Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
  • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
  • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
  • H01R24/42—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches
  • H01R24/48—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches comprising protection devices, e.g. overvoltage protection
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
  • H01R13/6461—Means for preventing cross-talk
• • 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
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
  • H01T4/00—Overvoltage arresters using spark gaps
  • H01T4/08—Overvoltage arresters using spark gaps structurally associated with protected apparatus
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R2103/00—Two poles

Definitions

• the invention relates to a noise protection filter and lightning current arrester device in a coaxial line for transmitting high-frequency signals, comprising a housing with two connectors, the housing forming an outer conductor connected to ground, an inner conductor guided through the housing and a short-circuit connection between the inner conductor and the housing.
• Noise filter and lightning arrester devices of this type are known. They are used to assemble assemblies, devices or systems that are connected to cables, e.g. To protect coaxial lines of telecommunication devices against electromagnetic impulses, overvoltages and / or lightning currents. Artificial electromagnetic pulses can be generated, for example, by motors, switches, clocked power supplies or also in connection with nuclear events, and pulses of natural origin can arise, for example, as a result of direct or indirect lightning strikes.
• the known protective circuits are arranged on the input side of the assemblies, devices or systems, which can be dissipative or reflective systems.
• EMP arrester of this type is known from EP 938 166.
• This EMP arrester has a housing which serves as an outer conductor and is connected to the ground.
• An inner conductor is guided in a first part of this housing, which runs in the direction of the insertion axis of a coaxial cable.
• a ⁇ / 4 short-circuit conductor is arranged in a second housing part, which projects at a right angle from the first housing part, and connects the inner conductor to the housing. binds.
• arresters of this type have the disadvantage that a residual pulse and thus also a residual energy is released via the inner conductor to the connected assemblies, devices or systems.
• Another disadvantage is that the housing part, which is arranged at right angles to the inner conductor and which receives the ⁇ / 4 arrester, is relatively large and leads to a bulky size of these arresters.
• the installation of such arresters often presents considerable difficulties due to the ⁇ / 4 component protruding at right angles, and corresponding distances between adjacent components must also be maintained.
• This type of construction can also not be covered with a shrink tube against environmental influences, but is wrapped in practice with corrosion protection tapes. This causes higher costs.
• the longitudinal axis of the inner conductor and the longitudinal axis of the short-circuit connection between the inner conductor and the housing are arranged approximately parallel to one another.
• the longitudinal axes of the inner conductor and the short-circuit connection run approximately parallel to the longitudinal axis of the device or the housing.
• All essential Components of the device are arranged around the longitudinal axis of the housing in such a way that the housing can be formed concentrically to the longitudinal axis. This arrangement leads to a compact cylindrical configuration of the device, in which the input and output for the cables or the corresponding connectors lie on the same axis and this coincides with the longitudinal axis of the device.
• each short-circuit line has a capacitance and an inductance, which act in parallel. This configuration results in a broadband range of action for the device, for example for high-frequency signals in the range from 1.7 to 2.5 GHz.
• the solution according to the invention enables the installation of additional pulse-diverting elements between the mutually directed ends of the short-circuit lines and the housing.
• Gas discharge arresters or varistors or diodes for example, can be used as additional pulse-diverting elements, these elements being decoupled in the operating frequency range of the device.
• This arrangement enables the transmission of supply voltages.
• the device can thus also be used for RF decoupling of corresponding additional pulse-diverting elements without the intermodulation behavior being impaired.
• FIG. 1 shows a longitudinal section through a device according to the invention
• FIG. 2 shows a cross section along the line I-I in FIG. 1
• FIG. 3 shows a cross section along the line II-II in FIG. 1
• FIG. 4 shows an equivalent circuit diagram for the device according to FIG. 1
• FIG. 5 shows an equivalent circuit diagram for a device according to FIG. 1 with an additional high-pass filter
• FIG. 6 shows an equivalent circuit diagram for a device according to FIG. 1 with an additional high-pass filter and an additional diverting element and a DC feed
• Fig. 1 shows a longitudinal section through an interference filter and lightning current arrester device 1 according to the invention with connectors 7, 8 on both sides for coaxial cables.
• the coaxial cable is not shown and is used, for example, as a connection between an antenna and a transceiver with corresponding devices.
• the connectors 7, 8 are known, partially standardized components and have both on the input side 19 and on the output side 18 connecting elements, on the one hand the inner conductor of the cable via elements 21 to the inner conductor 3 of the device 1 and on the other hand the outer conductor of the cable to be connected to the housing 2 via a mechanical connection 22.
• the housing 2 forms the outer conductor 4 of the device 1.
• the connecting elements 21 are both arranged on the longitudinal axis 9 of the device 1 or of the housing 2 and are supported in the housing 2 by means of insulator disks 23.
• An inner part 24 of the connecting elements 21 is electrically conductive, for example by screwing, soldering or crimping, each with a washer 25, 26.
• These disks 25, 26 are formed from an electrically conductive material, in particular metal, for example from brass. These two disks 25, 26 are arranged at a distance from one another in the direction of the longitudinal axis 9 of the housing 2 and form connecting points 12, 13 between the inner conductor 3 and two short-circuit conductors 5, 6.
• the inner conductor 3 is parallel to the longitudinal axis 9 of the housing 2 and at a distance arranged to this.
• the entire inner conductor of the device 1 consists of the connecting elements 21, parts of the disks 25 and 26, and the inner conductor 3.
• the inner conductor has different geometric deviations over its length, as a result of which different reactance values, inductances and capacitances are formed. the.
• the two short-circuit conductors 5, 6 are also arranged approximately parallel to and at a distance from the longitudinal axis 9 of the housing 2.
• the outer ends 10, 11 of these two short-circuit conductors 5, 6 are connected to the inner conductor 3 and to connecting elements 21 via the disks 25, 26.
• the inner ends 14, 15 of the two short-circuit conductors 5, 6 are directed towards one another and are connected to the housing 2 in an electrically conductive manner via a contact part 16.
• the two short-circuit conductors 5 and 6 and the contact part 16 are formed in one piece.
• the two short-circuit conductors 5, 6 and the associated Parts of the disks 25, 26 form the short-circuit connection between the inner conductor 3 and the housing 2.
• the frequency range and the bandwidth to the desired application range of the device can be determined by adapting the geometric dimensions of these elements and the choice of the dielectric 20 become.
• the inner conductor 3 and the short-circuit conductor 5, 6 are at least partially surrounded by an insulation body 27. Air is present as a dielectric in partial areas between the housing 2 and the inner conductor 3, or the short-circuit conductors 5, 6 and the disks 25, 26.
• the housing 2 is equipped with a flange 28 and a screw connection 29 so that it can be inserted and fastened, for example, through a bushing in an electrically conductive device wall. The impulses are then diverted via this electrically conductive device wall against equipotential bonding.
• FIG. 2 shows a cross section through the device 1 along the line I-I in FIG. 1.
• the disc 26 can be seen in which the inner part 24 of the connecting element 21 is inserted centrally and connected to it. Moved outwards, the outer end 11 of the short-circuit conductor 6 and the region 13 of the inner conductor 3 are also connected to the disk 26.
• the disk 26 is surrounded concentrically by the housing 2 and between the disk 26 and the housing 2 there is the dielectric 20, air in this area.
• FIG. 3 shows a further cross section through the device 1, specifically along the line II-II in FIG. 1.
• the inner conductor 3 and the short-circuit conductor 6 can be seen, which run approximately parallel to one another and parallel to the longitudinal axis 9.
• Both the inner conductor 3 and the short-circuit conductor 5, 6 are embedded in the dielectric 20, which is formed in this area by the insulation body 27 and is made, for example, of the material Teflon.
• the interference protection filter and lightning current arrester device as shown and described as an example in FIGS. 1-3, has compact and minimal structural dimensions. It enables a high packing density the lines, and no protruding components are necessary.
• the housing 2 and thus the entire device 1 can be cylindrical and can therefore be inserted into round bores, and no orientation of the position has to be taken into account.
• Adjacent cable entries can be arranged close together without elements of the individual devices 1 interfering with one another or without damage. This design can be easily protected against environmental influences with a shrink tube.
• the device 1 according to the invention has significantly reduced residual pulses and residual energies.
• the noise protection filter and lightning current arrester device 1 shown as an example is subjected to a standardized surge current with a waveform of 8/20 ⁇ s, a voltage residual pulse of approximately 16 V and approx. 13 ⁇ J remains at 25 kA. If a conventional device with a right-angled ⁇ / 4 short-circuit conductor for the same frequency band is subjected to the same test, this conventional device has a residual voltage pulse of 70 V and approx. 430 ⁇ J at 25 kA.
• the device 1 according to the invention and shown as an example is designed broadband for a frequency range from 1.7 to 2.5 GHz. This broadband design can be used in the entire application range from approximately 400 MHz to the upper cut-off frequency of the connector.
• the outer diameter of the housing 2 of the example shown with these connectors is 29 mm and the total length of the device 1 via these connecting elements 21 is approximately 72 mm.
• the dimensions change accordingly.
• FIG. 4 shows an equivalent circuit diagram of the radio-frequency device 1 according to FIG. 1.
• the inner conductor 3 and the outer conductor 4 extend between the input side 19 and the output side 18.
• the input or output side 19, 18 is defined in accordance with the direction of the pulse , ie the input side 19 is directed, for example, against the antenna and the output side 18 against the device to be protected.
• the main path formed by the inner conductor 3 comprises a capacitance 30, an inductance 32, a capacitance 34, a Inductance 33 and a further capacitance 31. These have different reactance values.
• the short-circuit conductors 5, 6 are each represented in the equivalent circuit diagram by an inductor 35 and a capacitor 36 connected in parallel.
• the outer conductor 4 or the housing 2 is grounded.
• FIG. 5 shows the same equivalent circuit diagram as in FIG. 4, but a capacitance 37 is additionally formed in front of the output 18 of the main strand or the inner conductor 3.
• This capacitance 37 forms a high-pass filter in a manner known per se and serves to further reduce the residual energies.
• FIG. 6 shows an equivalent circuit diagram for a device 1 according to the invention, in which a direct current feed 38 is provided.
• this arrangement has an additional pulse-deflecting element 39 and a further capacitance 40.
• a gas discharge arrester, a varistor or a diode can be used as an additional pulse-diverting element 39.
• This dissipative element 39 is connected between the output side 14, 15 of the short-circuit conductor 5 and 6 and the outer conductor 4, or the housing 2.
• This additional arrester device 39 is decoupled in the transferable frequency range.

Landscapes

• Emergency Protection Circuit Devices (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)
• Devices For Indicating Variable Information By Combining Individual Elements (AREA)
• Elimination Of Static Electricity (AREA)
• Details Of Aerials (AREA)
• Control Of Motors That Do Not Use Commutators (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=4567459

Family Applications (1)

Country Status (10)

Families Citing this family (19)

Family Cites Families (8)

• 2001
  • 2001-10-15 AU AU2001293603A patent/AU2001293603A1/en not_active Abandoned
  • 2001-10-15 EP EP01973942A patent/EP1329005B1/fr not_active Expired - Lifetime
  • 2001-10-15 WO PCT/CH2001/000617 patent/WO2002035659A1/fr active IP Right Grant
  • 2001-10-15 DE DE50113240T patent/DE50113240D1/de not_active Expired - Fee Related
  • 2001-10-15 CA CA002426855A patent/CA2426855C/fr not_active Expired - Fee Related
  • 2001-10-15 US US10/399,187 patent/US6950294B2/en not_active Expired - Fee Related
  • 2001-10-15 ES ES01973942T patent/ES2199703T3/es not_active Expired - Lifetime
  • 2001-10-15 KR KR1020037005679A patent/KR100569637B1/ko not_active IP Right Cessation
  • 2001-10-15 AT AT01973942T patent/ATE377859T1/de not_active IP Right Cessation
  • 2001-10-15 CN CNB018180361A patent/CN1255908C/zh not_active Expired - Fee Related

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