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
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/02—Contact members
  • H01R13/22—Contacts for co-operating by abutting
  • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
• • 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
  • H01R13/6473—Impedance matching
  • H01R13/6474—Impedance matching by variation of conductive properties, e.g. by dimension variations
• • 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
  • H01R13/02—Contact members
  • H01R13/22—Contacts for co-operating by abutting
  • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
  • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
  • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
• • 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
  • H01R24/52—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 mounted in or to a panel or structure
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R2201/00—Connectors or connections adapted for particular applications
  • H01R2201/02—Connectors or connections adapted for particular applications for antennas

Definitions

• the present invention relates to an antenna interface for a radiofrequency station.
• an antenna interface for a radio frequency station of the type comprising a base, intended to be connected to the station, and a plug, intended to be connected to the antenna, are already known.
• Such an interface is usually used for a single-band station, that is to say a station capable of transmitting and / or receiving on a single frequency band.
• the invention is intended to overcome this disadvantage, allowing the antenna connection to a dual-band station, while limiting the size of the connection means.
• the subject of the invention is in particular an antenna interface for radiofrequency station, of the type comprising a base, intended to be connected to the station, and a plug, intended to be connected to the antenna, characterized in that than :
• the base comprises a body and at least two separate coaxial cables, each having a conductive core, a conductive braid disposed coaxially with the core, and an electrical insulator disposed between the core and the braid to electrically isolate them,
• each coaxial cable extends between a first end, intended to be connected to a printed circuit of the station, and a second end, to which the braid is electrically connected to the body of the base, and to which the core is accessible. through a respective orifice formed in the body of the base,
• the plug comprises a body and at least two piston contactors, such that, when the plug and the base are connected together, each contactor is arranged opposite an orifice so that the core of a respective cable is electrically connected with this contactor, and the braid of each cable is electrically connected to the body of the plug through the body of the base,
• each piston contactor comprises a fixed part, intended to be connected to a printed circuit of the antenna, and a part movable with respect to the fixed part, comprising a contact element intended to cooperate with a respective core when the base is connected with the form, and -
• the plug has a flexible membrane, carrying the contact elements of the piston contactors.
• the interface according to the invention has two hot spots (formed by the contactors, to which the cable cores are connected), and a ground reference (formed by the body of the plug, to which the braids of the cables are connected).
• this interface makes it possible to work on two distinct frequencies, for transmitting and / or receiving the station on these two frequency bands.
• the interface according to the invention is therefore particularly suitable for the antenna connection to a dual-band station.
• the antenna connection to the dual-band station is achieved by means of a single interface.
• a single interface is less cumbersome and expensive than the two interfaces required in the state of the art.
• the invention allows the use of a single collinear antenna, which allows the transmission and / or reception of the station on the two frequency bands simultaneously, which is not possible in the state of the art.
• the use of two bases involves the use of two respective antennas, each transmitting in a frequency band, each antenna may interfere with the signal of the other antenna.
• the interface according to the invention is suitable for use in an aggressive environment, for example in a humid environment.
• the membrane provides a sealing function, including protecting connectors and cables against moisture.
• the interface according to the invention may further comprise one or more of the following characteristics, taken alone or in any technically possible combination:
• the fixed part comprises an electrically insulating hollow cylindrical element forming a piston body in which the movable part is intended to move axially, and the contact element of the movable part comprises a first guide part. , and a second contact portion intended to cooperate with a respective core when the base is connected with the plug, and the first guide portion has a generally cylindrical shape, of diameter substantially equal to an inner diameter of the hollow cylindrical member in order to cooperate without play with an inner wall of this hollow cylindrical element,
• the base comprises a bottom wall, in which the orifices are formed, the plug comprises an end stop, against which the bottom wall abuts when the base is connected with the plug, and the stop of end of race being planned so that a free space remains between the membrane and the bottom wall when the base is connected with the plug,
• each piston contactor in particular the hollow cylindrical element, is dimensioned so as to minimize crosstalk between signals passing through these piston contactors, preferably for a crosstalk of less than 45 dB,
• the base comprises a first part, preferably threaded so as to be screwed into a complementary orifice of the station or screwed to a counter-nut, and a second threaded part, intended to be screwed into a complementary housing of the plug, the first and second threaded portions being axially separated by a flange,
• the flange carries, on the side of the first part, a seal intended to cooperate with a contour of the complementary orifice of the station,
• the body of the plug has a general shape of revolution about an axis, the plug having a wheel free to rotate about the axis relative to the body, the wheel having a generally hollow cylindrical shape internally threaded, delimiting the complementary housing of the second threaded portion of the base,
• the interface comprises a seal, arranged in the housing of the wheel, between the body and the wheel,
• the base and the plug comprise complementary polarizing means for ensuring that the contactors cooperate with a respective soul when the plug and the base are connected together.
• FIG. 1 is a partial axial sectional view of an antenna interface according to an exemplary embodiment of the invention
• FIG. 2 is a perspective view of a base of the antenna interface of FIG. 1;
• FIG. 3 is an elevational view of the base of FIG. 2,
• FIG. 4 is a cross-sectional view of the base of FIG. 1,
• FIG. 5 is a perspective view of a plug of the interface of FIG. 1,
• FIG. 6 is a partial axial sectional view of the plug of FIG. 5, and
• FIG. 7 is a cross-sectional view of the plug of FIG.
• FIG. 1 shows an antenna interface 8 according to an exemplary embodiment of the invention.
• Such an interface 8 is intended in particular to equip a radio frequency station, for example a two-band tactical radio station, for connecting a two-band antenna.
• the interface 8 comprises a base 10, in particular represented in FIGS. 2 to 4, and a plug 12, in particular represented in FIGS. 5 to 7, intended to cooperate with the base 10 so as to form the interface 8 like this is shown in Figure 1.
• the base 10 comprises a body 1 1, of general shape of revolution about an axis X.
• This body 1 1 comprises a first portion 14 and a second portion 16, substantially cylindrical, and a collar 18 separating axially the first 14 and second 16 parts.
• the first portion 14 has a threaded outer surface, to be screwed into a threaded complementary orifice of the radiofrequency station (not shown).
• the flange 18 then forms in particular an end stop for this screwing.
• the threaded outer surface forms fastening means at the radiofrequency station that are particularly compact, have a reduced axial size, and are sufficiently robust.
• a seal 20, visible in Figure 3, is carried by the flange 18.
• Such a seal 20 is intended to cooperate with a contour of the complementary orifice of the station, to ensure the sealing of the post.
• the first portion 14 could include any other means of attachment to the radiofrequency station.
• this first portion 14 could be threaded only on an area to be screwed into a lock nut.
• the first portion 14 may also not be threaded, but intended to be forced into a complementary hole of the station.
• the second portion 16 also has a threaded outer surface. Preferably, this second portion 16 has a diameter greater than a diameter of the first portion 14.
• the diameter of the base 10, in particular the diameter of the flange 18, is less than 2 cm.
• the base 10 is less bulky than a base of a conventional interface.
• the second part 16 comprises an axial cavity 21 delimited axially by a bottom wall 21 A.
• the base 10 also comprises at least two separate coaxial cables 22, intended to be connected to a radio card of the station. Thus, this base allows direct mechanical interfacing with this radio card.
• each coaxial cable 22 in FIG. 1 comprises a central conductive core 22A, surrounded by an insulating electrical material 22B, itself surrounded by a conductive braid 22C, arranged coaxially to the soul.
• the braid 22C is finally wrapped with an insulating sheath
• Each cable 22 has a first end, extends axially out of the base 10, beyond the first portion 14, and having a conventional connector (not shown) intended to be connected to the radio card of the station.
• Each cable 22 also has a second end, opposite to the first, extending through the base
• each cable 22 is connected to the base 10 by means of a connection element 23, described with reference to FIG.
• the connecting element 23 comprises a first sleeve-shaped conducting portion 23A intended to cooperate with the braid 22C of a respective cable 22, this first portion 23A being housed without play in a through-hole 24 of the body 11 of the Thus, the braid 22C is electrically connected to the body 11 via this first portion 23A of the connection element 23.
• connection element 23 further includes a second conductive portion 23B, intended to cooperate with the core 22A of the corresponding cable 22.
• the core 22A is inserted into a longitudinal hole of the second portion 23B.
• the second portion 23B comprises a contact plate 25.
• connection element 23 finally comprises an electrical insulator 23C, radially interposed between the first 23A and second 23B conductive parts to electrically isolate them relative to each other.
• sealing O-rings 26A, 26B are interposed radially between the first conducting portion 23A and the insulator 23C, and between the insulator 23C and the second conducting portion 23B respectively.
• the bottom wall 21 has at least two orifices 21 B, through which the contact plates 25 are respectively accessible.
• the plug 12 shown in greater detail in FIGS. 5 to 7, also has a general shape of revolution about an axis X ', and comprises a body 27 and a wheel 28 free to rotate about the axis X' by relation to the body 27.
• the body 27 carries on its outer surface 30 connection means on an antenna, including a conventional collinear type antenna.
• connection means 30 comprise for example two pairs 31 of fastening fingers 31A, the pairs 31 being arranged diametrically opposite one another.
• the fixing fingers 31 A of each pair 31 are spaced relative to each other, in a manner adapted to receive a printed circuit of the collinear antenna between these fingers 31 A.
• the fixing fingers 31A are adapted to allow the soldering of the printed circuit on these fingers 31 A. In fact, the welding allows a robust and electrically conductive fastening.
• the fixing fingers 31 A are integral with the body 27 of the plug 12.
• these fingers 31A could be attached to the body 27, in particular in the case where the material in which the fingers 31A are realized is more suitable for welding than the material in which the body 27 is made.
• the body 27 carries an O-ring seal 29 and a collar 30.
• the body 27 is adapted to receive a sleeve of the antenna, the body 27 being fitted in this sleeve to the collar 32, the seal 29 then cooperating with the sleeve.
• the wheel 28 forms a sleeve of generally hollow cylindrical shape, delimiting a housing 33, internally threaded wall complementary to the second threaded portion 16 of the base 10.
• the connection of the base 10 with the plug 12 is realized by inserting the second threaded portion 16 in the threaded housing 33, then by rotating the wheel 28, so as to screw the wheel 28 on the second portion 16, until the bottom wall 21 A of the base 10 cooperates with a limit stop 33A provided in the housing 33.
• a seal 34 is arranged in the housing 33, between the inner wall of the housing 33 and the body 27, in order to seal the connection between the base 10 and the plug 12.
• the plug 12 also comprises at least two contactors 36, carried by the body 27 of this plug 12.
• each contactor 36 cooperates with the plate 25 connected to the core 22A of a respective cable 22, accessible through the respective opening 21 B of the bottom wall 21 A.
• the braids 22C of the cables 22 cooperate with the body 27 of the plug 12, through the body 1 1 of the base.
• the contactors 36 form two hot spots of the antenna, while the body 27 of the plug 12 forms the reference mass.
• the base 10 and the plug 12 comprise complementary polarizing means, intended to ensure that each switch 36 cooperates with the respective plate 25 when the plug 12 and the base 10 are connected together.
• the means 38 comprise a projection 40 carried by the plug 12 (visible in Figure 7), and a complementary cavity 41 formed in the bottom wall 21 of the base 10 (visible in Figure 4).
• the projection 40 is protected by the wheel 28, the height of which prevents easy access to this projection 40 to elements likely to deteriorate it.
• the projection could alternatively be carried by the base 10, and the complementary cavity formed in the plug 12. It could also provide other polarizing means.
• At least one contactor 36 is a piston contactor, comprising a fixed part 37, and a portion 38 movable relative to the fixed part 37, and an elastic member 39, for example a spring, arranged between the fixed portion 37 and the movable portion 38 to return the movable portion 38 to a rest position.
• an elastic member 39 for example a spring
• the fixed part 37 comprises a hollow cylindrical element 37A, electrically insulating, forming a piston body in which the movable portion 38 is intended to move axially.
• the stationary portion 38 also includes a conductive longitudinal member 37B, extending longitudinally between a first end, forming a first seat for the resilient member 39, and a second end extending out of the body 27, to be connected to the circuit board of the antenna.
• the body 27 carries insulating annular support members 44, each insulating annular element 44 carrying the second end of a respective conductive longitudinal member 37A.
• These annular elements 44 are intended to maintain the second ends in precise positioning, to ensure the proper connection of these second ends with the printed circuit of the antenna.
• these annular elements 44, maintaining the second ends contribute to the good strength of the plug 12.
• these annular insulating elements 44 are made of Teflon®.
• the mobile part 38 comprises a thrust member 40, forming a second seat of the elastic member 39, and a contact element 41, intended to cooperate with a respective plate 25 when the base 10 is connected with the plug 12.
• the contact element 41 has a first guide portion 41A, and a second contact portion 41B.
• the first portion 41 A has a generally cylindrical shape, of diameter substantially equal to an inner diameter of the hollow cylindrical member 37A piston body, to cooperate without play with an inner wall of the hollow cylindrical member 37A.
• this first portion 41A is capable of axially guiding the movable portion 38 as it slides in the hollow cylindrical member 37A, making sure that this movable portion 38 does not shift radially. This ensures in particular a good alignment between the thrust element 38 and the contact element 41.
• the first portion 41 A has a surface, preferably flat, cooperating with the thrust member 40.
• the thrust member 40 has a head 40A, intended to cooperate with this flat surface.
• the head 40A has a generally rounded shape, to ensure an optimal contact with the flat surface of the first portion 41 A.
• the second contact portion 41 B forms a head of the contact element 41, intended to cooperate with a respective plate 25 when the base 10 is connected with the plug 12.
• the second contact portion 41 B has a shape rounded, to ensure optimal contact with plate 25.
• the plug 12 also has a waterproofing membrane 42 attached to the body
• the sealing membrane 42 has two through orifices, through which passes a respective contact element 41.
• the first portion 41A of a contact element 41 is disposed on one side of the membrane 42
• the second contact portion 41B is disposed on the other side of the membrane 42, so as to be accessible in contact with a plate 25, the first 41 A and second 41 B parts being connected by a connecting portion 41 C of diameter substantially equal to that of the corresponding orifice.
• the membrane 42 is relatively flexible, to allow movement of the movable portion 38.
• the membrane 42 is made of elastomer, preferably fluorinated silicone.
• the fixing washer 43 extends axially beyond the membrane 42, so as to bear the end stop 33A.
• This free space 46 allows in particular a free deformation of the membrane 42, so as not to block any movement of moving parts 38.
• Such a piston contactor 36 can adapt simply and effectively to its environment, because the position of the movable portion 38 is variable.
• the piston contactors allow a flexible and simple attachment of the base 10 with the plug 12, for example catching games or misalignment.
• Such piston contactors 36 are particularly compact, which allows for an interface of reduced dimensions.
• the interface according to the invention notably allows the radio to transmit and / or receive in two bands simultaneously.
• each piston contactor is dimensioned so as to minimize the coupling between the two bands, so that the signal on a channel does not disturb the signal on the other way.
• each piston contactor is dimensioned so as to minimize crosstalk (called "cross talk" in English, ie the unwanted and untimely superposition of one signal on another) between signals. through these piston contactors, preferably for crosstalk less than 45dB.
• the dimensions of the hollow cylindrical element 37A, electrically insulating, are chosen so as to maximize the resistance of this cylindrical element against the wave losses, this resistance being expressed in the form:
• R is the resistance of the insulating element 37A against the wave losses
• e r is the relative permittivity of the material in which the insulating element 37A is produced
• Dext is the outer diameter of the insulating member 37A
• Dint is the inside diameter of the insulating member 37A.
• the inner and outer diameters of the insulating element 37A are then generally determined by means of simulations making it possible to estimate optimal values.
• the ratio of the diameter of the membrane 42 to the diameter of a second contact portion 41 B is also estimated so as to optimize the decoupling between the two channels.
• the interface according to the invention has an optimum seal, and has good robustness. Such an interface could in particular be used in an aggressive environment.
• the cost of producing such an interface is relatively low, especially lower than the cost of producing two interfaces of the state of the art necessary for the realization of a conventional connection of a two-band radio. with an antenna.
• the base 10 could include various fixing means on the station, and the plug 12 could include various connection means on an antenna.
• the plug 12 could comprise two separate sealing membranes 42, each carrying a respective movable contact element 41.
• the interface could comprise more than two coaxial cables and corresponding contactors, to allow transmission and / or reception on more than two radio frequency bands.

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• Details Of Aerials (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)
• Support Of Aerials (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

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• 2010
  • 2010-05-20 FR FR1002131A patent/FR2960348B1/fr not_active Expired - Fee Related
• 2011
  • 2011-05-20 WO PCT/FR2011/051154 patent/WO2011144881A1/fr active Application Filing
  • 2011-05-20 CN CN201180030963.0A patent/CN103098309B/zh not_active Expired - Fee Related
  • 2011-05-20 JP JP2013510665A patent/JP5727003B2/ja not_active Expired - Fee Related
  • 2011-05-20 KR KR1020127032871A patent/KR20130124456A/ko not_active Application Discontinuation
  • 2011-05-20 BR BR112012029408A patent/BR112012029408A2/pt not_active IP Right Cessation
  • 2011-05-20 US US13/699,274 patent/US8771012B2/en not_active Expired - Fee Related
  • 2011-05-20 MY MYPI2012005005A patent/MY157605A/en unknown
  • 2011-05-20 EP EP11727249.2A patent/EP2572406B1/de active Active
• 2012
  • 2012-11-18 IL IL223093A patent/IL223093B/en active IP Right Grant

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