EP2871706A1 - Résonateur rempli diélectriquement pour applications Imux 30 GHz - Google Patents

Résonateur rempli diélectriquement pour applications Imux 30 GHz Download PDF

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Publication number
EP2871706A1
EP2871706A1 EP20140003730 EP14003730A EP2871706A1 EP 2871706 A1 EP2871706 A1 EP 2871706A1 EP 20140003730 EP20140003730 EP 20140003730 EP 14003730 A EP14003730 A EP 14003730A EP 2871706 A1 EP2871706 A1 EP 2871706A1
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EP
European Patent Office
Prior art keywords
filter
receiving space
receiving
dielectric
longitudinal direction
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.)
Ceased
Application number
EP20140003730
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German (de)
English (en)
Inventor
Tobias KÄSSER
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.)
Tesat Spacecom GmbH and Co KG
Original Assignee
Tesat Spacecom GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tesat Spacecom GmbH and Co KG filed Critical Tesat Spacecom GmbH and Co KG
Publication of EP2871706A1 publication Critical patent/EP2871706A1/fr
Ceased legal-status Critical Current

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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
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
    • 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
    • H01P1/2002—Dielectric waveguide filters
    • 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
    • H01P3/16—Dielectric waveguides, i.e. without a longitudinal conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/10—Dielectric resonators

Definitions

  • the present invention relates to a dielectric filter having a plurality of dielectric resonators for a data transmission path, in particular for a satellite transmission path, in particular for a
  • Satellite radio transmission link in particular for an uplink of a satellite radio transmission link.
  • the satellite radio transmission link may in particular be a Ka-band transmission link in a frequency range from 17.7 to 21.2 GHz for the downlink and 27.5 to 31 GHz for the uplink.
  • Resonators can be used in the form of a passive component as a filter in radio transmission links. Practically used filters consist almost always of several coupled resonators. As the frequency of the signal transmission on a radio link increases, the requirements for the filters change, in particular as far as the structural and spatial requirements on the one hand and the requirements for the effectively usable bandwidth of a filter are concerned.
  • the effectively usable bandwidth is that frequency bandwidth at which a filter behavior around a central frequency is constant or almost constant.
  • Such filters are designed as self-balancing components of higher order and are used for example in input multiplexers.
  • a dielectric filter which has a receiving element with a plurality of receiving spaces and a cover element.
  • the cover member is designed to cover the receiving spaces in the receiving element.
  • Each receiving space of the plurality of receiving spaces is designed to receive a dielectric.
  • the dielectric filter is characterized in that each receiving space constitutes a parallelepiped cavity.
  • a receiving space represents a resonator of the filter and the filter has a plurality of resonators.
  • This substantially cuboid structure of the resonator allows the dielectric filter to have a uniform or nearly uniform operation over a wide bandwidth. For example, the behavior of the filter can remain essentially the same over a bandwidth of several hundred MHz.
  • the receiving element and the cover may in particular be made in one piece and made of aluminum or an aluminum alloy or have aluminum or an aluminum alloy. In one embodiment, the receiving element and the cover element may be coated with silver.
  • the receiving element form a housing with receiving spaces in the form of cavities and the cover a cover for the housing.
  • the recording rooms are cuboid. This means that the cavities thus formed have six substantially planar side surfaces, wherein oppositely arranged side surfaces are the same size or identical. adjacent side surfaces are of different sizes or shapes, i. that the edge lengths of the edges of the receiving space are not all the same length.
  • At least two opposing surfaces may be rectangular with different edge length of the base or square with equal edges of the base.
  • the dielectric receiving space designed in this way enables an optimized course of electric field lines through a dielectric arranged in the receiving space, so that the bandwidth of the filter is increased.
  • angles of the receiving space can also be rounded or flattened, for example, without such an adaptation of the shape of the receiving space changing anything of its fundamentally cuboid shape.
  • a receiving space is a recess or a recess in a surface of the receiving element.
  • the filter is a passive filter.
  • the filters For use in input multiplexers on satellites, it is specifically required that the filters have high selectivity while minimizing distortion within the passband. This is accomplished by coupling a number of typically 8, 10 or 12 resonators such that By means of cross-couplings, both an increased edge steepness and a flat course of the transmission within the pass band is achieved.
  • the resonators must have a low loss behavior (quality of at least several thousand) and a low temperature drift; Conventionally, waveguide resonators made of silver-plated invar steel are used for this purpose.
  • the resonator described herein or the filter structure At an operating frequency of, for example, 30 GHz, when using a typical ceramic having a dielectric constant of 30, the resonator quality is more than 5000 and the spurious mode spacing is more than 5 GHz. Couplings can be realized between adjacent resonators, as are necessary for filter bandwidths of up to 500 MHz; In this case, couplings can be realized with both signs, ie when two coupled similar resonators are viewed with both the push-pull mode at a lower frequency as well as with the common mode at a lower frequency.
  • the plurality of receiving spaces are arranged in two rows, each row of receiving spaces extending in the longitudinal direction of the filter.
  • the receiving element or the filter is longer in the longitudinal direction of the receiving element or the filter than in a transverse direction transverse to the longitudinal direction.
  • the receiving spaces in a row are arranged side by side so that a plurality of receiving elements lie next to one another in the longitudinal direction of the receiving element or the filter, two receiving spaces being arranged in the transverse direction of the receiving element or the filter, which corresponds to two rows.
  • the plurality of receiving spaces are arranged distributed uniformly on a first row and on a second row.
  • first row and the second row have the same number of receiving spaces.
  • the receiving element on ten receiving spaces, which are arranged in two rows of five receiving spaces.
  • a first receiving space and a second receiving space are arranged in a first row in the longitudinal direction of the filter adjacent to each other.
  • the first receiving space and the second receiving space are coupled to one another via a longitudinal coupling.
  • the longitudinal coupling represents a coupling of adjacent receiving spaces in the longitudinal direction of the filter.
  • the longitudinal coupling is a material recess which connects the cavities of the first receiving space and of the second receiving space to one another.
  • the dimensions of the recess of the longitudinal coupling can be at most identical to the dimensions of the coupled by the longitudinal coupling side surfaces of the adjacent receiving spaces.
  • the dimensions of the recess of the longitudinal coupling are smaller than the dimensions of the coupled side surfaces of the receiving spaces, for example a quarter of the area, one third of the area, two-fifths of the area or half of the area and all ratios between these figures.
  • the longitudinal coupling is a breakthrough through the partition between adjacent receiving spaces.
  • This breakthrough may in particular have a rectangular shape, wherein here too the angles may be rounded or flattened or not rounded or not flattened.
  • the receiving spaces in the receiving element to identical dimensions.
  • a first receiving space in a first row of receiving spaces and a third receiving space in a second row of receiving spaces transversely to the longitudinal direction of the filter adjacent to each other, so that the first receiving space and the third receiving space in the longitudinal direction of the filter is not offset from each other exhibit.
  • two receiving spaces in the first and second rows are arranged in the longitudinal direction of the receiving element at the same height in each case.
  • the longitudinal axes of the first receiving space and the third receiving space extending transversely to the longitudinal direction of the filter and coincide, since the first receiving space and the third receiving space along the longitudinal direction of the receiving element have no offset or are arranged without offset.
  • the first receiving space and the third receiving space are coupled to one another via a transverse coupling.
  • the transverse coupling is similar to the longitudinal coupling a material recess, which connects the cavities of the first receiving space and the third receiving space together.
  • the transverse coupling is a material breakthrough transversely to the longitudinal direction of the filter between in the longitudinal direction of the filter at the same height or offset arranged receiving spaces.
  • the transverse coupling can also have a substantially rectangular cross section and, in a preferred embodiment, is smaller than the side surfaces of the first and third receiving spaces coupled by the transverse coupling.
  • the ratio of the amounts of longitudinal coupling to those of the longitudinally coupled side surfaces of receiving chambers adjacent in the same row is greater than the ratio of the degrees of transverse coupling those of the cross-coupled side surfaces of adjacent in the two rows receiving spaces.
  • dimension is to be understood as meaning that the corresponding surface, ie the size of the cross-section of the transverse or longitudinal coupling and the surface of the respective coupled side surfaces.
  • an extension of a receiving space transverse to a longitudinal direction of the filter is greater than an extension of the receiving space along the longitudinal direction of the filter.
  • the longitudinal axis of a receiving space extends transversely and in particular perpendicular to the longitudinal direction of the filter.
  • the longitudinal axis of a dielectric arranged in the receiving space extends transversely and in particular perpendicular to the longitudinal direction of the filter.
  • the dielectric filter as described above and below has a plurality of dielectrics.
  • a dielectric is arranged in each of the plurality of receiving spaces.
  • the dielectric is cuboid and a longitudinal axis of the dielectric is transverse to a longitudinal direction of the filter.
  • the dielectric may in particular comprise a dielectric ceramic having a high permittivity or dielectric constant of, for example, 30.
  • the dielectric can be embodied as a rectangular column or square column, the base area having identical edge lengths or in each case two identical edge lengths that are different from the other two edge lengths.
  • the length of the dielectric element is greater than the largest edge length of the base.
  • the dielectric element has a substantially rectangular or square cross-section.
  • the corners may be rounded or flattened.
  • the longitudinal axis of the dielectric is perpendicular to a longitudinal direction of the filter.
  • the longitudinal axis of a dielectric of a first receiving space and the longitudinal axis of a dielectric of a third receiving space extend coaxially.
  • the first receiving space in a first row of receiving spaces and the third receiving space in a second row of receiving spaces transversely to the longitudinal direction of the filter adjacent to each other, so that the first receiving space and the third receiving space in the longitudinal direction of the filter have no offset from each other.
  • the center axis of the dielectric members in the first accommodating space and in the third accommodating space is coaxial, i.e., in the third accommodating space. these central axes coincide in such an embodiment.
  • the dimensions of the transverse coupling are greater than the dimensions of the base of the dielectric elements.
  • Fig. 1 shows a dielectric filter 100 in a plan view. In this case, two rows are shown in each case to five receiving spaces 110A1, 110B1, 110A2, 110B2.
  • a receiving space is a cuboid recess in the surface of the receiving element, wherein a dielectric element 130 is arranged in each receiving space.
  • a longitudinal direction 132 of the dielectric elements 130 extends perpendicular to the longitudinal direction 102 of the filter.
  • the longitudinal direction 112 of the receiving spaces extends parallel to the longitudinal axis 132 of the dielectric elements 130.
  • the receiving chambers 110A1 and 110B1 or 110A2 and 110B2 arranged side by side in a row in the longitudinal direction 102 are respectively coupled to the adjacent side surfaces 116 via a longitudinal coupling 128 which, for reasons of clarity, is arranged in FIG Fig. 1 not shown. This will be discussed in more detail in the following figures.
  • the receiving spaces 110A1 and 110A2 or 110B1 and 110B2, which are opposite or adjacent to the two rows, are coupled to the mutually facing side surfaces via a transverse coupling 126.
  • the transverse coupling is shown in more detail in the following figures.
  • Fig. 2 shows two receiving spaces 130A1, 130A2, which are coupled via a transverse coupling 126 with each other.
  • the dielectric elements 130A1, 130A2 are arranged so that their longitudinal axes 132 coincide or coaxial.
  • the transverse coupling represents a material breakdown which connects the cavities of the receiving spaces 130A1, 130A2 in the direction of the longitudinal axis 132 of the dielectric elements.
  • the transverse coupling is a recess, which is less deep relative to the receiving element than the receiving chambers and whose extension in the longitudinal direction of the filter is less than the extension of the receiving chambers in the longitudinal direction of the filter.
  • the edge lengths of the receiving space are a few mm, for example between 2 mm and 12 mm, in particular between 3 mm and 8 mm, in particular between 4 mm and 5 mm.
  • the edge lengths of the dielectric element are between 0.5 mm and 6 mm, in particular between 1 mm and 3.5 mm.
  • a receiving space may, for example, have an edge length of 4 mm in the longitudinal direction 102 of the filter, a depth also 4 mm (depth corresponds to the direction in the drawing plane), and an edge length of 5 mm transverse to the longitudinal direction 102 of the filter.
  • the dielectric member 130 may have a footprint of 1 mm x 1 mm and a longitudinal length 132 of 3.3 mm.
  • the dielectric element 130 may in particular be arranged spatially centrally or symmetrically with respect to all three spatial axes in the receiving space.
  • the dielectric element can be held in the target position by means of a support element.
  • the support element may in particular have a low permittivity or dielectric constant.
  • the support element is not shown in the figures for reasons of clarity. It may be, for example, a holding bar, which is mechanically coupled to the dielectric element on the one hand and with a surface of the receiving space, in particular directly mechanically coupled by means of a material connection, in particular by means of a material connection with material addition, for example by means of an adhesive bond.
  • FIGS. 3A and 3B show an isometric view of a receiving space 110A1 with a dielectric element 130 disposed therein.
  • the receiving space is delimited by the end face 114 (this is the area left in FIG Fig. 3A ), through the side surface 116 (this is the area in the Drawing plane in Fig. 3A front) and through the base 118 (this is the area below in Fig. 3A ) as well as the respective surfaces opposite these surfaces.
  • the receiving space is delimited or closed by the cover element, as is apparent from Fig. 7 results.
  • the dielectric element 130 is arranged centrally in the receiving space with respect to all three spatial axes.
  • Fig. 4 shows a plan view of two coupled via a longitudinal coupling 128 receiving spaces 110A2, 110B2.
  • the longitudinal axis of the dielectric elements extends in the longitudinal direction 112 of the receiving space and thus perpendicular to the longitudinal direction 102 of the filter.
  • Fig. 5 shows an end face 114 of a receiving space spanned by the edges 115A, 115B and a transverse coupling 126 arranged therein in the form of an opening through the end face 114 in the direction of the adjacent receiving space, which is spanned by the edges 127A, 127B, in the case of FIG Fig. 5 into the drawing plane.
  • the cross coupling can be connected to its in Fig. 5 shown upper edge relative to the edge 127A are limited by the cover.
  • the end face 114 and the transverse coupling 126 are square in this embodiment.
  • Fig. 6 shows a side surface 116 of a receiving space, which is rectangular, ie that the edges 117A, 117B of the side surface 116 are not the same length. The same applies to the edges 129A, 129B of the longitudinal coupling 128 arranged in the side surface 116.
  • the longitudinal coupling may have a different cross section, starting from a side surface 129A, 129B, a single tongue or a single tooth protrudes in the direction of the respective opposite side surface, without touching it.
  • the tongue or the tooth can in the longitudinal direction of the filter, ie in a direction in the plane of the Fig. 7 in, extend over the entire depth of the longitudinal coupling. This would give the longitudinal coupling 128 a comb-shaped or rake-shaped cross-section.
  • Fig. 7 shows an isometric view of a filter 100 with a receiving element 170 and a cover 180.
  • the receiving spaces 110A1, 110B1 are arranged as recesses in two rows.
  • a dielectric element 130 is arranged, wherein in Fig. 7 for clarity, only one of them is shown.
  • the longitudinal couplings and cross couplings are in Fig. 7 not explicitly shown. However, there is a longitudinal coupling between all arranged in the same row receiving spaces, so for example between 110A1 and 110B1, as a material recess in the material bridge separating these receiving spaces.
  • the cross-couplings couple in an analogous manner in each case at the same height located receiving spaces of the opposite rows.

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EP20140003730 2013-11-06 2014-11-05 Résonateur rempli diélectriquement pour applications Imux 30 GHz Ceased EP2871706A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013018484.3A DE102013018484B4 (de) 2013-11-06 2013-11-06 Dielektrisch gefüllter Resonator für 30GHz-Imux-Applikationen

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EP2871706A1 true EP2871706A1 (fr) 2015-05-13

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EP20140003730 Ceased EP2871706A1 (fr) 2013-11-06 2014-11-05 Résonateur rempli diélectriquement pour applications Imux 30 GHz

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US (1) US9601817B2 (fr)
EP (1) EP2871706A1 (fr)
CA (1) CA2870444A1 (fr)
DE (1) DE102013018484B4 (fr)

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Publication number Priority date Publication date Assignee Title
CN112689927B (zh) 2018-09-18 2023-01-10 京瓷Avx元器件公司 滤波器组件
KR102319051B1 (ko) 2019-01-08 2021-11-02 주식회사 케이엠더블유 도파관 필터
WO2020145590A1 (fr) 2019-01-08 2020-07-16 주식회사 케이엠더블유 Filtre de guide d'ondes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6320484B1 (en) * 1998-11-30 2001-11-20 Nec Corporation High frequency dielectric filter
EP1174944A2 (fr) * 2000-07-17 2002-01-23 Mitec Telecom Inc. Filtre passe-bande accordable
EP1372212A1 (fr) * 2002-06-12 2003-12-17 Matsushita Electric Industrial Co., Ltd. Résonateur diélectrique et élément de circuit haute fréquence l'utilisant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69025293T2 (de) * 1989-12-14 1996-08-22 Murata Manufacturing Co Kombinier-/Sortiergerät für Radiofrequenzsignale
US5608363A (en) * 1994-04-01 1997-03-04 Com Dev Ltd. Folded single mode dielectric resonator filter with cross couplings between non-sequential adjacent resonators and cross diagonal couplings between non-sequential contiguous resonators
US6535086B1 (en) * 2000-10-23 2003-03-18 Allen Telecom Inc. Dielectric tube loaded metal cavity resonators and filters
JP3864923B2 (ja) * 2003-04-02 2007-01-10 株式会社村田製作所 誘電体共振器装置、通信用フィルタおよび移動体通信基地局用通信装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6320484B1 (en) * 1998-11-30 2001-11-20 Nec Corporation High frequency dielectric filter
EP1174944A2 (fr) * 2000-07-17 2002-01-23 Mitec Telecom Inc. Filtre passe-bande accordable
EP1372212A1 (fr) * 2002-06-12 2003-12-17 Matsushita Electric Industrial Co., Ltd. Résonateur diélectrique et élément de circuit haute fréquence l'utilisant

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Publication number Publication date
CA2870444A1 (fr) 2015-05-06
DE102013018484A1 (de) 2015-05-07
US9601817B2 (en) 2017-03-21
US20150123747A1 (en) 2015-05-07
DE102013018484B4 (de) 2023-12-07

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