GB1434975A - Wireless telecommunication system for use in confined spaces - Google Patents

Wireless telecommunication system for use in confined spaces

Info

Publication number
GB1434975A
GB1434975A GB3565073A GB3565073A GB1434975A GB 1434975 A GB1434975 A GB 1434975A GB 3565073 A GB3565073 A GB 3565073A GB 3565073 A GB3565073 A GB 3565073A GB 1434975 A GB1434975 A GB 1434975A
Authority
GB
United Kingdom
Prior art keywords
cavity
cable
conductors
plates
bottom part
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
Application number
GB3565073A
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.)
INIEX
Original Assignee
INIEX
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 INIEX filed Critical INIEX
Publication of GB1434975A publication Critical patent/GB1434975A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/04—Adaptation for subterranean or subaqueous use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/203—Leaky coaxial lines
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/28—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium using the near field of leaky cables, e.g. of leaky coaxial cables

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Waveguide Aerials (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Details Of Aerials (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Communication Cables (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

1434975 Aerials; radio signalling INSTITUT NATIONAL DES INDUSTRIES EXTRACTIVES 26 July 1973 [3 Aug 1972] 35650/73 Addition to 1327864 Headings H4A and H4L In a radio communications system according to the parent Specification, transverse radiating gaps are provided by cutting the carrier cable and fixing the adjacent ends at each gap by means of a two-part dielectric material case. A cavity in the case houses a plate bearing a matching impedance device, which is connected to the conductors of the cable. As described, a coaxial cable is used which comprises inner and outer conductors, insulating material between said conductors, and an insulating sheathing over said outer conductor. The case comprises a bottom part 7, Fig. 4, and a lid 8 provided with respective grooves 9 and 10 for receiving and clamping the two portions of the sheathed cable when screws inserted in holes 13 in the lid are engaged with nuts received in cavities 14 in the bottom part. Transverse holes 15 along the bottom part 7 enable the case to be suspended, for example, on a wall. The bottom part comprises a cavity 16 and a removable partition, and similar provision is made in the lid. A rectangular support 17, Fig. 5, fits into the cavity 16. It comprises on its upper part stainless steel stirrup-pieces 35 by means of which the outer conductors of the adjacent co-axial cable portions may be secured, and be connected to plates 23 on its lower part. The centre conductors of the said cable portions are secured by screws 34 in metal blocks 27 and are consequently connected to metal plates 30, Fig. 7, on the lower part of the support 17. The matching impedance device comprises an inductor 32, which is connected between eye terminals 31 extending from the plates 30, and a capacitor 25, which is connected between eye terminals 24 extending from the plates 23. The matching impedance components are contained within a cavity 18 formed in the support 17 and, after assembly, said cavity may be filled with a suitable potting material.
GB3565073A 1970-02-18 1973-07-26 Wireless telecommunication system for use in confined spaces Expired GB1434975A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE85381 1970-02-18
BE120619 1972-08-03

Publications (1)

Publication Number Publication Date
GB1434975A true GB1434975A (en) 1976-05-12

Family

ID=25647495

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3565073A Expired GB1434975A (en) 1970-02-18 1973-07-26 Wireless telecommunication system for use in confined spaces

Country Status (8)

Country Link
US (1) US3829767A (en)
JP (1) JPS49132911A (en)
BE (1) BE787158R (en)
DE (1) DE2337949C3 (en)
FR (1) FR2195126B2 (en)
GB (1) GB1434975A (en)
LU (1) LU68137A1 (en)
NL (1) NL173337C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001774A (en) * 1975-01-08 1977-01-04 Exxon Production Research Company Method of transmitting signals from a drill bit to the surface
US4023136A (en) * 1975-06-09 1977-05-10 Sperry Rand Corporation Borehole telemetry system
US4476574A (en) * 1980-09-17 1984-10-09 The United States Of America As Represented By The United States Department Of Energy Radio frequency communication system utilizing radiating transmission lines
CA1280487C (en) * 1986-11-06 1991-02-19 Senstar-Stellar Corporation Intrusion detection system
CA1280488C (en) * 1986-11-06 1991-02-19 Control Data Canada Limited Perimeter intrusion detection system with block ranging capability
DE102008063458B4 (en) * 2008-12-17 2012-03-15 Siemens Aktiengesellschaft Sheath wave barrier, magnetic resonance imaging device with standing wave barrier and use of the standing wave barrier in such a device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2082842A5 (en) * 1970-03-27 1971-12-10 Boulore Christian

Also Published As

Publication number Publication date
BE787158R (en) 1972-12-01
NL7310334A (en) 1974-02-05
JPS49132911A (en) 1974-12-20
NL173337B (en) 1983-08-01
FR2195126B2 (en) 1977-05-13
DE2337949C3 (en) 1978-11-30
LU68137A1 (en) 1973-10-16
DE2337949B2 (en) 1974-08-08
NL173337C (en) 1984-01-02
US3829767A (en) 1974-08-13
DE2337949A1 (en) 1974-02-21
FR2195126A2 (en) 1974-03-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee