US3055967A - Coaxial cable with low effective dielectric constant and process of manufacture - Google Patents

Coaxial cable with low effective dielectric constant and process of manufacture Download PDF

Info

Publication number
US3055967A
US3055967A US113540A US11354061A US3055967A US 3055967 A US3055967 A US 3055967A US 113540 A US113540 A US 113540A US 11354061 A US11354061 A US 11354061A US 3055967 A US3055967 A US 3055967A
Authority
US
United States
Prior art keywords
jacket
tubes
conductor
elements
cable
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
US113540A
Other languages
English (en)
Inventor
Lewis A Bondon
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US113540A priority Critical patent/US3055967A/en
Priority to LU41703A priority patent/LU41703A1/xx
Priority to DE1962B0067339 priority patent/DE1440771B2/de
Priority to GB19715/62A priority patent/GB989815A/en
Priority to SE5829/62A priority patent/SE311547B/xx
Priority to BE618230A priority patent/BE618230A/fr
Priority to NO144535A priority patent/NO122534B/no
Priority to FR898940A priority patent/FR1326776A/fr
Application granted granted Critical
Publication of US3055967A publication Critical patent/US3055967A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/067—Insulating coaxial cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1834—Construction of the insulation between the conductors
    • H01B11/1843—Construction of the insulation between the conductors of tubular structure

Definitions

  • the present invention relates to high frequency coaxial cable and particularly such cable having a very low effective dielectric constant.
  • the present invention also relates to a method of manufacture of coaxial cable, particularly adapted to the coaxial cable of the present invention.
  • the present invention will find greatest application in the field of radio frequency coaxial cables and accordingly the features of the present invention will be discussed primarily with reference to this application. It should be understood, however, that the use of the present invention is not limited to radio frequency cables but that the present invention may be applied to other uses in the electrical art.
  • radio frequency cables of the coaxial type are known in the art.
  • Such cables have two conductors, an outer conductor generally of annular crosssection and an inner conductor having a common center. that is coaxial with the outer conductor.
  • the spacing between these conductors and the electrical properties of the intermediate material between these conductors has a profound influence upon the electrical characteristics of the cable. It is therefore necessary to support these conductors in such a way that they remain concentric and at the same time utilize the optimum electrical properties of the material in the space between the inner and outer conductors.
  • the most desired property for the intermediate material is a lowest dielectric constant.
  • the lowest dielectric constants obtainable are those of a vacuum, air or other gases.
  • the best solid dielectrics have substantially higher dielectric constants than that of air and other gases and thus produce inferior attenuation properties. so the use of solid dielectrics does not completely solve the structural problem. monly manufactured by extrusion and in the process of extruding the center conductor within the core of solid material it is exceedingly difiicult to maintain the center conductor properly located in the center of the core of dielectric material and in random contact with the dielectric.
  • a different approach to this problem has been to minimize the supporting structure and to fill the intermediate space between conductors with air or another gas.
  • beads of glass or ceramic material have been utilized in spaced positions along the cable center conductor to support the center conductor within the outer conductor.
  • Helical type supports consisting of a spiraled plastic supporting structure wound on the center con ductor have also been utilized.
  • Insulated electrical conductors utilize an array of insulating tubes laid about a conductor and pressed into uniform and continuous contact with it to form a symmetrical array wherein the insulating crosssection provides a maximal amount of air space and a minimal amount of dielectric mass. At the same time a high degree of structural integrity is provided so that the resulting arrangement provides the best physical features of solid dielectric while approaching the air dielectric construction optimum electrical properties.
  • the present invention provides an improvement over the insulated electrical conductor configuration disclosed in my prior copending application Serial No. 730,345, now Patent 2,998,472 issued August 29, 1961, in that portions of the insulating tubes are eliminated in order that the critical volume adjacent to the center conductor be occupied by a higher proportion of air.
  • the effective dielectric constant of the coaxial cable is improved but the physical characteristics of the cable may be maintained substantially unimpaired.
  • Insulated electrical conductors according to the present invention can be fabricated by a method herein disclosed which is of remarkable simplicity and thereby greatly reduces the labor cost of producing electrical conductors over that of more complicated production methods.
  • the method which will be disclosed hereinafter is also capable of being practiced with very little specially constructed apparatus. For the most part, only simple, well known types of cable-assembly and tube-drawing apparatus are required.
  • a preferred method of manufacture as later described in more detail consists primarily in assembling insulating tubing having notches in at least one side of each tube and a conductor element in a loose array generally corresponding to the desired final configuration and inserting the insulating tubing and conductors into a length of hard jacket while maintaining the general configuration of the array. Therefore the jacket of metal, organic material or other semi-rigid material, is drawn or otherwise reduced in size with respect to the cross-section of the tubing, or the tubing enlarged radially beyond its dimension at insertion, to cause the insulating tubes and c0nductors to be tightly packed into an array of the desired configuration. As a result the insulating tubing and the conductor or conductors are immovably secured within tubing adjacent the conductor so that a low effective dielectric constant is obtained.
  • FIGURE 1 is a perspective cutaway view of a coaxial cable according to the present invention.
  • FIGURE 2 is a transverse cross-sectional view of the coaxial cable of FIG. 1;
  • FIGURE 3 is a transverse cross-sectional view of the coaxial cable of FIGS. 1 and 2 as it would appear during the course of manufacture;
  • FIGURE 4 is a partially cut-away plan view of the coaxial cable of FIGS. 1 and 2;
  • FIGURE 5 is a sectional partially schematic view of apparatus for assembling the component elements of the cable of FIGS. l-4;
  • FIGURE 6 is a sectional view taken in FIG. 5.
  • FIG. 1 shows an insulated electrical conductor in the form of a coaxial cable 11.
  • the cable is formed with an external jacket 12 of conductive material such as aluminum or copper alloys.
  • the jacket 12 be of a high-conductivity semi-rigid material, i.e. material often referred to in the trade as semi-flexible and which may be bent and re-formed without deformation or loss of electrical and mechanical advantages.
  • the aluminum tubing of FIG. 1 is merely exemplary and the jacket could be formed of other metals or organic or other materials.
  • the jacket 12 need not be in the form of tubing. It may, for example, be a wound armored type covering such as that utilized in the familiar BX cable, or round wire or hat wire braiding.
  • the center conductor 13 may be formed of copper or any other suitable conducting material such as aluminum.
  • the center conductor 13 is shown to be solid in the cable illustrated in FIG. 1; however, the center conductor 13 may be hollow and in some cases this will be desirable to produce a saving of material and weight.
  • the center conductor 13 is rigidly secured within the jacket 12 due to its placement within an array of tubes 14 of non-conducting or insulating material. In FIG. 1 the tubes 14 are formed with relatively thin walls so that the volume between the center conductor 13 and the outer jacket v12 is filled primarily with air or such other 'gas as may be placed within the jacket 12.
  • the tubes 14 within the jacket 12 are not circular in shape. This is most readily apparent in FIG. 2. In some cases it might be desirable to form the tubes 14 in a non-circular shape but in the device shown in FIGS. 1 and 2, it is contemplated that the tubes 14 would originally be formed in circular shape and that they together with the center conductor 13 would be placed within the jacket 12 and forceably deformed to the shape shown in FIG. 2. It should further be understood that throughout the specification and claims the word tube is to be construed to include both filled and unfilled tubes and elongated rods whether they behollow or not. For example, cellular rods of foamed plastic or elastomeric material may be used, such as foam rubber, foamed polyethylenes and polyurethanes.
  • the tubes 14 are provided with notches illustrated as triangular in form.
  • gaseous dielectric has a substantially lower dielectric constant than the best available solid along lines 66 material for tubes 14, the effective dielectric constant of the cable 11 is substantially improved by provision of the notches 15.
  • the improvement in dielectric constant is substantially greater than would be expected from the amount of material removed due to the fact that the electric field is stronger in the vicinity of the center conductor and thus removal of material from the volume immediately surrounding the center conductor provides a proportionately larger decrease in effective dielectric constant.
  • a material which would provide an effective dielectric constant of 2.3 if extruded or otherwise placed in the cable to completely fill the space between center conductor and jacket may be expected to provide an effective dielectric constant of approximately 1.45 were it to be used in a construction having tubular insulating members without notches. If the tubular insulating members are then provided with notches according to the present invention, a further improvement may be expected to a value of effective dielectric constant of approximately 1.3.
  • the significance of the difference between an effective dielectric constant of 1.3 as compared with an effective dielectric constant of 1.45 is better realized when it is pointed out that the value of 1.45 is 50% farther removed from the optimum value of 1.00 than is the value of approximately 1.30 provided by the present invention.
  • the coaxial type insulated electrical conductor of FIGS. 1 and 2 is normally used for the transmission of radio frequency electrical energy and in such a case the sizes of the outer conductor or jacket 12 and the inner conductor 13 are of importance in determining the electrical characteristics of the coaxial cable. Also the properties of the material placed between the cent-er conductor 13 and the jacket 12 are of importance in determining the electrical properties of the cable. To a lesser extent the properties of the conductive materials of which the jacket 12 and the center 13 are formed are also important.
  • a cable of inch nominal outside diameter may be constructed to give a nominal cutoif frequency of 15 kmc./s.; /2 inch O.D. to give 10 krnc./ s. nominal cutoff; /3 inch CD. to give 5000 mc./ s. nominal cutoff, and 1 /3 inch 0D. to give 2800' mc./s. nominal cutoff.
  • tubes may be utilized in the construction of the above described devices. It is obviously desirable to utilize a material for the tubes 14 (where they are to be used in radio frequency transmission cable) which has a minimum dielectric constant while still having sufficient physical strength and other necessary properties. As previously mentioned the tubes 14 may be either hollow, as would usually be the case for radio frequency energy transmission, or in some cases they may be solid.
  • the tubes 14 can be utilized for many diverse types of insulating material such as natural or synthetic rubber, neoprene, copolymers of butadiene and styrene or acrylonitrile, polyisobutylene, isoprene, polystyrene and vinyl compounds such as polymers and copolymers of vinyl chloride, vinyl acetate and vinylidene compounds.
  • the tubes can be made of reinforced material.
  • the tubing can be made of glass fibers impregnated o-r reinforced with any of the above mentioned materials and additionally containing silicone or reinforcing silicone rubber.
  • notches 15 extend to only a limited extent into tubes 14 so that the virtual wall described above is maintained intact and the notches 15 provide access only to the interior of tubes 14 which is still separated -from the jacket 12 by the outer wall of tubes 14.
  • notches such as 15 need not necessarily be limited to one side of the tube 14 so long as a smooth surface is provided or other suitable means along the sides of the insulating tubes 14 where they are in mutual contact to avoid the existence of an air gap between jacket 12 and CI1ta conductor '13.
  • the wavelength will diminish to the point where the notches 15 are no longer very small compared to a wavelength and an undesirable frequency sensitivity will be introduced. This will not affect the operation of the cable for lower radio frequencies and is not as serious as might be expected for the higher frequencies for several reasons.
  • the cable has an inherent cut-off frequency, and in many cases the notches 15 can be sufliciently closely spaced so that they produce no appreciable effect below the inherent cut-off frequency of the cable.
  • the effective pitch of the notches can be made substantially less than the effective spacing between the surfaces Since the notches can be quite closely spaced, for example While the notches 15 have been illustrated as triangular in section, other shapes may be preferred in particular instances and the notches could be rectangular, semicircular, or of other shape within the scope of the invention.
  • the cable of this invention is easily cut, dressed and handled without the necessity for special preparation or special tools. No bulky flaring tools, hot knives or irons are required as in the case of wedged or laminated membrane type supporting elements which require special treatment and handling where the outer jacket is removed.
  • FIGS. 5 and 6 apparatus is shown, partially schematically, for assembling the elements of the coaxial cable to form a cable according to the present invention.
  • reels 21 are schematically illustrated for supplying insulator tubing to be assembled into the cable.
  • Reel 22 is provided to supply center conductor 13 for the assembly.
  • a guider 23 is provided with spaced openings 24 for insulator tubes 14 together with a central opening 25 to guide the center conductor 13.
  • the apertures 24 for insulator tubes 14 are spaced to a substantially greater extent in guider die 23 than will be the tubes 14 when initially assembled in the jacket 12. Room is thereby provided for a cutting mechanism including a stud 26 on which there is rotatably mounted a fly cutter blade 28 integrally formed with a pulley 27.
  • a belt 31 resides in a channel 29 of pulley 27 and a further pulley 30 connected to a suitable source of power (not shown) serves to drive the fly cutter blade 28.
  • Pitch of the notches 15 cut in tubes 14 is preferably controlled by synchronizing the speed of rotation of slide cutter blade 28 with the movement of tubes 14, for example, by synchronizing the drive pulley 30 with the pay off rate of reels 21.
  • the arrangement of FIG. 5 inherently causes the notches 15 in the various tubes 14 to be staggered relative to one another, thus providing the advantage with respect to frequency sensitivity previously described. While it is assumed that frequency sensitivity is generally undesirable, it is not impossible that frequency sensitivity might be desired in special cases, in which case the notches could be arranged to provide the desired sensitivity.
  • notching mechanism illustrated in FIG. 5 is given purely by way of example and it will be appreciated that other notching mechanisms with rotating or reciprocating cutters could be provided to carry out the method of manufacture herein described.
  • notches in tubes 14 need not be cut in conjunction with the assembly operation but rather may be formed by cutting or otherwise in a preliminary operation in which case the tubing would feed off of reels 21 with the notches already provided. In such a case a guiding mechanism would preferably be provided to assure that the notches 15 are placed toward the center of the cable configuration. Also metering reels having teeth mating with notches 15 may be provided and interlinked to provide any desired relative position between notches of respective ones of the tubes 14.
  • tubes 14 and center conductor 13 continue through the apparatus to a secondary guiding die 32 which causes the tubes 14 and conductor 13 to be smoothly guided into a jacket 12 which is slightly larger than the combined dimension of tubes 14 and conductor 13 (for example, by a factor of 10 to 15%). It will be appreciated that with 10 to 15% extra room within jacket 12 the tubes 14 and conductor 13 may readily be drawn into a long length of jacket 12 with comparatively little force required.
  • the force for pulling tubes 14 and conductor 13 may be provided by a winch or any other suitable means connected to a cable 35 which may be secured by means of a clamp 34 and a woven wire harness 33 to the ends of tubes 14 and conductor 13.
  • FIG. 2 shows the cross-section of the elements of FIG. 3 after the jacket 12 has been reduced to the desired diameter.
  • substantial deformation has been made in the tubes 14 in FIG. 2, it is obvious that a lesser amount of deformation may be made. It is only necessary that the array of insulating tubes 14 and the inner conductor 13 be securely held to retain the inner conductor 13 in position in the center of the jacket 12. Additional advantages accrue from making the insulating tubes 14 of readily deformable material in that the reduced diameter of the outer jacket is considerably less critical and any variation on the intended diameter is easily absorbed by more or less deformation of the insulating tubes 14.
  • a primary advantage of the method is that no particular precautions for accurate positioning of the inner conductor within its supporting elements are necessary due to the face that the inner conductor is automatically centered in its jacket 12 when the jacket is reduced due to the fact that the stresses in the various insulating tubes 14 will equalize themselves to center the inner conductor 13. This follows from the fact that the various tubes surrounding the inner conductor 13 are substantially identical and are uniform throughout their length. This is not a particularly critical condition however, and reasonable variations in the tubing 14 can be tolerated without producing an undue eccentricity of the center conductor 13.
  • the internal elements can be assembled in a desired configuration before or as they are placed in the jacket.
  • an armored type jacket can be wound over the internal elements rather than compressing a solid tube jacket on the elements as desired.
  • While the particular form of cable shown by way of illustration in the drawings comprises six insulating tubes 14 arranged around a center conductor 13, all of substantially equal diameter, it will be appreciated that such a configuration will provide only a limited range of outer conductor diameter to inner conductor diameter ratios. Considerably more variation in such ratios is desirable in order to provide a range of characteristic impedances for coaxial cables. This is accomplished by utilizing a greater or lesser number of insulating tubes 14 (not less than three such tubes).
  • a progressively smaller diameter center conductor 13 is provided so that irrespective of the number of insulating tubes 14 the uncompressed array of insulating tubes 14 together with a central center conductor 13 forms a stable array of elements which will necessarily be deformed to symmetric configuration upon reduction in the diameter of jacket 12.
  • the size of the insulating elements with respect to the conductor element is such that in the undeformed condition of the array the size of the elements is such to place each of the elements in contact with at least three other of the elements, regardless of the number of insulating tubes in the array.
  • the present invention provides a number of types of coaxial cables which are suitable for various applications and have many advantageous features, among which are simplicity of manufacture, ready availability ofcom ponents, physical strength and superior electrical char-' acteristics, particularly low effective dielectric constant. A method of manufacture of great efficiency is also provided.
  • An insulated electrical conductor assembly comprising a hollow substantially cylindrical jacket and a plurality of elongated elements within said jacket, one of said elongated elements being a conductor element and at least three of which are substantially deformed non-conductive elements of normally equal circular crosssection when in undeformed condition, said non-conductive elements being formed of resiliently deformable material, said elements being placed in a tightly packed array with non-conductive elements being the outermost elements of said array and with said conductor element in the center of said array, said conductor element being surrounded by non-conductive elements having their respective surfaces in continuous intimate contact with at least two adjacent non-conductive elements thereby avoiding any internal free path between conductive components of said assembly, each said non-conductive element having a series of substantially transverse notches extending the length of said non-conductive element and located adjacent said conductor element, said jacket having an inside transverse dimension less than the maximum said array of elements in undeformed condition, and the size of said non-conductive elements being when in undeformed condition substantially the size which would place each of said elements in contact with at least three other of
  • An insulated electrical conductor assembly comprising a hollow substantially cylindrical jacket, and a plurality of elongated elements within said jacket, one of said elongated elements being a conductor element with a peripherally continuous cross-section and at least three of which are substantially deformed hollow nonconductive elements of normally equal circular crosssection when in undeformed condition, said non-conductive elements being formed of resiliently deformable material, said elements being placed in a transversely ordered tightly-packed array with non-conductive elements being the outermost elements of said array and with said conductor element in the center of said array, said conductor element being surrounded by non-conductive elements having their respective surfaces in continuous intimate contact with at least two adjacent non-conductive elements thereby avoiding any internal free path between conductive components of said assembly, each said nonconductive element having a series of substantially transverse notches extending the length of said non-conductive element and located adjacent said conductor element, said jacket having an inside transverse dimension less than the maximum transverse dimension of said array of eletransverse dimension of undeformed condition substantially the size which would place each of said elements in contact
  • the method of manufacturing a coaxial cable as sembly comprising the steps of placing a plurality of elongated elements into a hollow elongated jacket of permanently deformable material, said elongated elements including at least one conductor element and at least three substantially equal-diameter cylindrical resiliently deformable non-conductive elements, each said non-conductive element having a series of substantially transverse notches extending the length of said non-conductive element, the placing of said non-conductive elements in said jacket being with said notches of said non-conductive elements toward the center of said jacket and said conductor element arranged in the center of said non-conductive elements, said elongated elements being placed into said jacket in an array in which each elongated element may simultaneously be placed in tangential contact with at least three other elongated elements Without substantial deformation of any said elements, the inside dimension of said jacket being larger than said array of elongated elements; and progressively reducing the transverse dimension of said jacket throughout its length to cause said elongated elements progressively along the length of the jacket to be
  • an insulated conductor assembly comprising the steps of guiding a plurality of elongated elements into a transversely spaced array, said elongated elements including a conductor element in the center of said array and at least three substantially equal diameter resiliently deformable non-conductive elements arranged around and spaced from said conductor element; passing said elongated elements by a cutter to cut a series of transverse notches throughout the length of said nonconductive elements, said notches being on the surface of said non-conductive elements facing said conductor element; drawing said elongated elements into a compact array maintaining the relative position of said elements and the notches thereon; placing said elongated elements into a hollow elongated jacket of permanently deformable material, said elongated elements being placed into said jacket in an array in which each elongated element may simultaneously be placed in tangential contact with at least three other elongated elements without substantial deformation of any of said elements, the inside dimension of said jacket being larger than said array of elongated elements, and progressively

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Communication Cables (AREA)
  • Cable Accessories (AREA)
  • Waveguides (AREA)
  • Tires In General (AREA)
US113540A 1961-05-29 1961-05-29 Coaxial cable with low effective dielectric constant and process of manufacture Expired - Lifetime US3055967A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US113540A US3055967A (en) 1961-05-29 1961-05-29 Coaxial cable with low effective dielectric constant and process of manufacture
LU41703A LU41703A1 (fr) 1961-05-29 1962-05-14
DE1962B0067339 DE1440771B2 (de) 1961-05-29 1962-05-21 Koaxiale Hochfrequenzleitung
GB19715/62A GB989815A (en) 1961-05-29 1962-05-22 Improved electrical conductor assembly and method of making same
SE5829/62A SE311547B (fr) 1961-05-29 1962-05-24
BE618230A BE618230A (fr) 1961-05-29 1962-05-28 Câble coaxial
NO144535A NO122534B (fr) 1961-05-29 1962-05-28
FR898940A FR1326776A (fr) 1961-05-29 1962-05-28 Perfectionnements aux câbles coaxiaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US113540A US3055967A (en) 1961-05-29 1961-05-29 Coaxial cable with low effective dielectric constant and process of manufacture

Publications (1)

Publication Number Publication Date
US3055967A true US3055967A (en) 1962-09-25

Family

ID=22350026

Family Applications (1)

Application Number Title Priority Date Filing Date
US113540A Expired - Lifetime US3055967A (en) 1961-05-29 1961-05-29 Coaxial cable with low effective dielectric constant and process of manufacture

Country Status (7)

Country Link
US (1) US3055967A (fr)
BE (1) BE618230A (fr)
DE (1) DE1440771B2 (fr)
GB (1) GB989815A (fr)
LU (1) LU41703A1 (fr)
NO (1) NO122534B (fr)
SE (1) SE311547B (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614926A (en) * 1985-02-06 1986-09-30 Hughes Aircraft Company High-power coaxial cable
US4700159A (en) * 1985-03-29 1987-10-13 Weinschel Engineering Co., Inc. Support structure for coaxial transmission line using spaced dielectric balls
US4705914A (en) * 1985-10-18 1987-11-10 Bondon Lewis A High voltage flexible cable for pressurized gas insulated transmission line
WO2001029848A1 (fr) * 1999-10-16 2001-04-26 Raydex/Cdt Ltd. Cables avec matieres de remplissage
US6441706B1 (en) 2000-12-13 2002-08-27 Radio Frequency Systems, Inc. Seal for an RF connector
US20040256139A1 (en) * 2003-06-19 2004-12-23 Clark William T. Electrical cable comprising geometrically optimized conductors
US20050023028A1 (en) * 2003-06-11 2005-02-03 Clark William T. Cable including non-flammable micro-particles
US20050056454A1 (en) * 2003-07-28 2005-03-17 Clark William T. Skew adjusted data cable
US20060169478A1 (en) * 2005-01-28 2006-08-03 Cable Design Technologies, Inc. Data cable for mechanically dynamic environments
US20080041609A1 (en) * 1996-04-09 2008-02-21 Gareis Galen M High performance data cable
US20090071691A1 (en) * 2005-12-09 2009-03-19 Belden Technologies, Inc. Twisted pair cable having improved crosstalk isolation
US20090120664A1 (en) * 1997-04-22 2009-05-14 Belden Technologies, Inc. Data cable with cross-twist cabled core profile
US20090173514A1 (en) * 2007-11-19 2009-07-09 Gareis Galen M Separator Spline and Cables Using Same
US20100263907A1 (en) * 2006-03-06 2010-10-21 Belden Technologies, Inc. Web for separating conductors in a communication cable
US20110005806A1 (en) * 2004-11-17 2011-01-13 Belden Cdt (Canada) Inc. High performance telecommunications cable
US20110155419A1 (en) * 1997-04-22 2011-06-30 Cable Design Technologies Inc. dba Mohawk/CDT Enhanced Data cable with cross-twist cabled core profile
US20110209892A1 (en) * 2008-10-30 2011-09-01 Huber+Suhner Ag Coaxial cable
US20140076608A1 (en) * 2012-09-14 2014-03-20 Hitachi Metals, Ltd. Foamed coaxial cable and multicore cable
US20140299348A1 (en) * 2013-04-08 2014-10-09 Nexans Data transmission cable intended for the aeronautical industry
US20140367143A1 (en) * 2013-06-17 2014-12-18 Hitachi Metals, Ltd. Coaxial cable
US20170066392A1 (en) * 2015-09-09 2017-03-09 Yazaki Corporation Wire harness
US9954308B2 (en) 2013-11-19 2018-04-24 Yazaki Corporation Terminal-attached electric wire
CN112080127A (zh) * 2019-06-13 2020-12-15 北京化工大学 一种高介电低模量的共混型介电弹性体及其制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556244A (en) * 1945-09-07 1951-06-12 Int Standard Electric Corp Coaxial cable with helically wound spacer
DE894407C (de) * 1951-09-02 1953-10-26 Siemens Ag Schaumstoffbaender oder -kerne, insbesondere zur Isolierung elektrischer Leitungen und Kabel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556244A (en) * 1945-09-07 1951-06-12 Int Standard Electric Corp Coaxial cable with helically wound spacer
DE894407C (de) * 1951-09-02 1953-10-26 Siemens Ag Schaumstoffbaender oder -kerne, insbesondere zur Isolierung elektrischer Leitungen und Kabel

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614926A (en) * 1985-02-06 1986-09-30 Hughes Aircraft Company High-power coaxial cable
US4700159A (en) * 1985-03-29 1987-10-13 Weinschel Engineering Co., Inc. Support structure for coaxial transmission line using spaced dielectric balls
US4705914A (en) * 1985-10-18 1987-11-10 Bondon Lewis A High voltage flexible cable for pressurized gas insulated transmission line
US8536455B2 (en) 1996-04-09 2013-09-17 Belden Inc. High performance data cable
US7663061B2 (en) 1996-04-09 2010-02-16 Belden Technologies, Inc. High performance data cable
US20080041609A1 (en) * 1996-04-09 2008-02-21 Gareis Galen M High performance data cable
US20100096160A1 (en) * 1996-04-09 2010-04-22 Belden Technologies, Inc. High performance data cable
US7977575B2 (en) 1996-04-09 2011-07-12 Belden Inc. High performance data cable
US8497428B2 (en) 1996-04-09 2013-07-30 Belden Inc. High performance data cable
US20110155419A1 (en) * 1997-04-22 2011-06-30 Cable Design Technologies Inc. dba Mohawk/CDT Enhanced Data cable with cross-twist cabled core profile
US8729394B2 (en) 1997-04-22 2014-05-20 Belden Inc. Enhanced data cable with cross-twist cabled core profile
US20100147550A1 (en) * 1997-04-22 2010-06-17 Belden Technologies, Inc. Data cable with striated jacket
US7696438B2 (en) 1997-04-22 2010-04-13 Belden Technologies, Inc. Data cable with cross-twist cabled core profile
US7964797B2 (en) 1997-04-22 2011-06-21 Belden Inc. Data cable with striated jacket
US20090120664A1 (en) * 1997-04-22 2009-05-14 Belden Technologies, Inc. Data cable with cross-twist cabled core profile
WO2001029848A1 (fr) * 1999-10-16 2001-04-26 Raydex/Cdt Ltd. Cables avec matieres de remplissage
US6888070B1 (en) 1999-10-16 2005-05-03 Raydex/Cdt Limited Cables including fillers
US20050167149A1 (en) * 1999-10-16 2005-08-04 Raydex/Cdt Ltd. Cables including fillers
US7173191B2 (en) 1999-10-16 2007-02-06 Raydex/Cdt Ltd. Cables including fillers
GB2355335B (en) * 1999-10-16 2004-01-21 Raydex Cdt Ltd Improvements in or relating to cables
US6441706B1 (en) 2000-12-13 2002-08-27 Radio Frequency Systems, Inc. Seal for an RF connector
US7244893B2 (en) 2003-06-11 2007-07-17 Belden Technologies, Inc. Cable including non-flammable micro-particles
US20050023028A1 (en) * 2003-06-11 2005-02-03 Clark William T. Cable including non-flammable micro-particles
US20060207786A1 (en) * 2003-06-19 2006-09-21 Belden Technologies, Inc. Electrical cable comprising geometrically optimized conductors
US20090071690A1 (en) * 2003-06-19 2009-03-19 Belden Technologies, Inc. Electrical cable comprising geometrically optimized conductors
US7462782B2 (en) 2003-06-19 2008-12-09 Belden Technologies, Inc. Electrical cable comprising geometrically optimized conductors
US20040256139A1 (en) * 2003-06-19 2004-12-23 Clark William T. Electrical cable comprising geometrically optimized conductors
US20060124342A1 (en) * 2003-07-28 2006-06-15 Clark William T Skew adjusted data cable
US7271343B2 (en) 2003-07-28 2007-09-18 Belden Technologies, Inc. Skew adjusted data cable
US20050056454A1 (en) * 2003-07-28 2005-03-17 Clark William T. Skew adjusted data cable
US7030321B2 (en) 2003-07-28 2006-04-18 Belden Cdt Networking, Inc. Skew adjusted data cable
US8455762B2 (en) 2004-11-17 2013-06-04 Belden Cdt (Canada) Inc. High performance telecommunications cable
US20110005806A1 (en) * 2004-11-17 2011-01-13 Belden Cdt (Canada) Inc. High performance telecommunications cable
US7208683B2 (en) 2005-01-28 2007-04-24 Belden Technologies, Inc. Data cable for mechanically dynamic environments
US20060169478A1 (en) * 2005-01-28 2006-08-03 Cable Design Technologies, Inc. Data cable for mechanically dynamic environments
US8198536B2 (en) 2005-12-09 2012-06-12 Belden Inc. Twisted pair cable having improved crosstalk isolation
US20090071691A1 (en) * 2005-12-09 2009-03-19 Belden Technologies, Inc. Twisted pair cable having improved crosstalk isolation
US8030571B2 (en) 2006-03-06 2011-10-04 Belden Inc. Web for separating conductors in a communication cable
US20100263907A1 (en) * 2006-03-06 2010-10-21 Belden Technologies, Inc. Web for separating conductors in a communication cable
US7897875B2 (en) 2007-11-19 2011-03-01 Belden Inc. Separator spline and cables using same
US20090173514A1 (en) * 2007-11-19 2009-07-09 Gareis Galen M Separator Spline and Cables Using Same
US20110209892A1 (en) * 2008-10-30 2011-09-01 Huber+Suhner Ag Coaxial cable
US9117572B2 (en) * 2012-09-14 2015-08-25 Hitachi Metals, Ltd. Foamed coaxial cable and multicore cable
US20140076608A1 (en) * 2012-09-14 2014-03-20 Hitachi Metals, Ltd. Foamed coaxial cable and multicore cable
US20140299348A1 (en) * 2013-04-08 2014-10-09 Nexans Data transmission cable intended for the aeronautical industry
US20140367143A1 (en) * 2013-06-17 2014-12-18 Hitachi Metals, Ltd. Coaxial cable
US9954308B2 (en) 2013-11-19 2018-04-24 Yazaki Corporation Terminal-attached electric wire
US20170066392A1 (en) * 2015-09-09 2017-03-09 Yazaki Corporation Wire harness
JP2017055540A (ja) * 2015-09-09 2017-03-16 矢崎総業株式会社 ワイヤハーネス
US10322685B2 (en) * 2015-09-09 2019-06-18 Yazaki Corporation Wire harness
CN112080127A (zh) * 2019-06-13 2020-12-15 北京化工大学 一种高介电低模量的共混型介电弹性体及其制备方法

Also Published As

Publication number Publication date
LU41703A1 (fr) 1962-07-14
DE1440771A1 (de) 1969-01-23
GB989815A (en) 1965-04-22
DE1440771B2 (de) 1970-07-02
BE618230A (fr) 1962-09-17
SE311547B (fr) 1969-06-16
NO122534B (fr) 1971-07-12

Similar Documents

Publication Publication Date Title
US3055967A (en) Coaxial cable with low effective dielectric constant and process of manufacture
US2998472A (en) Insulated electrical conductor and method of manufacture
US20190027276A1 (en) Telecommunications wire having a channeled dielectric insulator and methods for manufacturing the same
US2599857A (en) Method of manufacture of insulation for coaxial cables
US2556244A (en) Coaxial cable with helically wound spacer
US7982132B2 (en) Reduced size in twisted pair cabling
US6800811B1 (en) Communications cables with isolators
US6849799B2 (en) High propagation speed coaxial and twinaxial cable
US2035274A (en) Coaxial conductor system
US1943087A (en) Electrical cable and method of manufacture
KR101270732B1 (ko) 프로파일 절연 랜 케이블
EP1998341B1 (fr) Isolation profilée améliorée et son procédé de fabrication
US3735022A (en) Interference controlled communications cable
US2956311A (en) Method of forming a suspension-type electric transmission cable
US3227800A (en) Coaxial cable and inner conductor support member
US4487660A (en) Multiple wall structure for flexible cable using tubular and spiral corrugations
US20130126209A1 (en) Forward twisted profiled insulation for lan cables
US2585484A (en) Method of making high-frequency transmission line
EP2246863B1 (fr) Isolation profilée améliorée
US2723933A (en) Method of making preformed insulation for high voltage transformer
US2488211A (en) High-frequency cable
US2520991A (en) Method of making low-loss delay lines
US3201507A (en) Hollow conductor for power cables
US4378267A (en) Apparatus for manufacturing coaxial cable
US2814666A (en) Electrical cable