer the throat of the horn portion more rapidly diverging from each other toward the said throat, and means comprising a two-conductor transmission line having one conductor connected to one ridge and the other conductor extending between the ridges near the said throat and terminating upon the other ridge.

12. A wave guide having, in combination, a portion of substantially uniform rectangular cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization substantially parallel to the shorter waveguide walls, a pair of substantially planar triangular conducting ridges disposed within the horn portion of the wave guide and extending inward from the oppositely disposed flaring shorter walls of the same in substantially the same plane substantially perpendicular to the said short er walls and substantially symmetrically disposed between the longer walls of the horn portion of the wave guide, the inner edges of the substantially triangular ridges forming the sides of the triangles nearer the mouth of the horn portion being separated along the complete length thereof and diverging from each other toward the said mouth with the separation between the shorter walls of the guide increasing from a value at the adjacent inner vertices of the substantially triangular ridges too small to permit of wave-guided propagation within the horn portion of radio waves of electric-vector polarization substantially perpendicular to the said predetermined direction to a value suflicient to permit of such wave-guided propagation near the said mouth of the horn portion, the inner edges of the sides of the triangles nearer the throat of the horn portion more rapidly diverging from each other toward the said throat, and means comprising a coaxial transmission line having its outer conductor connected to a portion of the wave-guide wall adjacent one ridge and hence connected to the said one ridge and its inner conductor extending in a direction substantially perpendicular to the said predetermined direction through an aperture in the said one ridge, between the said adjacent inner vertices of the ridges and terminating upon the said inner vertex of the other ridge.

13. A wave guide having, in combination, a portion of substantially uniform rectangular cross-section terminating in an outwardly flaring horn portion, means for launching or receiving radio waves of a predetermined frequency and a predetermined direction of electric-vector polarization substantially parallel to the shorter waveguide walls, a pair of substantially planar triangular conducting ridges disposed within the horn portion of the wave guide and extending inward from the oppositely disposed flaring shorter walls of the same in substantially the same plane substantially perpendicular to the said shorter walls and substantially symmetrically disposed between the longer walls of the horn portion of the wave guide, the inner edges of the substantially triangular ridges forming the sides of the triangles nearer the mouth of the horn portion being separated along the complete length thereof and diverging from each other toward the said mouth with the separation between the shorter walls of the wave guide increasing from a value at the adjacent inner vertices of the substantially triangular ridges too small to permit of wave-guided propagation within the horn portion ofiradio Waves of electricvector polarization substantially perpendicular to the said predetermined direction to a value sufficient to permit of such wave-guided propagation near the said mouth of the horn portion, the inner edges of the sides of the triangles nearer the throat of the horn portion more rapidly diverging from each other'toward the said throat, and means comprising a coaxial two-conductor transmission line having its outer conductor connected to a portion of the wave-guide wall adjacent one ridge and hence connected to the said one ridge and its inner conductor extending in a direction substantially perpendicular to the said predetermined direction through an aperture in the said one ridge, between the said adjacent inner vertices of the ridges and terminating upon the said inner vertex of the other ridge, and conductive iris means extending substantially parallel to the said predetermined direction and disposed within the wave-guide portion of substantially uniform cross-section.

References Cited in the file of this patent UNITED STATES PATENTS

US462826A 1954-10-18 1954-10-18 Dual-polarization antenna Expired - Lifetime US2825060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US462826A US2825060A (en) 1954-10-18 1954-10-18 Dual-polarization antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US462826A US2825060A (en) 1954-10-18 1954-10-18 Dual-polarization antenna

Publications (1)

Publication Number Publication Date
US2825060A true US2825060A (en) 1958-02-25

Family

ID=23837908

Family Applications (1)

Application Number Title Priority Date Filing Date
US462826A Expired - Lifetime US2825060A (en) 1954-10-18 1954-10-18 Dual-polarization antenna

Country Status (1)

Country Link
US (1) US2825060A (en)

Cited By (127)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943324A (en) * 1957-11-01 1960-06-28 Itt Dual frequency dual polarization horn antenna
US2944258A (en) * 1958-07-25 1960-07-05 Dean K Yearout Dual-ridge antenna
US2961659A (en) * 1957-06-12 1960-11-22 Gen Electric Signal processing arrangement having septum divided horn
US3100894A (en) * 1960-03-09 1963-08-13 Bendix Corp Dual frequency feed horn
US3784933A (en) * 1971-05-03 1974-01-08 Textron Inc Broadband balun
US3789406A (en) * 1965-09-25 1974-01-29 Siemens Ag Albis Apparatus for simultaneously transmitting and receiving as well as mixing transmitted and received waves
US4554552A (en) * 1981-12-21 1985-11-19 Gamma-F Corporation Antenna feed system with closely coupled amplifier
US4658267A (en) * 1984-10-31 1987-04-14 Raytheon Company Ridged waveguide antenna with plural feed inputs
US4672384A (en) * 1984-12-31 1987-06-09 Raytheon Company Circularly polarized radio frequency antenna
US4686491A (en) * 1985-10-22 1987-08-11 Chaparral Communications Dual probe signal receiver
WO1988002933A1 (en) * 1986-10-20 1988-04-21 Hughes Aircraft Company Orthogonal mode electromagnetic wave launcher
US4878061A (en) * 1988-11-25 1989-10-31 Valentine Research, Inc. Broadband wide flare ridged microwave horn antenna
US4962384A (en) * 1986-03-06 1990-10-09 Walker Charles W E Microwave antenna apparatus
US5305000A (en) * 1990-08-06 1994-04-19 Gardiner Communications Corporation Low loss electromagnetic energy probe
US8478223B2 (en) 2011-01-03 2013-07-02 Valentine Research, Inc. Methods and apparatus for receiving radio frequency signals
EP2629360A1 (en) 2012-02-20 2013-08-21 Azure Shine International Inc. Low noise block downconverter (LNB) with high isolation
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
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
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
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
US9674711B2 (en) 2013-11-06 2017-06-06 At&T Intellectual Property I, L.P. Surface-wave communications and methods thereof
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
US9699785B2 (en) 2012-12-05 2017-07-04 At&T Intellectual Property I, L.P. Backhaul link for 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
US9705610B2 (en) 2014-10-21 2017-07-11 At&T Intellectual Property I, L.P. Transmission device with impairment compensation 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
US9742521B2 (en) 2014-11-20 2017-08-22 At&T Intellectual Property I, L.P. Transmission device with mode division multiplexing and methods for use therewith
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
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
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
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
US9768833B2 (en) 2014-09-15 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves
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
US9780834B2 (en) 2014-10-21 2017-10-03 At&T Intellectual Property I, L.P. Method and apparatus for transmitting electromagnetic waves
US9787412B2 (en) 2015-06-25 2017-10-10 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a fundamental wave mode on a transmission medium
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
US9793955B2 (en) 2015-04-24 2017-10-17 At&T Intellectual Property I, Lp Passive electrical 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
US9838078B2 (en) 2015-07-31 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for exchanging communication signals
US9838896B1 (en) 2016-12-09 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for assessing network coverage
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
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
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
US9866276B2 (en) 2014-10-10 2018-01-09 At&T Intellectual Property I, L.P. Method and apparatus for arranging communication sessions in a communication system
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
US9866309B2 (en) 2015-06-03 2018-01-09 At&T Intellectual Property I, Lp Host node device and methods for use therewith
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
US9871558B2 (en) 2014-10-21 2018-01-16 At&T Intellectual Property I, L.P. Guided-wave transmission device and methods for use therewith
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
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
US9876264B2 (en) 2015-10-02 2018-01-23 At&T Intellectual Property I, Lp Communication system, guided wave switch and methods for use therewith
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
US9887447B2 (en) 2015-05-14 2018-02-06 At&T Intellectual Property I, L.P. Transmission medium having multiple cores and methods for use therewith
US9893795B1 (en) 2016-12-07 2018-02-13 At&T Intellectual Property I, Lp Method and repeater for broadband distribution
US9906269B2 (en) 2014-09-17 2018-02-27 At&T Intellectual Property I, L.P. Monitoring and mitigating conditions in a communication network
US9904535B2 (en) 2015-09-14 2018-02-27 At&T Intellectual Property I, L.P. Method and apparatus for distributing software
US9913139B2 (en) 2015-06-09 2018-03-06 At&T Intellectual Property I, L.P. Signal fingerprinting for authentication of communicating devices
US9912027B2 (en) 2015-07-23 2018-03-06 At&T Intellectual Property I, L.P. Method and apparatus for exchanging communication signals
US9912382B2 (en) 2015-06-03 2018-03-06 At&T Intellectual Property I, Lp Network termination and methods for use therewith
US9912033B2 (en) 2014-10-21 2018-03-06 At&T Intellectual Property I, Lp Guided wave coupler, coupling module 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
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
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
US9930668B2 (en) 2013-05-31 2018-03-27 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9948333B2 (en) 2015-07-23 2018-04-17 At&T Intellectual Property I, L.P. Method and apparatus for wireless communications to mitigate interference
US9948355B2 (en) 2014-10-21 2018-04-17 At&T Intellectual Property I, L.P. Apparatus for providing communication services and methods thereof
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
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
US9954286B2 (en) 2014-10-21 2018-04-24 At&T Intellectual Property I, L.P. Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith
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
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
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
US10009067B2 (en) 2014-12-04 2018-06-26 At&T Intellectual Property I, L.P. Method and apparatus for configuring a communication interface
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
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
US10027398B2 (en) 2015-06-11 2018-07-17 At&T Intellectual Property I, Lp Repeater and methods for use therewith
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
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
US10044409B2 (en) 2015-07-14 2018-08-07 At&T Intellectual Property I, L.P. Transmission medium and methods for use therewith
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
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
US10090594B2 (en) 2016-11-23 2018-10-02 At&T Intellectual Property I, L.P. Antenna system having structural configurations for assembly
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
US10103801B2 (en) 2015-06-03 2018-10-16 At&T Intellectual Property I, L.P. Host node device and methods for use therewith
US10103422B2 (en) 2016-12-08 2018-10-16 At&T Intellectual Property I, L.P. Method and apparatus for mounting network devices
US10135146B2 (en) 2016-10-18 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via circuits
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
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
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
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
US10142086B2 (en) 2015-06-11 2018-11-27 At&T Intellectual Property I, L.P. Repeater and methods for use therewith
US10148016B2 (en) 2015-07-14 2018-12-04 At&T Intellectual Property I, L.P. Apparatus and methods for communicating utilizing an antenna array
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
US10168695B2 (en) 2016-12-07 2019-01-01 At&T Intellectual Property I, L.P. Method and apparatus for controlling an unmanned aircraft
US10170840B2 (en) 2015-07-14 2019-01-01 At&T Intellectual Property I, L.P. Apparatus and methods for sending or receiving electromagnetic signals
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
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
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
US10243784B2 (en) 2014-11-20 2019-03-26 At&T Intellectual Property I, L.P. System for generating topology information and methods thereof
US10264586B2 (en) 2016-12-09 2019-04-16 At&T Mobility Ii Llc Cloud-based packet controller and methods for use therewith
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
US10291334B2 (en) 2016-11-03 2019-05-14 At&T Intellectual Property I, L.P. System for detecting a fault in a communication 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
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
US10326689B2 (en) 2016-12-08 2019-06-18 At&T Intellectual Property I, L.P. Method and system for providing alternative communication paths
US10340601B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Multi-antenna system and methods for use therewith

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362561A (en) * 1940-12-12 1944-11-14 Rca Corp Horn radiator
US2514779A (en) * 1947-05-14 1950-07-11 Rca Corp Wave guide system
US2691731A (en) * 1951-02-21 1954-10-12 Westinghouse Electric Corp Feed horn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362561A (en) * 1940-12-12 1944-11-14 Rca Corp Horn radiator
US2514779A (en) * 1947-05-14 1950-07-11 Rca Corp Wave guide system
US2691731A (en) * 1951-02-21 1954-10-12 Westinghouse Electric Corp Feed horn

Cited By (158)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961659A (en) * 1957-06-12 1960-11-22 Gen Electric Signal processing arrangement having septum divided horn
US2943324A (en) * 1957-11-01 1960-06-28 Itt Dual frequency dual polarization horn antenna
US2944258A (en) * 1958-07-25 1960-07-05 Dean K Yearout Dual-ridge antenna
US3100894A (en) * 1960-03-09 1963-08-13 Bendix Corp Dual frequency feed horn
US3789406A (en) * 1965-09-25 1974-01-29 Siemens Ag Albis Apparatus for simultaneously transmitting and receiving as well as mixing transmitted and received waves
US3784933A (en) * 1971-05-03 1974-01-08 Textron Inc Broadband balun
US4554552A (en) * 1981-12-21 1985-11-19 Gamma-F Corporation Antenna feed system with closely coupled amplifier
US4658267A (en) * 1984-10-31 1987-04-14 Raytheon Company Ridged waveguide antenna with plural feed inputs
US4672384A (en) * 1984-12-31 1987-06-09 Raytheon Company Circularly polarized radio frequency antenna
US4686491A (en) * 1985-10-22 1987-08-11 Chaparral Communications Dual probe signal receiver
US4962384A (en) * 1986-03-06 1990-10-09 Walker Charles W E Microwave antenna apparatus
JPH01501035A (en) * 1986-10-20 1989-04-06
WO1988002933A1 (en) * 1986-10-20 1988-04-21 Hughes Aircraft Company Orthogonal mode electromagnetic wave launcher
US4878061A (en) * 1988-11-25 1989-10-31 Valentine Research, Inc. Broadband wide flare ridged microwave horn antenna
US5305000A (en) * 1990-08-06 1994-04-19 Gardiner Communications Corporation Low loss electromagnetic energy probe
US8478223B2 (en) 2011-01-03 2013-07-02 Valentine Research, Inc. Methods and apparatus for receiving radio frequency signals
EP2629360A1 (en) 2012-02-20 2013-08-21 Azure Shine International Inc. Low noise block downconverter (LNB) with high isolation
US9788326B2 (en) 2012-12-05 2017-10-10 At&T Intellectual Property I, L.P. Backhaul link for distributed antenna system
US9699785B2 (en) 2012-12-05 2017-07-04 At&T Intellectual Property I, L.P. Backhaul link for distributed antenna system
US10194437B2 (en) 2012-12-05 2019-01-29 At&T Intellectual Property I, L.P. Backhaul link for distributed antenna system
US10009065B2 (en) 2012-12-05 2018-06-26 At&T Intellectual Property I, L.P. Backhaul link for distributed antenna system
US9930668B2 (en) 2013-05-31 2018-03-27 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9999038B2 (en) 2013-05-31 2018-06-12 At&T Intellectual Property I, L.P. Remote distributed antenna system
US10051630B2 (en) 2013-05-31 2018-08-14 At&T Intellectual Property I, L.P. Remote distributed antenna system
US10091787B2 (en) 2013-05-31 2018-10-02 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9674711B2 (en) 2013-11-06 2017-06-06 At&T Intellectual Property I, L.P. Surface-wave communications 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
US10096881B2 (en) 2014-08-26 2018-10-09 At&T Intellectual Property I, L.P. Guided wave couplers for coupling electromagnetic waves to an outer surface of a transmission medium
US9768833B2 (en) 2014-09-15 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves
US9906269B2 (en) 2014-09-17 2018-02-27 At&T Intellectual Property I, L.P. Monitoring and mitigating conditions in a communication network
US10063280B2 (en) 2014-09-17 2018-08-28 At&T Intellectual Property I, L.P. Monitoring and mitigating conditions in a communication network
US9973416B2 (en) 2014-10-02 2018-05-15 At&T Intellectual Property I, L.P. Method and apparatus that provides fault tolerance in a communication network
US9998932B2 (en) 2014-10-02 2018-06-12 At&T Intellectual Property I, L.P. Method and apparatus that provides fault tolerance in a communication network
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
US9685992B2 (en) 2014-10-03 2017-06-20 At&T Intellectual Property I, L.P. Circuit panel network and methods thereof
US9866276B2 (en) 2014-10-10 2018-01-09 At&T Intellectual Property I, L.P. Method and apparatus for arranging communication sessions in a communication system
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
US9973299B2 (en) 2014-10-14 2018-05-15 At&T Intellectual Property I, L.P. Method and apparatus for adjusting a mode of communication in a communication network
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
US9960808B2 (en) 2014-10-21 2018-05-01 At&T Intellectual Property I, L.P. Guided-wave transmission device and methods for use therewith
US9954286B2 (en) 2014-10-21 2018-04-24 At&T Intellectual Property I, L.P. Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith
US9876587B2 (en) 2014-10-21 2018-01-23 At&T Intellectual Property I, L.P. Transmission device with impairment compensation and methods for use therewith
US9948355B2 (en) 2014-10-21 2018-04-17 At&T Intellectual Property I, L.P. Apparatus for providing communication services and methods thereof
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
US9912033B2 (en) 2014-10-21 2018-03-06 At&T Intellectual Property I, Lp Guided wave coupler, coupling module and methods for use therewith
US9871558B2 (en) 2014-10-21 2018-01-16 At&T Intellectual Property I, L.P. Guided-wave transmission device and methods for use therewith
US9705610B2 (en) 2014-10-21 2017-07-11 At&T Intellectual Property I, L.P. Transmission device with impairment compensation and methods for use therewith
US9780834B2 (en) 2014-10-21 2017-10-03 At&T Intellectual Property I, L.P. Method and apparatus for transmitting electromagnetic waves
US9749083B2 (en) 2014-11-20 2017-08-29 At&T Intellectual Property I, L.P. Transmission device with mode division multiplexing and methods for use therewith
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
US9742521B2 (en) 2014-11-20 2017-08-22 At&T Intellectual Property I, L.P. Transmission device with mode division multiplexing and methods for use therewith
US10243784B2 (en) 2014-11-20 2019-03-26 At&T Intellectual Property I, L.P. System for generating topology information and methods thereof
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
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
US10009067B2 (en) 2014-12-04 2018-06-26 At&T Intellectual Property I, L.P. Method and apparatus for configuring a communication interface
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
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
US9876570B2 (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
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
US9793955B2 (en) 2015-04-24 2017-10-17 At&T Intellectual Property I, Lp Passive electrical coupling device and methods for use therewith
US10224981B2 (en) 2015-04-24 2019-03-05 At&T Intellectual Property I, Lp Passive electrical coupling device and methods for use therewith
US9831912B2 (en) 2015-04-24 2017-11-28 At&T Intellectual Property I, Lp Directional coupling device and methods for use therewith
US9705561B2 (en) 2015-04-24 2017-07-11 At&T Intellectual Property I, L.P. Directional coupling device and methods for use therewith
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
US9793954B2 (en) 2015-04-28 2017-10-17 At&T Intellectual Property I, L.P. Magnetic coupling device and methods for use therewith
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
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
US9887447B2 (en) 2015-05-14 2018-02-06 At&T Intellectual Property I, L.P. Transmission medium having multiple cores and methods for use therewith
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
US9866309B2 (en) 2015-06-03 2018-01-09 At&T Intellectual Property I, Lp Host node device and methods for use therewith
US9912381B2 (en) 2015-06-03 2018-03-06 At&T Intellectual Property I, Lp Network termination and methods for use therewith
US10103801B2 (en) 2015-06-03 2018-10-16 At&T Intellectual Property I, L.P. Host node device and methods for use therewith
US9967002B2 (en) 2015-06-03 2018-05-08 At&T Intellectual I, Lp Network termination and methods for use therewith
US10050697B2 (en) 2015-06-03 2018-08-14 At&T Intellectual Property I, L.P. Host node device and methods for use therewith
US9912382B2 (en) 2015-06-03 2018-03-06 At&T Intellectual Property I, Lp Network termination and methods for use therewith
US9935703B2 (en) 2015-06-03 2018-04-03 At&T Intellectual Property I, L.P. Host node device and methods for use therewith
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
US9913139B2 (en) 2015-06-09 2018-03-06 At&T Intellectual Property I, L.P. Signal fingerprinting for authentication of communicating devices
US10142086B2 (en) 2015-06-11 2018-11-27 At&T Intellectual Property I, L.P. Repeater and methods for use therewith
US10027398B2 (en) 2015-06-11 2018-07-17 At&T Intellectual Property I, Lp Repeater and methods for use therewith
US10142010B2 (en) 2015-06-11 2018-11-27 At&T Intellectual Property I, L.P. Repeater and methods for use therewith
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
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
US9882657B2 (en) 2015-06-25 2018-01-30 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a fundamental wave mode on a transmission medium
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
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
US9787412B2 (en) 2015-06-25 2017-10-10 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a fundamental wave mode on a transmission medium
US10069185B2 (en) 2015-06-25 2018-09-04 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium
US10170840B2 (en) 2015-07-14 2019-01-01 At&T Intellectual Property I, L.P. Apparatus and methods for sending or receiving electromagnetic signals
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
US9853342B2 (en) 2015-07-14 2017-12-26 At&T Intellectual Property I, L.P. Dielectric transmission medium connector 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
US9628116B2 (en) 2015-07-14 2017-04-18 At&T Intellectual Property I, L.P. Apparatus and methods for transmitting wireless signals
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
US10148016B2 (en) 2015-07-14 2018-12-04 At&T Intellectual Property I, L.P. Apparatus and methods for communicating utilizing an antenna array
US10044409B2 (en) 2015-07-14 2018-08-07 At&T Intellectual Property I, L.P. Transmission medium and methods for use therewith
US9929755B2 (en) 2015-07-14 2018-03-27 At&T Intellectual Property I, L.P. Method and apparatus for coupling an antenna to a device
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
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
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
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
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
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
US9749053B2 (en) 2015-07-23 2017-08-29 At&T Intellectual Property I, L.P. Node device, repeater and methods for use therewith
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
US9806818B2 (en) 2015-07-23 2017-10-31 At&T Intellectual Property I, Lp Node device, repeater 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
US10074886B2 (en) 2015-07-23 2018-09-11 At&T Intellectual Property I, L.P. Dielectric transmission medium comprising a plurality of rigid dielectric members coupled together in a ball and socket configuration
US9912027B2 (en) 2015-07-23 2018-03-06 At&T Intellectual Property I, L.P. Method and apparatus for exchanging communication signals
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
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
US9838078B2 (en) 2015-07-31 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for exchanging communication signals
US9904535B2 (en) 2015-09-14 2018-02-27 At&T Intellectual Property I, L.P. Method and apparatus for distributing software
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
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
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
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
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
US9876264B2 (en) 2015-10-02 2018-01-23 At&T Intellectual Property I, Lp Communication system, guided wave switch and methods for use therewith
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
US9860075B1 (en) 2016-08-26 2018-01-02 At&T Intellectual Property I, L.P. Method and communication node for broadband distribution
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
US10341142B2 (en) 2016-10-14 2019-07-02 At&T Intellectual Property I, L.P. Apparatus and methods for generating non-interfering electromagnetic waves on an uninsulated conductor
US10135146B2 (en) 2016-10-18 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via circuits
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
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
US9991580B2 (en) 2016-10-21 2018-06-05 At&T Intellectual Property I, L.P. Launcher and coupling system for guided wave mode cancellation
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
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
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
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
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
US10291334B2 (en) 2016-11-03 2019-05-14 At&T Intellectual Property I, L.P. System for detecting a fault in a communication system
US10340603B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Antenna system having shielded structural configurations for assembly
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
US10090594B2 (en) 2016-11-23 2018-10-02 At&T Intellectual Property I, L.P. Antenna system having structural configurations for assembly
US10340601B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Multi-antenna system and methods for use therewith
US10305190B2 (en) 2016-12-01 2019-05-28 At&T Intellectual Property I, L.P. Reflecting dielectric antenna system and methods for use therewith
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
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
US10020844B2 (en) 2016-12-06 2018-07-10 T&T Intellectual Property I, L.P. Method and apparatus for broadcast communication via guided waves
US9927517B1 (en) 2016-12-06 2018-03-27 At&T Intellectual Property I, L.P. Apparatus and methods for sensing rainfall
US10168695B2 (en) 2016-12-07 2019-01-01 At&T Intellectual Property I, L.P. Method and apparatus for controlling an unmanned aircraft
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
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
US9893795B1 (en) 2016-12-07 2018-02-13 At&T Intellectual Property I, Lp Method and repeater for broadband distribution
US10027397B2 (en) 2016-12-07 2018-07-17 At&T Intellectual Property I, L.P. Distributed antenna system and methods for use therewith
US9998870B1 (en) 2016-12-08 2018-06-12 At&T Intellectual Property I, L.P. Method and apparatus for proximity sensing
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
US10103422B2 (en) 2016-12-08 2018-10-16 At&T Intellectual Property I, L.P. Method and apparatus for mounting network devices
US10326689B2 (en) 2016-12-08 2019-06-18 At&T Intellectual Property I, L.P. Method and system for providing alternative communication paths
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
US10264586B2 (en) 2016-12-09 2019-04-16 At&T Mobility Ii Llc Cloud-based packet controller 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
US9838896B1 (en) 2016-12-09 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for assessing network coverage
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

Similar Documents

Publication Publication Date Title
CA2379151C (en) Ka/ku dual band feedhorn and orthomode transducer (omt)
US5793334A (en) Shrouded horn feed assembly
US2659817A (en) Translation of electromagnetic waves
US6014110A (en) Antenna and method for receiving or transmitting radiation through a dielectric material
US2671855A (en) Antenna
US2471021A (en) Radio wave guide
US5109232A (en) Dual frequency antenna feed with apertured channel
US2912695A (en) Corrugated wave guide devices
US3936838A (en) Multimode coupling system including a funnel-shaped multimode coupler
US3668567A (en) Dual mode rotary microwave coupler
CN1060863C (en) Module with antenna for transport device for transmitting and/or receiving millimetra wave
US7180459B2 (en) Multiple phase center feedhorn for reflector antenna
US2819451A (en) Electromagnetic-wave generating system
CA1261060A (en) Planar antenna with patch radiators
US3818490A (en) Dual frequency array
US3555553A (en) Coaxial-line to waveguide transition for horn antenna
US4626865A (en) Antenna element for orthogonally-polarized high frequency signals
US3732508A (en) Strip line to waveguide transition
JP4029217B2 (en) Waveguide horn array antenna and the radar system
US2908002A (en) Electromagnetic reflector
US3665481A (en) Multi-purpose antenna employing dish reflector with plural coaxial horn feeds
US3731236A (en) Independently adjustable dual polarized diplexer
US5173714A (en) Slot array antenna
US2542980A (en) Electromagnetic horn
CA1260609A (en) Wide bandwidth multiband feed system with polarization diversity