DE2948953A1 - Antenna installation for road tunnel, mine shaft, etc. - has uniformly spaced insulating supports for continuous wire, with ferritic ring at each support - Google Patents
Antenna installation for road tunnel, mine shaft, etc. - has uniformly spaced insulating supports for continuous wire, with ferritic ring at each supportInfo
- Publication number
- DE2948953A1 DE2948953A1 DE19792948953 DE2948953A DE2948953A1 DE 2948953 A1 DE2948953 A1 DE 2948953A1 DE 19792948953 DE19792948953 DE 19792948953 DE 2948953 A DE2948953 A DE 2948953A DE 2948953 A1 DE2948953 A1 DE 2948953A1
- Authority
- DE
- Germany
- Prior art keywords
- ring
- rings
- tunnels
- supports
- insulating supports
- 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
Links
Classifications
-
- 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
Landscapes
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
AntennenanlageAntenna system
Zusatz zum Patent . ... ... (Aktenz.: P 29 22 261.5) Die vorliegende Erfindung betrifft eine Antennenanlage zur Funkversorgung von Tunneln, insbesondere von Bahn- und Straßentunneln, sowie Bergbaustollen, wobei gemäß dem Hauptpatent . ... ... (P 29 22 261.5) das Strahlungselement aus elektrisch leitenden Drähten besteht, die parallel gehalten und feuerfest befestigt sind. In einer vorteilhaften Ausführungsform sind zur Halterung der Drähte aus einem feuerfesten Isoliermaterial bestehende Stützen vorgesehen.Addition to the patent. ... ... (File: P 29 22 261.5) The present The invention relates to an antenna system for radio coverage in tunnels, in particular of rail and road tunnels, as well as mining tunnels, according to the main patent . ... ... (P 29 22 261.5) the radiating element made of electrically conductive wires which are held parallel and fixed in a fireproof manner. In an advantageous Embodiment are for holding the wires from a refractory insulating material existing supports provided.
Die Betriebserfahrungen mit einer solchen Anordnung haben ergeben, daß das Ubertragungsverhalten eines derartigen Strahlungselementes zufolge der kapazitiven Wirkung der Halte stützen zu einem oder mehreren Bereichen anomaler Dispersion führt, wobei dem an sich stetigen Verlauf der Dämpfungs-Frequenzkurve ein oder mehrere Bereiche unvermittelt erhöhter Dämpfung überlagert sind, die zu sehr unerwünschten Änderungen des tJbertragungsverhaltens, insbesondere zum Auftreten von Verzerrungen bei Frequenzmodulation führen.Operating experience with such an arrangement has shown that that the transmission behavior of such a radiation element according to the capacitive The effect of the stop supports leads to one or more areas of abnormal dispersion, whereby the inherently steady course of the damping frequency curve or several areas of sudden increased attenuation are superimposed on the very undesirable Changes in the transmission behavior, in particular with regard to the occurrence of distortions lead to frequency modulation.
Da besonders bei großen Tunnellängen auch die oder tragungsleitungen entsprechende Länge aufweisen und wegen der vorgegebenen mechanischen und thermischen Eigenschaften Änderungen im Material der Stützen unzulässig sind, ist es Aufgabe der vorliegenden Erfindung, diesen Ubelständen abzuhelfen und ein stetiges Ubertragungsverhalten und damit eine Verringerung oder gänzliche Ausschaltung der Verzerrungen zu bewirken.Especially in the case of long tunnels, there are also the or transmission lines Have appropriate length and because of the given mechanical and thermal Properties Changes in the material of the supports are impermissible, it is the task the present invention to remedy these inconveniences and a steady transmission behavior and thus to bring about a reduction or complete elimination of the distortions.
Diese Aufgabe wird bei einer Antennenanlage der eingangs beschriebenen Art gemäß der Erfindung in der Weise gelöst, daß jeder der das Strahlungselement bildenden elektrisch leitenden Drähte im Nahebereich der isolierenden Stützen mit je einem ihn konzentrisch umfassenden Ring aus ferritischem Material versehen ist.In the case of an antenna system, this task is described at the beginning Kind according to the invention solved in such a way that each of the radiating element forming electrically conductive wires in the vicinity of the insulating supports each is provided with a ring made of ferritic material concentrically surrounding it.
Durch die induktive Ortslast im Bereich der kapazitiv belastenden Stützen ist es - in Analogie zum Pupin-oder Krarup-Kabel - möglich, den Frequenzgang ortsabhängig zu linearisieren und die eingangs geschilderten Nachteile weitgehend aufzuheben.Due to the inductive local load in the area of the capacitively loaded It is possible - in analogy to the Pupin or Krarup cable - to support the frequency response to linearize location-dependent and largely the disadvantages outlined above to cancel.
Eine besonders vorteilhafte Ausbildung des Erfindungsgedankens besteht darin, daß die konzentrischen Ringe aus Teilstücken, vorzugsweise aus je zwei Halbringen bestehen, die auf die bereits fertiggestellte Leitung nachträglich aufzubringen sind, wodurch eine wesentliche Erleichterung des Aufbaues und der Betriebsanpassung möglich wird. Bei Verwendung von Ringen bzw. Ringsegmenten von nicht kreisförmigem Querschnitt können überdies noch Inhomogenitäten des Strahlungsfeldes durch Verdrehen um die Leiterachse ausgeglichen werden.There is a particularly advantageous embodiment of the inventive concept in that the concentric rings are made up of sections, preferably two half-rings exist to be applied subsequently to the already completed line are, whereby a substantial facilitation of the construction and the Operational adjustment becomes possible. When using rings or ring segments from Non-circular cross-section can also cause inhomogeneities in the radiation field be compensated by turning around the conductor axis.
3 Patentansprüche3 claims
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT570379A AT379470B (en) | 1979-08-24 | 1979-08-24 | ANTENNA FOR TUNELLN RADIO SUPPLY |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2948953A1 true DE2948953A1 (en) | 1981-03-26 |
DE2948953C2 DE2948953C2 (en) | 1982-10-21 |
Family
ID=3578723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19792948953 Expired DE2948953C2 (en) | 1979-08-24 | 1979-12-05 | Antenna for radio coverage in tunnels |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT379470B (en) |
CH (1) | CH655410B (en) |
DE (1) | DE2948953C2 (en) |
NL (1) | NL8004777A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB641474A (en) * | 1946-07-31 | 1950-08-16 | Bendix Aviat Corp | Propagation of radio waves through a tunnel |
GB1471885A (en) * | 1973-05-23 | 1977-04-27 | Communications Patents Ltd | Leaky cable communication systems |
DE2824993A1 (en) * | 1977-07-27 | 1979-02-01 | Siemens Ag | ARRANGEMENT FOR TRANSMISSION OF RADIO SIGNALS |
-
1979
- 1979-08-24 AT AT570379A patent/AT379470B/en not_active IP Right Cessation
- 1979-12-05 DE DE19792948953 patent/DE2948953C2/en not_active Expired
-
1980
- 1980-08-05 CH CH591680A patent/CH655410B/de unknown
- 1980-08-22 NL NL8004777A patent/NL8004777A/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB641474A (en) * | 1946-07-31 | 1950-08-16 | Bendix Aviat Corp | Propagation of radio waves through a tunnel |
GB1471885A (en) * | 1973-05-23 | 1977-04-27 | Communications Patents Ltd | Leaky cable communication systems |
DE2824993A1 (en) * | 1977-07-27 | 1979-02-01 | Siemens Ag | ARRANGEMENT FOR TRANSMISSION OF RADIO SIGNALS |
Non-Patent Citations (1)
Title |
---|
H.H. Meinke, Einführung in die Elektrotechnik höherer Frequenzen, 1. Bd. 1965, S. 117-121 * |
Also Published As
Publication number | Publication date |
---|---|
CH655410B (en) | 1986-04-15 |
ATA570379A (en) | 1985-05-15 |
DE2948953C2 (en) | 1982-10-21 |
AT379470B (en) | 1986-01-10 |
NL8004777A (en) | 1981-02-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8162 | Independent application | ||
D2 | Grant after examination | ||
8339 | Ceased/non-payment of the annual fee |