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101. 发明专利

JPH01119728A METHOD FOR MEASURING TEMPERATURE IN LIVING BODY 失效
公开(公告)号：JPH01119728A
公开(公告)日：1989-05-11
申请号：JP27582787
申请日：1987-11-02
申请人： HITACHI LTD
发明人： ITO YUKIO , TAKEUCHI HIROYUKI , HIKITA MITSUTAKA
IPC分类号： A61B5/01 , A61B5/00 , G01J5/00 , G01J5/50
摘要： PURPOSE:To perform the measurement of the temp. in a living body excellent in spatial resolving power in a transverse direction and temp. resolving power, by providing a surface acoustic wave (SAW) resonator to an antenna part. CONSTITUTION:An SAW resonator 3 of a microwave band (800MHz-2GHz) is interposed between a square wave guide pipe 2 and a coaxial-wave guide pipe converter. Since the Q-valve of the SAW resonator is about 100 and higher as compared with that of the wave guide pipe 2 (Q=1), the frequency of the microwave entering the wave guide pipe 2 can be taken out so as to be limited to a narrow range. Therefore, even when the opening dimension of the wave guide pipe 2 is reduced, a specific frequency region can be received without lowering sensitivity. Further, by mounting the SAW resonator 3, the dimension of an antenna can be reduced to about 1/10 and geometrical resolving power, that is, spatial resolving power in a transverse direction can be enhanced and, at the same time, since only the frequency corresponding to temp. can be picked up, temp. resolving power can be enhanced. By this method, the measurement of the temp. in a living body excellent in transverse direction spatial direction and temp. resolving power can be performed.

102. 发明专利

JPS6471206A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPS6471206A
公开(公告)日：1989-03-16
申请号：JP22631087
申请日：1987-09-11
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： KOJIMA HIROOMI , TABUCHI TOYOJI , HIKITA MITSUTAKA , KUROSAWA KAZUHITO , SUMIOKA JUNJI
IPC分类号： H03H9/25 , H03H3/08 , H03H9/145
摘要： PURPOSE:To obtain a SAW filter transducer electrode material having a resistivity lower than that of aluminum by using a superconductor thin film as a transducer electrode material for a surface acoustic wave (SAW) filter. CONSTITUTION:The titled device consists of a three-transducer SAW filter, a piezoelectric substrate 1-1, an interdigital transducer (IDT) 1-2, a lead wire 1-4, and terminals 1-5, 1-6. The IDT 1-2 consists of a stripe 1-3 made of a superconductor ceramic two-layer thin film. Through the constitution above, the electric resistance of the IDT electrode of the SAW filter is made principally zero. Thus, the insertion loss of the SAW filter is reduced more than that in using an Al electrode. Since the critical current density is improved by using a two-layer film or a multi-layer film having >=2 layers, the SAW filter with excellent power resistance is obtained.

103. 发明专利

JPS6151808B2 失效
公开(公告)号：JPS6151808B2
公开(公告)日：1986-11-11
申请号：JP461780
申请日：1980-01-21
申请人： HITACHI LTD
发明人： KINOSHITA YASUAKI , HIKITA MITSUTAKA
IPC分类号： H03H9/25 , H03H3/08 , H03H9/64

104. 发明专利

JPS61220509A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPS61220509A
公开(公告)日：1986-09-30
申请号：JP6064485
申请日：1985-03-27
申请人： HITACHI LTD , HITACHI VIDEO ENG , HITACHI ELECTRONICS
发明人： SUGAWARA SATOSHI , KINOSHITA YASUAKI , SUMIOKA JUNJI , HIKITA MITSUTAKA
IPC分类号： H03H9/145 , H03H3/08
摘要： PURPOSE:To suppress a side lobe or the like and to realize a required frequency characteristic by changing number of pairs of plural local transducers to be split, connecting them in series or parallel so as to change applied voltage. CONSTITUTION:For example, one transducer is split into six parts, partial transducers T19-T21 and T22-T24 among the transducers T19-T24 are connected in series and the transducers T19 and T24 are connected in parallel. In selecting the ratio of pairs of electrode fingers constituting the partial transducers T19-T24 as T19:T20:T21:T22:T23:T24=3:2:1:1:2:3, the weighting as shown in figure is obtained. Side lobe is suppressed through the weighting above and the required frequency characteristic is obtained.

105. 发明专利

JPS6170813A Surface acoustic wave branching filter 失效
标题翻译：表面声波分支滤波器
公开(公告)号：JPS6170813A
公开(公告)日：1986-04-11
申请号：JP19155984
申请日：1984-09-14
申请人： Hitachi Ltd
发明人： HIKITA MITSUTAKA
IPC分类号： H03H9/145 , H03H3/08
摘要： PURPOSE: To reduce spurious components by constituting a reception filter of a branching filter and using an electroacoustic transducer being reactive to a frequency near the pass band to an antenna terminal of the filter.
CONSTITUTION: A reception terminal RX and a transmission terminal TX of a branching filter are connected in parallel with an antenna terminal via reception filters R
1 , R
2 and a transmission filter T respectively. A carrier inputted from the transmission terminal TX is filtered by the transmission filter T and transmitted from the antenna 1. The carrier received by an antenna 1 is filtered by the reception filters R
1 , R
2 and outputted from the reception terminal RX. Since the input transducer of the reception filter R
1 is constituted with a transducer using the interleave weighting method or the new phase weighting method, generation of a spurious wave due to mutual conversion is reduced.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过构成分路滤波器的接收滤波器并使用与滤波器的天线端子附近的通带频率无关的电声换能器来减少杂散分量。构成：分支滤波器的接收端子RX和发送端子TX分别经由接收滤波器R1，R2和发送滤波器T与天线端子并联连接。从发送终端TX输入的载波由发送滤波器T滤波并从天线1发送。由天线1接收到的载波由接收滤波器R1，R2滤波并从接收端子RX输出。由于接收滤波器R1的输入传感器由使用交织加权方法或新相位加权方法的换能器构成，因此相互转换引起的寄生波的产生减少。

106. 发明专利

JPS60160719A SURFACE ACOUSTIC WAVE POWER SPLITTER 失效
公开(公告)号：JPS60160719A
公开(公告)日：1985-08-22
申请号：JP1516884
申请日：1984-02-01
申请人： HITACHI LTD
发明人： HIKITA MITSUTAKA , TABUCHI TOYOJI , NAKAKOSHI ARATA
IPC分类号： H03H9/145 , H03H3/08 , H03H9/76
摘要： PURPOSE:To obtain a power splitter with low loss by arranging repetitively the constitution of a basic building block for plural number of times in the propagating direction of a surface wave to constitute the splitter. CONSTITUTION:The constitution where the 1st and 2nd output transducers are arranged respectively at the upper and lower part at both sides of a couple of transducers split into the upper and lower parts is used as a basic building block and provided laterally for plural number of times, terminals corresponding electrically to the input and output are connected in parallel, an electric signal applied to an input terminal 12 is converted respectively into a surface acoustic wave by the upper/lower input transducers 14, 16, 18, 20, 22, 24, 26 and 28, the wave is converted again into an electric signal by opposed output transducers and the signal is outputted to output terminals 10 and 11. The number of pairs of each transducer repeated laterally in one chip is decreased gradually to decrease the leakage loss.

107. 发明专利

JPS5958907A Electrode constituting method of surface acoustic wave filter 失效
标题翻译：表面声波滤波器的电极构成方法
公开(公告)号：JPS5958907A
公开(公告)日：1984-04-04
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
CPC分类号： H03H3/08 , H03H9/145 , H03H9/6426
摘要： PURPOSE: To set the center frequency by the order of ≥1 digit with high accuracy in the present photomask forming specifications, by increasing or decreasing the interdigital electrode with only as to one or plural interdigital electrodes within the conventional accuracy of the photomask at each repetition of the interdigital electrodes.
CONSTITUTION: The insulating region of the interdigital electrode and between said interdigital electrodes is set to two kinds of widths, one width has a change being ≤1μm from the other and the relation of the combination of the two kinds of widths realizing the prescribed electrode pitch is provided repetitively to the entire filter. Figure (a) shows the state before the execution of this invention and figures (b), (c), (d) are the states after the execution. In figure (a), one wavelength is λ
0 and the electrode with is 1/4-wavelength, i.e. (l). In taking the change in the electrode width as Δl, the minimum value of Δl is 0.1μm in the present photomask forming device. Thus, this invention is effective when the accuracy is requested to the order of ≤0.1μm.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：在目前的光掩模形成规范中，以高精度设置中心频率大于等于1位的数字，通过增加或减少叉指电极，仅在每个光掩模的常规精度范围内仅提供一个或多个指状电极叉指电极重复。构成：叉指电极的绝缘区域和所述叉指电极之间的绝缘区域被设定为两种宽度，一个宽度的变化是<= 1mum，并且实现规定电极的两种宽度的组合的关系沥青重复提供给整个过滤器。图（a）是本发明执行前的状态，图（b），（c），（d）是执行后的状态。在图（a）中，一个波长为λ0，电极为1/4波长，即（l）。在电极宽度的变化为DELTA1时，在本光掩模形成装置中DELTA1的最小值为0.1μm。因此，当请求精度为<= 0.1mum的量级时，本发明是有效的。

108. 发明专利

JPS5951615A Surface acoustic wave resonance filter 失效
标题翻译：表面声波谐振滤波器
公开(公告)号：JPS5951615A
公开(公告)日：1984-03-26
申请号：JP13586283
申请日：1983-07-27
申请人： Hitachi Ltd
发明人： TABUCHI TOYOJI , KINOSHITA YASUAKI , HIKITA MITSUTAKA
IPC分类号： H03H3/08 , H03H9/25 , H03H9/64
CPC分类号： H03H9/25
摘要： PURPOSE:To obtain a filter with excellent in-band characteristics, by setting an electric length between two transducers and an electric length between the transducer and an equivalent reflecting plane of a reflector to a prescribed value so as to eliminate the effect of a reflected wave. CONSTITUTION:A part of a direct wave reaching directly the transducer 6 among excited waves is a reflected wave 9, which is returned to the transducer 5. On the other hand, the wave reaching the adjacent reflector 1 is reflected on the equivalent reflecting plane 11 and passes through the transducer 5, and a part of it becomes a reflected wave 10. The reflected wave 10 is reflected againt on the equivalent reflecting plane 11 of the reflector 1 and returns to the transducer 5. The two reflectors 9, 10 are interferred with each other on the transducer 5, which causes a ripple in the in-band characteristic of the filter. In order to avoid the effect of the reflected wave, the electric length l3 between the transducers 5, 6 is brought different from by an odd number multiple from the length of twice the electric length l4 between the transducer 5 and the equivalent reflected plane 11 of the transducer 5. Thus, the filter having excellent in- band characteristic is obtained.
摘要翻译：目的：为了获得具有优异带内特性的滤波器，通过将两个换能器之间的电长度和换能器与反射器的等效反射面之间的电长度设置为规定值，以消除反射波的影响。构成：在激发波之间直接到达换能器6的直接波的一部分是反射波9，其被返回到换能器5.另一方面，到达相邻反射器1的波被反射在等效反射平面11上并且通过换能器5，并且其一部分变为反射波10.反射波10再次反射在反射器1的等效反射面11上并返回到换能器5.两个反射器9,10被干涉彼此在传感器5上，这导致滤波器的带内特性中的纹波。为了避免反射波的影响，换能器5,6之间的电长度l3与换能器5和等效反射面11之间的电长度l4的两倍的长度相差奇数倍换能器5.因此，获得具有优异的带内特性的滤波器。

109. 发明专利

JPS57202114A BAND PASS FILTER 失效
公开(公告)号：JPS57202114A
公开(公告)日：1982-12-10
申请号：JP8572081
申请日：1981-06-05
申请人： HITACHI LTD
发明人： HIKITA MITSUTAKA
IPC分类号： H03H9/145 , H03H3/08 , H03H9/02 , H03H9/64
摘要： PURPOSE:To increase the attenuation at the outside of the band and to avoid ripples, by connecting transducers which are arranged symmetrically on the same base and oriented unidirectionally in series. CONSTITUTION:A signal applied to the 1st surface acoustic wave device becomes sound waves with transducers 5-1 and 5-2. Multistrip couplers 8-1 and 8-2 are used to unidirectionally orient the propagation of the waves only to a transducer 4. Most of the surface waves are reflected at the transducer 4 at a non-pass band and absorbed to a power supply and a load via the transducers 5-1 and 5-2. An output of the transducer 4 is transmitted to a transducer 6 of the 2nd surface acoustic wave devices arranged symmetrically. Through the symmetrical arrangement of both devices, the transmission between the transducers is made under correct matching. Thus, signals within the band can be transmitted without distortion.

110. 发明专利

JP2002314365A SURFACE ACOUSTIC WAVE RESONATOR HAVING DESIRED BANDWIDTH RATIO AND METHOD OF MANUFACTURING THE SAME 失效
公开(公告)号：JP2002314365A
公开(公告)日：2002-10-25
申请号：JP2001117613
申请日：2001-04-17
申请人： HITACHI LTD , HITACHI INT ELECTRIC INC
发明人： ISOBE ATSUSHI , HIKITA MITSUTAKA , SUMIOKA JUNJI , ASAI KENGO , KACHI TAKESHI
IPC分类号： H03H9/145 , H03H3/08 , H03H9/25
摘要： PROBLEM TO BE SOLVED: To realize a VCO that is excellent in a low noise characteristic by providing a resonator in which a Q value is excellent and a bandwidth ratio ranges between 0.038 and 0.132, especially a resonator in which a bandwidth ratio ranges between 0.064 and 0.105. SOLUTION: An interdigital electrode formed on a θ degree turned Y-cut lithium niobate signal crystal piezoelectric board is composed of a metal film primarily made of aluminum and uses a surface acoustic wave resonator in which the relation between the film thickness (h) of an electric finger and the pitch (p) of the electric finger is 0.12

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