EP1405369A1 - Dispositif parafoudre a large bande - Google Patents

Dispositif parafoudre a large bande

Info

Publication number
EP1405369A1
EP1405369A1 EP02738014A EP02738014A EP1405369A1 EP 1405369 A1 EP1405369 A1 EP 1405369A1 EP 02738014 A EP02738014 A EP 02738014A EP 02738014 A EP02738014 A EP 02738014A EP 1405369 A1 EP1405369 A1 EP 1405369A1
Authority
EP
European Patent Office
Prior art keywords
lightning protection
protection device
waveguide
conductor
waveguide sections
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
EP02738014A
Other languages
German (de)
English (en)
Other versions
EP1405369B1 (fr
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/fr
Application granted granted Critical
Publication of EP1405369B1 publication Critical patent/EP1405369B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01Q1/50—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 lines are required, for example, to protect television and radio broadcasting systems from damage when a lightning strikes a transmission mast.
  • Usual lightning protection devices are for example from Werner Gierlach, "Das DARC antennas book”, chap. 9.1 "Blitzstoff", DARC-Verlag, 1999, ISBN 3-88692-28-3 known.
  • a problem with this is that the lightning protection is either insufficient or a corresponding channel tuning of the lightning protection device has to be carried out to change the frequency.
  • the invention has for its object to provide a lightning protection device which has a low broadband transmission loss and a minimum reflection factor for the high frequency signal.
  • the object is achieved by a lightning protection device according to claim 1.
  • the advantage of the solution according to the invention lies in the inclusion of a section of the waveguide in the lightning protection.
  • a waveguide is arranged between the connections of the supply line of the lightning protection device to the high-frequency line, which has a lower characteristic impedance than the high-frequency supply line.
  • the short-circuit line designed as a stub line has a higher characteristic impedance.
  • a lightning protection device according to the invention is shown in the drawings and explained in the following description. Show it:
  • Figure 1 is a perspective view of a first embodiment of a lightning protection device according to the invention.
  • Fig. 3 shows a second, 90 ° rotated side view of the first embodiment of the invention
  • FIG. 4 shows an illustration of an end face of the first exemplary embodiment of the lightning protection device according to the invention with the housing cover removed; 5 shows a second exemplary embodiment with a waveguide and stub arranged in one plane; and
  • Fig. 6 shows a third embodiment with the waveguide and stub arranged in one plane.
  • FIG. 1 shows a perspective view 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 an essentially cuboid lightning protection support 2, on which an input and an output connection 3a and 3b are arranged on two opposite side surfaces.
  • a high-frequency line (not shown), for example a coaxial line, can be connected to the input and output terminals 3a and 3b.
  • the lightning protection support 2 is closed by means of a housing cover 4. To fasten the housing cover 4, a plurality of screw connections are provided, which are distributed approximately uniformly over all contact surfaces of the housing cover 4 on the lightning protection support 2.
  • the input and output connections 3a and 3b When using coaxial conductors as high-frequency lines, the input and output connections 3a and 3b have a center contact (not shown). The connection of the two center contacts of the input and output connections 3a and 3b takes place via a waveguide 5.
  • the waveguide 5 runs in two shafts 6a and 6b machined parallel to one another in the lightning protection carrier 2 and is connected to the center contacts of the input and Output terminals 3a and 3b connected.
  • a stub 8 is connected to the waveguide 5 in the middle between the two connections 3a and 3b.
  • the waveguide 5 and the stub 8 are preferably formed in one piece.
  • a bore 10 is made in the waveguide 5, which accommodates a pin of an insulating one Spacer 11 is used.
  • the spacer 11 is arranged between the waveguide 5 and a separating web 12 and is made, for example, of Teflon.
  • the separating web 12 separates the two shafts 6a and 6b from one another and is formed in the lightning protection carrier 2 by working out the shafts 6a and 6b.
  • the waveguide 5 has two waveguide 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 on a first end face 14 of the lightning protection element 2.
  • the two shafts 6a and 6b are open towards the opposite second end face 15.
  • the end of the separating web 12 facing the second end 15 is spaced from the second end 15, so that when the housing cover 4 is mounted, a connecting shaft results between the front end of the separating web 12 and the housing cover 4, the width of which corresponds to the width of the two shafts 6a and 6b equivalent.
  • the waveguide 5 is arranged symmetrically in the thus also U-shaped shaft, consisting of the two parallel shafts 6a and 6b and their connecting shaft.
  • the boundary surfaces of the lightning protection carrier 2 made of a conductive material are at ground potential and are connected via the connections 3a and 3b to the shielding of the high-frequency line designed as a coaxial line.
  • the waveguide 5 thus forms a triplate line together with the boundary surfaces of the shafts 6a and 6b and the front end of the separating web 12 on the one hand and the housing cover 4 on the other hand.
  • the waveguide 5 has a material thickness d that is constant over its entire length and can thus be produced from a sheet of metal of corresponding thickness by punching or cutting and subsequent bending.
  • the lightning protection device 1 is shown in an end view in FIG. 3.
  • a recess 16 is shown therein, through which a further shaft 17, which is open from the side opposite the parallel shafts 6a and 6b, is introduced into the lightning protection carrier 2.
  • the branch conductor 8 running in this further shaft 17 extends from the connection point 9 to the center of the further shaft 17 along the central axis 18 of the lightning protection device 1 and from there to its end parallel to the waveguide sections 13a and 13b, as shown in FIG. 4 , When the housing cover 4 is in place, the stub 8 also forms a triplate line.
  • a further web 19 is formed between the parallel shafts 6a and 6b and the further shaft 17, which is also parallel in its longitudinal extent.
  • 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 branch 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 facing away from the connection point 9 to the front side 14 of the lightning protection device 1.
  • a plateau 20 is worked out on its closed side, into which a groove 21 corresponding to the width of the stub conductor 8 is made.
  • the height of the plateau 20 is dimensioned such that the spur conductor 8 is connected to the lightning protection support 2 by means of a clamping web (not shown) which is to be fastened via threaded holes 22 incorporated in the plateau 20.
  • the thickness of the stub 8 is identical to the material thickness d of the waveguide 5, so that the waveguide 5 and stub 8 in a common process can be manufactured.
  • the advantage of the one-piece conductor, ie waveguide 5 and spur conductor 8, is that there are no contact resistances at the connection point 9.
  • the dimensioning of the width and length of the waveguide 5 and the stub 8 with a defined material thickness d is such that the wave resistance of the waveguide section 13a is equal to the wave resistance of the waveguide section 13b.
  • the two wave resistances of the waveguide sections 13a and 13b are lower than the wave resistance of the high-frequency line to be connected.
  • the characteristic impedances of the waveguide sections 13a and 13b are e.g. approx. 45 ⁇ .
  • the wave resistance of the stub 8 is, however, significantly increased compared to the wave resistance of the radio frequency line, in the given numerical example about 95 ⁇ . This combination results in a wave resistance 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 "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 sections 13a 'and 13b 1 which in two
  • the branch conductor 8 ' branches off from connection point 9'.
  • the spur 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 branch conductor 8 ' is arranged in the further shaft 17'. Between the shafts 6a 1 and 17 ', and the shafts 17' and 6b ', webs 19' are formed which are provided with threaded bores for receiving screws for fastening a housing cover (not shown).
  • the geometry of the shafts 6a 'and 6b' is chosen so that the waveguide 5 'can be arranged in such a way that there is a constant distance 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 branch conductor 8 'to the shaft walls 16' of the further shaft 17 'is also constant and the same size on both sides.
  • the two waveguide sections 13a 'and 13b' each run along an arc, the centers of the two arcs Ma and Mb being offset from the center line 23 '.
  • the two waveguide sections 13a' and 13b ' are thereby connected to one another by a short straight piece of the waveguide 5'.
  • the course from the connection sides 24a and 24b to section a likewise follows an arc.
  • the waveguide 5 ' being identical to the waveguide 5' of FIG. 5.
  • the stub 8 ' 1 runs along a center line 23''with respect to which the waveguide is symmetrical.

Landscapes

  • Details Of Aerials (AREA)

Abstract

L'invention concerne un dispositif parafoudre destiné à des lignes à haute fréquence présentant une impédance caractéristique définie. Ce dispositif parafoudre (1) se compose d'un guide d'ondes (5) disposé dans un support parafoudre (2) et d'un conducteur de branchement (8) partant dudit guide d'ondes, l'extrémité de ce conducteur opposée au point de jonction (9) avec le guide d'ondes (5) étant raccordée à un potentiel de masse. Le guide d'ondes (5) du dispositif parafoudre (1) est constitué de deux sections (13a, 13b) dont l'impédance caractéristique est inférieure à celle de la ligne à haute fréquence raccordée. En revanche, l'impédance caractéristique du conducteur de branchement (8) est supérieure à celle de la ligne à haute fréquence raccordée.
EP02738014A 2001-07-10 2002-04-30 Dispositif parafoudre a large bande Expired - Lifetime EP1405369B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2001133359 DE10133359A1 (de) 2001-07-10 2001-07-10 Breitbandige Blitzschutzvorrichtung
DE10133359 2001-07-10
PCT/EP2002/004761 WO2003007424A1 (fr) 2001-07-10 2002-04-30 Dispositif parafoudre a large bande

Publications (2)

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

Family

ID=7691192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02738014A Expired - Lifetime EP1405369B1 (fr) 2001-07-10 2002-04-30 Dispositif parafoudre a large bande

Country Status (4)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117810693B (zh) * 2024-03-01 2024-10-01 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

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254864B1 (fr) * 1973-12-18 1976-10-08 Cables De Lyon Geoffroy Delore
FR2519474B1 (fr) * 1982-01-05 1985-09-20 Cables De Lyon Geoffroy Delore Dispositif de protection d'un cable coaxial contre les impulsions parasites de basse frequence et de forte puissance
FR2571550B1 (fr) * 1984-10-08 1987-12-11 Teleinformatique Communic Et Dispositif de protection pour ligne coaxiale
GB2189942A (en) * 1986-04-30 1987-11-04 Philips Electronic Associated Transmission-line bias T
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 (fr) * 1998-08-06 2004-11-17 Spinner GmbH Elektrotechnische Fabrik Dérivateur de surtension coaxial à large bande

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03007424A1 *

Also Published As

Publication number Publication date
JP2004535132A (ja) 2004-11-18
WO2003007424A1 (fr) 2003-01-23
JP3960970B2 (ja) 2007-08-15
EP1405369B1 (fr) 2006-05-31
DE50207019D1 (de) 2006-07-06
DE10133359A1 (de) 2003-01-23

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