WO2006075439A1 - チューナブルフィルタ、デュプレクサおよび通信機装置 - Google Patents
チューナブルフィルタ、デュプレクサおよび通信機装置 Download PDFInfo
- Publication number
- WO2006075439A1 WO2006075439A1 PCT/JP2005/020810 JP2005020810W WO2006075439A1 WO 2006075439 A1 WO2006075439 A1 WO 2006075439A1 JP 2005020810 W JP2005020810 W JP 2005020810W WO 2006075439 A1 WO2006075439 A1 WO 2006075439A1
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- Prior art keywords
- cavity
- outer conductor
- filter
- conductor
- dielectric
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims description 5
- 239000004020 conductor Substances 0.000 claims abstract description 117
- 238000003780 insertion Methods 0.000 claims abstract description 22
- 230000037431 insertion Effects 0.000 claims abstract description 22
- 239000003989 dielectric material Substances 0.000 claims abstract description 5
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000005672 electromagnetic field Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000005684 electric field Effects 0.000 description 6
- 239000000523 sample Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 rare earth barium titanate compound Chemical class 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
Definitions
- Tunable filter, duplexer and communication device Tunable filter, duplexer and communication device
- the present invention relates to a tunable filter, a duplexer, and a communication device that use a cavity semi-coaxial resonator.
- Patent Document 1 discloses a tuning frequency variable bandpass filter.
- this filter one end is fixed at equal intervals on the side surface of the inner conductor rod of the semi-coaxial cavity resonator, is extended radially, bent downward at a substantially right angle,
- a plurality of shorting rods whose other ends are concentric with respect to the fixing position of the inner conductor on the bottom surface of the outer conductor, and each of the other ends of the plurality of shorting rods is fixed to the bottom surface of the outer conductor. Connected to the connected pin diode.
- the pin diode has an action of electrically connecting the shorting bar to the bottom surface of the outer conductor by an external control voltage, and each resonance is caused by a change in inductance component due to the shorting bar being short-circuited to the outer conductor. It is configured to control the frequency of the filter and change the tuning frequency of the filter.
- Patent Document 1 Japanese Patent Laid-Open No. 9-284097
- each invention of the present application is configured as follows.
- the invention according to claim 1 is an outer conductor having a plurality of cavity portions independent by partitions, and a surface fixed to the bottom surface of the cavity portion and facing the bottom surface of the cavity portion.
- a rod-shaped inner conductor that is not fixed; a frequency adjusting screw that is a conductor that is screwed to a surface that faces the bottom surface of the cavity portion or a side surface; an input / output connection means that is attached to the outer conductor;
- a cavity half-coaxial bandpass filter having a multi-stage configuration in which a coupling portion provided in a partition between adjacent cavity portions in the cavity portion and electromagnetic coupling between the steps is provided, each of the cavity portions
- a dielectric member held by a holding member movably provided on the outer conductor is inserted into the cavity portion, and each of the plurality of holding members has a protruding portion that protrudes outside the outer conductor.
- the plurality of protrusions are connected by a connecting member It is characterized in that is.
- the invention according to claim 2 is an outer conductor having a plurality of cavity portions independent by partitions, and a surface fixed to the bottom surface of the cavity portion and facing the bottom surface of the cavity portion.
- a transmission line comprising: a rod-shaped inner conductor that is not fixed; a frequency adjusting screw that is formed on a surface facing the bottom surface of the cavity portion or a conductor screwed on the side surface; and input / output means attached to the outer conductor.
- a cavity semi-coaxial band-stop filter that is electrically connected to the resonant electromagnetic field generated in each cavity and the transmission line, and is movable to an outer conductor in each of the cavity.
- a dielectric held by a holding member provided on the cavity is inserted into the cavity, and each of the plurality of holding members has a protruding portion that protrudes to the outer portion of the outer conductor, and a plurality of the protruding portions
- the parts are connected by a connecting member It is characterized by that.
- the invention according to claim 3 is the bandpass tunable filter according to claim 1, wherein the movable region of the dielectric in the predetermined cavity is a slit provided in the predetermined cavity. And an area other than a weight-like space area defined with an arbitrary point on the central axis of the inner conductor disposed in the predetermined cavity as an apex. To do.
- the invention according to claim 4 is the band-pass tunable filter according to claims 1 and 3, wherein the insertion amount of the dielectric material inserted into the cavity portion is different in each cavity portion. It is characterized by the provision of a mechanism that enables independent selection.
- the invention according to claim 5 is the band-pass tunable filter according to claim 2, wherein the amount of insertion of the dielectric material inserted into the cavity portion can be independently selected in each cavity portion. It is characterized in that a mechanism is provided.
- the invention according to claim 6 is a duplexer comprising at least two filters and means for connecting antennas commonly connected to the filters, wherein at least one of the filters is claimed. It is a bandpass tunable filter described in 1, 3 or 4.
- the invention according to claim 7 is connected to the duplexer according to claim 6, a transmission circuit connected to at least one input / output connection means of the duplexer, and the remaining input / output connection means And a communication device comprising an antenna connected to the antenna connection means of the duplexer.
- the position, angle, or both the position and angle of the dielectric inserted into the resonant cavity of the cavity semi-coaxial resonator with respect to the inner conductor are changed.
- perturbation is applied to the electric field generated in the resonant cavity, and the resonant frequency of each cavity can be changed.
- each dielectric holding member is connected by a connecting member, the frequency of each resonator can be changed simultaneously and the force can be changed quickly with the same amount of change.
- the amount of fluctuation of the connecting member can be set arbitrarily within the movable range, so the center frequency or band of the bandpass filter
- the center frequency of the stop band of the band stop filter can be arbitrarily set within the movable range, and a tunable filter with good response can be obtained.
- the amount of perturbation for each resonator can be varied using a cam structure or the like. For this reason, even when resonators having different resonant cavity shapes are made continuous, the amount of variation of the dielectric can be individually changed over each resonator. As a result, since a desired frequency fluctuation amount can be set for each resonator, it is possible to obtain a tunable filter in which the center frequency can be selected without deteriorating the filter characteristics.
- the dielectric tangent and the dielectric can be used to minimize the deterioration of the Q of the resonator itself. it can.
- no active element such as a pin diode is used for a resonant cavity in which a very strong current flows, the power durability of the filter is improved and the reliability is improved.
- the pin diode and the ground line associated therewith are improved. Therefore, it is possible to obtain a tunable filter that does not generate intermodulation distortion.
- the dielectric that varies the frequency is provided with a mechanism that allows the insertion amount to be appropriately selected for each cavity. Even when resonators with different cavity shapes or resonators with input / output mechanisms are attached to the filter, the perturbation amount of the resonance frequency is different even when the perturbation sensitivity of the resonance frequency with respect to changes in the dielectric position is different.
- the insertion amount of the dielectric can be adjusted in advance so as to be the same. This mechanism can also be used for fine adjustment of the frequency when adjusting the filter.
- FIG. 1 is an explanatory diagram for explaining a first embodiment of the present invention.
- FIG. 2 is an explanatory diagram for explaining a second embodiment of the present invention. 3] It is an explanatory view for explaining a third embodiment of the present invention.
- FIG. 5 is an explanatory diagram for explaining a fifth embodiment of the present invention.
- FIG. 6 is an explanatory diagram for explaining the variation of the characteristics of the passband filter according to the present invention. Explanation of symbols
- FIG. Fig. 1 (a) shows a plan view of a five-stage bandpass filter using the present invention, in which a part of the outer conductor lb is removed to illustrate the internal space.
- Fig. 1 (b) is a side view of Fig. 1 (a), and shows the internal space by removing a part of the outer conductor la.
- FIG. 1 (c) is a comparison diagram illustrating the state when the filter frequency is varied in comparison with FIG. 1 (b). The first embodiment will be described with reference to these drawings.
- the outer conductor la is a cavity having a cavity that is open on one side, and each cavity is partitioned by a partition lc.
- the outer conductor lb is formed of a plate-like member, and is screwed to the opening of the outer conductor la with a screw.
- Inner conductor 2 is fixed to the bottom surface of outer conductor la.
- the inner conductor 2 may be formed integrally with the outer conductor la, or the inner conductor 2 may be screwed to the bottom surface of the outer conductor la.
- the inner conductor 2 may be an elliptical cylinder or a polygonal cylinder illustrated as a cylinder.
- the inner conductor 2 is not fixed to the outer conductor lb on the opposite surface of the outer conductor la, and the frequency adjusting screw 4 formed by the conductor is screwed onto the outer conductor lb immediately above the inner conductor 2. It forms a cavity semi-coaxial resonator.
- the frequency adjusting screw 4 may be screwed into the side surface of the outer conductor la, which may be arranged at a place other than directly above the inner conductor 2.
- Each resonator has a slit 6 in which a part of the partition lc is opened in order to obtain electromagnetic coupling with the adjacent resonator. The opening of the slit 6 reaches the upper end surface of the partition lc.
- a coupling adjusting screw 5 formed of a conductor is screwed into the outer conductor lb and protrudes from the slit 6 portion.
- a coupling probe 7 for coupling to the input / output connector 3 is provided in the first-stage and final-stage resonators.
- the first embodiment operates as a five-stage bandpass filter.
- the number of stages of the filter is determined as a design item in consideration of desired characteristics.
- the outer conductor lb is provided with a long hole 32 for each cavity, and each holding member 8 is provided so as to be movable in the left-right direction of the drawing.
- One end of each holding member 8 protrudes to the outside of the outer conductor lb and is fixed to a flat connecting member 9.
- a dielectric rod 11 is attached to the other end of the holding member 8.
- the connecting member 9 and the holding member 8 can be appropriately selected from materials such as resin, metal, and ceramic.
- the dielectric rod 11 is fixed to the holding member 8 by bonding, press-fitting, pressing, mechanical fixing, or a combination thereof.
- the shape, length and dielectric constant of the dielectric rod 11 can be selected as appropriate.
- the shape of the dielectric rod 11 may be a circular column shape, an elliptic column shape, a polygonal column shape, a weight shape, or a plate shape.
- the connecting member 9 and the holding member 8 are made of conductive / resin or ceramic.
- the connecting member 9 is slidably attached to the surface of the outer conductor lb by a guide 10 fixed to the outer conductor lb so as to be slidable in the long side direction of the connecting member 9, and is slid to a desired position by the drive unit 12. It can be made.
- the drive unit 12 may be an electric drive method that slides the connecting member 9 in response to an external electric signal, an air pressure drive method, or a manual drive mode. .
- FIG. 1 (c) shows a state when the connecting member 9 is slid to the right side of the drawing.
- the dielectric rods 11 inserted in the resonators are all shifted to the right with respect to the inner conductor 2.
- the electric field density distribution in the resonator is denser as it is closer to the inner conductor 2 and becomes sparser as it is farther from the inner conductor 2.
- the dielectric rod 11 moves to the part where the electric field density is sparse compared to Fig. 1 (b).
- the perturbation to the electric field by the electric rod 11 decreases, and the frequencies of the resonators increase by almost the same amount all at once.
- the dielectric rod 11 can be set at a desired position within the movable range, the center frequency of the filter can be changed continuously rather than discretely.
- portions corresponding to the holding member 8, the connecting member 9, the guide 10, the dielectric rod 11, and the driving unit 12 in other drawings are referred to as a tuning system.
- FIG. 2 (a) shows a plan view of a five-stage bandpass filter using the present invention.
- the connecting member 14 includes a plurality of guide holes 17 parallel to the longitudinal direction and a plurality of flat cams 16 (oblique grooves) provided at a predetermined angle with respect to the longitudinal direction.
- the connecting member 14 is slidably attached in the longitudinal direction of the filter by inserting guide pins 15 having flanges into the respective guide holes 17 and fixing the guide pins 15 to the surface of the outer conductor lb. Yes.
- FIG. 2 (c) An enlarged view of part A from which a part of the connecting member 14 has been removed is shown in FIG. 2 (c), and a BB cross section in this enlarged view is shown in FIG. 2 (d).
- the holding member 13 has a collar 13a, is provided in a long hole having a recess provided in the outer conductor lb, is movable with respect to the outer conductor lb, and functions as a cam follower.
- the protrusion from the outer conductor lb of the holding member 13 attached as described above is inserted into the flat cam 16.
- a dielectric rod 11 is fixed to the holding member 13 as in the first embodiment.
- FIG. 2 (b) shows a view in which the connecting member 14 is slid in the left direction in the drawing.
- the connecting member 14 can be slid to a desired position by the driving unit 12.
- the holding member 13 is moved by a flat cam 16 provided on the connecting member 14. Since the holding member 13 is restrained from moving in the horizontal direction of the drawing by the cam follower, the horizontal movement of the connecting member 14 is converted into the vertical movement of the holding member 13 by the flat cam 16, and the dielectric rod
- the distance between 11 and inner conductor 2 changes. In the example in Fig. 2 (b), the dielectric rod 11 is closer to the inner conductor than in Fig. 2 (a)!
- the angle of the flat cam 16 with respect to the central axis of the connecting member 14 is made different in each resonator so that the holding member 13 slides in the vertical direction of the drawing when the connecting member 14 slides left and right in the drawing. Can be varied for each resonator. If it is necessary to vary the frequency perturbation amount for each resonator, the angle of the flat cam 16 may be determined appropriately.
- the connecting member 14 is in the position shown in FIG. 2 (a)
- the connecting member 14 is the guide pin 15
- the center frequency of the filter can be selected in the range of about 150MHz.
- the material of the connecting member 14, the material of the holding member 13, and the shape of the dielectric rod 11 are the same as those described in the first embodiment.
- FIG. 3 (a) shows a plan view of a five-stage bandpass filter using the present invention.
- FIG. 3 (b) is a side view of FIG. 3 (a), in which a part of the side wall of the outer conductor la is removed to illustrate the internal space.
- Fig. 3 (c) shows an enlarged view of the cc cross section in Fig. 3 (b).
- the connecting member 19 has a cylindrical shape, is held by a guide 20 fixed to the outer conductor lb, and is rotatably attached to the cross-sectional center of the connecting member 19.
- the outer conductor lb has a long hole 32 for each cavity, and each holding member 18 is provided so as to be movable in the vertical direction of the drawing.
- One end of the holding member 18 protrudes outside the outer conductor lb and is fixed to the connecting member 19.
- a dielectric rod 11 is attached to the other end of the holding member 18.
- the electrolytic density in the vicinity of the inner conductor is higher, so when the dielectric rod 11 approaches the inner conductor 2, the frequency of the resonator decreases.
- the frequency of the resonator increases when it is separated. Since this operation is performed simultaneously for each resonator, the filter center frequency can be tuned while maintaining its waveform.
- the dimension of the inner space formed by the outer conductors la and lb of the resonator is a 45 mm cubic shape and the inner conductor 2 is a cylindrical shape having a diameter of 12 mm
- no load is applied to the resonator.
- Q is about 4800.
- the deterioration of unloaded Q when a cylindrical dielectric rod 11 with a relative dielectric constant of 92, 2 GHz, a dielectric tangent of 0.005, a diameter of 5 mm, and a length of 20 mm made of a rare earth barium titanate compound is inserted is The deterioration of insertion loss when the filter is configured is about 3%.
- the insertion loss of this filter is approximately 0.6 dB when the tuning system is not used. When configured, the insertion loss is 0.62 dB, and the amount of degradation of the insertion loss is negligible.
- a band-pass tunable filter having very good characteristics can be configured without degradation of performance resistance and generation of intermodulation distortion due to the configuration of the tuning system.
- FIG. 4 (a) is a plan view of a five-stage bandstop filter using the present invention, in which a part of the outer conductor 22b is removed to illustrate the inner space.
- Fig. 4 (b) is a side view of Fig. 1 (a), and illustrates the internal space by removing a part of the outer conductor 22a.
- Fig. 4 (c) shows an enlarged view of the dd section in Fig. 4 (b).
- the inner conductor 23 is fixed to the bottom surface of the outer conductor 22a.
- the inner conductor 23 may be formed integrally with the outer conductor 22a, or the inner conductor 23 may be screwed to the bottom surface of the outer conductor 22a.
- the inner conductor 23 is illustrated as a cylinder, it may be a polygonal column.
- the inner conductor 23 is not fixed to the outer conductor 22b on the opposite surface of the outer conductor 22a, and a frequency adjusting screw 25 formed by the conductor is screwed into the outer conductor 22b immediately above the inner conductor 23.
- a cavity semi-coaxial resonator is formed.
- the frequency adjusting screw 25 may be screwed into the side surface of the outer conductor 22a which may be disposed at a place other than directly above the inner conductor 23. Although not shown, the outer conductor 22b and the outer conductor 22c are screwed to the outer conductor 22a with screws.
- Each resonator forms a completely closed space, and each inner conductor 23 is provided with coupling probes 26a and 26b for coupling to the center conductor 24 of the transmission line provided on the side surface of the outer conductor 22a. It has been.
- Each of the coupling probes 26a and 26b has different forces or different shapes in the attachment position to the inner conductor 23 in order to obtain a desired coupling amount. The same applies to the resonator whose inside is illustrated.
- the central conductor 24 is provided in a cylindrical cavity provided in the outer conductors 22a and 22c, forms a transmission line with an impedance of 50 ⁇ , and each end is connected to the input / output connector 34.
- the fourth embodiment operates as a five-stage band rejection filter.
- the number of stages of the filter is determined as a design item in consideration of desired characteristics.
- FIG. Fig. 5 (a) shows a plan view of a five-stage bandpass filter, and shows the internal space by removing a part of the upper panel.
- FIG. 5 (b) is a side view of FIG. 5 (a), and the entire space is shown with the entire side surface removed.
- This embodiment is a modification of the first embodiment, and the basic configuration of the filter and the configuration of the tuning system are the same as those of the first embodiment.
- FIG. 5 (b) shows a diagram in which the insertion amount of the holding member 8 is different for each resonator.
- the position of the dielectric rod 11 in each resonator depends on the difference in the size of the slit 6, the insertion amount of the frequency adjustment screw 8, and the insertion amount of the coupling adjustment screw 5.
- the amount of frequency shift due to the change may be different.
- the insertion amount of the dielectric rod 11 is intentionally varied for each resonator. Note that the amount of insertion of the dielectric rod 11 is obtained experimentally.
- the insertion amount of the dielectric rod 11 is the same for all resonators.
- the connecting member 9 is slid so that the dielectric rod 11 is positioned farthest from the central conductor 2.
- the amount of insertion of the dielectric rod 11 does not greatly affect the frequency of the resonator.
- the frequency adjusting screw 4 and the coupling adjusting screw 5 are used to adjust the filter to a predetermined characteristic (characteristic that the center frequency of the passband of the tunable filter is the highest and becomes a state).
- the connecting member 9 is slid so that the dielectric rod 11 and the central conductor 2 are closest to each other. At this time, if the shift amounts of the resonance frequencies of the resonators are all equal, the pass band of the filter is changed to a state in which only the center frequency is maintained so that the characteristics (pass band shape) are not destroyed.
- the characteristic is corrected by adjusting the insertion amount of the dielectric rod 11.
- the characteristics when the center frequency of the passband of the filter is the highest and the lowest are matched with the desired characteristics.
- the filter adjusted by this method does not lose its characteristic even when the center frequency is set to an arbitrary value between the highest point and the lowest point, and a good band-pass tunable filter can be realized.
- the frequency is normally adjusted using the frequency adjusting screw 4, but the insertion amount of the dielectric rod 11 is adjusted in order to adjust the subtle frequency deviation in the final stage of the adjustment. Do it! /
- the fifth embodiment is shown as an example of a band pass filter, it can also be applied to the band rejection filter shown in the fourth embodiment.
- all the embodiments may have a plurality of tuning systems.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112005001053.8T DE112005001053B4 (de) | 2005-01-11 | 2005-11-14 | Abstimmbarer Filter, Duplexer und Kommunikationsvorrichtung |
JP2006552847A JP4178264B2 (ja) | 2005-01-11 | 2005-11-14 | チューナブルフィルタ |
CN2005800181275A CN1965439B (zh) | 2005-01-11 | 2005-11-14 | 可调谐滤波器,天线共用器和通信设备 |
US11/553,672 US7439828B2 (en) | 2005-01-11 | 2006-10-27 | Tunable filter, duplexer and communication apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005004146 | 2005-01-11 | ||
JP2005-004146 | 2005-01-11 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/553,672 Continuation US7439828B2 (en) | 2005-01-11 | 2006-10-27 | Tunable filter, duplexer and communication apparatus |
Publications (1)
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WO2006075439A1 true WO2006075439A1 (ja) | 2006-07-20 |
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Family Applications (1)
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PCT/JP2005/020810 WO2006075439A1 (ja) | 2005-01-11 | 2005-11-14 | チューナブルフィルタ、デュプレクサおよび通信機装置 |
Country Status (5)
Country | Link |
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US (1) | US7439828B2 (ja) |
JP (1) | JP4178264B2 (ja) |
CN (1) | CN1965439B (ja) |
DE (1) | DE112005001053B4 (ja) |
WO (1) | WO2006075439A1 (ja) |
Cited By (4)
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KR100887213B1 (ko) | 2007-08-28 | 2009-03-06 | 주식회사 에이스테크놀로지 | 주파수 튜너블 필터 |
KR100896194B1 (ko) | 2007-08-28 | 2009-05-12 | 주식회사 에이스테크놀로지 | 주파수 튜너블 필터 |
WO2010150815A1 (ja) | 2009-06-23 | 2010-12-29 | 日本電気株式会社 | チューナブル帯域通過フィルタ |
WO2014064911A1 (ja) | 2012-10-23 | 2014-05-01 | 日本電気株式会社 | チューナブル帯域通過フィルタ |
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KR100769657B1 (ko) * | 2003-08-23 | 2007-10-23 | 주식회사 케이엠더블유 | 무선 주파수 대역 가변 필터 |
KR100985717B1 (ko) * | 2008-02-19 | 2010-10-06 | 주식회사 에이스테크놀로지 | 슬라이딩 방식을 이용한 주파수 튜너블 필터 |
KR101045498B1 (ko) * | 2008-08-07 | 2011-06-30 | 주식회사 에이스테크놀로지 | 튜닝 특성 조절이 가능한 튜너블 필터 |
US7915978B2 (en) * | 2009-01-29 | 2011-03-29 | Radio Frequency Systems, Inc. | Compact tunable dual band stop filter |
CN201562744U (zh) * | 2009-05-19 | 2010-08-25 | 武汉凡谷电子技术股份有限公司 | 一种可调滤波器 |
KR101009276B1 (ko) | 2009-07-20 | 2011-01-18 | 주식회사 에이스테크놀로지 | 안정적인 슬라이딩 구조의 튜너블 필터 |
CN101640300B (zh) * | 2009-08-24 | 2012-11-21 | 华为技术有限公司 | 电调滤波器 |
KR101237227B1 (ko) | 2010-09-06 | 2013-02-26 | 주식회사 에이스테크놀로지 | 슬라이딩 방식을 이용한 주파수 튜너블 필터 |
US9570222B2 (en) | 2013-05-28 | 2017-02-14 | Tdk Corporation | Vector inductor having multiple mutually coupled metalization layers providing high quality factor |
CN103474730B (zh) * | 2013-09-26 | 2015-04-22 | 西安空间无线电技术研究所 | 一种同轴输出滤波器的设计方法 |
US9735752B2 (en) | 2014-12-03 | 2017-08-15 | Tdk Corporation | Apparatus and methods for tunable filters |
DE102015006368A1 (de) | 2015-05-20 | 2016-11-24 | Mician Global Engineering Gbr | Bandpassfilter mit einem Hohlraumresonator und Verfahren zum Betreiben, Einstellen oder Herstellen eines solchen Bandpassfilters |
KR102324960B1 (ko) | 2015-06-25 | 2021-11-12 | 삼성전자 주식회사 | 통신 장치 및 이를 포함하는 전자 장치 |
WO2023237183A1 (en) | 2022-06-07 | 2023-12-14 | Christian-Albrechts-Universität Zu Kiel | Tunable resonator arrangement, tunable frequency filter and method of tuning thereof |
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- 2005-11-14 CN CN2005800181275A patent/CN1965439B/zh not_active Expired - Fee Related
- 2005-11-14 DE DE112005001053.8T patent/DE112005001053B4/de not_active Expired - Fee Related
- 2005-11-14 WO PCT/JP2005/020810 patent/WO2006075439A1/ja not_active Application Discontinuation
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2006
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100887213B1 (ko) | 2007-08-28 | 2009-03-06 | 주식회사 에이스테크놀로지 | 주파수 튜너블 필터 |
KR100896194B1 (ko) | 2007-08-28 | 2009-05-12 | 주식회사 에이스테크놀로지 | 주파수 튜너블 필터 |
WO2010150815A1 (ja) | 2009-06-23 | 2010-12-29 | 日本電気株式会社 | チューナブル帯域通過フィルタ |
US8878635B2 (en) | 2009-06-23 | 2014-11-04 | Nec Corporation | Tunable band-pass filter |
WO2014064911A1 (ja) | 2012-10-23 | 2014-05-01 | 日本電気株式会社 | チューナブル帯域通過フィルタ |
JP2014086839A (ja) * | 2012-10-23 | 2014-05-12 | Nec Engineering Ltd | チューナブル帯域通過フィルタ |
US9786974B2 (en) | 2012-10-23 | 2017-10-10 | Nec Corporation | Tunable band-pass filter |
Also Published As
Publication number | Publication date |
---|---|
CN1965439A (zh) | 2007-05-16 |
US20070052495A1 (en) | 2007-03-08 |
JP4178264B2 (ja) | 2008-11-12 |
US7439828B2 (en) | 2008-10-21 |
DE112005001053B4 (de) | 2015-04-16 |
JPWO2006075439A1 (ja) | 2008-06-12 |
CN1965439B (zh) | 2012-10-24 |
DE112005001053T5 (de) | 2007-05-10 |
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