WO2006098093A1 - 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサ、及び通信機装置 - Google Patents
高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサ、及び通信機装置 Download PDFInfo
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- 239000000203 mixture Substances 0.000 title claims abstract description 45
- 229910052573 porcelain Inorganic materials 0.000 title claims abstract description 12
- 238000004891 communication Methods 0.000 title claims description 13
- 150000001875 compounds Chemical class 0.000 claims abstract description 3
- 239000000919 ceramic Substances 0.000 claims description 34
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 229910052715 tantalum Inorganic materials 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 229910052779 Neodymium Inorganic materials 0.000 claims description 4
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 4
- 229910052772 Samarium Inorganic materials 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- 238000010304 firing Methods 0.000 abstract description 21
- 239000011575 calcium Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000010955 niobium Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 239000011777 magnesium Substances 0.000 description 6
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- 239000002184 metal Substances 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- 150000002910 rare earth metals Chemical class 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910016006 MoSi Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 101100513612 Microdochium nivale MnCO gene Proteins 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium(II) oxide Chemical compound [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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Definitions
- High frequency dielectric ceramic composition dielectric resonator, dielectric filter, dielectric duplexer, and communication device
- the present invention relates to a dielectric ceramic composition for high frequency used in a high frequency region such as a microwave and a millimeter wave, as well as a dielectric resonator, a dielectric filter, an dielectric duplexer configured using the same, And a communication device.
- Dielectric ceramics are widely used as materials constituting dielectric resonators, circuit boards, and the like in high frequency regions such as microwaves and millimeter waves.
- Dielectric porcelain force for such high frequency applications particularly when used for applications such as dielectric resonators and dielectric filters, the required dielectric characteristics are as follows: (1) Wavelength force of electromagnetic wave S1Z ( E 1/2 ), the dielectric constant ( ⁇ ) is high in response to the demand for miniaturization, (2) the dielectric loss is small, that is, the Q value is high, and (3) the resonance frequency F is excellent in temperature stability, that is, the temperature coefficient of resonance frequency ( ⁇ ) is around OppmZ ° C.
- a dielectric ceramic composition for high frequency that can satisfy the above-mentioned requirements, for example, a CaTiO—Ca ⁇ Mg (Nb, Ta) ⁇ 0—LnAlO system described in Patent Document 1 (however, Ln
- O-LnAlO system (where Ln is a rare earth element), etc.
- Patent Document 1 JP 2001-163665
- Patent Document 2 JP 2001-192265 A Disclosure of the invention
- the dielectric ceramic composition having the composition system described in Patent Document 1 and Patent Document 2 that have been used in the past has a high Q value (1 GHz) force S30000 or more as ⁇ force 0 to 60
- the absolute value of the temperature coefficient ⁇ of the resonance frequency can be controlled to 30 ppmZ ° C or less, and it has a high temperature stability and excellent dielectric properties, but the optimum firing temperature is 1 550.
- the high temperature of ° C increased the overall cost of the product, which has a very high energy cost in the firing process.
- Patent Document 1 and Patent Document 2 include, for example, SiO,
- MnCO B 2 O, NiO, CuO, Li 2 CO, Pb 2 O, Bi 2 O, V 2 O, WO, etc.
- the firing temperature can be reduced by about 20 ⁇ 30 ° C at most.
- the Q value (1 GHz ) Decreases to less than 30000, it is impossible to achieve both high V and dielectric properties required for a high frequency dielectric ceramic composition and low cost.
- an object of the present invention is to provide a dielectric ceramic composition for high frequency that can solve the above-described problems, that is, the ⁇ and Q values are high even when used in a high frequency region such as microwaves and millimeter waves.
- a dielectric ceramic composition for high frequency use that has excellent dielectric properties such as a small absolute value of ⁇ rf and that can be fired at a temperature of 1400 ° C or lower, which is sufficiently lower than before. There is a habit.
- Another object of the present invention is to provide a dielectric resonator, a dielectric filter, a dielectric duplexer, and a communication device using the dielectric ceramic composition for high frequency.
- the dielectric ceramic composition for high frequency includes Ca, Ti, Ml (Ml is at least one of Zn and Mg), M2 (M2 is at least one of Nb and Ta) 1), Ln (Ln is at least one of Y, La, Nd, Sm and Pr) and A1, and the composition formula is: (l -y) xCaTi O — (1—y) (1—x) Ca (Ml M2) O -yLnAl O
- the dielectric resonator according to claim 2 of the present invention is a dielectric resonator in which the dielectric ceramic is operated by being electromagnetically coupled to an input / output terminal. Is characterized by comprising the dielectric ceramic composition for high frequency according to claim 1.
- the dielectric filter according to claim 3 of the present invention includes the dielectric resonator according to claim 2 and external coupling means connected to the input / output terminals of the dielectric resonator. It is characterized by having prepared.
- the dielectric duplexer according to claim 4 of the present invention includes at least two dielectric filters, input / output connection means connected to each of the dielectric filters, and each of the dielectric filters.
- a dielectric device comprising a common antenna connection means;
- a duplexer, wherein at least one of the dielectric filters is the dielectric filter according to claim 3.
- a communication device is a transmission circuit connected to the dielectric duplexer according to claim 4 and at least one input / output connection means of the dielectric duplexer.
- a receiving circuit connected to at least one input / output connection means different from the input / output means connected to the transmission circuit, and an antenna connected to the antenna connection means of the dielectric duplexer. It is characterized by comprising.
- the dielectric ceramic composition for high frequency of the present invention includes Ca, Ti, Ml (Ml is at least one of Zn and Mg), M2 (M2 is at least one of Nb and Ta), Ln (Ln Includes at least one of Y, La, Nd, Sm, and Pr), and A1, and has a composition formula: (1—y) xCaTi a
- a dielectric ceramic composition for high frequency having electrical characteristics can be obtained at a firing temperature of 1300 to 1400 ° C., which is lower than before.
- the remarkable low-temperature sintering effect is that B 2 O is contained as a subcomponent and the main component is added.
- the MoSi heating element is expensive, and the firing furnace using the MoSi heating element is If the product is small and the productivity is low, the temperature tends to increase due to the fact that the power consumption is high because the temperature is raised to a high temperature by force.
- the maximum temperature in the firing process is 1400 ° C or lower, it is possible to perform firing efficiently with a large-capacity firing furnace using inexpensive SiC (silicon carbide) as a heating element. Therefore, the cost can be reduced.
- the dielectric ceramic composition of the present invention has excellent dielectric characteristics as described above, and can greatly reduce the cost involved in the manufacturing process. Not only small dielectric filters and dielectric duplexers for communication equipment such as radios and satellite broadcast receivers, but also excellent dielectric resonators mounted on large dielectric filters and dielectric duplexers for base stations. It can be offered at a lower price than before while maintaining its dielectric properties.
- FIG. 1 is a cross-sectional view schematically showing the basic structure of a dielectric resonator formed using the high frequency dielectric ceramic composition of the present invention.
- FIG. 2 is a block diagram showing an example of a communication device configured using the dielectric resonator shown in FIG.
- FIG. 1 is a cross-sectional view schematically showing the basic structure of a dielectric resonator according to this embodiment configured using the high frequency dielectric ceramic composition of the present invention.
- the dielectric resonator 1 includes, for example, a metal case 2 as shown in FIG. 1, and a columnar dielectric ceramic 4 supported by a support base 3 is disposed in the space inside the metal case 2. .
- a coupling loop 5 is formed between the center conductor and the outer conductor of the coaxial cable 7 to serve as an input terminal.
- a coupling loop 6 is formed between the central conductor and the outer conductor of the coaxial cable 8 to serve as an output terminal.
- Each terminal is held by the metal case 2 in a state where the outer conductor and the metal case 2 are electrically joined.
- the dielectric porcelain 4 operates by electromagnetic coupling to the input terminal and the output terminal, and only a signal having a predetermined frequency input from the input terminal is output from the output terminal.
- the dielectric ceramic 4 provided in such a dielectric resonator 1 is composed of the high frequency dielectric ceramic composition of the present invention.
- the dielectric resonator 1 shown in FIG. 1 is a TE ⁇ mode resonator used in a base station or the like.
- the high-frequency dielectric ceramic composition of the present invention can be similarly applied to dielectric resonators using other ⁇ mode, ⁇ mode, and ⁇ mode.
- FIG. 2 is a block diagram showing an example of a communication device configured using the dielectric resonator 1 described above.
- the communication device 10 shown in FIG. 2 includes a dielectric duplexer 12, a transmission circuit 14, a reception circuit 16, and an antenna 18.
- the transmission circuit 14 is connected to the input connection means 20 of the dielectric duplexer 12, and the reception circuit 16 is connected to the output connection means 22 of the dielectric duplexer 12.
- the antenna 18 is connected to the antenna connection means 24 of the dielectric duplexer 12.
- the dielectric duplexer 12 includes two dielectric filters 26 and 28.
- the dielectric filters 26 and 28 are configured by connecting external coupling means to the dielectric resonator of the present invention.
- each of the dielectric filters 26 and 28 is configured by connecting the external coupling means 30 to the input / output terminals of the dielectric resonator 1 shown in FIG.
- One dielectric filter 26 is connected between the input connecting means 20 and the other dielectric filter 28, and the other dielectric filter 28 is connected to one dielectric filter 26 and the output connecting means 22. Connected between.
- the dielectric ceramic composition for high frequency of the present invention which is advantageously used in the high frequency region, like the dielectric ceramic 4 provided in the dielectric resonator 1 shown in FIG. I will explain.
- the high frequency dielectric ceramic yarn composite of the present invention includes Ca, Ti, Ml (Ml is at least one of Zn and Mg), M2 (M2 is at least one of Nb and Ta), Ln (Ln is at least one of Y, La, Nd, Sm and Pr), and A1, and the composition formula: (1—y) xCaTi a
- composition formula: (l—y) xCaTi O selected for x, y, z, h, a, b, and c (where h (1 y) x) shown in Table 1 respectively.
- the dielectric porcelain composition contained in part and the composition formulas selected for each of the rare earths Ln and z shown in Table 2 are: 0.553CaTiO—0.297Ca (Zn Nb) 0—0. 150LnAlO
- Each of the above starting material powders was prepared so as to obtain a dielectric ceramic composition.
- the blended powder was wet-mixed for 16 hours using a ball mill and dispersed uniformly, and then subjected to dehydration and drying treatments to obtain adjusted powder.
- this adjusted powder is calcined at a temperature of 1000 to 1300 ° C for 3 hours, an appropriate amount of binder is added to the obtained calcined powder, and wet pulverized again using a ball mill for 16 hours. By doing so, a powder for firing was obtained.
- the resonance frequency was measured by the cavity method, and ⁇ was measured in the temperature range of 25 to 55 ° C.
- Table 1 to Table 3 [As shown, within the scope of the present invention [Sample No. 8, 10, 12 to 16, 19, 2 3, 25, 27, 33, 41, 43, 49] , 51, 57, 59, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97 and 99-103 dielectric
- the relative dielectric constant ⁇ force is large as 1 to 56
- Q value (1 GHz) force is as high as 0700 to 37300
- the absolute value of ⁇ Excellent high-frequency dielectric properties with a small value of 30ppmZ ° C or less were obtained.
- the Q value (1 GHz) force is less than 30000.
- the Q value (1 GHz) is less than 30000.
- the direct (1 GHz) force is less than 3000.
- B 2 O is used as a B component as a subcomponent, but B C etc.
- the high-frequency dielectric ceramic composition of the present invention may be devised with a slight amount of added calories within the range not impairing the object of the present invention.
- the firing temperature can be further lowered by 20-30 ° C without deteriorating the characteristics of the dielectric ceramic.
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Abstract
Description
Claims
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JP2007508030A JP4596004B2 (ja) | 2005-03-16 | 2006-02-02 | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサ、及び通信機装置 |
US11/850,445 US7397332B2 (en) | 2005-03-16 | 2007-09-05 | High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus |
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CN115925412A (zh) * | 2023-01-13 | 2023-04-07 | 广东风华高新科技股份有限公司 | 一种微波陶瓷粉体材料及其制备方法与应用 |
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US9437910B2 (en) | 2011-08-23 | 2016-09-06 | Mesaplexx Pty Ltd | Multi-mode filter |
US9406988B2 (en) | 2011-08-23 | 2016-08-02 | Mesaplexx Pty Ltd | Multi-mode filter |
US20140097913A1 (en) | 2012-10-09 | 2014-04-10 | Mesaplexx Pty Ltd | Multi-mode filter |
US9325046B2 (en) | 2012-10-25 | 2016-04-26 | Mesaplexx Pty Ltd | Multi-mode filter |
CN103214240B (zh) * | 2013-03-20 | 2014-12-17 | 瑞声精密制造科技(常州)有限公司 | 压电陶瓷材料、烧结体及其制备方法、压电陶瓷器件 |
US9614264B2 (en) | 2013-12-19 | 2017-04-04 | Mesaplexxpty Ltd | Filter |
US10312563B2 (en) | 2016-11-08 | 2019-06-04 | LGS Innovations LLC | Ceramic filter with differential conductivity |
CN109336597A (zh) * | 2018-12-13 | 2019-02-15 | 张家港保税区灿勤科技有限公司 | 5g基站用陶瓷介质波导滤波器的制备方法及测试方法 |
CN110734284A (zh) * | 2019-11-11 | 2020-01-31 | 深圳顺络电子股份有限公司 | 一种中介高q微波介质陶瓷材料及其制备方法 |
CN110950656B (zh) * | 2019-12-18 | 2022-05-24 | 广东国华新材料科技股份有限公司 | 一种复合微波介质陶瓷及其制备方法 |
CN111548145A (zh) * | 2020-05-30 | 2020-08-18 | 张保林 | 微波介质陶瓷滤波器注塑成型方法及其陶瓷滤波器 |
CN113078429A (zh) * | 2021-03-12 | 2021-07-06 | 电子科技大学 | 一种准平面化复合基板微带环形器 |
CN114276131B (zh) * | 2021-12-30 | 2023-04-11 | 湖南纳金新材料技术有限公司 | 一种中介电常数的微波介质陶瓷材料及制备其的方法 |
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JP2001163665A (ja) * | 1999-12-13 | 2001-06-19 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサ及び通信機装置 |
JP2001192265A (ja) * | 1999-10-25 | 2001-07-17 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
JP2002029837A (ja) * | 2000-07-12 | 2002-01-29 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
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US4485180A (en) * | 1982-09-06 | 1984-11-27 | Murata Manufacturing Co., Ltd. | High frequency dielectric ceramic compositions |
DE3444340A1 (de) * | 1983-12-06 | 1985-06-13 | Murata Manufacturing Co., Ltd., Nagaokakyo, Kyoto | Dielektrische keramische zusammensetzung fuer mikrowellen-frequenzen |
JPS61280104A (ja) * | 1985-06-05 | 1986-12-10 | Murata Mfg Co Ltd | 誘電体共振器装置 |
DE3623152A1 (de) * | 1985-07-13 | 1987-01-22 | Murata Manufacturing Co | Dielektrische keramische zusammensetzung fuer hohe frequenzen |
JP3475779B2 (ja) * | 1998-03-25 | 2003-12-08 | 株式会社村田製作所 | 誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
JPH06333426A (ja) * | 1993-05-21 | 1994-12-02 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物 |
EP1013624B1 (en) * | 1998-12-24 | 2008-10-08 | Murata Manufacturing Co., Ltd. | High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer and communication device |
JP2000290068A (ja) * | 1999-04-09 | 2000-10-17 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
JP3840869B2 (ja) * | 1999-10-28 | 2006-11-01 | 株式会社村田製作所 | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
JP2002020169A (ja) * | 2000-07-03 | 2002-01-23 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
JP3562454B2 (ja) * | 2000-09-08 | 2004-09-08 | 株式会社村田製作所 | 高周波用磁器、誘電体アンテナ、支持台、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
US6649553B2 (en) * | 2001-04-12 | 2003-11-18 | Murata Manufacturing Co. Ltd. | Dielectric ceramic composition, dielectric ceramic compact and electronic component including the same |
JP4446324B2 (ja) * | 2001-09-27 | 2010-04-07 | 株式会社村田製作所 | 誘電体磁器組成物及びそれを用いたコンデンサ |
JP2004143033A (ja) * | 2002-08-30 | 2004-05-20 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
JP4155132B2 (ja) * | 2003-04-23 | 2008-09-24 | 株式会社村田製作所 | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
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2006
- 2006-02-02 WO PCT/JP2006/301743 patent/WO2006098093A1/ja not_active Application Discontinuation
- 2006-02-02 JP JP2007508030A patent/JP4596004B2/ja not_active Expired - Fee Related
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2007
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JP2001192265A (ja) * | 1999-10-25 | 2001-07-17 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
JP2001163665A (ja) * | 1999-12-13 | 2001-06-19 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサ及び通信機装置 |
JP2002029837A (ja) * | 2000-07-12 | 2002-01-29 | Murata Mfg Co Ltd | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサおよび通信機装置 |
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CN115925412A (zh) * | 2023-01-13 | 2023-04-07 | 广东风华高新科技股份有限公司 | 一种微波陶瓷粉体材料及其制备方法与应用 |
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JPWO2006098093A1 (ja) | 2008-08-21 |
JP4596004B2 (ja) | 2010-12-08 |
US20080061905A1 (en) | 2008-03-13 |
US7397332B2 (en) | 2008-07-08 |
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