EP1405369B1 - Breitbandige blitzschutzvorrichtung - Google Patents

Breitbandige blitzschutzvorrichtung Download PDF

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Publication number
EP1405369B1
EP1405369B1 EP02738014A EP02738014A EP1405369B1 EP 1405369 B1 EP1405369 B1 EP 1405369B1 EP 02738014 A EP02738014 A EP 02738014A EP 02738014 A EP02738014 A EP 02738014A EP 1405369 B1 EP1405369 B1 EP 1405369B1
Authority
EP
European Patent Office
Prior art keywords
lightning protection
protection device
waveguide
conductor
waveguide portions
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
EP02738014A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1405369A1 (de
Inventor
Ludwig Moll
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.)
Rohde and Schwarz GmbH and Co KG
Original Assignee
Rohde and Schwarz GmbH and Co KG
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 Rohde and Schwarz GmbH and Co KG filed Critical Rohde and Schwarz GmbH and Co KG
Publication of EP1405369A1 publication Critical patent/EP1405369A1/de
Application granted granted Critical
Publication of EP1405369B1 publication Critical patent/EP1405369B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Definitions

  • the invention relates to a broadband lightning protection device for high-frequency lines.
  • Lightning protection devices for high-frequency cables are required, for example, to protect television and radio transmitters when a lightning strike into a transmission mast from damage.
  • Usual lightning protection devices are, for example, Werner Gierlach, "The DARC Antenna Book”, Chap. 9.1 "lightning protection", DARC-Verlag, 1999, ISBN 3-88692-28-3 known.
  • a problem with this is that the lightning protection is either insufficient or must be made for a change in frequency a corresponding channel tuning of the lightning protection device.
  • Broadband lightning protection devices or T-connections are e.g. from EP-A-0 978 894, US-A-3,970,969, US-A-4,542,358 and GB-A-2,189,942.
  • the invention has for its object to provide an alternative lightning protection device, which has a low broadband transmission loss and a minimum reflection factor for the Hohfrequenzsignal.
  • the object is achieved by a lightning protection device according to claim 1.
  • the characteristic impedances of the segments of the lightning protection so that a total wave resistance is formed between the terminals of the lightning protection device to the high-frequency line, which is identical to the characteristic impedance of the high-frequency line.
  • FIG. 1 shows a perspective illustration of a first exemplary embodiment of a lightning protection device 1 according to the invention.
  • the outer geometry of the lightning protection device 1 is predetermined by a substantially parallelepiped lightning protection carrier 2 on which an input terminal and an output terminal 3a and 3b are arranged on two opposite side surfaces.
  • a high-frequency line not shown, can be connected, for example, a coaxial line.
  • a housing cover 4 of the lightning protection carrier 2 is closed.
  • a plurality of screw connections are provided, which are distributed approximately uniformly over all bearing surfaces of the housing cover 4 on the lightning protection carrier 2.
  • the input and output terminals 3a and 3b When using coaxial conductors as high-frequency lines, the input and output terminals 3a and 3b have a center contact, not shown.
  • the waveguide 5 extends in two parallel to each other in the lightning protection carrier 2 incorporated shafts 6a and 6b and is by means of a solder joint 7 with the center contacts of the input and Output terminals 3a and 3b connected.
  • a stub 8 is connected to the waveguide 5.
  • the waveguide 5 and the stub conductor 8 are preferably formed in one piece.
  • a bore 10 is introduced into the waveguide 5, which is the receptacle of a pin of an insulating Spacer 11 is used.
  • the spacer 11 is arranged between the waveguide 5 and a separating web 12 and, for example, made of Teflon.
  • the separating web 12 separates the two shafts 6a and 6b from each other and is formed by working the shafts 6a and 6b in the lightning protection carrier 2.
  • the waveguide 5 has two waveguide sub-sections 13a and 13b, which are arranged symmetrically in the lightning protection carrier 2 and together form a U-shaped geometry.
  • the two shafts 6a and 6b are closed at a first end face 14 of the lightning protection body 2.
  • the two shafts 6a and 6b are open.
  • the second end face 15 facing the end of the divider 12 is spaced from the second end face 15, so that there is a connection shaft with mounted housing cover 4 between the front end of the divider 12 and the housing cover 4, the width of the width of the two shafts 6a and 6b equivalent.
  • the waveguide 5 is symmetrically arranged in the thus also U-shaped shaft, consisting of the two parallel shafts 6a and 6b and their connection shaft.
  • the boundary surfaces of the lightning protection carrier 2 made of a conductive material are at ground potential and are connected via the terminals 3a and 3b to the shield of the high frequency line designed as a coaxial line.
  • the waveguide 5 thus forms together with the boundary surfaces of the shafts 6a and 6b and the front end of the divider 12 on the one hand and the housing cover 4 on the other hand, a triplate line.
  • the waveguide 5 has a constant over its entire length of material thickness d and can thus be made of a metal sheet of appropriate thickness by punching or cutting and subsequent bending.
  • the lightning protection device 1 is shown in a frontal view. This shows a recess 16, through which a further shaft 17, open from the side opposite the parallel shafts 6a and 6b, is inserted into the lightning protection carrier 2.
  • the stub conductor 8 running in this further shaft 17 extends from the connection point 9 to the middle of the further shaft 17 along the center axis 18 of the lightning protection device 1 and from there to its end parallel to the waveguide sub-sections 13a and 13b, as shown in FIG , When mounted housing cover 4, the stub 8 also forms a triplate line.
  • FIG. 4 shows a further side view, which is rotated by 180 ° about the longitudinal axis of the lightning protection device 1 with respect to the first side view from FIG. 2.
  • the stub conductor 8 runs along a central axis 23 of the lightning protection device 1 in the further shaft 17.
  • the further shaft 17 is closed at its end remote from the connection point 9 to the end face 14 of the lightning protection device 1.
  • a plateau 20 is machined on its closed side, in which a corresponding with the width of the stub 8 groove 21 is introduced.
  • the height of the plateau 20 is dimensioned so that the stub 8 by means of a clamping web, not shown, which is to be fastened in the plateau 20 threaded holes 22 to connect to the lightning protection carrier 2.
  • the thickness expansion of the stub conductor 8 is identical to the material thickness d of the waveguide 5, so that waveguide 5 and stub 8 in a common process can be made.
  • the dimensioning of the width and length of the waveguide 5 and the stub conductor 8 at a specified thickness d is such that the characteristic impedance of the waveguide section 13a is equal to the characteristic impedance of the waveguide section 13b.
  • the two characteristic impedances of the waveguide sub-sections 13a and 13b are lower than the characteristic impedance of the high-frequency line to be connected.
  • the characteristic impedances of the waveguide sub-sections 13a and 13b are e.g. about 45 ⁇ .
  • the characteristic impedance of the stub conductor 8 is significantly increased compared to the characteristic impedance of the high-frequency line, in the numerical example given about 95 ⁇ .
  • This combination results in a characteristic impedance of 50 ⁇ for the entire lightning protection device for the frequency range from 470 MHz to 862 MHz.
  • An RF signal transported via the high-frequency line thus "sees" the lightning protection device 1 as a continuous high-frequency line section with a characteristic impedance of 50 ohms.
  • the waveguide 5 ' in turn consists of two waveguide sub-sections 13a' and 13b ', which are arranged in two shafts 6a' and 6b '.
  • the junction 9 ' branches the stub 8' from.
  • the two waveguide sub-sections 13a 'and 13b' and the Sting conductor 8 ' are arranged in a section a parallel to each other.
  • the stub conductor 8 ' is curved at its end facing away from the connection point 9'. The end is fixed in a groove 21 'by clamping.
  • the stub 8 ' is disposed in the further shaft 17'.
  • the geometry of the shafts 6a 'and 6b' is selected so that the waveguide 5 'can be arranged therein so that there is a constant spacing between the waveguide 5' and the shaft walls. With the exception of the area of the threaded bores, the distance on both sides of the stub conductor 8 'to the shaft walls 16' of the further shaft 17 'is also constant and the same on both sides.
  • the two waveguide sub-sections 13a 'and 13b' each extend along a circular arc, the centers of the two circular arcs Ma and Mb being offset from the center line 23 '.
  • the two waveguide sub-sections 13a' and 13b ' are thereby interconnected by a short straight piece of the waveguide 5'.
  • the course from the terminal sides 24a and 24b to the section a also follows a circular arc.
  • Fig. 6 a further embodiment is shown, wherein the waveguide 5 'with the waveguide 5' of FIG. 5 is identical. However, the stub conductor 8 "extends along a center line 23" with respect to which the waveguide is symmetrical.

Landscapes

  • Details Of Aerials (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP02738014A 2001-07-10 2002-04-30 Breitbandige blitzschutzvorrichtung Expired - Lifetime EP1405369B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10133359 2001-07-10
DE2001133359 DE10133359A1 (de) 2001-07-10 2001-07-10 Breitbandige Blitzschutzvorrichtung
PCT/EP2002/004761 WO2003007424A1 (de) 2001-07-10 2002-04-30 Breitbandige blitzschutzvorrichtung

Publications (2)

Publication Number Publication Date
EP1405369A1 EP1405369A1 (de) 2004-04-07
EP1405369B1 true EP1405369B1 (de) 2006-05-31

Family

ID=7691192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02738014A Expired - Lifetime EP1405369B1 (de) 2001-07-10 2002-04-30 Breitbandige blitzschutzvorrichtung

Country Status (4)

Country Link
EP (1) EP1405369B1 (ja)
JP (1) JP3960970B2 (ja)
DE (2) DE10133359A1 (ja)
WO (1) WO2003007424A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117810693A (zh) * 2024-03-01 2024-04-02 成都信息工程大学 一种基于波导的新型天馈线直击雷/感应雷防护装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970969A (en) * 1973-12-18 1976-07-20 Les Cables De Lyon Device for the electrical protection of a coaxial cable by two connected circuits
US4542358A (en) * 1982-01-05 1985-09-17 Societe Anonyme Dite: Les Cables De Lyon Device protecting a coaxial cable against high-powered, low-frequency spurious pulses
GB2189942A (en) * 1986-04-30 1987-11-04 Philips Electronic Associated Transmission-line bias T

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571550B1 (fr) * 1984-10-08 1987-12-11 Teleinformatique Communic Et Dispositif de protection pour ligne coaxiale
IL106274A (en) * 1993-07-08 1999-09-22 Israel State Lightning protection for antenna system
CH689907A5 (de) * 1994-12-01 2000-01-14 Huber+Suhner Ag Anordnung in einer Koaxialantennenleitung zum Schutz gegen Ueberspannung mit Koppler.
DE19520974A1 (de) * 1995-06-08 1996-12-12 Spinner Gmbh Elektrotech Überspannungsschutz für HF-Leitungen
US5771026A (en) * 1996-03-28 1998-06-23 Sti-Co Industries, Inc. Disguised broadband antenna system for vehicles
EP0978894B1 (de) * 1998-08-06 2004-11-17 Spinner GmbH Elektrotechnische Fabrik Breitbandiger koaxialer Überspannungsableiter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970969A (en) * 1973-12-18 1976-07-20 Les Cables De Lyon Device for the electrical protection of a coaxial cable by two connected circuits
US4542358A (en) * 1982-01-05 1985-09-17 Societe Anonyme Dite: Les Cables De Lyon Device protecting a coaxial cable against high-powered, low-frequency spurious pulses
GB2189942A (en) * 1986-04-30 1987-11-04 Philips Electronic Associated Transmission-line bias T

Also Published As

Publication number Publication date
EP1405369A1 (de) 2004-04-07
DE50207019D1 (de) 2006-07-06
DE10133359A1 (de) 2003-01-23
WO2003007424A1 (de) 2003-01-23
JP2004535132A (ja) 2004-11-18
JP3960970B2 (ja) 2007-08-15

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