EP2449622A1 - Filtre à haute fréquence - Google Patents

Filtre à haute fréquence

Info

Publication number
EP2449622A1
EP2449622A1 EP10728135A EP10728135A EP2449622A1 EP 2449622 A1 EP2449622 A1 EP 2449622A1 EP 10728135 A EP10728135 A EP 10728135A EP 10728135 A EP10728135 A EP 10728135A EP 2449622 A1 EP2449622 A1 EP 2449622A1
Authority
EP
European Patent Office
Prior art keywords
inner conductor
sections
frequency filter
coupling device
filter according
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
EP10728135A
Other languages
German (de)
English (en)
Other versions
EP2449622B1 (fr
Inventor
Jens Nita
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Kathrein Werke 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 Kathrein Werke KG filed Critical Kathrein Werke KG
Publication of EP2449622A1 publication Critical patent/EP2449622A1/fr
Application granted granted Critical
Publication of EP2449622B1 publication Critical patent/EP2449622B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/202—Coaxial filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
    • H01P11/005—Manufacturing coaxial lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/06—Coaxial lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/04—Coaxial resonators

Definitions

  • the invention relates to a high frequency filter, i. a so-called high pass, according to the preamble of claim 1.
  • a common antenna for the transmit and receive signals.
  • Transmit and receive signals use different frequency ranges.
  • the antenna used must be capable of transmitting and receiving in both frequency ranges.
  • a suitable frequency filtering is required, which ensures that on the one hand, the transmission signals from the transmitter only to the antenna (and not in the direction of the receiver) and on the other hand, the received signals are transmitted from the antenna only to the receiver.
  • a pair of high-frequency filters may be used, both of which pass a particular (namely the respectively desired) frequency band (bandpass filter) or a pair of high-frequency filters, both of which Disable certain (namely, the respectively unwanted) frequency band (band-stop filter), or a pair of high-frequency filters, formed by a filter that passes frequencies below a frequency lying between the transmit and receive band and the overlying locks (low-pass filter), and a Filter that blocks frequencies below this frequency between the transmit and receive bands and transmits the higher frequencies (high-pass filter).
  • bandpass filter namely the respectively desired frequency band
  • band-stop filter Disable certain frequency band
  • a pair of high-frequency filters formed by a filter that passes frequencies below a frequency lying between the transmit and receive band and the overlying locks (low-pass filter), and a Filter that blocks frequencies below this frequency between the transmit and receive bands and transmits the higher frequencies (high-pass filter).
  • filters formed by a filter that passes frequencies below a frequency lying between the transmit and receive band and the overlying locks
  • High-frequency filters of the described type can be constructed differently.
  • a known high-pass filter can consist of a bore or a channel in a milling or cast housing, wherein in the channel or in the bore inner conductor sections are arranged, which are electrically connected via so-called stubs with the outer conductor.
  • the inner conductor sections have (if the entire arrangement should still have a compact size) usually very small sized interruptions, whereby the corresponding inner conductor sections are capacitively coupled at their end faces.
  • the size of the capacitive couplings between the line sections is inversely proportional to the change in the distance.
  • the end-side capacitive coupling between the inner conductors also increases with increasing cross-sectional area of the lines and with increasing dielectric constant of the material, which may be located in the gap between the lines. Since relatively high capacitances are generally required in the coaxial high-pass filters known from the prior art and correspondingly designed, the distance between the end faces is in the axial extension each other positioned inner conductor sections (if, as mentioned, comparatively compact outer dimensions are to be met) usually less than 0.5 mm (for example, when installed in a base station or other antenna device). Often the distance is 0.1 to 0.2 mm.
  • a corresponding axial coaxial high pass is shown in a schematic axial longitudinal section (for example, in plan view without depiction of the cover terminating the outer conductor) and in an axial cross-sectional view (with a cover closing the outer conductor), as it is known from the prior art is known.
  • the housing can also be divided into two or more, for example, comprise two mateable housing sections or housing halves.
  • the outer conductor housing can also be completely closed so that the inner conductor arrangement is only pushed axially into this outer conductor housing. There are no restrictions in this respect.
  • such a coaxial high-pass filter comprises an outer conductor 1, which - as mentioned - usually from a milling or cast housing (metal, metal alloy) consists, in which an axial bore or an axial channel 3 is formed , Along this bore or this channel 3, an inner conductor arrangement 5 is then provided, which consists of a plurality of inner conductor sections 5a.
  • the inner conductor sections end with their inner conductor end face 5b at a short distance A, so that a capacitive coupling results between the inner conductor end faces 5b and thus the inner conductor sections 5a. Further, for example, between These inner conductor end faces 5 b be inserted a dielectric D.
  • the individual inner conductor sections 5a are in each case (usually centrally) via a transverse or perpendicular to the associated inner conductor section 5a extending branch line 7 galvanically coupled to the outer conductor 1, wherein the corresponding branch lines 7 in lateral branch ducts 9 (ie branch line recesses 9) extend in the material of the outer conductor 1 and are galvanically connected to the mentioned outer conductor 1 at the branch line channel bottom 9a (wherein the outer conductor 1 constitutes, as it were, the housing of the high-pass filter thus formed).
  • Such a high pass in a coaxial structure is known, for example, from Matthei, Young, Jones: “Microwave Filters, Impedance Matching Networks, and Coupling Structures", McGraw-Hill Book Company 2001, namely at page 414 (FIGS. 7.07-3) refer to.
  • FIG. 12c A corresponding equivalent circuit diagram for the high-frequency filter known from the prior art according to FIGS. 12a and 12b is reproduced on the basis of FIG. 12c. It can be seen from this that a single inner conductor 5 with individual inner conductor sections 5a is provided, wherein a capacitance C 1 is formed between two inner conductor sections 5 a and of the intrinsically continuous inner conductor sections 5 a to ground or the outer conductor 1 extending the branch line 7 is connected in the form of an inductance I.
  • the measure of the capacitive coupling is determined by the size of the respectively opposite two end faces of the inner conductor sections coupled thereto, by the distance A between the two end-side inner conductor sections and by the dielectric used between the two end-side inner conductor sections.
  • FIGS. 12a and 12b A solution comparable to the state of the art according to FIGS. 12a and 12b has also become known from US 2009/0153270 A1, which corresponds to DE 10 2007 061 413 A1. Shown is a high pass filter with an inner conductor comprising individual inner conductor sections. Two successive inner conductor sections in the axial extension are arranged at a distance from each other, wherein the facing end faces and an adjoining inner conductor section in a partial length in a tubular intermediate piece, which in the middle between the two end faces of the successive inner conductor -Abitese has a closed wall portion.
  • This construction results in an inner conductor section with a double capacitive coupling interposed and successive from the end of an inner conductor section to the tubular intermediate section and from the tubular intermediate section to the next inner conductor section, etc., compared to the exemplary embodiment according to FIG. 12a.
  • the high-pass filter according to the invention can also be used as a single filter, but also in conjunction with one or more similar or different high-frequency filters.
  • the use of the high-frequency filter (HF filter) according to the invention in the mobile radio technology, and in particular in duplex filters, which are required, as explained above, results in the transmission signals fed to an antenna from those via the same Antenna received received signals that are sent or received in staggered frequency ranges to separate.
  • the solution according to the invention consists essentially in that an additional inner conductor coupling element is incorporated into the high frequency filter track, wherein this additional inner conductor coupling element is either metallic and thus electrically conductive or consists of or comprises a metallically or electrically conductive coated dielectric ,
  • This additional Lich mounted inner conductor coupling element is provided in the region of the front-side coupling of the inner conductor sections. If this inner conductor coupling element, for example, hollow cylindrical or generally provided with an inner recess, in this inner conductor coupling element, the ends of the adjacent inner conductor sections, so the respective inner conductor end faces completely or at least partially opposed within the inner conductor coupling element.
  • the inner conductor coupling element with the inner conductor sections cooperating with it is arranged overlapping only in a partial circumferential region, ie, for example, only over an axial length of the respective end face of the inner conductor section away with the end region of the associated inner conductor Section overlapped to realize the additional coupling here.
  • a blocking pole can be achieved with each high-pass filter according to the invention using a corresponding inner conductor coupling element.
  • a plurality of such structures can be interconnected one behind the other (in series), whereby a plurality of additional blocking poles can be generated by appropriate tuning.
  • the high-pass filter according to the invention can also be assembled with conventional further high-pass filter structures to produce one or more blocking poles. There are also no restrictions in this respect.
  • the design of the high-frequency filter compared to the prior art can be significantly shortened. This results in a total of more compact overall dimensions.
  • the mechanical stability can also be increased by the inner conductor coupling elements used. This is especially true for The use of a dielectric in solid form, ie not in air. Because thereby the inner conductor sections, the inner conductor coupling elements and / or the branch lines can be stabilized and held.
  • the dielectric located at least partially in the inner conductor coupling element, in which the inner conductor sections terminate can assume an additional positioning function of the inner conductor coupling element and thus also of the inner conductor sections, especially if the dielectric is also outside the Inner conductor coupling element in the corresponding receiving space (hole, channel) of the outer conductor arrangement is provided.
  • further dielectrics for mechanical stabilization within the structures are possible, for example also layered dielectrics.
  • the structures according to the invention make it possible to transmit high powers. Likewise, which is of great importance in mobile technology in particular, there is overall good intermodulation behavior.
  • a further improvement can also be achieved in the context of the invention in that the coupling of the inner conductor structures between the inner conductor coupling elements and the outer conductor does not necessarily have to be effected by the fact that the corresponding branch lines are galvanic are connected to the outer conductor. It is also possible that the branch lines are capacitively coupled to the outer conductor. In this case too, the solid dielectric possibly located in the outer conductor interior can also be used for positioning and fixing the branch lines capacitively coupled to the outer conductor.
  • a high-frequency filter is provided in the context of the invention, namely a so-called high-pass filter, in which a blocking pole below the passband can be generated by deliberately introducing a structure which is also referred to below as an inner conductor coupling element. If several such structures are connected in series, several blocking poles can be generated below the passband.
  • an inner conductor coupling element may be electrically conductive because it consists for example of a metal or a metallic structure, or it may be formed of a dielectric or comprise this, which is coated, for example, electrically conductive.
  • FIG. 1a a schematic axial longitudinal section through a first embodiment of the invention
  • Figure Ib an axial cross-sectional view along the line I-I in Figure Ia;
  • Figure Ic an equivalent circuit diagram for the embodiment according to the figures Ia and Ib
  • Figure Id a corresponding equivalent circuit diagram in principle as shown with reference to Figure Ic, but in relation to Figure Ic more compact form
  • FIG. 1e shows a diagram for illustrating the attenuation curve in an exemplary embodiment corresponding to FIGS. 1a to 1d to form two blocking poles, caused by the capacitances on the two signal paths;
  • FIG. 1a shows an axial longitudinal sectional view similar to FIG. 1a with respect to FIG. a further embodiment, in which among other things, the branch lines are capacitively coupled to the outer conductor;
  • Figure 3b a cross-sectional view through the
  • FIG. 5a shows another embodiment of the invention in a schematic axial section with different coupling between the inner conductor sections and the inner conductor coupling elements.
  • FIG. 5b shows a schematic axial cross-sectional view along the line VV in FIG. 5a; 6a: a further schematic axial section through an embodiment deviating from FIG. 5a, in which the branch line between inner conductor head pelelement and outer conductor in the outer conductor is not galvanic, but capacitive realized;
  • FIG. 6b shows a cross-sectional view along the
  • FIG. 7a a longitudinal section through a
  • FIG. 7b shows a cross-sectional view along the
  • FIG. 8a shows a schematic longitudinal section through a high-pass filter comprising a high-frequency filter according to the invention, which is connected in series with a conventional high-pass filter according to the prior art;
  • FIG. 8b a cross-sectional view along the
  • FIG 9AL requires a longitudinal section through a further modified embodiment, showing that a high-pass filter of invention according Enhancements no outer conductor to extend a branch line;
  • FIG. 9b a cross-sectional view along the
  • FIG. 10a three schematic cross-sectional representations through 10c: gen through a high-pass filter, to explain that also further tuning elements for changing the electrical properties of the corresponding line sections or the réelleleiterkoppelelemen- te can be provided te;
  • Figure 11 a diagram showing a
  • FIG. 12a is a schematic axial longitudinal section and 12b: position and a cross-sectional view along the line X-X in Figure 12a for a prior art high-pass filter in coaxial structure.
  • FIG. 12c shows an equivalent circuit diagram relating to a prior art high-pass filter in a coaxial structure, as reproduced with reference to FIGS. 12a and 12b.
  • This exemplary embodiment according to the invention differs from the prior art high-frequency filter in coaxial design according to FIGS. 12a and 12b in that an inner conductor coupling device 15 in the manner of an inner conductor coupling element 115 is now provided in the region of the inner conductor end sections 5c. what the inner conductor end portions 5c overlap with the inner conductor coupling element 115 with a certain axial length.
  • the inner conductor coupling device 15 is designed as an inner conductor coupling element 15 a in which the inner conductor end sections 5 c dip with a certain axial length, the inner conductor end faces 5 b of the inner conductors positioned in the axial extension -Sections 5a come to rest at a distance A to each other.
  • the inner conductor sections 5a are arranged on a common axis line Xl in the immediate axial extension to one another and thereby dive coaxially into the inner conductor coupling cylinder 15a.
  • the individual inner conductor sections can be held and anchored to the outer conductor 1 (ie the outer conductor housing 10) by dielectric spacers in the inner conductor space 21 formed as channel 3, for example also in that the entire inner conductor space 21 or only certain portions of the inner conductor space 21 Inner conductor space filled with a solid dielectric, poured out, etc. is or are.
  • dielectric spacers in the inner conductor space 21 formed as channel 3 for example also in that the entire inner conductor space 21 or only certain portions of the inner conductor space 21 Inner conductor space filled with a solid dielectric, poured out, etc. is or are.
  • several can dielectric structures may be provided, for example, at an axial distance in the inner conductor space 21, over which individual regions of the inner conductor sections may be mechanically held and supported relative to the outer conductor.
  • a dielectric 23 in the region of the inner conductor coupling device 15, i. is provided in the interior of the inner conductor coupling cylinder 15a, preferably not of air, but of a solid material (for example plastic, ceramic, etc.) about which the individual inner conductor sections 5a are held and positioned by the inner conductor coupling cylinder 15a.
  • the branch lines 7 already explained in the prior art are not coupled to the individual inner conductor sections 5 a in the embodiment according to the invention, but are coupled to the respective inner conductor coupling device 15, i.
  • the inner conductor coupling element 115 electrically connected and lead preferably transverse and in the embodiment shown perpendicular to the axial extension of the inner conductor Xl Xl 5 in a corresponding branch line channel 9 to the branch line bottom 9a in the outer conductor housing 10 and are opposite to the mecaniclei- ter coupling device 15 with electrically-galvanic the outer conductor 1, ie the outer conductor housing 10 is connected.
  • the individual branch lines can also be located in a second line channel located in the bottom of the outer conductor housing or on opposite sides of the outer conductor.
  • the dielectric preferably formed from a solid dielectric 23 in this exemplary embodiment does not have to extend over the entire axial length of the inner conductor coupling cylinder 15 a, but can be arranged in front of the front end of the inner conductor coupling cylinder 15 a ends (as shown in FIG. 1a for the right-hand example of the coupling) or can even project beyond the inner conductor coupling cylinder 15a in the axial direction (as shown in the exemplary embodiment according to FIG. 1a for the left-hand coupling).
  • the solution according to the invention with uses of the coupling device 15 results in two capacitive couplings connected in series, namely for example a first coupling from the one inner conductor end section 5b to the inner conductor coupling device 15 and from the inner conductor coupling device 15 to the adjacent next inner conductor End portion 5c of a subsequent adjacent inner conductor end portion 5b.
  • These capacitive couplings correspond in terms of function of the front-side coupling between the end faces 5b in the high-pass according to the prior art, as explained with reference to Figures 12a and 12b.
  • the capacitive coupling provided between the end faces 5b is now additionally generated by the abovementioned series-connected capacitive coupling via the new inner conductor coupling device 15, now in this design according to FIGS. 1a and 1b of generating additional blocking poles serves to improve the edge of the high-pass over the prior art.
  • FIG. 1c shows an equivalent circuit diagram of the invention.
  • the equivalent circuit diagram is shown in a more compact representation compared to the representation in Figure Ic. It can be seen that within the scope of the invention, by introducing new capacitances C 2, a further capacitive coupling is now created by which two blocking poles can ultimately be realized by two signal paths P 1 and P 2.
  • FIG. 1e a diagram is then shown in which on the vertical Y-axis, the insertion loss in dB and on the horizontal X-axis, the frequency in GHz for a high-frequency filter is located.
  • the attenuation curve relates to an exemplary embodiment, as has been implemented for the inventive solution according to FIGS. 1 a to 1 d, with an attenuation of, for example, 200 MHz to 960 MHz, wherein the attenuation is greater than 60 dB.
  • the formation of two blocking poles, which are caused by the capacitive couplings on the two signal paths, can clearly be seen in the diagram according to FIG. This improvement according to the invention is neither possible nor known in conventional solutions.
  • both the cross-sectional shape of the outer conductor, the cross-sectional shape of the inner conductor, the cross-sectional shape of the inner conductor coupling device and the cross-sectional shape of, for example, between the inner conductor end sections and the inner conductor coupling device 15 can be provided Dielectric 23 different shapes, in particular cross-sectional shapes.
  • the outer conductor housing extensions 1 ' are shown with greater material extent, in which the mentioned branch line recesses or channels 9 are accommodated for accommodating the branch lines.
  • the outer conductor housing need not be provided with an outer conductor housing extension 1 ', but may be generally tubular (of any cross-sectional shape) so that the branch lines 7 are directly connected to the inner wall of the outer conductor housing or outer conductor tube, generally the outer conductor.
  • the branch line recesses can also be located in the outer conductor area or in the correspondingly removed lid.
  • Figures 2a to 2k show that, for example, the outer contour of the outer conductor 1 may be rectangular or square or generally n-polygonal. Likewise, however, the outer conductor may ultimately have a round or partially round cross-sectional shape, at least on its outer side. He may be designed oval-shaped or cylindrical. There are no restrictions on certain cross-sectional shapes or outer contours.
  • FIGS. 2 a to 2 d also show that, for example, the cross-sectional shape of the inner conductor space 21 has a square or rectangular, cylindrical or generally n-polygonal cross-sectional shape at least outside the region in which the branch line recesses or channels 9 are provided in the outer conductor 1 can which is formed by the outer conductor inner surface Ia.
  • Figures 2a to 2k also show that the inner conductor 5, i. the inner conductor sections 5a and in particular the inner conductor end sections 5c can have different cross-sectional shapes, for example round cross-sectional shapes, square or rectangular cross-sectional shapes, generally n-polygonal cross-sectional shapes. But also oval cross-sectional shapes or mixed shapes are possible for the inner conductor cross-section, as well as a cross-sectional shape, are provided in the rounded transition areas between the different side surface. Likewise, however, elliptical cross-sectional shapes, etc. are also conceivable. There are no restrictions.
  • the cross-sectional representations according to FIGS. 2a to 2k furthermore show that, above all, the inner conductor coupling devices 15 can have very different cross-sectional shapes, for example in the manner of a hollow cylinder with a round cross-sectional shape or with an angular cross-sectional shape or at least partially or in sections with an angular or square shape Outer surface 15b and thereby internal, also partially or partially round, square or generally n-polygonal inner surface 15c etc ..
  • the individual wall sections, ie the individual surfaces on the outside or inside of the inner conductor coupling element 115 pass over corners or rounding into adjacent next wall sections.
  • the inner conductor coupling device 15 with respect. its outer surface 15b may have an oval cross-sectional shape, and in Deviation to the interior facing the inner conductor end portions facing surfaces 15c may have a different cross-sectional shape, for example, a square or rectangle approximated cross-sectional shape.
  • the example according to FIG. 2f also shows that the inner conductor coupling element 115 can not be completely closed in the circumferential direction but can be provided with an opening section 15d, similar to the exemplary embodiment according to FIG. 2g.
  • the opening region 15d as well as the distance between the inner conductor end section 5b and the inner conductor coupling device 15 are filled with a dielectric 23.
  • FIGS. 2h and 2i also show that the inner conductor coupling element 115, for example, only in one side region or a partial peripheral region-with respect to the inner conductor sections -is generally parallel or generally more or less in the direction of overlap with the inner conductor.
  • End sections 5 c may be arranged to here in addition to the capacitive coupling between the adjacent inner conductor end faces 5 b of two mutually elongated inner conductor sections 5a sections an additional coupling between the respective inner conductor end portion 5 b to the inner conductor coupling element 115 and the inner conductor Coupling element 115 to produce the next adjacent inner conductor end portion of a next inner conductor portion 5a.
  • 2f, 2g, 2h or 2i or 2j show that the inner conductor coupling device 15 to be coupled to the inner conductor end portions 5c in a peripheral region of more than 10 ", in particular more than 20", 30 ' , 40', 50 ' , 60 “, 70 ' , 80 * , 90 * , 100 ', 110", 120', 130 “, 140 ', 150', 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320 , 330 ', 340', 350 "can surround.
  • the same cross-sectional representations also show that the inner conductor coupling device 15 the inner conductor end portions 5c to be coupled by less than 360 ", 350 ', 340', 330 ', 320', 310 ', 300', 290 °, 280 ', 270 ", 260 ', 250', 240 ', 230", 220', 210 ', 200', 190 ', 180', 170 ', 160', 150 ', 140', 130 ', 120 “, 110' , 100 ", 90 ', 80', 70 ', 60', 50 ', 40', 30 'and in particular less than 20 °.
  • the inner conductor coupling element 115 can be semicylindrical in cross-sectional form, the variant according to FIG. 2i showing that the design of the coupling element 115 even if it encloses the inner conductor end sections only in a partial circumferential region or is arranged to have a deviating from the inner contour 15c outer contour 15b may be designed, for example, inside semi-cylindrical or externally rectangular.
  • the shaping and / or arrangement of the inner conductor coupling device 15 consist.
  • the corresponding inner conductor end sections 5 b and the inner conductor coupling device 15, which is generally parallel thereto, are plate-shaped, ie also plate-shaped, so may be formed as a flat material, preferably with a dielectric located therebetween 23, which is also designed again plate-shaped in cross section.
  • another dielectric 23 '(rectangular in cross-section) is provided underneath the one inner conductor end section, which can also be provided on the coupling device.
  • the outer conductor can be formed as a closed overall housing, with a corresponding inner conductor channel 3.
  • the outer conductor - Housing is divided into two and an actual housing portion which is closed with a preferably detachable Osenleitergepureckel Ia.
  • the housing can also consist of two housing halves 1 b and 1 c, which can preferably be separated centrally along a separation plane T at the level of the inner conductors.
  • this separation plane can also be formed in a different position and does not have to lie in the plane of the inner conductor sections, so that the two housing parts are of different sizes. Any modifications are possible here.
  • FIG. 3a a schematic axial longitudinal section and in FIG. 3b a schematic axial section in deviation from FIG. 1a or 1b show that the electrical connection between the inner conductor coupling device 15 and the outer conductor 1 via the branch line 7 is not only galvanic but also capacitive.
  • the branch line 7 opposite the inner conductor coupling device 15 is shown with a branch line coupling section 7a in the form of a branch line base 7a, which in the variant according to FIG. 3a lies on the left a cubic shape, for example a cube shape but also a cylindrical shape and in the variant according to FIG. 3a on the right can have a spherical shape or likewise a cylindrical shape.
  • the recess Ib is then provided in the material of the outer conductor Ia, in which engages the corresponding branch line coupling portion 7a.
  • the outer conductor recess 1b is preferably matched to the cross-sectional shape or contour of the branch line base section 7a (although deviations are also possible here and the cross-sectional shape of the outer conductor recess 1b deviates from the cross-sectional shape or contour of the branch line base section 7a or is completely different designed by it).
  • a solid dielectric 23a is provided between the branch line coupling section 7a and the outer conductor recess 1b. hen.
  • the inner conductor coupling element 15 is likewise provided with a solid dielectric 23 so that the inner conductor end sections 5a are likewise held and positioned, and the actual inner conductor sections 5a are not held in the inner conductor space 21 by further dielectric spacers and must be positioned.
  • air is provided as the dielectric 23 a between the branch line coupling section 7 a and the outer conductor recess 1b.
  • FIGS. 3a shown in longitudinal section
  • 3b which reproduces a cross section along the line III-III in FIG. 3a
  • the coupling devices 15 do not extend in the axial longitudinal direction, ie in the extension direction X1 of the inner conductor sections 5a must have the same design, but in the circumferential direction at different sections different longitudinal extents and thus different sized overlapping sections with the associated inner conductor Endab- sections 5c may have.
  • the inner conductor sections can also have different diameters, including in the axial longitudinal extent of gradations, where they go from a smaller diameter to a larger diameter or vice versa.
  • additional dielectrics may be provided in the region of the coupling elements (for example in the region of the inner surfaces of the outer conductors) for example, reach to the coupling element or end before.
  • FIGS. 3a and 3b It is also partly referred to FIGS. 2 a to 2 k, which represent and reproduce a few variants.
  • the inner conductor end sections 5c are formed with the same diameter and, for example, the same cross-sectional shape, approximately round, wherein the inner conductor coupling element is formed with a larger inner diameter than the outer diameter of the inner conductor end sections, so that the inner conductors End portions in the interior 15e of the tube in this embodiment•sbei- trained inner conductor coupling device 15 can dive in a certain axial length, so that the associated inner conductor end faces 5b in the aforementioned distance A to each other.
  • the interior 15e of the coupling device 15 is filled in this embodiment with a solid dielectric 23, for example, also poured out, over which the inner conductor sections 5b may be mechanically mithalten.
  • the inner conductor end sections 5c located furthest outwards are provided adjacent to their end faces 5b with a circumferential annular projection 5r, ie a region which has a larger outer diameter than the inner conductor end section adjacent thereto. section 5c.
  • a circumferential annular projection 5r ie a region which has a larger outer diameter than the inner conductor end section adjacent thereto. section 5c.
  • a circumferential inner conductor groove 5n is formed in an end region of the inner conductor end section 5c shown on the right, whereby the same advantage is achieved. Again, good axial fixations against inner conductor and dielectric are given.
  • the one inner conductor end section 5c is formed, for example, with a blind bore (generally an inner conductor receptacle 5 "c), into which the second inner conductor end section 5c, designed with a smaller outer diameter, contacts without contact in a certain extent
  • a direct capacitive coupling between the two end sections 5c is realized between the two inner conductor sections 5a positioned in this way and, on the other hand, a capacitive coupling of the one inner conductor section 5a or inner conductor end section 5c (which coincides with FIG the mentioned inner conductor receptacle 5 "c is provided) to the thus arranged overlapping inner conductor coupling device 15 and the further capacitive coupling of this inner conductor coupling device 15 to the right in Figure 4d inner conductor end portion 5c.
  • the dielectric 23 is on the right side via the coupling device in the radial direction.
  • the diameters of the inner conductor sections 5a are different and also the central axis of the two inner conductor end sections shown.
  • the central axes X2 and X3 are offset with respect to one another, so that the distance of the outer circumference of the inner conductor end section 5c on the right does not come to rest coaxially with the, for example, tubular or hollow cylindrical inner conductor coupling element.
  • the inner conductor end section 5c on the left in FIG. 4e transitions into a tapered end section 5'c, which has a smaller outer diameter.
  • the inner conductor end section on the right has, adjacent to the dielectric 23, a peripheral annular shoulder 5r which has a larger outer diameter than the inner conductor end section immersed in the dielectric.
  • the variant according to FIG. 4f merely shows a plate-shaped coupling element 115, which is arranged in an overlapping manner and connected thereto with the interposition of a dielectric 23 parallel to the inner conductor end sections 5c (parallel position) running towards each other at a short distance A from each other ,
  • FIG. 4g furthermore shows that the coupling element (even if, for example, it is completely or partially closed in the circumferential direction) does not have to have the same outside or inside diameter over its axial length. In this embodiment according to Figure 4g, it is conical. Finally, but also other gradations not only on the inner conductor, but may also be provided on the coupling device 15, as shown for example with reference to Figure 4c and 4e with respect to a survey 15e and 15s for the gradation.
  • FIG. 4h shows only schematically that generally the inner conductor end sections to be directly capacitively coupled do not necessarily have to be in axial extension with respect to one another, but can generally end adjacent to one another. In this case, according to FIG.
  • FIG. 5a in the longitudinal section
  • FIG. 5b in cross section along the line VV in FIG. 5a
  • the inner conductor end sections 5c of the inner conductor sections 5b to be coupled end-to-end end in a fork-shaped or pot-shaped or hybrid form, the actual inner conductor coupling element 115 then being arranged on the inside between the fork-shaped or pot-shaped inner conductor end section is.
  • This also results in the multiple capacitive coupling directly between the inner conductor end portions on the one hand and between the respective inner conductor end portion and the associated Inner conductor coupling element to the other.
  • Figure 6a shows an embodiment corresponding to Figure 5a again with the difference that - similar to Figure 3a - the branch lines 7 are not galvanically connected to the outer conductor, but in the region of the branch line base sisabête 7a capacitively.
  • FIG. 6b shows a corresponding cross-sectional view along the line VI-VI in FIG. 6a.
  • a solid dielectric or air can again be provided as a dielectric at the base section.
  • the branch line coupling section 7a can be designed pin-shaped or preferably plate-shaped and comes to lie at a small distance A1 to a correspondingly shaped, here flat coupling plane to the outer conductor 1.
  • a dielectric can here also be provided ⁇ 23 of solid material and not from the air again. The coupling surface of the outer conductor thus extends perpendicular to the extension of the outer conductor.
  • any high-pass filter structure according to the invention can be interconnected in series to form a common high-pass according to one of the variants or modifications explained.
  • FIG. 7a for example, two high-pass filters are connected in series, one of the high-pass filters having the structure of that example according to FIG. 5a and the high-pass filter of a variant lying on the right. te corresponds to Figure Ia. This achieves a high pass with two additional blocking poles.
  • FIGS. 8a and 8b merely shows that individual high passages, for example, as shown by the solution according to the invention on the basis of one of the preceding explained examples, can be interconnected with a conventional high-pass filter structure, as explained in the background with respect to the prior art has been.
  • branch lines 7 do not necessarily have to end in branch line channels 9 in the outer conductor housing 1, that is to say that the outer conductor housing is not compulsory, as explained on one of the preceding exemplary embodiments, with an outer conductor housing extension 1 '. must be provided.
  • a square conductor or tubular outer conductor housing is used, in which the inner conductor sections with the coupling elements and the branch lines extending away from them are arranged in the corresponding inner conductor space 21, which are galvanically or capacitively connected to the outer conductor housing.
  • the individual branch lines can also be connected on opposite sides to the outer conductor housing or likewise to the bottom or cover at the end galvanically or capacitively.
  • the individual branch ducts 9 can also be provided in a corresponding cover construction, so that here the branch pipes can be provided and housed.
  • tuning elements T can also be provided at one or more points of the outer conductor housing, preferably adjustable from the outside (for example, by varying inward and outward rotation into the inner space 21).
  • a right-lying tuning element T is rod-shaped and even projects beyond the opening section 15d into the space inside the coupling element 115 into a free space in the dielectric provided there and can also be preferred from the outside by further insertion. and twisting outwards into the outer conductor housing.
  • the electrical properties or individual line sections or inner conductor coupling elements can be changed and thus the frequency response of the high-pass filter can be set differently according to the specifications and wishes.
  • all electrically conductive structures may consist of metal, metal alloys, for example of cast, milling, turning, deep-drawing and / or sheet metal or bent parts.
  • the corresponding electrically conductive parts explained consist of an insulator, plastic, generally a dielectric, and in this case the electrically conductive parts or surfaces are coated with an electrically conductive surface.
  • mixed forms of metallic components for example, for the outer conductor
  • Inner conductor sections or branch lines may be formed of electrically conductive surfaces provided with or formed thereon electrically conductive paths, which are formed, for example, of dielectric materials.
  • a high-pass filter with a coaxial structure (ie with an inner conductor or inner conductor section running in an outer conductor) can basically be realized, which comprises at least one additional metallic or electrically conductive inner conductor coupling element or the corresponding inner conductor coupling device for generating additional blocking poles below the passband comprises.
  • one Sperrpol can be achieved per used inner conductor coupling element 115, so generally per used inner conductor coupling device 15.
  • the S parameters for the case of a high-pass filter according to the invention with the degree 5 with two inner conductor coupling elements and resulting S parameters are compared with respect to FIG. a solution according to the prior art ( Figures 12a and 12b), and plotted on the frequency.
  • the curves marked with a triangle and a square concern the high-pass filter according to the invention, whereas those with a
  • the illustrated high-pass filter can typically be used in the frequency range from 100 MHz to 10 GHz.
  • the electrical coupling of the individual conductor sections can be determined by the distance of the end sides of the directly coupled inner conductor sections and by the distance between the inner conductor end section 5c (or its outer surface 5d) and the adjoining upper section. and / or inner surface 15c of the inner conductor coupling device 15, in particular of the inner conductor coupling element 115 and by the use of a dielectric generated or their size can be set differently.
  • the front side capacitive coupling of the line pieces generates a Sperrpol below the passband.
  • the inner conductor coupling elements are galvanically connected or capacitively coupled to the outer conductor.
  • the inner conductors as well as the coupling devices can be formed from the most diverse of home-made electrically conductive materials or from dielectrics with electrically conductive coatings, where, for example, the inner conductor is also produced from a flat or sheet material. can be, as well as, for example, the branch line. Restrictions do not exist in this respect either.
  • the high-frequency filter structure according to the invention can be used for a high pass and a conventional filter structure for the low pass.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un filtre à haute fréquence (filtre passe-haut) amélioré présentant les caractéristiques suivantes: En plus des au moins deux surfaces frontales de conducteur interne (5b) couplées de manière capacitive ou des segments terminaux de conducteur interne (5c) couplés de manière capacitive de deux segments de conducteur interne (5a) couplés, est prévu également au moins un dispositif de couplage de conducteur interne (15) ou au moins un élément de couplage de conducteur interne (115), ledit au moins un dispositif de couplage de conducteur interne (15) ou ledit au moins un élément de couplage de conducteur interne (115) étant disposé, en partie, de manière à se superposer aux segments terminaux de conducteur interne (5c) des segments de conducteurs internes couplés (5b), et la conduite de dérivation (7) s'étendant entre le dispositif de couplage de conducteur interne (15) ou l'élément de couplage de conducteur interne (115) et le conducteur externe (1).
EP10728135.4A 2009-07-01 2010-06-22 Filtre à haute fréquence Active EP2449622B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009031373A DE102009031373A1 (de) 2009-07-01 2009-07-01 Hochfrequenzfilter
PCT/EP2010/003803 WO2011000501A1 (fr) 2009-07-01 2010-06-22 Filtre à haute fréquence

Publications (2)

Publication Number Publication Date
EP2449622A1 true EP2449622A1 (fr) 2012-05-09
EP2449622B1 EP2449622B1 (fr) 2021-04-07

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EP10728135.4A Active EP2449622B1 (fr) 2009-07-01 2010-06-22 Filtre à haute fréquence

Country Status (7)

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US (1) US9240620B2 (fr)
EP (1) EP2449622B1 (fr)
KR (1) KR101690531B1 (fr)
CN (1) CN102473992B (fr)
DE (1) DE102009031373A1 (fr)
HK (1) HK1167748A1 (fr)
WO (1) WO2011000501A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP5456992B2 (ja) 2008-06-20 2014-04-02 富士フイルム株式会社 モード同期固体レーザ装置
CN102683779B (zh) * 2012-05-18 2014-09-10 京信通信系统（中国）有限公司 通信腔体器件及其椭圆函数型高通滤波通路
US10050322B2 (en) 2014-03-24 2018-08-14 Telefonaktiebolaget Lm Ericsson (Publ) Coaxial filter and method for manufacturing the same
DE102014116724A1 (de) 2014-11-14 2016-05-19 Phoenix Contact Gmbh & Co. Kg Dielektrische Koppelhülse
DE102015006739A1 (de) 2015-05-22 2016-11-24 Kathrein-Austria Ges.M.B.H. Hochfrequenzleitersystem mit leitungsgebundener HF-Durchführung
US9590583B2 (en) * 2015-06-29 2017-03-07 Agilent Technologies, Inc. Alternating current (AC) coupler for wideband AC signals and related methods
JP2017163535A (ja) * 2016-01-28 2017-09-14 マクドナルド，デットワイラー アンド アソシエイツ コーポレーション アンテナシステムのｒｆコンポーネントのための小型で軽量なｔｅｍラインネットワーク
CN110277614A (zh) * 2019-06-08 2019-09-24 扬州江嘉科技有限公司 一种具有传输零点的介质同轴低通滤波器
DE112021008354T5 (de) * 2021-10-13 2024-07-25 Hitachi Energy Ltd Hochspannungsanlage und wellenleiter zur verwendung in einer hochspannungsanlage

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US2516529A (en) 1946-03-04 1950-07-25 Richard C Raymond Capacitive connection for coaxial lines
US3167729A (en) * 1962-10-29 1965-01-26 Sylvania Electric Prod Microwave filter insertable within outer wall of coaxial line
US3792385A (en) * 1972-11-06 1974-02-12 Rca Corp Coaxial magnetic slug tuner
JPS5353906Y2 (fr) 1974-03-28 1978-12-23
US4329667A (en) 1979-11-07 1982-05-11 Uti Corporation Coaxial cable low frequency band-pass filter
DE19907413C1 (de) 1999-02-20 2000-08-31 Forschungszentrum Juelich Gmbh Koaxialwellenleiter
ATE475999T1 (de) * 2003-03-04 2010-08-15 Rohm & Haas Elect Mat Koaxiale wellenleitermikrostrukturen und verfahern zu ihrer bildung
DE10328881B3 (de) 2003-06-26 2005-01-13 Kathrein-Werke Kg Kontaktfreier HF-Verbinder
EP1689019A1 (fr) 2005-02-03 2006-08-09 Spinner GmbH Filtre coaxial equilibré
DE102007061413A1 (de) 2007-12-11 2009-06-25 Telegärtner Karl Gärtner GmbH Hochpassfilter
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Also Published As

Publication number Publication date
US9240620B2 (en) 2016-01-19
EP2449622B1 (fr) 2021-04-07
CN102473992B (zh) 2014-06-25
KR101690531B1 (ko) 2016-12-29
US20120133457A1 (en) 2012-05-31
CN102473992A (zh) 2012-05-23
KR20120111933A (ko) 2012-10-11
WO2011000501A1 (fr) 2011-01-06
HK1167748A1 (en) 2012-12-07
DE102009031373A1 (de) 2011-01-05

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