FR2225817A1 - Multiply-screened coaxial cable has distributed inter-screen impedance - forming lumped series chain with lumped transfer imped as parallel branches - Google Patents

Multiply-screened coaxial cable has distributed inter-screen impedance - forming lumped series chain with lumped transfer imped as parallel branches

Info

Publication number
FR2225817A1
FR2225817A1 FR7313515A FR7313515A FR2225817A1 FR 2225817 A1 FR2225817 A1 FR 2225817A1 FR 7313515 A FR7313515 A FR 7313515A FR 7313515 A FR7313515 A FR 7313515A FR 2225817 A1 FR2225817 A1 FR 2225817A1
Authority
FR
France
Prior art keywords
lumped
multiply
coaxial cable
imped
parallel branches
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.)
Granted
Application number
FR7313515A
Other languages
French (fr)
Other versions
FR2225817B1 (en
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.)
FILECA
Original Assignee
FILECA
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 FILECA filed Critical FILECA
Priority to FR7313515A priority Critical patent/FR2225817A1/en
Publication of FR2225817A1 publication Critical patent/FR2225817A1/en
Application granted granted Critical
Publication of FR2225817B1 publication Critical patent/FR2225817B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Communication Cables (AREA)

Abstract

The multiply-screened coaxial cable has a central line (C) for signal transmission and n outer screening sleeves (Bn). The characteristic impedance (Z12) between the first (B1) and the second screen (B2) is effectively in series with the characteristic impedances between other adjacent screens (Z23 to Z(n-1)n). These series impedances are coupled to parallel transfer impedance ZTn representing in lumped form the cable's distributed transfer impedance (i.e. a function of length). Each screening sleeve is constructed from two layers connected together electrically by an intermediate layer of a magnetic metal having a high SIGMA. MU. f. product, where SIGMA is the conductivity MU the permeability and f the frequency.
FR7313515A 1973-04-13 1973-04-13 Multiply-screened coaxial cable has distributed inter-screen impedance - forming lumped series chain with lumped transfer imped as parallel branches Granted FR2225817A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7313515A FR2225817A1 (en) 1973-04-13 1973-04-13 Multiply-screened coaxial cable has distributed inter-screen impedance - forming lumped series chain with lumped transfer imped as parallel branches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7313515A FR2225817A1 (en) 1973-04-13 1973-04-13 Multiply-screened coaxial cable has distributed inter-screen impedance - forming lumped series chain with lumped transfer imped as parallel branches

Publications (2)

Publication Number Publication Date
FR2225817A1 true FR2225817A1 (en) 1974-11-08
FR2225817B1 FR2225817B1 (en) 1977-08-19

Family

ID=9117957

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7313515A Granted FR2225817A1 (en) 1973-04-13 1973-04-13 Multiply-screened coaxial cable has distributed inter-screen impedance - forming lumped series chain with lumped transfer imped as parallel branches

Country Status (1)

Country Link
FR (1) FR2225817A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404288A1 (en) * 1977-09-27 1979-04-20 Fileca Sheathing system for HF electrical cable - has absorbing layer between conducting structures providing attenuation of at least 6 dB
FR2461342A1 (en) * 1979-07-06 1981-01-30 Mayer Ferdy HIGH IMMUNITY CABLES, AGAINST ELECTROMAGNETIC PULSE (EMP)
EP0170159A2 (en) * 1984-07-30 1986-02-05 Siemens Aktiengesellschaft Triple conductor concentric cable

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404288A1 (en) * 1977-09-27 1979-04-20 Fileca Sheathing system for HF electrical cable - has absorbing layer between conducting structures providing attenuation of at least 6 dB
FR2461342A1 (en) * 1979-07-06 1981-01-30 Mayer Ferdy HIGH IMMUNITY CABLES, AGAINST ELECTROMAGNETIC PULSE (EMP)
EP0170159A2 (en) * 1984-07-30 1986-02-05 Siemens Aktiengesellschaft Triple conductor concentric cable
EP0170159A3 (en) * 1984-07-30 1987-10-07 Siemens Aktiengesellschaft Triple conductor concentric cable

Also Published As

Publication number Publication date
FR2225817B1 (en) 1977-08-19

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Legal Events

Date Code Title Description
ST Notification of lapse