EP0714150A1 - Filtre supraconducteur en technique de ligne à bande - Google Patents

Filtre supraconducteur en technique de ligne à bande Download PDF

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Publication number
EP0714150A1
EP0714150A1 EP95113967A EP95113967A EP0714150A1 EP 0714150 A1 EP0714150 A1 EP 0714150A1 EP 95113967 A EP95113967 A EP 95113967A EP 95113967 A EP95113967 A EP 95113967A EP 0714150 A1 EP0714150 A1 EP 0714150A1
Authority
EP
European Patent Office
Prior art keywords
band filter
superconductor band
substrate
magnetic field
stripline
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.)
Withdrawn
Application number
EP95113967A
Other languages
German (de)
English (en)
Inventor
Wolfgang Grothe
Klaus Dr. Voigtlaender
Matthias Dr. Klauda
Claus Dr. 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 EP0714150A1 publication Critical patent/EP0714150A1/fr
Withdrawn legal-status Critical Current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
    • H01P1/201—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/70—High TC, above 30 k, superconducting device, article, or structured stock
    • Y10S505/701—Coated or thin film device, i.e. active or passive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/866—Wave transmission line, network, waveguide, or microwave storage device

Definitions

  • the invention is based on a superconductor band filter according to the preamble of the main claim.
  • Superconductor band filters are known in which a plurality of strip conductors applied side by side on a substrate serve to allow high-frequency signals to pass only in a certain frequency range. The frequency range is determined by the geometric arrangement of the strip lines on the substrate.
  • the superconductor band filter according to the invention with the characterizing features of the main claim has the advantage that, despite a geometrically fixed arrangement of the strip conductors on the substrate, a variable pass characteristic of the superconductor band filter can be achieved.
  • tuning device it is particularly advantageous to design the tuning device in such a way that a mechanical force or tension can be exerted on the stripline, since a very inexpensive tuning device can be implemented in this way.
  • the tuning device has at least one pressure element which can be pressed against the surface of the substrate or the stripline, a reliable and at the same time efficient tuning of the superconductor band filter can be achieved.
  • a pressure element has a rounded pressure head, the generation of local voltages on the substrate or on the strip conductors is advantageously avoided, as a result of which the risk of damage to the superconductor band filter by the pressure elements is reduced.
  • the use of a flexible substrate advantageously increases the tunability of the superconductor band filter, since the flexibility enables a greater mechanical deformation and thus a larger tuning range to be achieved.
  • the variation of field strength and / or field direction of the magnetic field has the advantage that a very different influence on the pass characteristic of the superconducting band filter is made possible.
  • a mechanical adjusting device 16 is used to move a pressure element 4, at the end of which a pressure head 7 is attached. The pressure head 7 rests on the superconductor band filter 3 on the surface of the stripline 1.
  • Another mechanical adjusting device 17 drives a further pressure element 6, which has a further pressure head 18 at its end.
  • the further pressure head 18 lies against the substrate 5 on the side opposite the first pressure head 7.
  • the adjusting devices 16, 17 and the pressing elements 4, 6 with the pressure heads 7, 18 together form a tuning device 2.
  • the superconducting material is a type II superconductor, ie it has two critical field strengths, the three leading states of the superconductor, namely the Meissner phase and the mixed phase and the non-superconducting phase.
  • the pressing elements 6, 4 can be displaced perpendicular to the surface of the superconductor band filter 3 by means of the adjusting devices 16, 17.
  • the superconductor band filter 3 clamped at its ends deforms by being deflected in its center with respect to the edge regions clamped in the holders 10.
  • the deflection of the superconductor band filter 3 causes a change in the linear dimensions of the stripline 1. Such a change also affects the length of the stripline 1, which has a direct influence on the center frequency of the superconductor band filter 3.
  • the mechanical deflection of the substrate 5 and the stripline 1 causes a mechanical tension in the striplines 1.
  • the effective dimensions of the stripline 1 effective for the high-frequency signals to be transmitted are changed by the high-frequency magnetic fields of the high-frequency signals being able to penetrate into the stripline 1 at different depths, which means that depending on the direction of the mechanical forces Tuning device 2, the center frequency and / or the bandwidth of the superconductor band filter 3 is shifted.
  • the preferred bending direction for influencing the filter properties of the superconductor band filter 3 can be set by selecting the locations for fastening the brackets 10 or by aligning the stripline 1. It is also provided to arrange several such tuning devices 2 next to one another in order to achieve finer adjustability.
  • the pressure heads 7, 18 are advantageously elliptical or round, so that no local stresses are introduced into the superconductor band filter 3, which could cause cracking.
  • a material with sufficient flexibility, such as ceramic or a plastic film, is advantageously suitable for the substrate 5.
  • the tuning device 2 makes it possible above all to adjust the center frequency and / or the bandwidth of the superconductor band filter 3 after the stripline 1 has been structured. This can cause frequency shifts caused by inaccuracies in the structuring of the stripline 1 or in the design the structure of the stripline 1 were caused to be compensated.
  • the two mechanical adjustment devices 16, 17 can also be coupled in their drive in order to avoid, for example, an undesired opposing pressure on the substrate 5.
  • FIG. 2 shows a further exemplary embodiment of a tunable superconductor band filter 3 according to the invention.
  • FIG. 3 The same parts were designated with the same numbers as in Figure 1.
  • Three coils 11, 12, 13 are arranged around the substrate 5 with the strip conductors 1 applied thereon.
  • the three coils 11, 12, 13 each have a magnetic field direction axis, the three magnetic field direction axes being aligned orthogonally to one another.
  • Each magnetic field direction axis represents the field direction for a magnetic field component 8, 14, 15.
  • a magnetic field 20 composed of the three magnetic field components 8, 14, 15 of the coils 11, 12, 13 can be generated, which can take any direction.
  • FIG. 3 shows the surface of the substrate 5 with the strip conductors 1.
  • the stripline 1 have an effective width b, an effective length l and an effective distance a from one another.
  • the pass band of the superconductor band filter 3 is defined by these geometric dimensions and by the thickness and dielectric constant of the substrate 5.
  • the stripline 1 Due to the layer structure of superconducting materials, the stripline 1 has a strong anisotropy of the magnetic penetration depth ⁇ (T).
  • the size of the magnetic penetration depth ⁇ (T) can therefore be varied by varying the field direction of the magnetic field 20.
  • the high-frequency magnetic field of the high-frequency signals is added to the magnetic field 20.
  • the demagnetization factor n of the stripline 1 is important, which strongly depends on the geometry of the stripline 1.
  • the coil 11 is arranged such that the magnetic field component 8 generated by it is oriented approximately perpendicular to the plane of the stripline 1.
  • the thickness of the stripline 1 is usually very small compared to its width and even smaller compared to its length.
  • the demagnetization factor n is therefore relatively high due to the large difference between the width and thickness of the stripline 1.
  • a high demagnetization factor n results in a low so-called effective lower critical field strength H c1, eff c (T).
  • H c1, eff c (T) the stripline 1 in this magnetic field 20 generated by the only magnetic field component 8 has a higher field concentration in its edge area than in the middle of its area. Therefore, the highest field strength always occurs at the edge of the stripline 1.
  • a first type of adjustment of the center frequency of the superconductor band filter 3 is possible by varying the field strength range of the magnetic field component 8 below the critical field strength H c1, eff c (T) determined by the demagnetization factor n. This adjustment can be fine-tuned relatively.
  • the effective lower critical field strength H c1, eff c (T) is exceeded directly at the edge region of the stripline 1.
  • the stripline 1 get thereby within a thin layer thickness, which is smaller than the magnetic penetration depth ⁇ (T), in the so-called mixed state, and the effective width b and length l of the stripline 1 decrease by this layer thickness, ie the current of the high-frequency signals then flows mainly in the Layer which is in the mixed state, while the magnetic field 20 and the high-frequency magnetic field continue to penetrate the strip conductor 1 only approximately to the magnetic penetration depth ⁇ (T).
  • the geometry factor of the stripline 1 for the magnetic field components 14, 15 in the plane of the stripline surface is substantially different from the geometry factor for the magnetic field component 8 perpendicular to it. This also results in a reduced demagnetization factor n and an increased one critical field strength H c1, eff c (T).
  • the critical field strength H c1, eff c (T) is therefore only of subordinate importance, since due to the demagnetization factor n ⁇ 1 present here, the mixed state only occurs with very much higher magnetic fields 20 occurs. Therefore, these two magnetic field components 14, 15 can only be used for adjusting the filter properties via the first type of adjustment, ie below the critical field strength H c1, eff c (T).
  • the choice of field strength is therefore decisive for the respectively effective mechanism, the field strength to be selected also being dependent on the field direction relative to the surface of the strip conductor 1 due to the geometric relationships of the strip conductor 1.
  • the direction of orientation and the field strength of the magnetic field 20 can thus be changed, thereby changing the effective dimensions of the stripline 1 for the high-frequency magnetic fields and currents of the high-frequency signals.
  • the center frequency of the superconductor band filter 3 changes.
  • the effective or effective width b of the strip line 1 via a suitably aligned magnetic field 20 a change in the effective distance a of Strip line 1 with each other and thereby cause a variation in the bandwidth of the superconductor band filter 3.
  • the entire phase diagram of a type II superconductor (Meissner phase and mixed state) can therefore be used by varying the direction and strength of the magnetic field 20.
  • the magnetic and the mechanical tuning device are advantageously arranged on a common superconductor band filter 3 and thereby combine the two mechanisms.
  • the filter according to the invention is not limited to the pattern of stripline 1 shown in the drawing, but can be used with any arrangement and configuration of stripline 1.
  • By arranging a number of mechanical tuning devices multiple tuning can be carried out both for only a single superconductor band filter 3 but also for a plurality of superconductor band filters 3 arranged on a common substrate 5, which are exerted on the substrate 5 by locally distributed different mechanical bending forces.
  • a preferred area of application for the superconductor band filter 3 according to the invention is the filtering of high-frequency signals in satellite communication or mobile radio technology.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Superconductor Devices And Manufacturing Methods Thereof (AREA)
EP95113967A 1994-11-22 1995-09-06 Filtre supraconducteur en technique de ligne à bande Withdrawn EP0714150A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4441488A DE4441488A1 (de) 1994-11-22 1994-11-22 Supraleiterbandfilter
DE4441488 1994-11-22

Publications (1)

Publication Number Publication Date
EP0714150A1 true EP0714150A1 (fr) 1996-05-29

Family

ID=6533824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113967A Withdrawn EP0714150A1 (fr) 1994-11-22 1995-09-06 Filtre supraconducteur en technique de ligne à bande

Country Status (4)

Country Link
US (1) US5770546A (fr)
EP (1) EP0714150A1 (fr)
JP (1) JPH08222908A (fr)
DE (1) DE4441488A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110832962A (zh) * 2017-06-20 2020-02-21 株式会社富士 电子元件搭载机

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7803529B1 (en) * 1995-04-11 2010-09-28 Sequenom, Inc. Solid phase sequencing of biopolymers
US6141571A (en) * 1996-10-29 2000-10-31 Massachusetts Institute Of Technology Magnetically tunable ferrite microwave devices
US6094588A (en) * 1997-05-23 2000-07-25 Northrop Grumman Corporation Rapidly tunable, high-temperature superconductor, microwave filter apparatus and method and radar receiver employing such filter in a simplified configuration with full dynamic range
US5949311A (en) * 1997-06-06 1999-09-07 Massachusetts Institute Of Technology Tunable resonators
DE19757294B4 (de) * 1997-12-22 2004-01-29 Siemens Ag Elektronisches Diebstahlschutzsystem für Kraftfahrzeuge
US6215644B1 (en) 1999-09-09 2001-04-10 Jds Uniphase Inc. High frequency tunable capacitors
SE516031C2 (sv) * 1999-09-16 2001-11-12 Ericsson Telefon Ab L M Omkopplingsbar mikrovågsanordning
US6229684B1 (en) 1999-12-15 2001-05-08 Jds Uniphase Inc. Variable capacitor and associated fabrication method
US6496351B2 (en) 1999-12-15 2002-12-17 Jds Uniphase Inc. MEMS device members having portions that contact a substrate and associated methods of operating
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
US6762660B2 (en) * 2002-05-29 2004-07-13 Raytheon Company Compact edge coupled filter

Citations (3)

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Publication number Priority date Publication date Assignee Title
US3663902A (en) * 1970-02-27 1972-05-16 Guy Deutscher Method for modifying the characteristics of a microwave and device for the application of said method
JPS59152701A (ja) * 1983-02-18 1984-08-31 Fujitsu Ltd マイクロ・ストリツプ線路
JPH02101801A (ja) * 1988-10-11 1990-04-13 Mitsubishi Electric Corp バンドリジェクションフィルタ

Family Cites Families (3)

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FR2220929B1 (fr) * 1973-02-20 1976-06-11 Minet Roger
JPS6490001A (en) * 1987-09-30 1989-04-05 Hitachi Ltd Centrifugal film dryer with blade free rom sticking
JPH06216606A (ja) * 1993-01-18 1994-08-05 Toyo Commun Equip Co Ltd 円筒形バンドパスフィルタ及びその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3663902A (en) * 1970-02-27 1972-05-16 Guy Deutscher Method for modifying the characteristics of a microwave and device for the application of said method
JPS59152701A (ja) * 1983-02-18 1984-08-31 Fujitsu Ltd マイクロ・ストリツプ線路
JPH02101801A (ja) * 1988-10-11 1990-04-13 Mitsubishi Electric Corp バンドリジェクションフィルタ

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
J.H. TAKEMOTO-KOBAYASHI ET AL.: "Monolithic high-Tc superconducting phase shifter at 10 GHz", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 40, no. 12, NEW YORK US, pages 2339 - 2344, XP000335894 *
M.R. MINET ET AL.: "Filtres hyperfréquences intégrés a surtension élevée utilisant des supraconducteurs", COLLOQUE INTERNATIONAL SUR LA MICROELECTRONIQUE AVANCEE, 6 April 1970 (1970-04-06) - 10 April 1970 (1970-04-10), PARIS, pages 271 - 281, XP001401535 *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 312 (E - 0948) 5 July 1990 (1990-07-05) *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 285 (E - 287)<1722> 26 December 1984 (1984-12-26) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110832962A (zh) * 2017-06-20 2020-02-21 株式会社富士 电子元件搭载机
CN110832962B (zh) * 2017-06-20 2021-04-09 株式会社富士 电子元件搭载机

Also Published As

Publication number Publication date
DE4441488A1 (de) 1996-05-23
JPH08222908A (ja) 1996-08-30
US5770546A (en) 1998-06-23

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