US2207845A - Propagation of waves in a wave guide - Google Patents

Propagation of waves in a wave guide Download PDF

Info

Publication number
US2207845A
US2207845A US210595A US21059538A US2207845A US 2207845 A US2207845 A US 2207845A US 210595 A US210595 A US 210595A US 21059538 A US21059538 A US 21059538A US 2207845 A US2207845 A US 2207845A
Authority
US
United States
Prior art keywords
guide
wave guide
waves
wave
transmission line
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
US210595A
Inventor
Wolff Irving
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Priority to US210595A priority Critical patent/US2207845A/en
Application granted granted Critical
Publication of US2207845A publication Critical patent/US2207845A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00Coupling devices of the waveguide type
    • H01P5/08Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/10Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced with unbalanced lines or devices
    • H01P5/103Hollow-waveguide/coaxial-line transitions

Description

July 16, 1940. 1. WOLFF I 2,207,845

PROPAGATION 0F WAVES IN A WAVE GUIDE Filed May 28, 1938 z/NE 7 sum 1 L a m; A L a 5 A n E IE W 1 .Li: i v ,5 1.5 6' 1\\ lnventor Irvin WoLff Gttorneg Patented July 16, 1940 PROPAGATION OF WAVES IN A WAVE GUIDE Irving Wolff, Merchantville, N. J., assignor to Radio Corporation of America, acorporation of Delaware Application May 28, 1938, Serial No. 210,595

. 5 Claims.

My invention relates to the transmission of ultra high frequency electromagnetic waves, and more particularly to a method and apparatus for coupling a source of ultra high frequency waves to a wave guide.

It is a primary object of this invention to provide an improved apparatus and a corresponding method for propagating waves into a wave guide. Another object of my invention is to provide for the-proper termination of a transmission line in a wave guide. A further object-is to provide a system which is capable of propagating ultra high frequency waves of a wide range of frequencies through a wave guide. A still further object of my invention is to provide a resistive termination for a transmission line which is capable of propagating ultra high frequency waves through a wave guide without reflections.

This invention will be better understood from the following description when considered inconnection with the accompanying drawing, and its scope is indicated by the appended claims.

throughout the drawing.

Referring to the drawing, Figure 1 is an elevational view, partly in section, of one embodiment of my invention in which a Similar reference numerals refer to similar parts concentric transmission line is shown terminating in a wave guide, v I

Figure 2 is aside elevation, partly in section, of a preferred'embodiment of my invention,

' Figure 3 is a sectional view of an alternative type of 'dielectricelement having a nonuniform dielectric constant'along its length, and

Figure 4 is a side elevation, partly in section, of an embodiment of my invention in which a two-wire transmission line is terminated in a wave guide.

It has been known for some time that ultra high frequency waves may be propagated through I dielectric medium, such as a pipe or other container, or may merely be a discontinuity between the medium and air.

The problem of terminating a transmission line in a wave guide is analogous in many ways to the termination of a transmission line at an antenna. It is well known that an antenna must be matched to the characteristic impedance of the line in order to get an efficient transfer of energy, and. to avoid undesirable reflections.

tor.

Matching may be accomplished by resonating the antenna, but this provides efficient operation only at the resonant frequency. At other frequencies reflections are 'set up due to the reactive character of the antenna. To prevent these reflec- 5 tions from occurring over a wide band of frequencies, the antenna must be substantially resistive over the desired range. This, for example, is a feature of the so-called rhombic or wave antenna.

Similar problems arise in the propagation of ultra-high frequency waves through wave guides when the energy is delivered from an oscillator through 'a' transmission line. If the diameter of the outer tube of a concentric line bears the proper relation to the wave length of the wave, it might appear that propagation would be achieved by merely cutting off the inner conductor. However, the abrupt change from one condition to another is equivalent to a mismatched antenna in the analogy mentioned above, and undesired reflections are therefore set up."

It is therefore proposed that coupling may be effected by a system such as that shown in the drawing. v

Referring to Fig. l, a concentric transmission line I is shown coming in from the left. This line consists of an outer member 3 and an inner concentric conductor 5. A coupling 1, such as a pipe joint, or any other suitable connector, is used to connect the transmission lineto a wave guide 9, which continues to the right.

In the cut-away portion of these tubes, the inner conductor 5 can be seen. It is to be noted that this conductor is not abruptly ended, but graduallytapered off to a point. The length of this tapered section is preferably equal to a number of wave lengths.

The solid lines indicate the lines of electric 40 force that exist in the system. Within the concentric tube the lines of force are substantially radial from the conductor 5, as'shown at ll, due to the conduction currents through the conduc- Within the guide the lines of force are arranged as shown at I3. It will be noted that the conduction currents in the center conductor become displacement currents in the guide. This distribution of the lines of force has been fully described in various articles, and need not be explained in detail here. For example, see the article by G. C. Southworth in The Journal of Applied Physics for October, 1937, page 660, or an article by the same author in the July 1937 Proceedings of the Institute of Radio Engineers, page 807.

It will be noted that along the region adjacent to the tapered section the lines of force gradually change from one arrangement to the other. This gradual change is due to the increasingly high resistance of the inner conductor, which causes a gradual increase in the ratio of displacement currents to conduction currents. This arrangement, however, does not give the greatest efficiency because of the inherently high resistance losses.

Fig. 2 illustrates a preferred embodiment of my invention which makes possible a still further and more gradual change from the comparatively low resistance of the inner conductor to the medium of the wave guide. At the same time, the resistance losses due to the currents through the high resistance of the conductor are reduced.

The conductor 5 is tapered to a point, as before, but in addition a piece of low loss dielectric material i5 is positioned around the tapered section, forming an extension thereof. The dielectric material is also tapered to a point. The dielectric constant of this material should be higher than that of the Wave guide medium. Thus the lines of force transfer gradually to the dielectric inner conductor, and then, asthis tapers ofi, they assume their normal shape in the guide. The use of this dielectric material at the termination of the metallic inner conductor increases the ratio of displacement currents to conduction currents fora specific resistance of the metallic conductor. The dielectric thus offers an alternative low loss path in the region of the tapered metallic conductor, and thus reduces the resistance losses. For a still more gradual transfer, a series of dielectric elements of difierent characteristics can be used in a similar manner, or an arrangement illustrated in Fig. 3.

Fig. 3 is a cross-sectionalview of the end of one of the inner conductors which may be utilized in the devices shown in the preceding figures. The inner conductor 5 is terminated in a point as before. The dielectric element 2|, however, difiers from that shown in connection with the earlier figures in that it has a nonuniform electrical characteristic along its length. The increased density of the stipplingat the inner end of this element indicates a region having some degree of conductivity or,. alternatively, a relatively high dielectric constant. The conductivity o'r dielectric constant of the element tapers off until at the end the dielectric constant of the material approaches that of the guide medium. This may be accomplished by embedding particles in the dielectric material, or by other suitable means.

The embodiment shown in Fig. 4 illustrates the application of my invention to a two-wire transmission line. Two conductors l1 and 19 are the terminating ends of a transmission line which connects to a source of ultra highfrequency signals, which is not shown. The conductors are symmetrically placed within the guide 9. Each conductor is tapered in accordance with this invention, and functions in a similar manner.

I have thus described a system by which a concentric or a parallel wire transmission line may be .efficiently coupled into a dielectric guide by gradually changing from one condition to another.

Although the performance has been explained in terms of a transfer from line to guide, the arrangements shown are equally capable of transferring waves from the guide to a line.

I claim as my invention:

1. In combination, a transmission line, a'wave guide, and means for electrically'coupling said line and said guide, said means including a dielectric of gradually decreasing conductivity extending into said guide.

2. In a device of the character'described, a concentric line, a wave guide, and means coupling said guide to said line, said means com.- prising a tapered extension of said inner .conductor of said line extending Within said guide a distance equal to at least a wave length and terminated in a tapered insulator.

3. In a device of the character described, a I

parallel wire transmission line, a wave guide,- and means coupling said guide to said line, said means comprising a tapered extension of each of said parallel wires extending within said guide a distance equal to at least a wave length,.-and terminated in a tapered dielectric element.

4. In combination, a transmission line anda Wave guide, means for gradually transferring cone. duction currents in said line to displacement currents in'said guide, and means for reducing the resistance losses in said first-named means.

5. In a system for coupling a concentric transmission line to a wave guide, means for propagating waves into said guide, said means comprising a tapered extension of the inner con-r ductor of said line, and means for reducingthe resistance losses in said tapered extension.

IRVING WOLFE.

US210595A 1938-05-28 1938-05-28 Propagation of waves in a wave guide Expired - Lifetime US2207845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US210595A US2207845A (en) 1938-05-28 1938-05-28 Propagation of waves in a wave guide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US210595A US2207845A (en) 1938-05-28 1938-05-28 Propagation of waves in a wave guide
GB1570439A GB529290A (en) 1938-05-28 1939-05-26 Improvements in or relating to ultra high frequency electro-magnetic wave transmission

Publications (1)

Publication Number Publication Date
US2207845A true US2207845A (en) 1940-07-16

Family

ID=22783513

Family Applications (1)

Application Number Title Priority Date Filing Date
US210595A Expired - Lifetime US2207845A (en) 1938-05-28 1938-05-28 Propagation of waves in a wave guide

Country Status (2)

Country Link
US (1) US2207845A (en)
GB (1) GB529290A (en)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429640A (en) * 1942-10-17 1947-10-28 Sperry Gyroscope Co Inc Directive antenna
US2430130A (en) * 1943-04-29 1947-11-04 Rca Corp Attenuator for wave guides
US2433368A (en) * 1942-03-31 1947-12-30 Sperry Gyroscope Co Inc Wave guide construction
US2463428A (en) * 1945-12-17 1949-03-01 Foster F Rieke Coaxial line termination
US2484822A (en) * 1944-04-24 1949-10-18 Sperry Corp Switching apparatus for ultra high frequencies
US2491662A (en) * 1945-03-30 1949-12-20 Bell Telephone Labor Inc Attenuator
US2497094A (en) * 1945-02-28 1950-02-14 Sperry Corp Microwave apparatus
US2513205A (en) * 1943-11-19 1950-06-27 Us Navy Rotatable joint for radio wave guide systems
US2515039A (en) * 1946-08-16 1950-07-11 Bell Telephone Labor Inc Transverse wave transmission in liquids
US2526678A (en) * 1943-04-02 1950-10-24 Sperry Corp Ultra high frequency coupling
US2534289A (en) * 1942-10-17 1950-12-19 Sperry Corp Wave guide impedance matching section
US2540036A (en) * 1948-03-26 1951-01-30 Raytheon Mfg Co Food cooking
US2540839A (en) * 1940-07-18 1951-02-06 Bell Telephone Labor Inc Wave guide system
US2546840A (en) * 1945-04-26 1951-03-27 Bell Telephone Labor Inc Wave guide phase shifter
US2567210A (en) * 1947-07-23 1951-09-11 Sperry Corp Ultra-high-frequency attenuator
US2600466A (en) * 1943-05-07 1952-06-17 Bell Telephone Labor Inc Wave guide attenuator
US2602857A (en) * 1944-08-24 1952-07-08 Bell Telephone Labor Inc Wave guide attenuator
US2603710A (en) * 1946-12-11 1952-07-15 Bell Telephone Labor Inc Rotatable attenuator for wave guides
US2633493A (en) * 1946-04-02 1953-03-31 Seymour B Cohn Broad-band wave guide-to-coaxial line junction
US2723378A (en) * 1950-03-27 1955-11-08 Int Standard Electric Corp Transmission line system
US2736866A (en) * 1950-03-27 1956-02-28 Int Standard Electric Corp Filter for transmission line
US2770783A (en) * 1950-05-23 1956-11-13 Int Standard Electric Corp Surface wave transmission line
US2799017A (en) * 1946-08-31 1957-07-09 Alford Andrew Slotted cylindrical antennas
US2804598A (en) * 1946-02-08 1957-08-27 Roberto M Fano Wave guide termination
US3145356A (en) * 1960-10-11 1964-08-18 Nat Res Dev Different sized waveguides coupled by a narrow tapered dielectric rod
US3218429A (en) * 1962-03-14 1965-11-16 Electrolux Ab Dielectric heating apparatus
FR2096860A1 (en) * 1970-07-07 1972-03-03 Radiotechnique Compelec
EP0060174A1 (en) * 1981-02-27 1982-09-15 Thomson-Csf Band-pass filter with dielectric resonators
EP0128970A1 (en) * 1983-06-18 1984-12-27 ANT Nachrichtentechnik GmbH Four-port network for a monopulse-tracking microwave antenna
EP0467818A1 (en) * 1990-07-20 1992-01-22 France Telecom Transition element between electromagnetic waveguides, especially between a circular waveguide and a coaxial waveguide
US20150008993A1 (en) * 2013-07-03 2015-01-08 City University Of Hong Kong Waveguide coupler

Families Citing this family (142)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9113347B2 (en) 2012-12-05 2015-08-18 At&T Intellectual Property I, Lp 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
US9999038B2 (en) 2013-05-31 2018-06-12 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9525524B2 (en) 2013-05-31 2016-12-20 At&T Intellectual Property I, L.P. Remote distributed antenna system
US8897697B1 (en) 2013-11-06 2014-11-25 At&T Intellectual Property I, Lp Millimeter-wave surface-wave communications
US9209902B2 (en) 2013-12-10 2015-12-08 At&T Intellectual Property I, L.P. Quasi-optical coupler
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
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
US10063280B2 (en) 2014-09-17 2018-08-28 At&T Intellectual Property I, L.P. Monitoring and mitigating conditions in a communication network
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
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
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
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
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
US9312919B1 (en) 2014-10-21 2016-04-12 At&T Intellectual Property I, Lp Transmission device with impairment compensation and methods for use therewith
US9520945B2 (en) 2014-10-21 2016-12-13 At&T Intellectual Property I, L.P. Apparatus for providing communication services and methods thereof
US9577306B2 (en) 2014-10-21 2017-02-21 At&T Intellectual Property I, L.P. Guided-wave transmission device and methods for use therewith
US9627768B2 (en) 2014-10-21 2017-04-18 At&T Intellectual Property I, L.P. Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith
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
US9780834B2 (en) 2014-10-21 2017-10-03 At&T Intellectual Property I, L.P. Method and apparatus for transmitting electromagnetic waves
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
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
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
US10243784B2 (en) 2014-11-20 2019-03-26 At&T Intellectual Property I, L.P. System for generating topology information and methods thereof
US9544006B2 (en) 2014-11-20 2017-01-10 At&T Intellectual Property I, L.P. Transmission device with mode division multiplexing and methods for use therewith
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
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
US9654173B2 (en) 2014-11-20 2017-05-16 At&T Intellectual Property I, L.P. Apparatus for powering 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
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
US9705561B2 (en) 2015-04-24 2017-07-11 At&T Intellectual Property I, L.P. Directional 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
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
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
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
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
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
US9866309B2 (en) 2015-06-03 2018-01-09 At&T Intellectual Property I, Lp Host node device and methods for use therewith
US20160359541A1 (en) 2015-06-03 2016-12-08 At&T Intellectual Property I, Lp Client 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
US10154493B2 (en) 2015-06-03 2018-12-11 At&T Intellectual Property I, L.P. 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
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
US9608692B2 (en) 2015-06-11 2017-03-28 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
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
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
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
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
US10148016B2 (en) 2015-07-14 2018-12-04 At&T Intellectual Property I, L.P. Apparatus and methods for communicating utilizing an antenna array
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
US9853342B2 (en) 2015-07-14 2017-12-26 At&T Intellectual Property I, L.P. Dielectric transmission medium connector 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
US9628116B2 (en) 2015-07-14 2017-04-18 At&T Intellectual Property I, L.P. Apparatus and methods for transmitting wireless 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
US10044409B2 (en) 2015-07-14 2018-08-07 At&T Intellectual Property I, L.P. Transmission medium and methods for use therewith
US9836957B2 (en) 2015-07-14 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for communicating with premises equipment
US10170840B2 (en) 2015-07-14 2019-01-01 At&T Intellectual Property I, L.P. Apparatus and methods for sending or receiving electromagnetic 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
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
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
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
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
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
US9749053B2 (en) 2015-07-23 2017-08-29 At&T Intellectual Property I, L.P. Node device, repeater and methods for use therewith
US9912027B2 (en) 2015-07-23 2018-03-06 At&T Intellectual Property I, L.P. Method and apparatus for exchanging communication signals
US9948333B2 (en) 2015-07-23 2018-04-17 At&T Intellectual Property I, L.P. Method and apparatus for wireless communications to mitigate interference
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
US9461706B1 (en) 2015-07-31 2016-10-04 At&T Intellectual Property I, Lp Method and apparatus for exchanging communication signals
US10020587B2 (en) 2015-07-31 2018-07-10 At&T Intellectual Property I, L.P. Radial antenna 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
US9904535B2 (en) 2015-09-14 2018-02-27 At&T Intellectual Property I, L.P. Method and apparatus for distributing software
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
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
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
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
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
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
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
US9882277B2 (en) 2015-10-02 2018-01-30 At&T Intellectual Property I, Lp Communication device and antenna assembly with actuated gimbal mount
US10074890B2 (en) 2015-10-02 2018-09-11 At&T Intellectual Property I, L.P. Communication device and antenna with integrated light assembly
US10355367B2 (en) 2015-10-16 2019-07-16 At&T Intellectual Property I, L.P. Antenna structure for exchanging wireless signals
US10051483B2 (en) 2015-10-16 2018-08-14 At&T Intellectual Property I, L.P. Method and apparatus for directing wireless 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
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
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
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
US10374316B2 (en) 2016-10-21 2019-08-06 At&T Intellectual Property I, L.P. System and dielectric antenna with non-uniform dielectric
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
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
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
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
US10291334B2 (en) 2016-11-03 2019-05-14 At&T Intellectual Property I, L.P. System for detecting a fault in a communication system
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
US10090594B2 (en) 2016-11-23 2018-10-02 At&T Intellectual Property I, L.P. Antenna system having 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
US10340601B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Multi-antenna system and methods for use therewith
US10340603B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Antenna system having shielded structural configurations for assembly
US10305190B2 (en) 2016-12-01 2019-05-28 At&T Intellectual Property I, L.P. Reflecting dielectric antenna system and methods for use therewith
US10361489B2 (en) 2016-12-01 2019-07-23 At&T Intellectual Property I, L.P. Dielectric dish antenna system and methods for use therewith
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
US9927517B1 (en) 2016-12-06 2018-03-27 At&T Intellectual Property I, L.P. Apparatus and methods for sensing rainfall
US10020844B2 (en) 2016-12-06 2018-07-10 T&T Intellectual Property I, L.P. Method and apparatus for broadcast communication via guided waves
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
US10439675B2 (en) 2016-12-06 2019-10-08 At&T Intellectual Property I, L.P. Method and apparatus for repeating guided wave communication signals
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
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
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
US10168695B2 (en) 2016-12-07 2019-01-01 At&T Intellectual Property I, L.P. Method and apparatus for controlling an unmanned aircraft
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
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
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
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
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
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
US10103422B2 (en) 2016-12-08 2018-10-16 At&T Intellectual Property I, L.P. Method and apparatus for mounting network devices
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
US9998870B1 (en) 2016-12-08 2018-06-12 At&T Intellectual Property I, L.P. Method and apparatus for proximity sensing
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
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
US10264586B2 (en) 2016-12-09 2019-04-16 At&T Mobility Ii Llc Cloud-based packet controller and methods for use therewith
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

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540839A (en) * 1940-07-18 1951-02-06 Bell Telephone Labor Inc Wave guide system
US2433368A (en) * 1942-03-31 1947-12-30 Sperry Gyroscope Co Inc Wave guide construction
US2429640A (en) * 1942-10-17 1947-10-28 Sperry Gyroscope Co Inc Directive antenna
US2534289A (en) * 1942-10-17 1950-12-19 Sperry Corp Wave guide impedance matching section
US2526678A (en) * 1943-04-02 1950-10-24 Sperry Corp Ultra high frequency coupling
US2430130A (en) * 1943-04-29 1947-11-04 Rca Corp Attenuator for wave guides
US2600466A (en) * 1943-05-07 1952-06-17 Bell Telephone Labor Inc Wave guide attenuator
US2513205A (en) * 1943-11-19 1950-06-27 Us Navy Rotatable joint for radio wave guide systems
US2484822A (en) * 1944-04-24 1949-10-18 Sperry Corp Switching apparatus for ultra high frequencies
US2602857A (en) * 1944-08-24 1952-07-08 Bell Telephone Labor Inc Wave guide attenuator
US2497094A (en) * 1945-02-28 1950-02-14 Sperry Corp Microwave apparatus
US2491662A (en) * 1945-03-30 1949-12-20 Bell Telephone Labor Inc Attenuator
US2546840A (en) * 1945-04-26 1951-03-27 Bell Telephone Labor Inc Wave guide phase shifter
US2463428A (en) * 1945-12-17 1949-03-01 Foster F Rieke Coaxial line termination
US2804598A (en) * 1946-02-08 1957-08-27 Roberto M Fano Wave guide termination
US2633493A (en) * 1946-04-02 1953-03-31 Seymour B Cohn Broad-band wave guide-to-coaxial line junction
US2515039A (en) * 1946-08-16 1950-07-11 Bell Telephone Labor Inc Transverse wave transmission in liquids
US2799017A (en) * 1946-08-31 1957-07-09 Alford Andrew Slotted cylindrical antennas
US2603710A (en) * 1946-12-11 1952-07-15 Bell Telephone Labor Inc Rotatable attenuator for wave guides
US2567210A (en) * 1947-07-23 1951-09-11 Sperry Corp Ultra-high-frequency attenuator
US2540036A (en) * 1948-03-26 1951-01-30 Raytheon Mfg Co Food cooking
US2723378A (en) * 1950-03-27 1955-11-08 Int Standard Electric Corp Transmission line system
US2736866A (en) * 1950-03-27 1956-02-28 Int Standard Electric Corp Filter for transmission line
US2770783A (en) * 1950-05-23 1956-11-13 Int Standard Electric Corp Surface wave transmission line
US3145356A (en) * 1960-10-11 1964-08-18 Nat Res Dev Different sized waveguides coupled by a narrow tapered dielectric rod
US3218429A (en) * 1962-03-14 1965-11-16 Electrolux Ab Dielectric heating apparatus
FR2096860A1 (en) * 1970-07-07 1972-03-03 Radiotechnique Compelec
EP0060174A1 (en) * 1981-02-27 1982-09-15 Thomson-Csf Band-pass filter with dielectric resonators
FR2509537A1 (en) * 1981-02-27 1983-01-14 Thomson Csf Dielectric resonator passer filter
EP0128970A1 (en) * 1983-06-18 1984-12-27 ANT Nachrichtentechnik GmbH Four-port network for a monopulse-tracking microwave antenna
US4630059A (en) * 1983-06-18 1986-12-16 Ant Nachrichtentechnik Gmbh Four-port network coupling arrangement for microwave antennas employing monopulse tracking
EP0467818A1 (en) * 1990-07-20 1992-01-22 France Telecom Transition element between electromagnetic waveguides, especially between a circular waveguide and a coaxial waveguide
FR2665025A1 (en) * 1990-07-20 1992-01-24 Sabatier Christian Element of transition between guides electromagnetic waves, in particular between a circular waveguide and a coaxial waveguide.
US5227744A (en) * 1990-07-20 1993-07-13 France Telecom Transition element between electromagnetic waveguides, notably between a circular waveguide and a coaxial waveguide
US20150008993A1 (en) * 2013-07-03 2015-01-08 City University Of Hong Kong Waveguide coupler
US9568675B2 (en) * 2013-07-03 2017-02-14 City University Of Hong Kong Waveguide coupler

Also Published As

Publication number Publication date
GB529290A (en) 1940-11-18

Similar Documents

Publication Publication Date Title
US3686624A (en) Coax line to strip line end launcher
Goubau Open wire lines
Denlinger Losses of microstrip lines
US2867776A (en) Surface waveguide transition section
US2578434A (en) High-frequency electron discharge device of the traveling wave type
US4149170A (en) Multiport cable choke
US2769147A (en) Wave propagation in composite conductors
US3654573A (en) Microwave transmission line termination
De Ronde A new class of microstrip directional couplers
US2106771A (en) Ultrahigh frequency signaling
US2556094A (en) High-frequency apparatus
US2542980A (en) Electromagnetic horn
US3219752A (en) High frequency electrical lead-in cable
US2503549A (en) Impedance matching in wave guides
US2915716A (en) Microstrip filters
US2877427A (en) Parallel transmission line circuit
US2516944A (en) Impedance-matching device
US4278955A (en) Coupler for feeding extensible transmission line
US2737632A (en) Supports for transmission line
US3458862A (en) Quadruply ridged waveguide and horn antenna
US2812501A (en) Transmission line
US2926317A (en) Transmission line
US5231412A (en) Sleeved monopole antenna
US2723378A (en) Transmission line system
US2760169A (en) Microwave filters