Conventional coaxial lines of the type set forth in US 2007/0264 872 A1, as they are used as rigid line connections in high-frequency technology, for example, for the connection of a coaxial jack or a coaxial socket to a high-frequency unit attached within a housing, have hitherto been plugged together from several individual parts. The inner conductor generally consists of several turned parts compressed or screwed together, between which supports made of insulating material manufactured in a material-removing manner are fitted. The fitting of this accordingly prefabricated inner-conductor-supporting-ring unit within the rigid outer conductor is, once again, implemented through several connected tubular parts plugged into one another, so that the edges of the supporting rings are clamped between annular contact surfaces of these tubular parts plugged into the outer conductor. This known manufacturing technology for rigid coaxial lines is very cost intensive. The smaller the dimensions of such coaxial lines, the more difficult an accurate manufacture using this manufacturing technology becomes.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This summary is not intended to identify key features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The object of the invention is therefore to provide a coaxial line of the type mentioned in the introduction, which can also be manufactured with small dimensions and high precision but in a simple and cost favourable manner.
This object is achieved on the basis of a coaxial line according to the preamble of claim 1 by its characterising features. Advantageous further developments also with regard to a particularly simple possibility for the insertion of the inner-conductor-supporting-ring unit into the outer conductor are specified in the dependent claims.
Through the direct injection moulding of the supporting rings onto the one-piece inner conductor using known micro-injection technology, the inner-conductor-supporting-ring unit can be manufactured with high precision and stability. With this manufacturing method, the supporting ring is attached to the inner conductor without tolerance air, additional assembly and adjustment operations are not required. Tolerance accumulations do not generally occur in the case of a one-piece realisation. The construction method according to the invention is particularly suitable for high-frequencies, at which the dimensions of such coaxial lines are becoming ever smaller.
A particularly simple and yet precise method of construction is achieved in the combination of an inner-conductor-supporting-ring unit of this kind manufactured using injection-moulding technology with a fitting according to the invention of this unit in the outer conductor according to dependent claim 5. Through this direct gluing of the supporting rings to the cylindrical internal wall of the outer conductor, a one-piece manufacture of the outer conductor is also possible, and the clamping technique using several components plugged one inside the other previously provided for the supporting attachment within the outer conductor is not required.
Moreover, an accurate adjustment of the inner-conductor-supporting-ring unit relative to the outer conductor is possible, that is to say, the plug gap S can be accurately adjusted.
However, this special gluing technique can be used not only for the fitting of an inner-conductor-supporting-ring unit according to claims 1 to 4 with supporting rings injected-moulded directly onto the inner conductor, but could also be used for such inner-conductor-supporting-ring units, in which the supporting rings are manufactured separately as turned parts and are clamped between inner-conductor pieces compressed together. In the case of the manufacture of the inner-conductor-supporting-ring unit according to this conventional manufacturing method, it is only necessary to provide corresponding gluing grooves on the circumference of the supporting rings manufactured separately as a turned part.
The invention is explained in greater detail below with reference to schematic drawings of exemplary embodiments. The drawings are as follows:
By placing an injection mould on the inner conductor at the required position of the supporting ring 2, the latter is injection moulded using a known micro-injection technology directly into the flat, turned groove with rectangular cross-section in the form presented in enlargement in
On the outer circumference of the supporting ring 2, a V-shaped gluing groove 3 is formed, which is limited on both sides by annular sealing surfaces 4. This gluing groove 3 with the sealing surfaces 4 is also formed using micro-injection technology directly through a corresponding shape of the injection-moulding tool. This gluing groove 3 is used according to
In the fitting region of the supporting rings 2, funnel-shaped boreholes 7 and degassing boreholes 8 disposed diametrically opposite are formed within the outer conductor. After the insertion of the inner-conductor-supporting-ring unit within the outer conductor, an appropriate liquid glue is introduced via the funnel-shaped boreholes 7 into the gluing groove 3 of the supporting ring. This introduction is facilitated by the degassing apertures 8. As the glue, a glue with low dielectric constant is preferably used. When the gluing groove 3 has been completely filled with glue, a rigid, structurally stable attachment of the supporting rings 2 within the outer conductor is accordingly achieved.
The invention is not restricted to the exemplary embodiment presented. All of the features described and/or illustrated can be combined with one another as required within the framework of the invention.
Number | Date | Country | Kind |
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10 2008 009 309 | Feb 2008 | DE | national |
10 2008 012 591 | Mar 2008 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2009/000987 | 2/12/2009 | WO | 00 | 8/13/2010 |
Publishing Document | Publishing Date | Country | Kind |
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WO2009/100906 | 8/20/2009 | WO | A |
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International Preliminary Report on Patentability mailed Dec. 9, 2010, in corresponding International Application No. PCT/EP2009/000987, filed Feb. 12, 2009, 5 pages. |
International Preliminary Report on Patentability, dated Apr. 30, 2010, issued in corresponding International Application No. PCT/EP2009/000987, filed Feb. 19, 2009. |
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Number | Date | Country | |
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20100314167 A1 | Dec 2010 | US |