US3703690A - Dielectric waveguides - Google Patents

Dielectric waveguides Download PDF

Info

Publication number
US3703690A
US3703690A US3703690DA US3703690A US 3703690 A US3703690 A US 3703690A US 3703690D A US3703690D A US 3703690DA US 3703690 A US3703690 A US 3703690A
Authority
US
United States
Prior art keywords
core
lambda
electromagnetic energy
support body
waveguide
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
Inventor
Ivor Albert Ravenscroft
Lynden Ashrooke Jackson
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.)
Post Office
Original Assignee
Post Office
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
Priority to GB6158969A priority Critical patent/GB1338384A/en
Application filed by Post Office filed Critical Post Office
Application granted granted Critical
Publication of US3703690A publication Critical patent/US3703690A/en
Assigned to BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY reassignment BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY THE BRITISH TELECOMMUNICATIONS ACT 1984. (1984 CHAPTER 12) Assignors: BRITISH TELECOMMUNICATIONS
Assigned to BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY reassignment BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY THE BRITISH TELECOMMUNICATION ACT 1984. (APPOINTED DAY (NO.2) ORDER 1984. Assignors: BRITISH TELECOMMUNICATIONS
Assigned to BRITISH TELECOMMUNICATIONS reassignment BRITISH TELECOMMUNICATIONS THE BRITISH TELECOMMUNICATIONS ACT 1981 (APPOINTED DAY) ORDER 1981 (SEE RECORD FOR DETAILS) Assignors: POST OFFICE
Assigned to BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY reassignment BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY THE TELECOMMUNICATIONS ACT 1984 (NOMINATED COMPANY) ORDER 1984 Assignors: BRITISH TELECOMMUNICATIONS
Assigned to BRITISH TELECOMMUNICATIONS reassignment BRITISH TELECOMMUNICATIONS THE BRITISH TELECOMMUNICATIONS ACT 1981 (APPOINTED DAY) ORDER 1981 (SEE RECORD FOR DETAILS) Assignors: POST OFFICE
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
    • H01P3/00Waveguides; Transmission lines of the waveguide type
    • H01P3/16Dielectric waveguides, i.e. without a longitudinal conductor

Abstract

A dielectric waveguide for millimetric wavelengths comprising a core of polymer material supported by a body of foamed polymeric material and enclosed in a protective jacket.

Description

KR '3a703s690 United States Patent Ravenscroft et al.

rag/a1 5] Nov. 21, 1972 DIELECTRIC WAVEGUIDES Inventors: lvor Albert Ravenscrolt, Woodbridge; Lynden Ashrooke Jackson, Ipswich, both of England Assignee: The Post Office, London, England Filed: Dec. 15, 1970 Appl. No.: 98,242

Foreign Application Priority Data Dec. 17, 1969 Great Britain ..6l,589/69 US. Cl. ..333/95 5, 333/98 M, 350/96 Int. Cl. ..H0lp 3/16, HOlp 3/18 Field of Search ..333/95, 95 S, 98, 98 M References Cited UNITED STATES PATENTS 11/1964 Hicks, Jr. et al ..333/95 X 3,040,278 6/1962 Griemsmann ..333/95 2,769,148 10/1956 Clogston ..333/95 X 2,794,959 6/1957 Fox ..333/95 X 3,386,787 6/1968 Kaplan ..333/95 X 3,434,774 3/1969 Miller ..333/95 X 3,542,536 11/1970 Primary Examiner-l-lerman Karl Saalbach Assistant Examiner-Marvin Nussbaum Attorney-Hall & Houghton ABSTRACT A dielectric waveguide for millimetric wavelengths comprising a core of polymer material supported by a body of foamed polymeric material and enclosed in a protective jacket.

4 Claims, 7 Drawing Figures OR IN; 333795 1 p Flam et al. ..333/95 X P'A'TENTEDnuvz: m2

sum 1 nr 6 FIG. 2.

.74 01? 4 1% vsmrno F77 'INVENTOR? BY 7am 7% ATTORNEY imam/21 I972 WENT SHEET 2 [IF 6 9 B S 3253mm mwwzqzmoz k 3 2 E 3 g g g Q 3 I 29%: 38m 5 we? ma 3m Us EBQQ v -mwm -wR 85m HE E m: as mzfim is 335- 3 4 INVENTORS 'BY ATTORNEY P'A'TE'N'TEDnum I972 SHEET 5 UF 6 FREQUENCY (GHZ) FIG. 6.

I 1 01? A PA VE/I/SCROFT INVENTOR ATTORNEY P'A'TE'NTEDInm I972 SHEET 6 0F 6 Ecimg z kqbzmtq INVENTORS DIELECTRIC WAVEGUIDES BACKGROUND OF THE INVENTION It has been proposed to employ a rod of dielectric material as a waveguide but in the past low loss transmission has been achieved only with rods of diameter small in relation to wavelength. Dielectric rods of such small diameter do not possess adequate guiding properties and therefore have to be employed in straight lengths which limits their usefulness.

It is an object of the present invention to provide an improved dielectric rod waveguide.

SUMMARY OF THE INVENTION According to the present invention a dielectric rod waveguide comprises a core of a polymeric material of a loss angle about 50 microradians or less and of a diameter from about 0.5 A a to about 0.85 A where A, is the free space wavelength of the electromagnetic energy to be transmitted along the waveguide, the core being supported by a body of polymeric material in foamed form, having an effective dielectric constant substantially equal to unity and of a size such that the overall diameter of the core and support body is of a value from about 1.6 A, to about 5.0 A,,, the whole lying within a jacket providing protection against mechanical stresses, the ingress of moisture and providing electrical screening.

The core may be composed of polypropylene, a particularly suitable form of which is that known as PXC 3391 manufactured by Imperial Chemical Industries Limited.

The polymeric material in foamed form supporting the core may be the same material as that of which the core is composed.

Preferably, the loss angle should be below microradians.

The core may be in the form of a solid rod or it may consist of a number of strands of the dielectric material or it may be a rod of foamed dielectric material. Both these alternative forms have a lower density than the solid rod and both have a lower effective dielectric constant and lower effective loss angle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged cross-section of the waveguide,

FIG. 2 shows on a difierent scale from FIG. 1 and in diagrammatic form the field configuration of the HE mode in the waveguide of FIG. 1, and,

FIGS. 3, 4, 5, 6 and 7 are graphs illustrating various relationships.

DESCRIPTION OF PREFERRED EMBODIMENTS The waveguide shown in FIG. 1 consists of a core 1 comprising a solid rod of polypropylene of electrical grade having a dielectric constant e, 2.26 of a loss angles equal to 50 microradians. The diameter of the core 1 is 5.3 mm and it is covered by a sheath 2 of low-loss foamed polypropylene preferably of the same grade as that from which the core is made. The overall diameter of the core 1 and sheath 2 is 28 mm. The outer surface of the sheath is covered with a layer 3 of a loss'y" foam having the same effective dielectric constant as the low loss foam. The final covering of the waveguide is a protective jacket 4 of a suitable polymer. The jacket 4 pro- 7 vides protection against mechanical stresses and electrical screening. Embedded in or otherwise forming part of the jacket is a water barrier providing adequate protection against ingress of moisture.

The waveguide supports the HE mode and operates over the frequency range 29-39 Gl-Iz. The field configuration of the HE. mode is indicated in FIG. 2.

The core 1 may be formed by extrusion, care being taken to the diameter of the core 1 to within very close tolerances about i 1 percent and to ensure that the core is totally homogeneous and of a high quality surface finish. The core 1 may be extruded by a method in which molten material is extruded through a nozzle along whose length the rate of cooling of material passing through it is varied in such manner as to perrnit the application to the molten material of an extra or back-up pressure which substantially prevents the appearance of voids. The nozzle has a bore which has an extremely smooth surface thereby ensuring the requisite high quality surface finish for the core.

The sheath 2 may be made by conventional foaming techniques and may be applied to the core during extrusion of the latter or after. The core 1 may be passed into a chamber inside which the core is held at a temperature below the softening of the material from which the core is made, sheathing material being fed to the chamber and therein bonded to the core. The sheathing material may be allowed to foam or be foamed after entry into the chamber or the sheathing material may be fed in foamed form into the chamber.

Application of the lossy material comprising the layer 3 may be effected by the introduction of a substance having a high loss angle, for example carbon, into the outer regions of the foamed sheath 2, or alternatively, the lossy material may be introduced as part of a separately extruded layer.

The group velocity of the HE mode depends to a large extent on the diameter in wavelengths of the core 1, and varies between limits obtained by propagation in free space, when the core diameter tends to zero, and by propagation entirely through the material of the core. FIG. 3 shows, for material of dielectric constant e, 2.26, the relationship between group velocity and normalized frequency (core diameter D/free space wavelength) obtained by numerical methods. If dispersion is to be kept at acceptably low values, rod diameters below about 0.3 A, and from about 0.5 A and above must be used, say from about 0.5 A, to 0.85 A the upper limit being reasonably close to the cut-off point for higher modes of operation of the waveguide.

The relationship between group velocity and frequency for the core 1 of the waveguide of FIG. 1 is shown in FIG. 4.

Since the core 1 must be supported in some suitable manner, practical values for the extent of the radial field of the I-IE, mode must be ascertained. To indicate the extent of the radial field, the graph of FIG. 5 has been prepared showing the diameter of D1 1A,, of the concentric cylinder through which 99 percent and 99.99 percent of the total power in the propagated wave flows. This indicates that the variation of the diameter of percentage power flow with frequency is fairly uniform over the range D X 0.5 A, and 0.72 A

FIG. 5 also shows that 99 percent of the total power is transmitted through a cylinder of a diameter D1 of about 1.6 A over the range of D just mentioned whilst 99.9 percent of the total power is transmitted through a cylinder of a diameter D1 of about 1.4 A However, if the latter value is increased to about 5.0 A a downward extension of transmitted bandwidth is possible.

FIG. 6 shows the relationship between extent of radial field and frequency of operation for the core 1 of the waveguide of FIG. 1. FIG. 6 shows that the overall diameter of the cylinder containing 99.99 percent of the energy is within 28 mm over the frequency range 29-39 GHz.

The attenuation of the HE mode is given approximately by the equation a g 1 nepers/metre where A, free space wavelength in meters 6 dielectric constant of core 1 to sheath 2 -y loss angle of core 1 in radians N /N millimetric of power inside rod to the total power transmitted.

FIG. 7 shows the variation of the attenuation of the waveguide of FIG. 1 with frequency over the range 29-39 GHz.

Thus, by minimizing losses in the material, attenuation, for a given set of operating parameters, is reduced. The dielectric loss may also be reduced by adopting a core of foamed or standard form.

We claim:

1. A dielectric rod waveguide for the transmission of electromagnetic energy at frequencies in the millimetric waveband, the waveguide comprising in combination a core through which a proportion but not all of said electromagnetic energy is transmitted, said core having a diameter lying within the range from about 0.5 A to about 0.85 A where A is the free space wavelength of the electromagnetic energy to be transmitted and being of a polymeric material with a loss angle not greater than about 50 microradians, a core support body round the core through which substantially the balance of said electromagnetic energy is transmitted, the support body comprising a tubular body of polymeric material in foamed form and having a dielectric constant of substantially equal'to unity and of a size such that the overall diameter of core and support body lies within the range from about 1.6 A, to about 5.0 A lossy material associated with said support body to absorb electromagnetic energy incident upon it, and, surrounding the core support, a jacket providing protection against mechanical stresses, the ingress of moisture and electrical screening.

2. A dielectric rod waveguide as claimed in claim 1 in which the core is of stranded form.

3. A dielectric rod waveguide as claimed in claim 1 in which the core is of foamed form.

4. A dielectric rod waveguide as claimed in claim 1 in which the polymeric material of which the core is formed is the same as that of which the core support is formed.

Claims (4)

1. A dielectric rod waveguide for the transmission of electromagnetic energy at frequencies in the millimetric waveband, the waveguide comprising in combination a core through which a proportion but not all of said electromagnetic energy is transmitted, said core having a diameter lying within the range from about 0.5 lambda o to about 0.85 lambda o where lambda o is the free space wavelength of the electromagnetic energy to be transmitted and being of a polymeric material with a loss angle not greater than about 50 microradians, a core support body round the core through which substantially the balance of said electromagnetic energy is transmitted, the support body comprising a tubular body of polymeric material in foamed form and having a dielectric constant of substantially equal to unity and of a size such that the overall diameter of core and support body lies within the range from about 1.6 lambda o to about 5.0 lambda o, lossy material associated with said support body to absorb electromagnetic energy incident upon it, and, surrounding the core support, a jacket providing protection against mechanical stresses, the ingress of moisture and electrical screening.
1. A dielectric rod waveguide for the transmission of electromagnetic energy at frequencies in the millimetric waveband, the waveguide comprising in combination a core through which a proportion but not all of said electromagnetic energy is transmitted, said core having a diameter lying within the range from about 0.5 lambda o to about 0.85 lambda o where lambda o is the free space wavelength of the electromagnetic energy to be transmitted and being of a polymeric material with a loss angle not greater than about 50 microradians, a core support body round the core through which substantially the balance of said electromagnetic energy is transmitted, the support body comprising a tubular body of polymeric material in foamed form and having a dielectric constant of substantially equal to unity and of a size such that the overall diameter of core and support body lies within the range from about 1.6 lambda o to about 5.0 lambda o, lossy material associated with said support body to absorb electromagnetic energy incident upon it, and, surrounding the core support, a jacket providing protection against mechanical stresses, the ingress of moisture and electrical screening.
2. A dielectric rod waveguide as claimed in claim 1 in which the core is of stranded form.
3. A dielectric rod waveguide as claimed in claim 1 in which the core is of foamed form.
US3703690D 1969-12-17 1970-12-15 Dielectric waveguides Expired - Lifetime US3703690A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB6158969A GB1338384A (en) 1969-12-17 1969-12-17 Dielectric waveguides

Publications (1)

Publication Number Publication Date
US3703690A true US3703690A (en) 1972-11-21

Family

ID=10487197

Family Applications (1)

Application Number Title Priority Date Filing Date
US3703690D Expired - Lifetime US3703690A (en) 1969-12-17 1970-12-15 Dielectric waveguides

Country Status (5)

Country Link
US (1) US3703690A (en)
DE (1) DE2061052C3 (en)
FR (1) FR2070897B1 (en)
GB (1) GB1338384A (en)
NL (1) NL7018357A (en)

Cited By (130)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965448A (en) * 1975-05-07 1976-06-22 The United States Of America As Represented By The Secretary Of The Navy Waveguide isolator with damping means
US3980390A (en) * 1974-03-20 1976-09-14 Sumitomo Electric Industries, Ltd. Optical transmission fiber
US4000936A (en) * 1974-07-30 1977-01-04 Bell Telephone Laboratories, Incorporated Optical fiber jacket designs for minimum distortion loss
US4167305A (en) * 1974-06-17 1979-09-11 Sumitomo Electric Industries Ltd. Optical transmission fiber
US4216449A (en) * 1977-02-11 1980-08-05 Bbc Brown Boveri & Company Limited Waveguide for the transmission of electromagnetic energy
US4318064A (en) * 1977-05-20 1982-03-02 Patelhold Patentverwertungs- & Elektro-Holding Ag Resonator for high frequency electromagnetic oscillations
US4556855A (en) * 1983-10-31 1985-12-03 The United States Of America As Represented By The Secretary Of The Navy RF Components and networks in shaped dielectrics
US4792774A (en) * 1987-09-29 1988-12-20 W. L. Gore & Associates, Inc. Dielectric waveguide having higher order mode suppression filters
EP0304141A2 (en) * 1987-08-17 1989-02-22 W.L. GORE & ASSOCIATES, INC. A dielectric waveguide
US4825221A (en) * 1985-01-16 1989-04-25 Junkosha Co., Ltd. Directly emitting dielectric transmission line
EP0335570A1 (en) * 1988-04-01 1989-10-04 Junkosha Co. Ltd. Transmission Line
JP2016178402A (en) * 2015-03-19 2016-10-06 株式会社Nttドコモ Wireless antenna, wireless communication system
US9472840B2 (en) * 2013-06-12 2016-10-18 Texas Instruments Incorporated Dielectric waveguide comprised of a core, a cladding surrounding the core and cylindrical shape conductive rings surrounding the cladding
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
US9608740B2 (en) 2015-07-15 2017-03-28 At&T Intellectual Property I, L.P. Method and apparatus for launching a wave mode that mitigates interference
US9608692B2 (en) 2015-06-11 2017-03-28 At&T Intellectual Property I, L.P. Repeater and methods for use therewith
US9615269B2 (en) 2014-10-02 2017-04-04 At&T Intellectual Property I, L.P. Method and apparatus that provides fault tolerance in a communication network
US9628116B2 (en) 2015-07-14 2017-04-18 At&T Intellectual Property I, L.P. Apparatus and methods for transmitting wireless signals
US9640850B2 (en) 2015-06-25 2017-05-02 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium
US9654173B2 (en) 2014-11-20 2017-05-16 At&T Intellectual Property I, L.P. Apparatus for powering a communication device and methods thereof
US9661505B2 (en) 2013-11-06 2017-05-23 At&T Intellectual Property I, L.P. Surface-wave communications and methods thereof
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
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
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
US9705561B2 (en) 2015-04-24 2017-07-11 At&T Intellectual Property I, L.P. Directional coupling device and methods for use therewith
US9712350B2 (en) 2014-11-20 2017-07-18 At&T Intellectual Property I, L.P. Transmission device with channel equalization and control 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
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
US9749053B2 (en) 2015-07-23 2017-08-29 At&T Intellectual Property I, L.P. Node device, repeater 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
US9762289B2 (en) 2014-10-14 2017-09-12 At&T Intellectual Property I, L.P. Method and apparatus for transmitting or receiving signals in a transportation system
US9769128B2 (en) 2015-09-28 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for encryption of communications over a network
US9769020B2 (en) 2014-10-21 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for responding to events affecting communications in a communication network
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
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
US9794003B2 (en) 2013-12-10 2017-10-17 At&T Intellectual Property I, L.P. Quasi-optical coupler
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
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
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
WO2017191409A1 (en) * 2016-05-03 2017-11-09 Universite de Bordeaux Plastic waveguide for the propagation of waves in the frequency range comprised between 1 ghz and 10 thz
US9820146B2 (en) 2015-06-12 2017-11-14 At&T Intellectual Property I, L.P. Method and apparatus for authentication and identity management of communicating devices
US9838896B1 (en) 2016-12-09 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for assessing network coverage
US9838078B2 (en) 2015-07-31 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for exchanging communication 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
US9847850B2 (en) 2014-10-14 2017-12-19 At&T Intellectual Property I, L.P. Method and apparatus for adjusting a mode of communication in a communication network
US9853342B2 (en) 2015-07-14 2017-12-26 At&T Intellectual Property I, L.P. Dielectric transmission medium connector and methods for use therewith
US9860075B1 (en) 2016-08-26 2018-01-02 At&T Intellectual Property I, L.P. Method and communication node for broadband distribution
US9866309B2 (en) 2015-06-03 2018-01-09 At&T Intellectual Property I, Lp Host node device and methods for use therewith
US9865911B2 (en) 2015-06-25 2018-01-09 At&T Intellectual Property I, L.P. Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium
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
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
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
US9876264B2 (en) 2015-10-02 2018-01-23 At&T Intellectual Property I, Lp Communication system, guided wave switch and methods for use therewith
US9876571B2 (en) 2015-02-20 2018-01-23 At&T Intellectual Property I, Lp Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith
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
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
US9882277B2 (en) 2015-10-02 2018-01-30 At&T Intellectual Property I, Lp Communication device and antenna assembly with actuated gimbal mount
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
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
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
US9913139B2 (en) 2015-06-09 2018-03-06 At&T Intellectual Property I, L.P. Signal fingerprinting for authentication of communicating devices
US9917341B2 (en) 2015-05-27 2018-03-13 At&T Intellectual Property I, L.P. Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves
US9930668B2 (en) 2013-05-31 2018-03-27 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9927517B1 (en) 2016-12-06 2018-03-27 At&T Intellectual Property I, L.P. Apparatus and methods for sensing rainfall
US9948355B2 (en) 2014-10-21 2018-04-17 At&T Intellectual Property I, L.P. Apparatus for providing communication services and methods thereof
US9948333B2 (en) 2015-07-23 2018-04-17 At&T Intellectual Property I, L.P. Method and apparatus for wireless communications to mitigate interference
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
US9998870B1 (en) 2016-12-08 2018-06-12 At&T Intellectual Property I, L.P. Method and apparatus for proximity sensing
US9997819B2 (en) 2015-06-09 2018-06-12 At&T Intellectual Property I, L.P. Transmission medium and method for facilitating propagation of electromagnetic waves via a core
US9999038B2 (en) 2013-05-31 2018-06-12 At&T Intellectual Property I, L.P. Remote distributed antenna system
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
US10033108B2 (en) 2015-07-14 2018-07-24 At&T Intellectual Property I, L.P. Apparatus and methods for generating an electromagnetic wave having a wave mode that mitigates interference
US10033107B2 (en) 2015-07-14 2018-07-24 At&T Intellectual Property I, L.P. Method and apparatus for coupling an antenna to a device
US10044409B2 (en) 2015-07-14 2018-08-07 At&T Intellectual Property I, L.P. Transmission medium and methods for use therewith
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
US10090606B2 (en) 2015-07-15 2018-10-02 At&T Intellectual Property I, L.P. Antenna system with dielectric array and methods for use therewith
US10090594B2 (en) 2016-11-23 2018-10-02 At&T Intellectual Property I, L.P. Antenna system having structural configurations for assembly
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
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
US10135147B2 (en) 2016-10-18 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via an antenna
US10135145B2 (en) 2016-12-06 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for generating an electromagnetic wave along a transmission medium
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
US10144036B2 (en) 2015-01-30 2018-12-04 At&T Intellectual Property I, L.P. Method and apparatus for mitigating interference affecting a propagation of electromagnetic waves guided by a transmission medium
US10148016B2 (en) 2015-07-14 2018-12-04 At&T Intellectual Property I, L.P. Apparatus and methods for communicating utilizing an antenna array
US10170840B2 (en) 2015-07-14 2019-01-01 At&T Intellectual Property I, L.P. Apparatus and methods for sending or receiving electromagnetic signals
US10168695B2 (en) 2016-12-07 2019-01-01 At&T Intellectual Property I, L.P. Method and apparatus for controlling an unmanned aircraft
US10178445B2 (en) 2016-11-23 2019-01-08 At&T Intellectual Property I, L.P. Methods, devices, and systems for load balancing between a plurality of waveguides
US10205655B2 (en) 2015-07-14 2019-02-12 At&T Intellectual Property I, L.P. Apparatus and methods for communicating utilizing an antenna array and multiple communication paths
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
US10243784B2 (en) 2014-11-20 2019-03-26 At&T Intellectual Property I, L.P. System for generating topology information and methods thereof
US10243270B2 (en) 2016-12-07 2019-03-26 At&T Intellectual Property I, L.P. Beam adaptive multi-feed dielectric antenna system and methods for use therewith
US10264586B2 (en) 2016-12-09 2019-04-16 At&T Mobility Ii Llc Cloud-based packet controller and methods for use therewith
US10276907B2 (en) 2015-05-14 2019-04-30 At&T Intellectual Property I, L.P. Transmission medium 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
US10326689B2 (en) 2016-12-08 2019-06-18 At&T Intellectual Property I, L.P. Method and system for providing alternative communication paths
US10326494B2 (en) 2016-12-06 2019-06-18 At&T Intellectual Property I, L.P. Apparatus for measurement de-embedding and methods for use therewith
US10340603B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Antenna system having shielded structural configurations for assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1886488A (en) * 1987-11-27 1989-06-01 W.L. Gore & Associates, Inc. A dielectric waveguide having a plastic core

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769148A (en) * 1951-03-07 1956-10-30 Bell Telephone Labor Inc Electrical conductors
US2794959A (en) * 1952-03-01 1957-06-04 Bell Telephone Labor Inc Directional coupler for all-dielectric waveguide
US3040278A (en) * 1958-06-30 1962-06-19 Polytechnic Inst Brooklyn Broad-band single-wire transmission line
US3157726A (en) * 1960-03-01 1964-11-17 American Optical Corp Optical energy transmitting devices and method of making same
US3386787A (en) * 1963-10-25 1968-06-04 Hazeltine Research Inc Macroscopic optical waveguides
US3434774A (en) * 1965-02-02 1969-03-25 Bell Telephone Labor Inc Waveguide for millimeter and optical waves
US3542536A (en) * 1967-09-01 1970-11-24 Hazeltine Research Inc Method of forming optical waveguide by irradiation of dielectric material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769148A (en) * 1951-03-07 1956-10-30 Bell Telephone Labor Inc Electrical conductors
US2794959A (en) * 1952-03-01 1957-06-04 Bell Telephone Labor Inc Directional coupler for all-dielectric waveguide
US3040278A (en) * 1958-06-30 1962-06-19 Polytechnic Inst Brooklyn Broad-band single-wire transmission line
US3157726A (en) * 1960-03-01 1964-11-17 American Optical Corp Optical energy transmitting devices and method of making same
US3386787A (en) * 1963-10-25 1968-06-04 Hazeltine Research Inc Macroscopic optical waveguides
US3434774A (en) * 1965-02-02 1969-03-25 Bell Telephone Labor Inc Waveguide for millimeter and optical waves
US3542536A (en) * 1967-09-01 1970-11-24 Hazeltine Research Inc Method of forming optical waveguide by irradiation of dielectric material

Cited By (169)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980390A (en) * 1974-03-20 1976-09-14 Sumitomo Electric Industries, Ltd. Optical transmission fiber
US4167305A (en) * 1974-06-17 1979-09-11 Sumitomo Electric Industries Ltd. Optical transmission fiber
US4000936A (en) * 1974-07-30 1977-01-04 Bell Telephone Laboratories, Incorporated Optical fiber jacket designs for minimum distortion loss
US3965448A (en) * 1975-05-07 1976-06-22 The United States Of America As Represented By The Secretary Of The Navy Waveguide isolator with damping means
US4216449A (en) * 1977-02-11 1980-08-05 Bbc Brown Boveri & Company Limited Waveguide for the transmission of electromagnetic energy
US4318064A (en) * 1977-05-20 1982-03-02 Patelhold Patentverwertungs- & Elektro-Holding Ag Resonator for high frequency electromagnetic oscillations
US4556855A (en) * 1983-10-31 1985-12-03 The United States Of America As Represented By The Secretary Of The Navy RF Components and networks in shaped dielectrics
US4825221A (en) * 1985-01-16 1989-04-25 Junkosha Co., Ltd. Directly emitting dielectric transmission line
EP0304141A2 (en) * 1987-08-17 1989-02-22 W.L. GORE & ASSOCIATES, INC. A dielectric waveguide
EP0304141A3 (en) * 1987-08-17 1989-05-17 W.L. Gore & Associates, Inc. A dielectric waveguide
US4875026A (en) * 1987-08-17 1989-10-17 W. L. Gore & Associates, Inc. Dielectric waveguide having higher order mode suppression
US4792774A (en) * 1987-09-29 1988-12-20 W. L. Gore & Associates, Inc. Dielectric waveguide having higher order mode suppression filters
EP0335570A1 (en) * 1988-04-01 1989-10-04 Junkosha Co. Ltd. Transmission Line
US10009065B2 (en) 2012-12-05 2018-06-26 At&T Intellectual Property I, L.P. Backhaul link for distributed antenna system
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
US9999038B2 (en) 2013-05-31 2018-06-12 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
US10051630B2 (en) 2013-05-31 2018-08-14 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9930668B2 (en) 2013-05-31 2018-03-27 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9472840B2 (en) * 2013-06-12 2016-10-18 Texas Instruments Incorporated Dielectric waveguide comprised of a core, a cladding surrounding the core and cylindrical shape conductive rings surrounding the cladding
US9661505B2 (en) 2013-11-06 2017-05-23 At&T Intellectual Property I, L.P. Surface-wave communications and methods thereof
US9674711B2 (en) 2013-11-06 2017-06-06 At&T Intellectual Property I, L.P. Surface-wave communications and methods thereof
US9876584B2 (en) 2013-12-10 2018-01-23 At&T Intellectual Property I, L.P. Quasi-optical coupler
US9794003B2 (en) 2013-12-10 2017-10-17 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
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
US10063280B2 (en) 2014-09-17 2018-08-28 At&T Intellectual Property I, L.P. Monitoring and mitigating conditions in a communication network
US9906269B2 (en) 2014-09-17 2018-02-27 At&T Intellectual Property I, L.P. Monitoring and mitigating conditions 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
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
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
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
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
US9960808B2 (en) 2014-10-21 2018-05-01 At&T Intellectual Property I, L.P. Guided-wave transmission device 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
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
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
US9769020B2 (en) 2014-10-21 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for responding to events affecting communications in a communication network
US9780834B2 (en) 2014-10-21 2017-10-03 At&T Intellectual Property I, L.P. Method and apparatus for transmitting electromagnetic waves
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
US9948355B2 (en) 2014-10-21 2018-04-17 At&T Intellectual Property I, L.P. Apparatus for providing communication services 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
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
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
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
US9712350B2 (en) 2014-11-20 2017-07-18 At&T Intellectual Property I, L.P. Transmission device with channel equalization and control and methods for use therewith
US9654173B2 (en) 2014-11-20 2017-05-16 At&T Intellectual Property I, L.P. Apparatus for powering a communication device and methods thereof
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
US10009067B2 (en) 2014-12-04 2018-06-26 At&T Intellectual Property I, L.P. Method and apparatus for configuring a communication interface
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
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
JP2016178402A (en) * 2015-03-19 2016-10-06 株式会社Nttドコモ Wireless antenna, wireless communication system
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
US9793954B2 (en) 2015-04-28 2017-10-17 At&T Intellectual Property I, L.P. Magnetic 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
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
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
US10276907B2 (en) 2015-05-14 2019-04-30 At&T Intellectual Property I, L.P. Transmission medium and methods for use therewith
US10128553B2 (en) 2015-05-14 2018-11-13 At&T Intellectual Property I, L.P. Transmission medium having multiple cores 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
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
US9935703B2 (en) 2015-06-03 2018-04-03 At&T Intellectual Property I, L.P. 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
US9912382B2 (en) 2015-06-03 2018-03-06 At&T Intellectual Property 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
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
US9866309B2 (en) 2015-06-03 2018-01-09 At&T Intellectual Property I, Lp 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
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
US9608692B2 (en) 2015-06-11 2017-03-28 At&T Intellectual Property I, L.P. Repeater and methods for use therewith
US10142086B2 (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
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
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
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
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
US9947982B2 (en) 2015-07-14 2018-04-17 At&T Intellectual Property I, Lp Dielectric transmission medium connector and methods for use therewith
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
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
US9853342B2 (en) 2015-07-14 2017-12-26 At&T Intellectual Property I, L.P. Dielectric transmission medium connector and methods for use therewith
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
US9628116B2 (en) 2015-07-14 2017-04-18 At&T Intellectual Property I, L.P. Apparatus and methods for transmitting wireless signals
US10170840B2 (en) 2015-07-14 2019-01-01 At&T Intellectual Property I, L.P. Apparatus and methods for sending or receiving electromagnetic signals
US10148016B2 (en) 2015-07-14 2018-12-04 At&T Intellectual Property I, L.P. Apparatus and methods for communicating utilizing an antenna array
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
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
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
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
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
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
US9806818B2 (en) 2015-07-23 2017-10-31 At&T Intellectual Property I, Lp Node device, repeater 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
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
US9948333B2 (en) 2015-07-23 2018-04-17 At&T Intellectual Property I, L.P. Method and apparatus for wireless communications to mitigate 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
US9912027B2 (en) 2015-07-23 2018-03-06 At&T Intellectual Property I, L.P. Method and apparatus for exchanging communication signals
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
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
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
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
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
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
WO2017191409A1 (en) * 2016-05-03 2017-11-09 Universite de Bordeaux Plastic waveguide for the propagation of waves in the frequency range comprised between 1 ghz and 10 thz
FR3051075A1 (en) * 2016-05-03 2017-11-10 Univ Bordeaux Together for the propagation of waves in the frequency range between 1 GHz and 10 THz
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
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
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
US10291334B2 (en) 2016-11-03 2019-05-14 At&T Intellectual Property I, L.P. System 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
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
US10340601B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Multi-antenna system and methods for use therewith
US10090594B2 (en) 2016-11-23 2018-10-02 At&T Intellectual Property I, L.P. Antenna system having structural configurations for assembly
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
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
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
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
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
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
US10168695B2 (en) 2016-12-07 2019-01-01 At&T Intellectual Property I, L.P. Method and apparatus for controlling an unmanned aircraft
US10027397B2 (en) 2016-12-07 2018-07-17 At&T Intellectual Property I, L.P. Distributed 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
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
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
US10326689B2 (en) 2016-12-08 2019-06-18 At&T Intellectual Property I, L.P. Method and system for providing alternative communication paths
US9998870B1 (en) 2016-12-08 2018-06-12 At&T Intellectual Property I, L.P. Method and apparatus for proximity sensing
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
US10103422B2 (en) 2016-12-08 2018-10-16 At&T Intellectual Property I, L.P. Method and apparatus for mounting network devices
US10264586B2 (en) 2016-12-09 2019-04-16 At&T Mobility Ii Llc Cloud-based packet controller and methods for use therewith
US9838896B1 (en) 2016-12-09 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for assessing network coverage
US10340983B2 (en) 2016-12-09 2019-07-02 At&T Intellectual Property I, L.P. Method and apparatus for surveying remote sites via guided wave communications
US9973940B1 (en) 2017-02-27 2018-05-15 At&T Intellectual Property I, L.P. Apparatus and methods for dynamic impedance matching of a guided wave launcher
US10298293B2 (en) 2017-03-13 2019-05-21 At&T Intellectual Property I, L.P. Apparatus of communication utilizing wireless network devices

Also Published As

Publication number Publication date
DE2061052C3 (en) 1976-01-02
FR2070897A1 (en) 1971-09-17
DE2061052A1 (en) 1971-06-24
NL7018357A (en) 1971-06-21
GB1338384A (en) 1973-11-21
DE2061052B2 (en) 1975-05-07
FR2070897B1 (en) 1974-08-23

Similar Documents

Publication Publication Date Title
Chen et al. Low-loss subwavelength plastic fiber for terahertz waveguiding
Goubau Open wire lines
US4553112A (en) Overmoded tapered waveguide transition having phase shifted higher order mode cancellation
Olver et al. Dielectric cone loaded horn antennas
EP0783117B1 (en) Optical fibers for optical attenuation
US2912695A (en) Corrugated wave guide devices
CA1223722A (en) Foamed polymers having low loss at microwave frequencies
Kawakami et al. Characteristics of a doubly clad optical fiber with a low-index inner cladding
US3907955A (en) Process for manufacturing electrically conductive polytetrafluoroethylene tube
EP0026937A1 (en) Single mode optical fibers
US5539851A (en) Hybrid optical fiber/copper coaxial data transmission cable
CN100505112C (en) Communication cable whose insulated conductors are parallelly-opposite-arranged into bundle
US4825221A (en) Directly emitting dielectric transmission line
US3386043A (en) Dielectric waveguide, maser amplifier and oscillator
US20010020373A1 (en) Method of fabricating photonic structures
EP0665987B1 (en) A radiating coaxial cable and a method for making the same
US2436421A (en) Flexible wave guide for ultra high frequency energy
US6812895B2 (en) Reconfigurable electromagnetic plasma waveguide used as a phase shifter and a horn antenna
US4994818A (en) Scanning tip for optical radiation
US3433890A (en) Signal transmission cable
Koizumi et al. New light-focusing fibers made by a continuous process
Yeh et al. Thin-Ribbon Tapered Coupler for Dielectric Waveguides
Lai et al. Low-index terahertz pipe waveguides
US4408089A (en) Extremely low-attenuation, extremely low radiation loss flexible coaxial cable for microwave energy in the gigaHertz frequency range
CN100440386C (en) Cable with foamed plastic insulation comprising an ultra-high die swell ratio polymeric material

Legal Events

Date Code Title Description
AS Assignment

Owner name: BRITISH TELECOMMUNICATIONS

Free format text: THE BRITISH TELECOMMUNICATIONS ACT 1981 (APPOINTED DAY) ORDER 1981;ASSIGNOR:POST OFFICE;REEL/FRAME:004976/0248

Effective date: 19871028

Owner name: BRITISH TELECOMMUNICATIONS

Free format text: THE BRITISH TELECOMMUNICATIONS ACT 1981 (APPOINTED DAY) ORDER 1981;ASSIGNOR:POST OFFICE;REEL/FRAME:004976/0307

Effective date: 19871028

Owner name: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Free format text: THE TELECOMMUNICATIONS ACT 1984 (NOMINATED COMPANY) ORDER 1984;ASSIGNOR:BRITISH TELECOMMUNICATIONS;REEL/FRAME:004976/0276

Effective date: 19871028

Owner name: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Free format text: THE BRITISH TELECOMMUNICATIONS ACT 1984. (1984 CHAPTER 12);ASSIGNOR:BRITISH TELECOMMUNICATIONS;REEL/FRAME:004976/0291

Effective date: 19871028

Owner name: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Free format text: THE BRITISH TELECOMMUNICATION ACT 1984. (APPOINTED DAY (NO.2) ORDER 1984.;ASSIGNOR:BRITISH TELECOMMUNICATIONS;REEL/FRAME:004976/0259

Effective date: 19871028