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31. 发明专利

JP2000188522A MOBILE RADIO TERMINAL AND SURFACE ACOUSTIC WAVE ANTENNA SHARING UNIT 失效
公开(公告)号：JP2000188522A
公开(公告)日：2000-07-04
申请号：JP36407498
申请日：1998-12-22
申请人： HITACHI LTD , HITACHI MEDIA ELECTRON KK
发明人： HIKITA MITSUTAKA , SAKIYAMA KAZUYUKI , MATSUURA NAOKI , SHIBAGAKI NOBUHIKO
IPC分类号： H03H9/25 , H01P1/213 , H01Q1/24 , H03H9/72 , H04B1/52 , H04Q7/32
摘要： PROBLEM TO BE SOLVED: To miniaturize and lighten a unit by sticking an upper dielectric substrate and a lower dielectric substrate by adhesion, making a multilayer substrate, installing a space in a part of the lower dielectric substrate, incorporating SAW filters, installing a solder application part for loading lumped circuit elements on the upper face of the upper dielectric substrate and installing a land with solder on the lower face of the substrate. SOLUTION: An upper dielectric substrate 11 and a lower dielectric substrate 12 are stuck by adhesive 15 and a dielectric multilayer substrate is formed. Lumped circuit elements 13 constituting phase shift circuits and matching circuits are loaded on the upper face (uppermost face of dielectric mutilayer substrate) of the upper dielectric substrate 11, a space is installed in a part of the lower dielectric substrate 12 and SAW filters 16 are incorporated. Solder application parts 55 for loading the lumped circuit elements 13 are installed on the upper face of the upper dielectric substrate 11 and a land with solder, which loads the SAW filters 16, is installed on the lower face. Signal terminal or ground terminal patterns 18 are installed on the lower face of the lower dielectric substrate 12.

32. 发明专利

JPH08102631A POWER AMPLIFIER MODULE AND RADIO EQUIPMENT 失效
公开(公告)号：JPH08102631A
公开(公告)日：1996-04-16
申请号：JP12115295
申请日：1995-05-19
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： HAMADA KUNIHIRO , HIKITA MITSUTAKA , CHIBA YUTAKA , ABE YOSHIO
IPC分类号： H03F3/60 , H03F3/24 , H03F3/68 , H04B1/03
摘要： PURPOSE: To obtain a power amplifier module miniaturized by integrally forming a band filter, a driving amplifier and a power amplifier and a radio equipment using the module. CONSTITUTION: In the power amplifier module provided with the power amplifier 103 for amplifying small power to large power and the driving amplifier 104 for driving the amplifier 103, the amplifier 104 having an input matching circuit for a surface acoustic wave filter 105, the filter 105 and the power amplifier 103 having an output matching circuit for the filter 105 are integrally arranged on the heat radiating base board 102 so that the filter 105 are located between both the amplifiers 103, 104.

33. 发明专利

JPH07326943A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPH07326943A
公开(公告)日：1995-12-12
申请号：JP12097594
申请日：1994-06-02
申请人： HITACHI LTD
发明人： TAKUBO CHISANORI , HIKITA MITSUTAKA
IPC分类号： H03H3/08 , H03H9/145
摘要： PURPOSE:To form a surface acoustic wave high in reliability by forming the electrode pattern excellent in migration resistance. CONSTITUTION:The electrode pattern consists of Al and multilayer film structure 2 (3 to 6) formed by laminating the epitaxial layers 3 to 6 of an Al alloy using Al and one kind of additive M, and the concentration of the one kind of additive M in the layers 3 to 6 are different from each other in the direction of thickness. Consequently, the concentration of the additive are different from each other in the direction of thickness, so that the electrode pattern excellent in migration resistance can be formed even on any substrate.

34. 发明专利

JPH04253414A BRANCH FILTER USING SURFACE ACOUSTIC WAVE RESONATOR COMPOSITE FILTER 失效
公开(公告)号：JPH04253414A
公开(公告)日：1992-09-09
申请号：JP961591
申请日：1991-01-30
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： TABUCHI TOYOJI , HIKITA MITSUTAKA , SHIBAGAKI NOBUHIKO , AKAGI TAKATOSHI , SUZUKI KAZUTOSHI
IPC分类号： H03H9/25 , H03H9/64
摘要： PURPOSE:To reduce energy consumption by deciding the arrangement and connecting method of one-opening surface acoustic wave resonators so that an impedance characteristic on the side or a common terminal can have reactivi ty. CONSTITUTION:With a single antenna 1 as the common terminal, a filter 2 for reception and a filter 3 for transmission are parallelly connected. In this case, the four one-opening surface acoustic wave resonators composed of electrodes 4-1-4-6 or the like and gap capacitors composed of electrode patterns 5-1 and 5-2 are provided and formed on a piezoelectric substrate 7, which can propagate surface acoustic waves, so as to be used as the filter 3 for transmission. Further, acoustic absorbing materials 6-1-6-6 for absorbing the surface acoustic waves and inductances 8-1-8-4 for matching an outside circuit are provided. Moreover, each one-opening surface acoustic wave resonator is composed of an equivalent inductance 11-1, equivalent capacitor 12-1 and electrostatic capacitor 13-1.

35. 发明专利

JPH04132409A SURFACE ACOUSTIC WAVE RESONATOR 失效
公开(公告)号：JPH04132409A
公开(公告)日：1992-05-06
申请号：JP25197590
申请日：1990-09-25
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： TABUCHI TOYOJI , HIKITA MITSUTAKA , SHIBAGAKI NOBUHIKO , KIKUKAWA ATSUSHI , AKAGI TAKATOSHI , SUZUKI KAZUTOSHI
IPC分类号： H03H9/145 , H03H9/64
摘要： PURPOSE:To suppress the degradation in the characteristic between attenuation poles by forming a multi-pair transducer of one-aperture surface acoustic wave resonator with the combination of >= two regions with different electrode pitches. CONSTITUTION:This surface acoustic wave transducer consists of plural regions and each region is arranged with plural interdigital electrode pairs continuously at the same pitch and pitches P1, P2 of the interdigital electrode pairs of the adjacent regions are made different. That is, the transducer consists of regions (5-1)-(5-2) in which the electrode finger pitch of the transducer is P1 and regions (6-1)-(6-3) in which the electrode finger pitch of the transducer is P2. In this case, the resonance characteristic of the one-aperture surface acoustic wave resonator in which the multi-pair transducer consists of plural regions whose electrode finger pitch differs has plural attenuation poles corresponding to the plural electrode pitches. Thus, since the resonator composite filter composed of plural one-aperture surface acoustic wave resonators has attenuation poles more then the total number of the one-aperture surface acoustic wave resonators, the frequency difference between the attenuation poles is set small and the degradation in the characteristic between the attenuation poles is suppressed.

36. 发明专利

JPH0472950A RADIO TELEPHONE SET 失效
公开(公告)号：JPH0472950A
公开(公告)日：1992-03-06
申请号：JP18397290
申请日：1990-07-13
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： KUROSAWA KAZUHITO , HIKITA MITSUTAKA , TABUCHI TOYOJI , SHIBAGAKI NOBUHIKO , SUZUKI KAZUTOSHI , OTSUKA TOSHIHIRO , AKAGI TAKATOSHI
IPC分类号： H04M1/02 , H01Q1/44
摘要： PURPOSE:To make the radio telephone set main body small to the utmost by adopting the structure for a microphone support member so as to be drawn out of a main body of the radio telephone set and using the drawn-out part as an antenna. CONSTITUTION:An antenna 6 is suspended and projected from a bottom face 1a and a microphone 5 is fitted to the tip of the antenna 6. In the case of talking, a speaker 2 built in the main body 1 is in contact with an ear and the microphone 5 at the tip of the antenna 6 is placed close to a mouth. Thus, even when the size of the main body 1 is made small, a sufficient distance is ensured between the speaker 2 and the microphone 5 and talking quality is kept constant. Moreover, since the support member of the microphone 5 is used as an antenna, it is not required to provide the antenna separately from the support member of the microphone.

37. 发明专利

JPH047127B2 失效
公开(公告)号：JPH047127B2
公开(公告)日：1992-02-10
申请号：JP16835382
申请日：1982-09-29
申请人： HITACHI LTD
发明人： TABUCHI TOYOJI , HIKITA MITSUTAKA
IPC分类号： H03H3/08 , H03H9/145 , H03H9/64

38. 发明专利

JPH043510A VERY THIN MIGRATION-PROOF ELECTRODE 失效
公开(公告)号：JPH043510A
公开(公告)日：1992-01-08
申请号：JP10295090
申请日：1990-04-20
申请人： HITACHI LTD
发明人： IMURA AKIRA , ASAI KENGO , SHIBAGAKI NOBUHIKO , ISOBE ATSUSHI , HIKITA MITSUTAKA , SUZUKI MAKOTO , HOSHINA YOSHINORI
IPC分类号： H03H3/08 , H03H9/145
摘要： PURPOSE:To attain long service life of the electrode by suppressing diffusion of grain boundary of Al atoms of 1st electrode layers and 2nd electrode layers arranged periodically in a multi-layer thin film electrode of long period structure. CONSTITUTION:An electrode pattern 1 is formed on a piezoelectric substrate LST cut crystal 2 with photo etching, the electrode is formed to be a multi-layer electrode of long period structure in which 1st electrode layers 3 made of a pure Al thin film or an Al thin film added with a low concentration impurity and 2nd electrode layers 4 made of a pure Al thin film or an Al thin film added with a low concentration impurity are laminated alternately. The 1st layer 3 and the 2nd layer 4 are sequentially laminated while cooling the substrate at a temperature of a liquid nytrogen or below and no mutual diffusion between the piezoelectric substrate 2, the 1st layer and the 2nd layer is caused. Thus, the migration-proof of the 1st layer itself is improved, the power resistance and the long term reliability of a surface acoustic wave element are improved.

39. 发明专利

JPH03272215A MOUNT STRUCTURE FOR SURFACE ACOUSTIC WAVE CIRCUIT DEVICE 失效
公开(公告)号：JPH03272215A
公开(公告)日：1991-12-03
申请号：JP6961390
申请日：1990-03-22
申请人： HITACHI LTD
发明人： SUZUKI KAZUTOSHI , ISHIDA YOSHIKATSU , HIKITA MITSUTAKA
IPC分类号： H03H9/25 , H05K1/02 , H05K1/18
摘要： PURPOSE:To prevent deterioration in the loss at a pass band by arranging a metallic member in continuity with a common ground conductor to a printed circuit board part between an input pin and an output pin. CONSTITUTION:A surface acoustic wave circuit element having interdigital electrodes is mounted on a metallic case (Ttheta can) 2, and an input pin 3 and an output pin 4 are projected from a bottom face of the Ttheta can 2 at a prescribed interval. The input pin 3 and the output pin 4 are inserted through a printed circuit board 5 and connected to connection conductor patterns 8A, 8B respectively formed on the other side of the printed circuit board 5. Then a metallic member 12 in continuity with a common ground conductor 6 is arranged to a part of at least the printed circuit board 5 between the input pin 3 and the output pin 4. Since the metallic member 12 acts like an electromagnetic shield member, the interconnection between the input pin 3 and the output pin 4 and the production of a parasitic capacitor between the input pin 3 and the output pin 4 and the printed circuit board 5 are suppressed.

40. 发明专利

JPH03205908A SURFACE ACOUSTIC WAVE DEVICE AND COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH03205908A
公开(公告)日：1991-09-09
申请号：JP27225990
申请日：1990-10-12
申请人： HITACHI LTD
发明人： HIKITA MITSUTAKA , TABUCHI TOYOJI , SHIBAGAKI NOBUHIKO , HIRASHIMA TETSUYA
IPC分类号： H03H9/64
摘要： PURPOSE:To obtain a sharp rise/fall characteristic of a filter with a low loss and a high attenuation characteristic by combining surface acoustic wave elements to constitute a composite filter. CONSTITUTION:In a branching device in which a transmitting system Tx and a receiving system Rx use a single antenna in common, a transmitting filter 4, and a filter 5 having a prescribed characteristic are formed on a piezoelectric substrate whose electromechanical coupling coefficient is different, respectively, and by combining surface acoustic wave elements, a composite filter is constituted and formed in the same chip or the same package. A receiving signal which is made incident from an antenna terminal passes through a suitable line 2 for synthesizing transmission and reception, and thereafter, inputted to a receiving filter 3 through the filter 5, and between the antenna terminal and the Rx terminal, a necessary frequency characteristic is obtained. In such a way, the communication equipment which has a sharp rise/fall characteristic of the filter, and also, whose loss is low, and moreover, which has a high attenuation characteristic can be obtained.

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