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31. 发明专利

JPH11298203A MAGNETOSTATIC WAVE DEVICE 失效
公开(公告)号：JPH11298203A
公开(公告)日：1999-10-29
申请号：JP12187298
申请日：1998-04-14
申请人： MURATA MANUFACTURING CO
发明人： OKADA TAKEKAZU , NISHIMURA SATORU
IPC分类号： H01P1/215 , H01P1/23 , H01P5/08 , H01P7/00
摘要： PROBLEM TO BE SOLVED: To provide a magnetostatic wave device with which impedance matching is facilitated even when a magnetostatic wave filter in small size is used, and it is not necessary to use the amplifier of high output power. SOLUTION: A signal is inputted to an input terminal 30, and high-level and low-level signals provided by a first directional coupler 28 are inputted to two magnetostatic wave filters 12 and 14. At the first magnetostatic wave filter 12, the amplitude of a main signal is limited and a noise is outputted without limiting its amplitude. At the second magnetostatic wave filter 14, all the signals are outputted without limiting their amplitudes. The phase of an output signal from the second magnetostatic wave filter 14 is inverted by a 180 deg. phase shifter 34 and this signal is synthesized with the output signal of the first magnetostatic wave filter 12 by a second directional coupler 32. As circuits for impedance matching, capacitors 38 and 40 are connected on the input side of the first magnetostatic wave filter 12 and the output side of the second magnetostatic wave filter 14.

32. 发明专利

JPH11251140A MAGNETOSTATIC WAVE ELEMENT 失效
公开(公告)号：JPH11251140A
公开(公告)日：1999-09-17
申请号：JP5075598
申请日：1998-03-03
申请人： SHINETSU CHEMICAL CO , JAPAN BROADCASTING CORP
发明人： IKARI MASANORI , TANNO MASAYUKI , RIYUUOU TOSHIHIKO , KUKI TAKAO , NOMOTO TOSHIHIRO
IPC分类号： C30B29/28 , H01F10/24 , H01F10/28 , H01F41/28 , H01P1/23 , H01P3/00 , H01P7/00 , H03H9/25
摘要： PROBLEM TO BE SOLVED: To provide a reflection type magnetostatic wave element which is excellent in temperature characteristics in 1-1.35 GHz band where dynamic characteristics is improved than 400 MHz band. SOLUTION: A garnet magnetic thin film for a magnetostatic wave element, a transducer 4 for exciting the magnetic thin film with magnetostatic wave, and a bias magnetic field are provided. Here, the magnetic thin film is formed on a Gd3 Ga5 O12 substrate 1 off-angled by 1-5 deg. from a surface (110) by liquid- phase epitaxial method, and with an angle between the longitudinal direction of the transducer 4 and the vertical direction relative to direction of the magnetic thin film's crystal being θ1 , while an angle between the vertical direction relative to the longitudinal direction of the transducer 4 and a magnetic field application direction of a bias magnetic field being θ2 , a range is 0 deg.

33. 发明专利

JPH10224263A SPREAD SPECTRUM COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH10224263A
公开(公告)日：1998-08-21
申请号：JP2512697
申请日：1997-02-07
申请人： MURATA MANUFACTURING CO
发明人： KAWACHI TETSUYA , KANETANI FUMIO , TANAKA HIROAKI
IPC分类号： H04B1/707 , H01P1/215 , H01P1/23 , H04B1/10 , H04B1/71
摘要： PROBLEM TO BE SOLVED: To provide spread spectrum communication equipment that is made small in size at a low cost and is provided with a narrow-band disturbing wave elimination device which covers a frequency band of a spread signal entirely. SOLUTION: A level of a spread signal received by an antenna 2 is amplified to a constant level by using an amplification factor variable amplifier 8, a distributer 9 and a level detection circuit 10, a narrow band disturbing wave with a higher level than that of the spread signal is limited stepwise by using magnetostatic wave filters 11, 12, 13, which are connected in series so that saturation levels lower sequentially. Thus, the level of the narrow-band disturbing wave included in the spread signal is limited in a state to suppress rolling-in small, and the S/N after demodulation is improved. Furthermore, a narrow-band disturbance wave elimination circuit is made small in size.

34. 发明专利

JPH09307317A MAGNETOSTATIC WAVE DEVICE 失效
公开(公告)号：JPH09307317A
公开(公告)日：1997-11-28
申请号：JP14673296
申请日：1996-05-15
申请人： MURATA MANUFACTURING CO
发明人： NIIMURA SATORU , MATSUZAKI HIROYASU
IPC分类号： H01P1/215 , H01P1/23 , H01P3/00
摘要： PROBLEM TO BE SOLVED: To provide a stable magnetostatic wave device whose characteristic such as a frequency width for output limit and a saturation time is independent of a frequency of an input signal by using a power adjustment means to make a ratio of an input power to a saturation power constant. SOLUTION: An input terminal 18 of an attenuator A14 connects to one terminal of a resistor 20 and the other terminal of the resistor 20 connects to an output terminal 22. The output terminal 22 is connected to an input transducer of a ferrimagnetic element. Furthermore, one terminal of a capacitor 24 connects to the input terminal 18 of the resistor 20 and the other terminal of the capacitor 24 connects to a ground electrode 28. Furthermore, one terminal of a capacitor 26 connects to an output terminal 22 of the resistor 20 and the other terminal of the capacitor 26 connects to the ground electrode 28. Since the insert loss of the attenuator A14 is proportional to the frequency of an input signal, the attenuator A14 as a power adjustment means in this magnetostatic wave device passes the input power through the ferrimagnetic element inversely proportional to the frequency of the input signal.

35. 发明专利

JPH09232816A MAGNETOSTATIC WAVE S/N ENHANCER 失效
公开(公告)号：JPH09232816A
公开(公告)日：1997-09-05
申请号：JP3649396
申请日：1996-02-23
申请人： JAPAN BROADCASTING CORP
发明人： KUKI TAKAO , NOMOTO TOSHIHIRO
IPC分类号： H01P1/23 , H01P3/00
摘要： PROBLEM TO BE SOLVED: To reduce the saturated transient response time by producing a DC magnetic field in parallel with a face of a magnetic thin film tangent to an exciting electrode and in an oblique direction to a generated high frequency magnetic field. SOLUTION: An exciting electrode 1 is formed as a microstrip line with one end short-circuited onto a conventional dielectric board 10, an extension direction of the line is oblique to opposed faces of permanent magnets 7, 8. The magnetostatic wave S/N enhancer is in operation in the MSSW/MSBVW hybrid mode by placing the exciting electrode 1 oblique to the face of the magnets. Furthermore, a YIG thin film 2 is arranged in close contact with the exciting electrode 1 and a DC magnetic field is given externally with a magnetic circuit consisting of the permanent magnets 7, 8 and a yoke 9 interlinking them magnetically. Thus, the high frequency magnetic field for exciting a magnetostatic wave and the external DC magnetic field are interlinked obliquely, that is, an angle between both magnetic fields is selected to be a proper angle within the range of 0 deg.

36. 发明专利

JPH09190919A MAGNETOSTATIC WAVE DEVICE 失效
公开(公告)号：JPH09190919A
公开(公告)日：1997-07-22
申请号：JP2214696
申请日：1996-01-11
申请人： MURATA MANUFACTURING CO
发明人： FUJINO MASARU
IPC分类号： H01F10/24 , H01P1/215 , H01P1/23 , H01P3/00
摘要： PROBLEM TO BE SOLVED: To improve the function of a magnetostatic wave device by adding a specified amount of Sn element to a magnetic garnet single-crystal film containing Fe element, so that an input electric power is outputted as it is and transient response phenomenon that saturates with time becomes small. SOLUTION: This magnetostatic wave device 10 contains rectangular parallelopipe-shaped substrate 12, and the substrate 12 is a Gd3 Ga5 O12 substrate. On one main surface of the substrate 12, a rectangular parallelopiped-shaped magnetic garnet single-crystal film 14 is formed. This magnetic garnet single- crystal film 14 is a magnetic garnet single-crystal film containing Fe element. On the main surface on the opposite side to the substrate 12 of the magnetic garnet single-crystal film 14, an input terminal 16 and an output terminal 18 are formed parallel to each other. In addition, the input terminal 16 and the output terminal 18 are earthed by its end respectively. The magnetic garnet single-crystal film 14 containing Fe element is added with Sn element by 10-3000 wtppm.

37. 发明专利

JPH08242105A STATIC MAGNETIC WAVE DEVICE 失效
公开(公告)号：JPH08242105A
公开(公告)日：1996-09-17
申请号：JP32400295
申请日：1995-11-16
申请人： MURATA MANUFACTURING CO
发明人： OKADA TAKEKAZU , NIIMURA SATORU , KANETANI FUMIO
IPC分类号： H01P1/215 , H01P1/23 , H01P3/00
摘要： PURPOSE: To provide a static magnetic wave device which is made small and inexpensive. CONSTITUTION: An S/N enhancer 10 as the static magnetic wave device contains the YIG thin film 12 of a rectangular plate form as a ferri-magnetic substrate. The YIG thin film 12 is formed on one main surface of the GGG substrate 14 of the rectangular plate form, for example. A transducer 16 consisting of a conductor is wound five times around the YIG thin film 12 and the GGG substrate 14, for example. Thus, the transducer 16 is provided with five parts arranged in parallel to one main surface side of the YIG thin film 12 and five parts arranged almost in parallel to the other main surface side of the YIG thin film 12. One end of an input terminal 18 is connected to one end of the transducer 16 and one end of an output terminal 20 is connected to the other end of the transducer 16. The other end of the input terminal 18 and the other end of the output terminal 20 are respectively grounded.

38. 发明专利

JPH0766037A LAMINATED ELECTRONIC PARTS 失效
公开(公告)号：JPH0766037A
公开(公告)日：1995-03-10
申请号：JP23243893
申请日：1993-08-25
申请人： TDK CORP
发明人： YASUDA KATSUHARU , TAKATANI MINORU
IPC分类号： H01F27/00 , H01F17/00 , H01P1/23 , H03H7/01
摘要： PURPOSE:To provide laminated electronic parts in a configuration for increasing the amount of attenuation for a high frequency and at the same time increasing the degree of freedom in terms of freedom in the laminated electronic parts with the lamination structure of a coil conductor and a magnetic body. CONSTITUTION:A conductor 4 for generating eddy current due to a high-frequency current flowing to a coil conductor 1 is incorporated at a surrounded part within the coil conductor 1 formed spirally in a laminated body. The conductor 4 is provided also at the outside of the coil conductor 1.

39. 发明专利

JPH0758522A S/N ENHANCER 失效
公开(公告)号：JPH0758522A
公开(公告)日：1995-03-03
申请号：JP22788593
申请日：1993-08-19
申请人： MURATA MANUFACTURING CO , JAPAN BROADCASTING CORP
发明人： OKADA TAKEKAZU , NIIMURA SATORU , KANETANI FUMIO , ICHIGUCHI SHINICHIRO , NOMOTO TOSHIHIRO , MATSUSHITA YOSHIHIRO
IPC分类号： H01P1/215 , H01P1/23
摘要： PURPOSE:To make an S/N enhancer small by providing an adjustment screw to adjust the magnitude and distribution of a magnetic field applied to a ferrimagnetic base to the enhancer. CONSTITUTION:One magnetostatic wave element 42a is constituted by a YIG thin film 38a and two transducers 30a, 32b and the other magnetostatic wave element 42b is constituted by the other YIG thin film 38b and two transducers 30b, 32a. Furthermore, a magnetic field is applied to the YIG thin films 38a, 38b by magnets 44a, 44b contained in recessed parts 18a, 18b of a holder 14. In this case, the magnetic field is applied to the YIG thin films 38a, 38b in the same direction as the lengthwise direction of the transducers 30a, 30b, 32a, 32b. Moreover, an upper yoke 46 whose cross section is a channel shape made of a magnetic substance is inserted to an outside of a lower yoke 12 an adjustment screw 48 used to adjust the magnitude of the magnetic field applied to the YIG thin films 38a, 38b is provided to the upper part of the upper yoke 46.

40. 实用新型

JPH0619330U 失效
公开(公告)号：JPH0619330U
公开(公告)日：1994-03-11
申请号：JP6222192
申请日：1992-08-13
IPC分类号： H01P1/23 , H04B1/10

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