FR2428355A1 - ANTENNA INSTALLATION - Google Patents

ANTENNA INSTALLATION

Info

Publication number
FR2428355A1
FR2428355A1 FR7914402A FR7914402A FR2428355A1 FR 2428355 A1 FR2428355 A1 FR 2428355A1 FR 7914402 A FR7914402 A FR 7914402A FR 7914402 A FR7914402 A FR 7914402A FR 2428355 A1 FR2428355 A1 FR 2428355A1
Authority
FR
France
Prior art keywords
antenna
fire
supports
antenna installation
wires
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.)
Withdrawn
Application number
FR7914402A
Other languages
French (fr)
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of FR2428355A1 publication Critical patent/FR2428355A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna

Landscapes

  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

An antenna system is specified for radio supply of railway and road tunnels, mining sites and the like, in the case of which system two conductive wires (D1, D2) are held parallel by supports (ST1, ST2), these wires being prestressed and the supports consisting of a fire-resistant insulating material. This antenna, which is fitted in the tunnel longitudinal direction, is cost-effective and remains functionally reliable even in the event of fire breaking out.
FR7914402A 1978-06-06 1979-06-06 ANTENNA INSTALLATION Withdrawn FR2428355A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH616278A CH627879A5 (en) 1978-06-06 1978-06-06 Antenna system

Publications (1)

Publication Number Publication Date
FR2428355A1 true FR2428355A1 (en) 1980-01-04

Family

ID=4305240

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7914402A Withdrawn FR2428355A1 (en) 1978-06-06 1979-06-06 ANTENNA INSTALLATION

Country Status (4)

Country Link
CH (1) CH627879A5 (en)
DE (1) DE2922261A1 (en)
FR (1) FR2428355A1 (en)
IT (1) IT1121255B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478133A (en) * 1946-07-31 1949-08-02 John P Shanklin Propagation of radio waves through a tunnel
US3534303A (en) * 1967-04-20 1970-10-13 Theodore Hafner Surface wave transmission
GB1541278A (en) * 1975-10-07 1979-02-28 Iniex Comounication system particularly suitable for establishing radioelectric communication in tunnels and along linear paths above the ground

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478133A (en) * 1946-07-31 1949-08-02 John P Shanklin Propagation of radio waves through a tunnel
US3534303A (en) * 1967-04-20 1970-10-13 Theodore Hafner Surface wave transmission
GB1541278A (en) * 1975-10-07 1979-02-28 Iniex Comounication system particularly suitable for establishing radioelectric communication in tunnels and along linear paths above the ground

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/70 *

Also Published As

Publication number Publication date
CH627879A5 (en) 1982-01-29
IT1121255B (en) 1986-04-02
IT7923276A0 (en) 1979-06-05
DE2922261A1 (en) 1979-12-13

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Legal Events

Date Code Title Description
ST Notification of lapse