EP0901692B1 - Procede pour syntoniser des filtres supraconducteurs planaires - Google Patents

Procede pour syntoniser des filtres supraconducteurs planaires Download PDF

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Publication number
EP0901692B1
EP0901692B1 EP97922897A EP97922897A EP0901692B1 EP 0901692 B1 EP0901692 B1 EP 0901692B1 EP 97922897 A EP97922897 A EP 97922897A EP 97922897 A EP97922897 A EP 97922897A EP 0901692 B1 EP0901692 B1 EP 0901692B1
Authority
EP
European Patent Office
Prior art keywords
filter
resonators
housing
cover
filters
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.)
Expired - Lifetime
Application number
EP97922897A
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German (de)
English (en)
Other versions
EP0901692A1 (fr
Inventor
Werner GRÜENWALD
Christian Neumann
Matthias Klauda
Claus Schmidt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0901692A1 publication Critical patent/EP0901692A1/fr
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    • 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
    • H01P1/203—Strip line filters
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20354—Non-comb or non-interdigital filters
    • H01P1/20363—Linear 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
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2135—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using strip line filters

Definitions

  • the invention is based on a method for tuning of planar superconducting filters according to the genus of independent claim.
  • EP 05 22 515 A1 describes a method, a planar one superconducting filter with a single resonator too upset, known.
  • the planar filter to be tuned consists of a substrate with a Superconductor layer on the underside, which as Ground line serves.
  • a microstructure On the top is also made of superconducting material, a microstructure, which has a conductor for capacitive coupling of the High frequency signal, a resonator, and a line for capacitive decoupling of the signal includes.
  • the resonator is an approximately circular planar microstructure, the lateral dimensions determine its resonance properties. It also determines the effective dielectric function around the resonator its resonance properties.
  • the filter is in one Housing, in the lid at least one with a thread provided through hole is provided. This will turned a screw so that the screw head itself located outside the housing, and the threaded end of the Screw in the electrical field in the filter reproducing microwave or millimeter wave immersed.
  • a superconducting platelets with approximately the same diameter like the thread of the screw on the screw tip suggested.
  • WO 94/28592 is a planar bandpass filter High-temperature superconductor base in microstrip technology known.
  • a carrier substrate Superconductor layer on the underside, which as Ground line serves.
  • a microstructure which has a conductor for capacitive coupling of the Radio frequency signal, several resonators, and a line for capacitive decoupling of the signal.
  • the Resonator is a strip conductor of approximately rectangular shape, the lateral dimensions of its resonance properties determine.
  • the carrier substrate from a layer structure, which at least one ferroelectric or antiferroelectric layer includes.
  • ferroelectric or antiferroelectric layer By applying a voltage to it ferroelectric or antiferroelectric layer can whose dielectric function is changed significantly, and thus also the dielectric function of the environment of the planar filter.
  • the resonance characteristic can also of the filter can be changed, but only integrally, that means, in approximately the same way for everyone Resonators that form the filter. With goes along with this process an increase in losses.
  • the method according to the invention with the characterizing features of the independent claim has the advantage that the tuning is significantly less complex and still allows to produce filters with low losses, whereby, due to the less time involved in the tuning, the manufacturing costs of a fully matched filter are significant turn out to be lower, since the time required for the coordination represents a significant part of the manufacturing costs, it being particularly advantageous to provide a displaceable wall on the housing, since this means that all resonance frequencies of all resonators are shifted evenly and only a minor adjustment effort is required for less Screws for coupling the individual resonators is necessary, with a double-walled housing wall with a lowerable inner cover, the housing can be easily sealed and with mi Piezotranslators also fine-tune the operating temperature (usually 77 Kelvin) and, if necessary, also in the refrigerant bath.
  • Another advantage is that, due to the electrical control of the resonance shift, this method is compatible with electrical control loops.
  • the housing cover on the Inside with a conductive plate one exactly defined thickness, since this method already with mounting the filter a roughly pre-adjusted filter supplies.
  • Another advantage is that Production of a suitable set of plates, which are very are inexpensive to manufacture, using a set of filters produced slightly different resonance frequencies can be without different To produce superconductor microstructures for which a incomparably more expensive set of different masks would be necessary.
  • the invention provides for several filters same design in a housing with a stepped cover to accommodate, because in this way a very inexpensive Filter bank for frequency division multiplex applications can be obtained can.
  • FIG 1 shows a planar filter in Microstrip construction in one housing.
  • the planar Filter consists of a dielectric substrate (1), which on the bottom with a superconductor, preferably a high temperature superconductor coated is. This layer forms the ground line (2).
  • On the Top of the dielectric substrate (1) is one Microstructure, also made of superconducting material, applied, consisting of an input line (3), Resonators (4,5,6) and an output line (7).
  • This planar superconducting filter is made into a housing consisting of a base plate (10), a housing wall (11) and a Cover (12) installed.
  • the cover (12) is by means of two Screws (13, 14) attached to the housing wall (11).
  • An incoming millimeter or microwave is over the Input conductor (3) to the series of resonators (4,5,6) coupled.
  • the filtered signal is capacitive coupled output conductor (7) are available.
  • At the in 1 is a planar filter Bandpass filter, in which only microwaves or Millimeter waves (in the following also with the collective term High frequency waves) with a frequency which corresponds to the natural frequency of the resonators (4,5,6), between input conductor (3) and output conductor (7) be transmitted.
  • Other filter types can also be implemented, in particular Band-stop filter, low-pass filter or high-pass filter which also applied the method according to the invention can be.
  • the cover (12) is by means of the screws (13,14) attached to the housing wall (11).
  • the coupling between the individual resonators determines the spectral fine structure within the transmission band.
  • An example of this very weak spectral fine structure is marked with an arrow in FIG.
  • This Coupling is influenced by the coupling screw (20).
  • the Threaded end of the coupling screw dips into both electric field of the resonator (5) as well as in that electric field of the resonator (6) and thus serves as double capacitive coupling between the resonators (5) and (6).
  • a more developed coupling which is here selected embodiment of a further turned Corresponds to the screw, smoothes the fine structure within the Transmission bands.
  • FIG. 3 shows a section through a filter in a housing along a cutting line (30) (see Figure 1).
  • a dielectric substrate On the bottom (2) of a dielectric substrate (1) superconducting layer (2), which acts as a ground conductor.
  • the resonators of the filter are outside of the Section plane and are therefore not visible in Figure 3.
  • the Filter is in a housing, with base plate (10) and Housing wall (11), the structural design of which ensures secure fixation of the filter element, built-in.
  • those skilled in the art are also alternative Attachment methods such. B. gluing, screwing, Brackets etc., obviously.
  • the housing a lid (12), which has holes (50, 52, 53) is provided. Inside the housing, parallel to the lid (12), there is the inner cover (40), which one with the bore (50) has aligned bore (51), which is threaded. On the cover (40) two threaded bolts (41, 42) are attached, through the holes (52, 53) in the cover (12) to the outside protrude, as well as a seal (45) which the inner cover (40) seals against the housing wall. On the threaded bolt (41,42) nuts (44,45) are screwed on.
  • the nuts on the threaded bolts (41, 42) (44,45) serve together with those on the threaded bolts pressing springs (16) for setting and fixing a Distance between the inner cover (40) and the cover (12).
  • the Locking lugs (15) protect the superconducting Microstructure on top of the substrate Damage caused by a mistakenly detached Inner cover (40). It is through the coupling screw (20) possible the coupling between the individual resonators, and thus the spectral fine structure within the Transmission bands to influence.
  • the seal (45) and the fact that the hole (51) is threaded cause a relatively tight housing.
  • the hole (50) instead of the hole (51) with a thread to adjust the coupling screw (20) provided the coupling between resonators and the Separate frequency detuning of the resonators.
  • another screw mechanism for height adjustment of the Inner cover (40) conceivable as the one shown here.
  • FIG. 4 An electrically controllable method, the inner cover lowering to tune the filter is further on Embodiment shown in Figure 4.
  • a dielectric substrate (1) planar filter, of which in the illustrated Sectional drawing of the superconducting ground conductor only (2) is visible in a housing, which consists of a Base plate (10), a housing wall (11) and a cover (12) exists. Filters and housings are along the same Section line cut open like the device in FIG. 3. Identical or functionally identical components as in the previous figures have been given the same reference numerals Mistake.
  • Piezotranslators (60) attached, which in turn with the Inner cover (40) are connected.
  • Inner cover (40) and cover (12) have two coaxial bores (51, 50), one of which the bore (51) is threaded and the Bore (50) with an electrically insulating Guide bushing (61) is provided. In the hole (51) there is a coupling screw (20).
  • FIG. 5 shows another preferred embodiment.
  • the cut is along the executed cutting line shown in Figure 1; same or functionally identical components as in the previous Figures are given the same reference numerals.
  • a filter consisting of a ground wire (2) applied on a dielectric substrate (1), and a resonator not visible in FIG Housing, consisting of base plate (10), housing wall (11) and cover (12) installed.
  • a coupling screw (20) is in a threaded hole (50) is screwed in.
  • the selection of spectral location of the filter band by selecting a plate (70) with the appropriate thickness and its placement on the Inside of the cover (12). Again, that can Coupling screw (20) for influencing the spectral Fine structure of the filter belt can be used.
  • the change in the spectral position of the transmission band is after the assembly of the housing is no longer possible without it The case can be opened again, however, this way pre-vote with very simple means, which then only with the help of the coupling screws (20) Detail needs to be corrected. It is also possible to use a set of selected plates (70) from the same Superconductor microstructure to make a set of filters whose transmission characteristics are exactly in one defined way.
  • FIG. 6 shows the cross section through a filter bank, in which are four identical planar filters (80), made with identical masks on identical Substrates, starting from identical superconductor layers on both sides.
  • the housing consists of a Base plate (10), a housing wall (11) and a cover (12). On the inside of the cover (12) is one Step plate (72) attached.
  • the Housing cover representative of other housing components, which are sufficiently close to the planar filter, so that it is with the electric field which is through the Filter structure propagating high frequency wave interact, used.
  • Possible variations of the Invention is one or more side walls and / or the floor slidable in the above sense shape. It also seems conceivable to use the coupling screws (20) and the sliding lid on different surfaces to implement, for example the coupling screws (20) a side wall coaxial to the line shown in Figure 1 (30), and which are parallel to the substrate (1) trending, the surface (that is, the surface with the Resonators) facing housing surface as displaceable Form lid in the above sense.
  • coupling bolts were used (20), which is in the half-space between two resonators protruded to use, if in addition to the displacement of the Transmission bands through the sliding housing wall the fine structure of the transmission belt can be changed should.
  • one or more tuning screws in the To provide field space over a single resonator it is then possible to go through the entire transmission belt integrally Moving the housing wall to move, and additionally, for example by shifting the resonance of a single resonator, the filter narrowband or to design broadband.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (4)

  1. Procédé pour accorder des filtres planaires (80) d'ondes millimétriques ou micro-ondes à l'aide de plusieurs résonateurs (4, 5, 6), selon lequel
    le filtre est logé dans un boítier et un élément conducteur (40, 72) suffisamment proche du filtre pour coopérer avec le champ électrique de micro-ondes ou ondes millimétriques, peut être déplacé par rapport au filtre ; l'élément conducteur s'étend sur plusieurs résonateurs,
    caractérisé en ce que
    le filtre planaire est supraconducteur,
    la partie d'une paroi de boítier à double paroi, tournée vers le résonateur, peut être déplacée par rapport au filtre, et
    le coulissement est produit par des organes de translation piézo-électriques (60).
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'
    on déplace au moins une autre paroi du boítier.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    sur au moins une paroi intérieure du boítier, il y a une plaque conductrice d'épaisseur nécessaire pour réaliser l'accord souhaité.
  4. Banc de filtres composés d'au moins deux filtres planaires (80) avec plusieurs résonateurs pour les ondes millimétriques ou micro-ondes, intégrés dans un boítier, et sur le côté intérieur du couvercle, on a un élément conducteur en forme de plaque étagée (72), suffisamment proche pour s'étendre sur plusieurs résonateurs, la face supérieure de la plaque, étagée, tournée vers les filtres, coopèrant avec le champ électrique de micro-ondes ou ondes millimétriques, et l'élément conducteur pouvant coulisser par rapport aux filtres,
    caractérisé en ce que
    les filtres planaires sont supraconducteurs et la partie de la paroi de boítier à double paroi qui est tournée vers les résonateurs, peut coulisser par rapport aux filtres, le coulissement étant produit par des organes de translation piézo-électriques.
EP97922897A 1996-05-28 1997-05-09 Procede pour syntoniser des filtres supraconducteurs planaires Expired - Lifetime EP0901692B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19621335A DE19621335A1 (de) 1996-05-28 1996-05-28 Verfahren zur Abstimmung von planaren supraleitenden Filtern
DE19621335 1996-05-28
PCT/DE1997/000934 WO1997045888A1 (fr) 1996-05-28 1997-05-09 Procede pour syntoniser des filtres supraconducteurs planaires

Publications (2)

Publication Number Publication Date
EP0901692A1 EP0901692A1 (fr) 1999-03-17
EP0901692B1 true EP0901692B1 (fr) 2001-10-17

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EP97922897A Expired - Lifetime EP0901692B1 (fr) 1996-05-28 1997-05-09 Procede pour syntoniser des filtres supraconducteurs planaires

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EP (1) EP0901692B1 (fr)
DE (2) DE19621335A1 (fr)
WO (1) WO1997045888A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003338701A (ja) * 2002-05-20 2003-11-28 Seiko Epson Corp 高周波スイッチの製造方法及び高周波スイッチ並びに電子機器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281302A (en) * 1979-12-27 1981-07-28 Communications Satellite Corporation Quasi-elliptic function microstrip interdigital filter
JPS6328103A (ja) * 1986-07-22 1988-02-05 Murata Mfg Co Ltd ストリツプラインフイルタ
FR2605146B1 (fr) * 1986-09-25 1988-12-02 Alcatel Thomson Faisceaux Filtre a bande ajustable

Also Published As

Publication number Publication date
DE59704975D1 (de) 2001-11-22
DE19621335A1 (de) 1997-12-04
WO1997045888A1 (fr) 1997-12-04
EP0901692A1 (fr) 1999-03-17

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