US2342736A - Radio cable - Google Patents

Radio cable Download PDF

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Publication number
US2342736A
US2342736A US397704A US39770441A US2342736A US 2342736 A US2342736 A US 2342736A US 397704 A US397704 A US 397704A US 39770441 A US39770441 A US 39770441A US 2342736 A US2342736 A US 2342736A
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US
United States
Prior art keywords
cable
conductors
conductor
khz
radio
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
US397704A
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English (en)
Inventor
Herzog Robert
Wiessner Alfred
Hintze Rudolf
Gutzmann Fritz
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Individual
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Individual
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Publication date
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Publication of US2342736A publication Critical patent/US2342736A/en
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    • 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
    • H01B11/1808—Construction of the conductors
    • H01B11/1813—Co-axial cables with at least one braided conductor

Definitions

  • the present invention has for its object to create a wide-band radio cable of constantattenuation, that is, a cable suitable for distortionless transmission'as regards frequencies up to a certain value.
  • the internal conductor, formed as a tubular conductor, and the outer conductor of the cable consist of radio strands so constructed that the limiting frequency is a multiple of the highest Working frequency.
  • the insulating compound of the cable is plastic and has a leakance constant less than 10-3.
  • the tubular internal conductor 2 consists of interlaced radio strand and is seated on a hempcord I. 3 denotes a plastic insulating compound of low losses, in which the conductor 2 is embedded in a manner to avoid any air cavities between the two.
  • the outer conductor 4 likewise consists of interlaced radio strand and is mounted .on the insulating compound 3.
  • the conductor 4 is surrounded With an insulating sheath 5 that may be of the same varietiess the compound 3 by which the conductors 2, 4 are insulated from each other.
  • a protective sheath 6 for the insulating sheath 5 may be made of any suitable artificial material.
  • the strands forming the conductors 2, 4 are each arranged as rightand left-hand lays in order that the magnetic field outside conductor 4 be substantially neutralized.
  • the conductors 2, 4 may be made of wires different in thickness but so calculated that both conductors 2, 4 are given the same hunting frequency.
  • the novel cable ZOIS 10% which means that o may acquirevalues up to the cable and the weight thereof may be made to be very small. For instance, the weight of 1000 metersof a cable whose outer diameter is about 2'7 millimeters is about r100 kilograms.
  • the small cross-sectional area of the cable is also due to ⁇ the fact that there is no air space insulation. In this regard therefore the invention entails a considerable saving in material.
  • any lead sheath may be dispensed with.
  • the sheath B of artificial material which for instance may be' composed of interlaced tapes, allows the cableto be buried in the same manneras a cable equipped with lead sheath and armouring.
  • Attenuation tests regarding a cable of this kind and relating ,to a frequency range of from 60 to 1300 kilocycles per second have given the following results: with 300 kHz., that is, 300 kilocycles per second, an. attenuation, independent of frequency, of about 72 mN./km., that is, '72 millinepers per kilometer, was obtained. From 300 kHz. onward the attenuation rises. For instance. with about 600 kHz. it amounts to mN./km., with 1000 kHz. to 126 mN./km., and with 1300 kHz. to mN./km, It will thus be seen that with 300 kHz.
  • the attenuation solely depends on the ohmic resistance of the conductors 2, 4 ,and that even in the case of higher frequencies the leakance loss'does not appreciably affect the total attenuation. For example, with 200 kHz. the leakance loss is 1.6%, while with 400 kHz. it is .3.7% and with 1000 kHz. it amounts to 8.5% of the total attenuation.
  • a concentric cable for transmitting a working frequency range comprising a tubular inner conductor and an outer conductor concentrically around the inner conductor, said conductors both being made of conducting strands interleaved in right and left hand lays, the strands of the outer conductor being of greater thickness than those of the inner conductor, and each of said conductors having the same limiting frequency, said limiting frequency being a multiple of the highest working frequency.
  • a wide-band radio cable of constant attenuation comprising concentrically spaced tubular inner and outer conductors insulated from each other, the two conductors being formed of wire strands interleaved in right and left hand lays, the strands of the outer conductor being of greater thickness than those of the inner conductor, the limiting frequency being of equal value for both conductors, and said limiting frequency being so related to the highest working frequency of the band as to be a multiple thereof at any point within the working frequency range.

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  • Waveguide Aerials (AREA)
US397704A 1940-10-01 1941-06-12 Radio cable Expired - Lifetime US2342736A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE229288X 1940-10-01

Publications (1)

Publication Number Publication Date
US2342736A true US2342736A (en) 1944-02-29

Family

ID=5867701

Family Applications (1)

Application Number Title Priority Date Filing Date
US397704A Expired - Lifetime US2342736A (en) 1940-10-01 1941-06-12 Radio cable

Country Status (3)

Country Link
US (1) US2342736A (enrdf_load_stackoverflow)
BE (1) BE441157A (enrdf_load_stackoverflow)
CH (1) CH229288A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416561A (en) * 1943-06-29 1947-02-25 Rca Corp Combination electrical and fluid conducting cable
US2479288A (en) * 1944-03-08 1949-08-16 Allen William Douglas Flexible electromagnetic wave guide
US2511916A (en) * 1944-07-06 1950-06-20 Wave guide for high-frequency electric currents
US2731510A (en) * 1950-08-29 1956-01-17 British Insulated Callenders Overhead electric lines and conductors therefor
US2736866A (en) * 1950-03-27 1956-02-28 Int Standard Electric Corp Filter for transmission line
US4779064A (en) * 1987-04-01 1988-10-18 Raytheon Company Radio frequency coaxial cable
US5298682A (en) * 1992-08-20 1994-03-29 Wireworld By David Salz, Inc. Optimized symmetrical coaxial cable
US5374782A (en) * 1993-07-01 1994-12-20 Taylor; John A. Stranded annular conductors
US6583360B1 (en) 2002-02-08 2003-06-24 Igor Yudashkin Coaxial audio cable assembly
US20090314510A1 (en) * 2008-01-11 2009-12-24 Kukowski Thomas R Elastomeric Conductors and Shields
US12224088B2 (en) * 2019-05-15 2025-02-11 Leoni Kabel Gmbh Coax cable for inductive charging

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416561A (en) * 1943-06-29 1947-02-25 Rca Corp Combination electrical and fluid conducting cable
US2479288A (en) * 1944-03-08 1949-08-16 Allen William Douglas Flexible electromagnetic wave guide
US2511916A (en) * 1944-07-06 1950-06-20 Wave guide for high-frequency electric currents
US2736866A (en) * 1950-03-27 1956-02-28 Int Standard Electric Corp Filter for transmission line
US2731510A (en) * 1950-08-29 1956-01-17 British Insulated Callenders Overhead electric lines and conductors therefor
US4779064A (en) * 1987-04-01 1988-10-18 Raytheon Company Radio frequency coaxial cable
US5298682A (en) * 1992-08-20 1994-03-29 Wireworld By David Salz, Inc. Optimized symmetrical coaxial cable
US5374782A (en) * 1993-07-01 1994-12-20 Taylor; John A. Stranded annular conductors
US6583360B1 (en) 2002-02-08 2003-06-24 Igor Yudashkin Coaxial audio cable assembly
US20090314510A1 (en) * 2008-01-11 2009-12-24 Kukowski Thomas R Elastomeric Conductors and Shields
US12224088B2 (en) * 2019-05-15 2025-02-11 Leoni Kabel Gmbh Coax cable for inductive charging

Also Published As

Publication number Publication date
BE441157A (enrdf_load_stackoverflow)
CH229288A (de) 1943-10-15

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