EP0900453A1 - Resonators for high power high temperature superconducting devices - Google Patents
Resonators for high power high temperature superconducting devicesInfo
- Publication number
- EP0900453A1 EP0900453A1 EP97926580A EP97926580A EP0900453A1 EP 0900453 A1 EP0900453 A1 EP 0900453A1 EP 97926580 A EP97926580 A EP 97926580A EP 97926580 A EP97926580 A EP 97926580A EP 0900453 A1 EP0900453 A1 EP 0900453A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- high temperature
- resonator
- temperature superconductor
- hts
- resonators
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/08—Strip line resonators
- H01P7/082—Microstripline resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/08—Strip line resonators
Definitions
- Filter banks and multiplexers are widely used in telecommunications as channelizers, which separate or combine the incoming signals according to their frequencies.
- the basic building block of filters banks and multiplexers is a filter, which comprises a number of resonators as the frequency selecting element.
- the filters need to have narrow bandwidth, accurate center frequency, low insertion loss in the in-band, high rejection in the off-band, steep skirts at the edges of the in-band. compact size and high power handling capability.
- Conventional filters made from normal conductors are not well suited for telecommunication uses because of the high loss in the normal conductors.
- the center frequency accuracy is another important requirement, particularly for a narrow band filter. This is especially true for the filters in the so called “contiguous" multiplexer, such as that described in Zhi-Yuan Shen, supra at page 120, and in a multi-pole filter, where loss of center frequency accuracy will severely degrade performance.
- the frequency of HTS resonators in a filter may deviate from the design value due to circuit fabrication tolerances and the uncontrollable variations in the substrate such as the thickness changes or "twin boundary.” See Zhi-Yuan Shen, supra at 12.
- the invention comprises TMoiO mode planar high temperature superconductor resonator, where i is a whole integer >1, comprising a shaped high temperature superconductor film and at least one high temperature superconductor ground plate deposited on opposite sides of at least one dielectric substrate; wherein the shaped high temperature superconductor film has an aperture in the center thereof and has a shape selected from the group consisting of a circle and a polygon.
- the resonators comprise a single ground plate and a single dielectric substrate.
- a strip line form two substrates, each having a ground plate deposited thereon, are used and the shaped high temperature superconductor film is sandwiched between the substrates to form resonator having a ground plate/substrate/HTS film/substrate/ground plate structure.
- the resonators are particularly useful in frequency tuning, that is, changing the resonator frequency to optimize the performance of the filter and in providing jump-over coupling between next-to-adjacent resonators for filters with elliptical frequency response.
- Figure 2(a) - 2(c) are graphic representations of the current and the magnetic field distributions of the resonators of this invention operating in the TMoiO mode , TM020 mode, and TM ⁇ 30 mode as shown in Figure 2(a), Figure 2(b), and Figure 2(c), respectively.
- Figure 3(a) - 3(c) are graphic representations of the current and the magnetic field distributions of a typical prior art circular-shape resonator, operating in the
- TMoiO mode TM020 mode
- TM03O mode as shown in Figure 3(a), Figure 3(b), and Figure 3(c), respectively.
- Figure 4(a) - 4(b) are schematic illustrations of another embodiment of the resonator of this invention in the strip line configuration, in which Figure 4(a) shows the A-A cut view and Figure 4(b) shows the cross sectional view.
- Figure 5(a) - 5(b) are schematic illustrations of an octagon shape HTS planar resonator of this invention in the microstrip line configuration, in which Figure 5(a) shows the front view and Figure 5(b) shows the cross sectional view.
- Figure 6(a) - 6(b) are schematic illustrations of another embodiment of the octagon shape resonator of this invention in the strip line configuration, in which Figure 6(a) shows the A-A cut view and Figure 6(b) shows the cross sectional view.
- Figure 7(a) - 7(c) are schematic illustrations of a 3-pole HTS filter having a TMoiO mode resonator of this invention as a frequency tuning device, in which Figure 7(a) shows the front view, Figure 7(b) shows cross sectional view, and Figure 7(c) shows the back view.
- Figure 8(a) - 8(f) are schematic illustrations of a 3-pole HTS filter in the stacked form having a TMoiO mode resonator of this invention for jump-over coupling between non-adjacent resonators, in which Figure 8(a) shows the cross sectional view, and Figure 8(b), 8(c), 8(d), 8(e), and 8(f) show the B-B, C-C, D-D, E-E. and F-F cut views, respectively.
- Figure 9(a) -9(b) are schematic illustrations of a high power 3-pole HTS filter having a TMoiO mode resonator of this invention as a frequency tuning device, in which Figure 9(a) is a front view thereof and Figure 9(b) is a back view thereof.
- Figure 10 is a graph of the S2 1 versus frequency response curves for the HTS filter of Figure 9(a) -9(b) at six different transmitting power levels.
- the present invention comprises a planar TMoiO mode (where i is a whole integer >1 ) HTS resonator comprising a circular or polygonal HTS film, the film having a centrally located aperture and at least one ground plate deposited on at least one substrate.
- Circular and octogon shapes are preferred for the HTS film.
- the aperture can be circular or polygonal and need not be the same shape as the HTS film.
- the term "circular” as used herein is not to be understood to require a perfect circle. Rather, imperfect circles; that is, circles in which differences in the diameter of the circle are less than 1%, are also included.
- the term "polygon” is to be understood to mean any equal side and equal angle polygons having at least five sides.
- a resonator of this invention is illustrated schematically and comprises a circular HTS film 21 having a central aperture 24 therein and an HTS ground plate 23 deposited on opposite sides of a substrate 22.
- the HTS materials used for the HTS film and the HTS ground plate are preferably selected from high temperature superconductors with a transition temperature greater than 80°K and a conductivity one hundred time greater than pure copper. YBa 2 Cu-)0 7- g, and
- the substrate may be any dielectric substrate commonly employed in HTS devices. Most preferred are dielectric materials with a loss tangent less than 10 -3 .
- FIG 2(a) graphic representations of the radial direction current Jp and the circular direction magnetic field H ⁇ as functions of the radial distance p from the center of the resonator of this invention operating in the TMoiO mode ( Figure 2(a)), TM020 mode ( Figure 2(b)), and TM ⁇ 30 mode ( Figure 2(c)).
- Circular planar HTS TMoiO mode resonators where i is a whole integer > 1 , are known in the art.
- Figure 3(a) - 3(c) are graphic representations of the radial direction current Jp and the circular direction magnetic field H ⁇ as functions of the radial distance p from the center of a typical circular HTS resonator of the prior art operating in the TMoiO mode , TM020 mode, and TM030 mode, shown in Figure 3(a), Figure 3(b), and Figure 3(c), respectively.
- Figure 4(a) - 4(b) show another embodiment of the circular resonator in the strip line configuration.
- the resonator in this embodiment comprises a circular HTS film 31 having a central aperture 34 therein sandwiched between substrates 32a, 32b, each substrate further comprising an HTS ground plate 33a, 33b, respectively.
- Figure 5(a) - 5(b) illustrate an embodiment of the resonators of this invention, wherein an octoganal HTS film 51 having an octoganal central aperture 54 therein and an HTS ground plate 53 are deposited on opposite sides of a substrate 52.
- the resonator comprises an octogonal HTS film 61 having an octogonal aperture 64 therein sandwiched between two substrates 62a and 62b, each substrate 62a, 62b having an ground plate 63a, 63b, respectively, deposited thereon.
- FIG. 7 illustrates a TMoiO mode HTS high power 3-pole filter incorporating a resonator of this invention therein.
- the 3-pole filter comprises a substrate 70 having a plurality of HTS films 72a, 73, 72b deposited on one side thereof and an HTS ground plate 71 deposited on the opposite side thereof (see Figure 7(b)).
- films 72a and 72b represent prior art circular HTS resonators and film 73, having central aperture 74 therein, represents a resonator of this invention.
- the input coupling circuit for the filter comprises an opening 75a in the ground plate 71 to provide room for the remaining coupling circuits, an input center line 76a in the coplanar line form, and a branch line 77a coupled to resonator 72a.
- the output coupling circuit comprises an opening 75b in the ground plate 71 to provide room for the remaining coupling circuits, an output center line 76b in the coplanar line form, and a branch line 77b coupled to resonator 72b.
- the inter-resonator coupling circuits comprises two openings 78a and 78b in the ground plate 71, and two coupling center lines 79a and 79b in the coplanar line form to provide coupling resonator 72a to resonator 73, and resonator 73 to resonator 72b, respectively.
- the resonant frequency of three resonators comprising the filter must be precisely equal to their designed values.
- the resonant frequency can vary due to many uncontrollable factors. Therefore, it is very desirable to have some means to tune the resonant frequency of individual resonator. It is known, for example, that changing the radius of a prior art circular HTS resonator will chnage its frequency, but it is very difficult to change the radius, and thus tune the frequency, of a circular resonator after it has been fabricated.
- the resonator of this invention comprises means for tuning the resonant frequency of the filter.
- the frequency of a circular resonator, according to the present invention can readily be increased by providing an aperture in the center of the resonator. This can be readily accomplished by use of a high power laser, photolithographic etching, or shadow mask etching.
- the 3-pole filter is divided into three sections: the input section, the middle section and the output section.
- the input section comprises an HTS circuit (see Figure 8(b)) sandwiched between substrate 80a (having ground plate 81a deposited on one side thereof) and substrate 80b.
- the HTS circuit comprises a circular HTS resonator 82a and an input coupling circuit 83a deposited on substrate 80b.
- the middle section comprises the HTS circuit pattern shown in Figure 8(d) sandwiched between two substrates, 80c, 80d.
- the circuit pattern for the middle section, shown in Figure 8(d) comprises an HTS resonator 84 having aperture 85 in the center thereof and a circular HTS dot 86 concentric with aperture 85 and resonator 84 deposited on substrate 80d.
- the output section comprises an HTS circuit (see Figure 8(f)) sandwiched between substrates 80f (having ground plate 81b deposited on one side thereof) and substrate 80e.
- the HTS circuit for the output section shown in Figure 8(f)
- the HTS ground plate 87a having center coupling means 88a separates the input section and middle section.
- a simliar ground plate 87b having center coupling means 88b separates the middle section and the output section.
- ground plate 87a has shared functionality between the input section and the middle section and ground plate 87b has shared functionality between the middle section and the output section.
- Coupling means 88a provides coupling between resonator 82a and resonator 84
- coupling means 88b provides coupling between resonator 84 and resonator 82b.
- coupling means 88a and 88b, together with aperture 85 in resonator 84, provide coupling between resonator 82a and resonator 82b. as explained more fully below.
- the resonator 84 having central aperture 85 comprises means for coupling between resonator 82a and resonator 82b.
- coupling is aptly referred to as “jump-over” coupling because resonators 82a and 82b are not adjacent to one another, but in fact are separated by intermediate resonator 84.
- coupling from resonator 82a to resonator 82b requires a “jump” over the intermediate resonator 84.
- This "jump-over" coupling application of the present invention is particularly advantageous for use in elliptical frequency response filters, which in turn have the advantage of having very steep skirts.
- the electromagnetic fields are confined within the area of the HTS film 84 and the central aperture 85 provides a space free of electromagnetic fields, which can be used as the space for the "jump-over" coupling between resonators 82a and 82b, through the coupling means 88a on ground plate 87a (see Figure 8(c)) and coupling means 88b on ground plates 87b (see Figure 8(e)).
- the concentric HTS dot 86 in aperture 85 provides another dimension to vary the coupling strength among these resonators.
- the coupling strength between and among resonator 82a, 84 and 82b can be adjusted by varying the diameter of coupling means 88a and 88b, the aperture 85, and the HTS dot 86.
- a high power 3-pole TMoiO mode HTS filter was prepared by depositing double- sided Tl 2 Ba 2 CaCu 2 ⁇ 8 HTS thin films on both sides of a 40.8 mm x 17.2 mm x 0.508 mm LaA10 3 substrate.
- a filter having the structure shown in Figure 9(a) and 9(b) was prepared, in which 90 is the substrate; 91a and 91b are octagonal shaped resonators; 92 is an octagonal shaped resonator having a central aperture 93 therein; 94 is the ground plate; opening 95a, coplanar center line 96a and T-type coupling branch line 97a collectively form the input coupling circuit; opening 95b, coplanar center line 96b and T-type coupling branch line 97b collectively form the output coupling circuit; and openings 98a and 98b comprise the inter-resonator coupling circuits.
- the filter was housed in a copper case with SMA compatible input and output connectors and the filter was tested at 77°K.
- the diameter of central aperture 93 in resonator 92 was increased (using photolithography ion beam milling) in 24- micron incriments until optimum performance was obtained.
- the filter was then tested at power levels of 1.7 watts, 20 watts. 40 watts, 50 watts 62 watts and 74 watts.
- the measured S? ⁇ versus frequency response curves at all six power levels are shown in Figure 10. As seen in Figure 10. the six curves lay on top of one another without notable performance degradation, even in the fine vertical scale of ldB/Div.
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1808896P | 1996-05-22 | 1996-05-22 | |
US18088P | 1996-05-22 | ||
US790971 | 1997-01-30 | ||
US08/790,971 US5914296A (en) | 1997-01-30 | 1997-01-30 | Resonators for high power high temperature superconducting devices |
PCT/US1997/008411 WO1997044852A1 (en) | 1996-05-22 | 1997-05-16 | Resonators for high power high temperature superconducting devices |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0900453A1 true EP0900453A1 (en) | 1999-03-10 |
EP0900453B1 EP0900453B1 (en) | 2001-09-12 |
Family
ID=26690717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97926580A Expired - Lifetime EP0900453B1 (en) | 1996-05-22 | 1997-05-16 | Resonators for high power high temperature superconducting devices |
Country Status (14)
Country | Link |
---|---|
EP (1) | EP0900453B1 (en) |
JP (1) | JP2000511375A (en) |
KR (1) | KR20000015929A (en) |
CN (1) | CN1149706C (en) |
AT (1) | ATE205640T1 (en) |
CA (1) | CA2255648A1 (en) |
DE (1) | DE69706673T2 (en) |
DK (1) | DK0900453T3 (en) |
ES (1) | ES2163168T3 (en) |
GR (1) | GR3036898T3 (en) |
HK (1) | HK1019514A1 (en) |
PT (1) | PT900453E (en) |
TW (1) | TW426227U (en) |
WO (1) | WO1997044852A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19821382A1 (en) | 1998-05-13 | 1999-11-25 | Bosch Gmbh Robert | Method for adjusting the resonance frequency of a ring resonator |
JP5029519B2 (en) * | 2008-07-08 | 2012-09-19 | 富士通株式会社 | filter |
CN101728612A (en) * | 2009-12-29 | 2010-06-09 | 中国电子科技集团公司第十六研究所 | C waveband frequency divider |
CN103700919B (en) * | 2014-01-18 | 2016-09-28 | 成都顺为超导科技股份有限公司 | Resonator, resonator are for wave filter, wave filter and resonator design method |
CN108695580B (en) * | 2017-04-10 | 2019-10-18 | 南京理工大学 | A kind of octagonal super wide band microstrip filter based on defect ground structure |
CN110970698B (en) * | 2019-12-20 | 2021-11-05 | 济南腾铭信息科技有限公司 | Superconducting coupling structure |
CN112563700B (en) * | 2020-08-13 | 2022-01-04 | 中国科学院国家天文台 | Submillimeter wave multi-band imaging superconducting band-pass filter array system and implementation method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6014503A (en) * | 1983-07-05 | 1985-01-25 | Nec Corp | Triplate-type band-pass filter |
JPS61251203A (en) * | 1985-04-29 | 1986-11-08 | Nec Corp | Tri-plate band-pass filter |
JPH04351103A (en) * | 1991-05-29 | 1992-12-04 | Sumitomo Electric Ind Ltd | Microwave resonator |
JPH05335834A (en) * | 1992-05-29 | 1993-12-17 | Kyocera Corp | Oscillation circuit |
EP1026772B1 (en) * | 1994-06-17 | 2003-03-26 | Matsushita Electric Industrial Co., Ltd. | High-frequency circuit element |
-
1997
- 1997-05-16 CA CA002255648A patent/CA2255648A1/en not_active Abandoned
- 1997-05-16 EP EP97926580A patent/EP0900453B1/en not_active Expired - Lifetime
- 1997-05-16 KR KR1019980709483A patent/KR20000015929A/en not_active Application Discontinuation
- 1997-05-16 AT AT97926580T patent/ATE205640T1/en not_active IP Right Cessation
- 1997-05-16 CN CNB971948682A patent/CN1149706C/en not_active Expired - Fee Related
- 1997-05-16 DE DE69706673T patent/DE69706673T2/en not_active Expired - Fee Related
- 1997-05-16 JP JP09542608A patent/JP2000511375A/en not_active Ceased
- 1997-05-16 DK DK97926580T patent/DK0900453T3/en active
- 1997-05-16 PT PT97926580T patent/PT900453E/en unknown
- 1997-05-16 WO PCT/US1997/008411 patent/WO1997044852A1/en not_active Application Discontinuation
- 1997-05-16 ES ES97926580T patent/ES2163168T3/en not_active Expired - Lifetime
- 1997-05-22 TW TW088203218U patent/TW426227U/en not_active IP Right Cessation
-
1999
- 1999-10-11 HK HK99104477A patent/HK1019514A1/en unknown
-
2001
- 2001-10-16 GR GR20010401768T patent/GR3036898T3/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9744852A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1220031A (en) | 1999-06-16 |
TW426227U (en) | 2001-03-11 |
JP2000511375A (en) | 2000-08-29 |
EP0900453B1 (en) | 2001-09-12 |
KR20000015929A (en) | 2000-03-15 |
HK1019514A1 (en) | 2000-02-11 |
ES2163168T3 (en) | 2002-01-16 |
DE69706673D1 (en) | 2001-10-18 |
PT900453E (en) | 2002-02-28 |
GR3036898T3 (en) | 2002-01-31 |
WO1997044852A1 (en) | 1997-11-27 |
DE69706673T2 (en) | 2002-06-20 |
CN1149706C (en) | 2004-05-12 |
CA2255648A1 (en) | 1997-11-27 |
ATE205640T1 (en) | 2001-09-15 |
DK0900453T3 (en) | 2001-10-29 |
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