EP0896744B1 - Dual-mode-mikrowellen-bandpassfilter aus hochgüteresonatoren - Google Patents
Dual-mode-mikrowellen-bandpassfilter aus hochgüteresonatoren Download PDFInfo
- Publication number
- EP0896744B1 EP0896744B1 EP97922878A EP97922878A EP0896744B1 EP 0896744 B1 EP0896744 B1 EP 0896744B1 EP 97922878 A EP97922878 A EP 97922878A EP 97922878 A EP97922878 A EP 97922878A EP 0896744 B1 EP0896744 B1 EP 0896744B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mode
- dual
- fact
- filter according
- dielectric
- 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
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Classifications
-
- 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
- H01P7/105—Multimode 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
-
- 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 present invention relates to a dual-mode two-pole filter, such as B. a bandpass filter for the Microwave range, consisting of a resonator for two Dipole modes, each with a dielectric that at least a high temperature superconductor film is arranged with a shielding case over the high temperature superconductor film is arranged and the dielectric encloses, and with a coupling device for Coupling the dipole modes and in particular for coupling from microwaves to the electromagnetic fields of the used dipole modes. It also relates to a multi-pole Dual mode filter.
- bandpass filters in the microwave range (4-20GHz) play an important role in the preselection of individual communication channels.
- Analog multiplexers with filters based on cavity resonators are usually used there, in which the quality factors of the individual resonators are in the range of a few 10 4 .
- the mostly circular cylindrical cavity resonators are operated in most cases in so-called “dual modes", ie orthogonal dipole modes with a preferred direction of the electromagnetic fields in the circular area. This means that two poles of a filter can be realized with one resonator, ie an n-pole filter based on "dual-mode" resonators consists of n / 2 resonators.
- US Pat. No. 4,489,293 discloses a strongly miniaturized "dual-mode" filter based on dielectric resonators.
- the HE 111 mode of a cylindrical dielectric is used, which splits into two orthogonal dipole modes.
- tan ⁇ is the loss tangent of the material from which the dielectric resonator is made.
- Some dielectrics, such as sapphire, LaAlO 3 and rutile, have tan ⁇ values of a few 10 -6 or even less below a temperature of T 100K, so that, in principle, grades between 10 5 and 10 6 would be possible with cooled, dielectric resonators.
- the limitation is caused by losses in the different parts i of the wall of the metallic shielding housing, which are each characterized by the surface resistance of the wall material R s, i and by a geometry factor G i .
- the latter results from the distribution of the electromagnetic fields for the respective vibration mode of the resonator.
- the geometry factors are so low that the quality for a normally conductive copper housing is around 10 4 .
- the superconducting "image plane" did not lead to higher grades because the losses dominated in the remaining normal-conducting parts of the wall or in the dielectric.
- WO 93/09575 discloses circular cylindrical dielectric resonators with two end plates made of high-temperature superconductor films. With these, grades in the range of 10 6 were demonstrated, since in the TE 011 vibration mode used there the geometry factor is sufficiently large for the normal conductive outer surface of the cylinder. However, due to the rotational symmetry of the field distribution, this mode is not a dipole mode, so that "dual-mode" operation is not possible here.
- a filter according to the preamble of claim 1 is known from EP-A2-0656670. The object of the invention is therefore to create a dual-mode filter in which the quality factors for the individual resonators are 10 5 to 10 6 .
- the task is for a two-pole filter according to the invention solved in that the dielectric is hemispherical, is trained.
- the realization of more than two-pole Filtering is achieved according to claim 13.
- the sub-claims 2-5 contain advantageous features Coupling to the electromagnetic fields of the dipole modes to adjust the resonance frequency of the dipole modes and the Setting the coupling between the dipole modes.
- a dual-mode two-pole filter 1 is shown schematically in a side view in FIG. 1a.
- a dielectric 3 (for example made of LaAlO 3 ) designed as a dielectric hemisphere is arranged on a high-temperature superconductor film 5 (hereinafter referred to as HTS film).
- HTS film high-temperature superconductor film 5
- the invention is not restricted to the arrangement of a single HTS film; rather, in another embodiment, another HTS film 5 can also be provided as the upper end plate of a cylindrical shielding housing 7.
- the metallic shield housing 7 can be rectangular, cylindrical or hemispherical and consists, for. B. preferably made of a highly conductive metal such as copper.
- the coupling to the two dipole modes of the "dual mode" is carried out by a coupling device, the Coupling elements 9 either linear coaxial antennas (Fig. 1a and 1b) for coupling to the electrical field or Coaxial loops (not shown) for coupling to the are magnetic field.
- the coupling elements 9 are through Holes 11 passed through the superconducting films 5.
- the setting of the coupling between the dipole modes takes place via another adjustable dielectric Rod 15 (Fig. 1b), preferably at an angle of 45 ° arranged with respect to the orientation of the dipole modes is.
- FIG. 2 shows a four-pole filter consisting of two "dual-mode" resonators 1, 1.
- the coupling between the two Resonators 1, 1 is the distance between the two Defined hemispheres and can optionally by a another adjustable dielectric rod between the Hemispheres are matched.
- several hemispheres can be in the 2 shown side by side. The hemispheres do not necessarily have to be in one Row be arranged.
- the metallic shield housing 7 should be in all places at least one the diameter of the hemisphere corresponding distance from the hemisphere surface have so that the losses in the shielding housing do not increase get high.
- the hemisphere diameter is 9.6 mm
- the dielectric constant of the hemisphere material is 23.4 (LaAlO 3 ).
- Diameter / height of the circular cylindrical shielding housing are 26 / 14mm.
- the calculation results in a resonance frequency of 6.58GHz, the mode is the fundamental mode (lowest resonance frequency) of the resonator.
- the calculated geometry factors are 114 ⁇ for the lower end face (superconducting film), 16300 ⁇ for the upper end face and 10400 ⁇ for the outer surface.
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
- Fig. 1a
- eine schematische Seitenansicht eines Dual-mode-Zweipolfilters gemäß vorliegender Erfindung;
- Fig. 1b
- eine schematische Draufsicht des Dual-mode Zweipolfilters aus Fig. 1a;
- Fig. 2
- eine schematische Draufsicht eines Dual-mode-Vierpolfilters gemäß vorliegender Erfindung;
- Fig. 3a
- eine schematische Seitenansicht eines berechneten Beispiels einer Verteilung des elektrischen Feldes in einem Resonator gemäß vorliegender Erfindung;
- Fig. 3b
- eine schematische Draufsicht des Beispiels aus Fig. 3a;
- Fig. 4a
- eine schematische Seitenansicht eines berechneten Beispiels einer Verteilung des magnetischen Feldes in einem Resonator gemäß vorliegender Erfindung,
- Fig. 4b
- eine schematische Draufsicht des Beispiels aus Fig. 4a.
Claims (13)
- Dual-mode-Zweipolfilter bestehend aus einem Resonator für zwei Dipolmoden, mit je einem Dielektrikum, das auf wenigstens einem Hochtemperatur-Supraleiter-Film angeordnet ist, mit einem Abschirmgehäuse, das über dem Hochtemperatur-Supraleiter-Film angeordnet ist und das Dielektrikum umschließt, und mit einer Kopplungseinrichtung zur Ankopplung der Dipolmoden,
dadurch gekennzeichnet,
daß das Dielektrikum (3) halbkugelförmig ausgebildet ist. - Dual-mode-Zweipolfilter nach Anspruch 1,
dadurch gekennzeichnet,
daß die Kopplungseinrichtung zwei Kopplungselemente (9) aufweist, und daß in dem wenigstens einen Hochtemperatur-Supraleiter-Film (5) Löcher (11) zur Aufnahme jeweils eines Kopplungselementes (9) ausgebildet sind. - Dual-mode-Zweipolfilter nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß in dem weinigstens einen Hochtemperatur-Supraleiter-Film (5) oder im Abschirmgehäuse (7) dielektrische Stäbe (13, 15) zum Abgleich der Resonanzfrequenz der Dipolmoden angeordnet sind. - Dual-mode-Zweipolfilter nach Anspruch 3
dadurch gekennzeichnet,
daß die dielektrischen Stäbe (13, 15) den Kopplungselementen (9) in einer Ebene gegenüberliegen und längsverstellbar sind. - Dual-mode-Zweipolfilter nach einem der Ansprüche 1-4,
dadurch gekennzeichnet,
daß in dem wenigstens einen Hochtemperatur-Supraleiter-Film (5) oder im Abschirmgehäuse (7) ein dielektrischer Stab (15) zur Einstellung der Kopplung zwischen den Dipolmoden angeordnet ist. - Dual-mode-Zweipolfilter nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß das Dielektrikum (3) aus La AlO3 ist. - Dual-mode-Zweipolfilter nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß das Abschirmgehäuse (7) aus einem gut leitenden Metall besteht. - Dual-mode-Zweipolfilter nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß die dielektrischen Stäbe (13, 15) aus Saphir sind. - Dual-mode-Zweipolfilter nach einem der Ansprüche 2-8,
dadurch gekennzeichnet,
daß die Kopplungselemente (9) lineare Koaxialantennen sind. - Dual-mode-Zweipolfilter nach einem der Ansprüche 2-8,
dadurch gekennzeichnet,
daß die Kopplungselemente (9) Koaxialschleifen sind. - Mehrpoliger Dual-mode-Filter
gekennzeichnet durch
wenigstens zwei Dual-mode-Zweipolfilter (1, 1) nach einem der Ansprüche 1 bis 10. - Mehrpoliger Dual-mode-Filter nach Anspruch 11,
dadurch gekennzeichnet,
daß halbkugelförmigen Dielektrika (3) nebeneinander angeordnet sind. - Mehrpoliger Dual-mode-Filter nach Anspruch 11 oder 12,
dadurch gekennzeichnet,
daß der Abstand der wenigstens zwei halbkugelförmigen Dielektrika (3) die Kopplung zwischen den beiden Resonatoren (1, 1) definiert.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19617698A DE19617698C1 (de) | 1996-05-03 | 1996-05-03 | Dual-mode-Zweipolfilter |
DE19617698 | 1996-05-03 | ||
PCT/DE1997/000857 WO1997042679A1 (de) | 1996-05-03 | 1997-04-26 | Dual-mode-mikrowellen-bandpassfilter aus hochgüteresonatoren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0896744A1 EP0896744A1 (de) | 1999-02-17 |
EP0896744B1 true EP0896744B1 (de) | 2000-05-31 |
Family
ID=7793177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97922878A Expired - Lifetime EP0896744B1 (de) | 1996-05-03 | 1997-04-26 | Dual-mode-mikrowellen-bandpassfilter aus hochgüteresonatoren |
Country Status (7)
Country | Link |
---|---|
US (1) | US6484043B1 (de) |
EP (1) | EP0896744B1 (de) |
JP (1) | JP2000509584A (de) |
CA (1) | CA2252659A1 (de) |
DE (2) | DE19617698C1 (de) |
ES (1) | ES2148978T3 (de) |
WO (1) | WO1997042679A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19824997C2 (de) * | 1998-06-05 | 2003-01-09 | Forschungszentrum Juelich Gmbh | Mehrpol-Bandpaßfilter mit elliptischer Filtercharakteristik |
DE19927798A1 (de) * | 1999-06-18 | 2001-01-04 | Forschungszentrum Juelich Gmbh | Dieelektrische Resonatorkonfiguration für Mikrowellen-Mehrpol-Bandpaßfilter |
DE10034338C2 (de) * | 2000-07-14 | 2002-06-20 | Forschungszentrum Juelich Gmbh | Mehrpoliges kaskadierendes Quardrupel-Bandpaßfilter auf der Basis dielektrischer Dual-Mode-Resonatoren |
US7068127B2 (en) * | 2001-11-14 | 2006-06-27 | Radio Frequency Systems | Tunable triple-mode mono-block filter assembly |
US7042314B2 (en) * | 2001-11-14 | 2006-05-09 | Radio Frequency Systems | Dielectric mono-block triple-mode microwave delay filter |
DE10353104A1 (de) * | 2003-11-12 | 2005-06-09 | Tesat-Spacecom Gmbh & Co.Kg | Anordnung zur Justage der Kopplung bei dielektrischen Filtern |
US6954122B2 (en) * | 2003-12-16 | 2005-10-11 | Radio Frequency Systems, Inc. | Hybrid triple-mode ceramic/metallic coaxial filter assembly |
DE102007027372A1 (de) * | 2007-06-11 | 2008-12-18 | Cognis Oleochemicals Gmbh | Verfahren zur Hydrierung von Glycerin |
DE102007027371A1 (de) * | 2007-06-11 | 2008-12-18 | Cognis Oleochemicals Gmbh | Verfahren zur Herstellung einer Verbindung aufweisend mindestens eine Ester-Gruppe |
US8111115B2 (en) * | 2008-07-21 | 2012-02-07 | Com Dev International Ltd. | Method of operation and construction of dual-mode filters, dual band filters, and diplexer/multiplexer devices using half cut dielectric resonators |
US8954125B2 (en) | 2011-07-28 | 2015-02-10 | International Business Machines Corporation | Low-loss superconducting devices |
US9138317B2 (en) | 2013-03-14 | 2015-09-22 | Osteoceramics, Inc | Conduits for enhancing tissue regeneration |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4489293A (en) * | 1981-05-11 | 1984-12-18 | Ford Aerospace & Communications Corporation | Miniature dual-mode, dielectric-loaded cavity filter |
JPS62204601A (ja) * | 1986-03-04 | 1987-09-09 | Murata Mfg Co Ltd | 二重モ−ドフイルタ |
DE69020195T2 (de) * | 1989-03-14 | 1995-11-30 | Fujitsu Ltd | Schaltung mit dielektrischem Resonator im TE01-Mode. |
US5179074A (en) * | 1991-01-24 | 1993-01-12 | Space Systems/Loral, Inc. | Hybrid dielectric resonator/high temperature superconductor filter |
US5324713A (en) * | 1991-11-05 | 1994-06-28 | E. I. Du Pont De Nemours And Company | High temperature superconductor support structures for dielectric resonator |
US5585331A (en) * | 1993-12-03 | 1996-12-17 | Com Dev Ltd. | Miniaturized superconducting dielectric resonator filters and method of operation thereof |
-
1996
- 1996-05-03 DE DE19617698A patent/DE19617698C1/de not_active Expired - Fee Related
-
1997
- 1997-04-26 CA CA002252659A patent/CA2252659A1/en not_active Abandoned
- 1997-04-26 ES ES97922878T patent/ES2148978T3/es not_active Expired - Lifetime
- 1997-04-26 US US09/180,160 patent/US6484043B1/en not_active Expired - Fee Related
- 1997-04-26 JP JP9539421A patent/JP2000509584A/ja active Pending
- 1997-04-26 WO PCT/DE1997/000857 patent/WO1997042679A1/de active IP Right Grant
- 1997-04-26 EP EP97922878A patent/EP0896744B1/de not_active Expired - Lifetime
- 1997-04-26 DE DE59701819T patent/DE59701819D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59701819D1 (de) | 2000-07-06 |
DE19617698C1 (de) | 1997-10-16 |
US6484043B1 (en) | 2002-11-19 |
EP0896744A1 (de) | 1999-02-17 |
ES2148978T3 (es) | 2000-10-16 |
WO1997042679A1 (de) | 1997-11-13 |
CA2252659A1 (en) | 1997-11-13 |
JP2000509584A (ja) | 2000-07-25 |
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