-
公开(公告)号：US09203378B2
公开(公告)日：2015-12-01
申请号：US13845547
申请日：2013-03-18
发明人： Joji Fujiwara , Tetsuya Tsurunari , Hiroyuki Nakamura , Rei Goto
CPC分类号： H03H9/725 , H03H9/0023 , H03H9/0038 , H03H9/0071 , H03H9/6436 , H03H9/6476 , H03H9/70
摘要： An elastic wave filter includes first and second longitudinally coupled elastic wave filters. The first filter includes a first pair of grating reflectors, first to fifth IDT electrodes arranged in ordinal order between the grating reflectors along a propagation direction of elastic waves, a first unbalanced terminal, and first and second balanced terminals. The second filter has a second unbalanced terminal, and third and fourth balanced terminals, the first and second unbalanced terminals being electrically connected to each other, the first and third balanced terminals being electrically connected to a first JO terminal, and the second and fourth balanced terminals being electrically connected to a second JO terminal. The first and second balanced terminals, and the third and fourth balanced terminals, output signals opposite in phase to each other. A first signal at the first JO terminal is opposite in phase to a second signal at the second IO terminal.
摘要翻译： 弹性波滤波器包括第一和第二纵向耦合的弹性波滤波器。 第一滤光器包括第一对光栅反射器，沿着弹性波的传播方向在光栅反射器之间按顺序布置的第一至第五IDT电极，第一不平衡端子以及第一和第二平衡端子。 第二滤波器具有第二不平衡端子，第三和第四平衡端子，第一和第二不平衡端子彼此电连接，第一和第三平衡端子电连接到第一JO端子，第二和第四平衡端子 端子电连接到第二JO端子。 第一和第二平衡端子以及第三和第四平衡端子输出信号彼此相位相反。 第一JO端子处的第一信号与第二IO端子处的第二信号相位相反。
-
公开(公告)号：US20160105158A1
公开(公告)日：2016-04-14
申请号：US14969222
申请日：2015-12-15
发明人： Joji Fujiwara , Toru Jibu , Tomoya Komatsu , Hiroyuki Nakamura , Tetsuya Tsurunari , Kazunori Nishimura
CPC分类号： H03H9/6413 , H03H9/0028 , H03H9/0085 , H03H9/542 , H03H9/6433 , H03H9/6483 , H03H9/725 , H04B1/40
摘要： An electronic device includes a main circuit connected between an input terminal and an output terminal, and an auxiliary circuit connected in parallel to the main circuit between the input terminal and the output terminal. The main circuit includes a filter having a first passband and a stopband. The auxiliary circuit has a passing characteristic that allows a signal having a frequency in a certain frequency band inside the stopband to pass through the auxiliary circuit. The main circuit is configured to output a main signal in response to an input signal. The auxiliary circuit is configured to output an auxiliary signal in response to the input signal. The main signal and the auxiliary signal contain phase components opposite to each other in the certain frequency band inside the stopband. This electronic device has an attenuation amount in the stopband.
摘要翻译： 电子设备包括连接在输入端子和输出端子之间的主电路以及与输入端子和输出端子之间的主电路并联连接的辅助电路。 主电路包括具有第一通带和阻带的滤波器。 辅助电路具有允许在阻带内部的某一频带中的频率的信号通过辅助电路的通过特性。 主电路被配置为响应于输入信号输出主信号。 辅助电路被配置为响应于输入信号输出辅助信号。 主信号和辅助信号在阻带内的某个频带中包含彼此相反的相位分量。 该电子设备在阻带中具有衰减量。
-
3.发明授权公开(公告)号：US09203376B2
公开(公告)日：2015-12-01
申请号：US13774811
申请日：2013-02-22
CPC分类号： H03H9/6483 , H03H9/0222 , H03H9/02992 , H03H9/25 , H03H9/64 , H03H9/725
摘要： A ladder-type surface acoustic wave filter includes a first series resonator having the lowest resonance frequency among a plurality of series resonators; and a second series resonator having a resonance frequency higher than the first series resonator. The film thickness of a dielectric film in the region where the first series resonator is formed is larger than that of a dielectric film in the region where the second series resonator is formed.
摘要翻译： 梯型声表面波滤波器包括多个串联谐振器中具有最低谐振频率的第一串联谐振器; 以及具有高于第一串联谐振器的谐振频率的第二串联谐振器。 形成第一串联谐振器的区域中的电介质膜的膜厚大于形成第二串联谐振器的区域中的电介质膜的膜厚。
-
公开(公告)号：US20150333731A1
公开(公告)日：2015-11-19
申请号：US14809994
申请日：2015-07-27
IPC分类号： H03H9/25
CPC分类号： H03H9/25 , H01L41/047 , H03H9/02818 , H03H9/02992
摘要： An elastic wave device includes an interdigital transducer (IDT) electrode in contact with a piezoelectric substrate having a bus bar electrode region including one of a first bus bar electrode and a second bus bar electrode of the IDT electrode, an alternately disposed region where first electrode fingers are alternately disposed with second electrode fingers of the IDT electrode, and an intermediate region including one of the first electrode fingers and the second electrode fingers. A dielectric film is formed in at least part of the intermediate region and in contact with an upper surface of the IDT electrode. The dielectric film includes a medium in which an acoustic velocity of a transverse wave propagating in the dielectric film is lower than an acoustic velocity of a main elastic wave of the alternately disposed region. The dielectric film is not formed in the alternately disposed region.
摘要翻译： 弹性波装置包括与具有包括IDT电极的第一汇流条电极和第二汇流条电极之一的汇流条电极区域的压电基板相接触的指数间换能器（IDT）电极，交替设置的区域，其中第一电极 手指交替地设置有IDT电极的第二电极指，以及包括第一电极指和第二电极指中的一个的中间区。 电介质膜形成在中间区域的至少一部分中并与IDT电极的上表面接触。 电介质膜包括其中在电介质膜中传播的横波的声速低于交替设置区域的主弹性波的声速的介质。 电介质膜不形成在交替设置的区域中。
-
公开(公告)号：US20160268997A1
公开(公告)日：2016-09-15
申请号：US15067304
申请日：2016-03-11
IPC分类号： H03H9/25
CPC分类号： H03H9/25 , H03H9/02559 , H03H9/02834 , H03H9/6496 , H03H9/725
摘要： An acoustic wave element comprising a lithium tantalate substrate having the Euler angles (φ, θ, ψ), a first component φ satisfying 10°≦φ≦50°; and an electrode disposed on the lithium tantalate substrate and configured to excite a main acoustic wave of wavelength λ, the electrode having a density ρM satisfying ρM≧ρTi where ρTi represents a density of titanium (Ti), and a thickness hM of the electrode satisfies 0.141×exp(0.075ρM)λ≦hM≦0.134λ Embodiments of the present disclosure minimize a thickness of the electrode and suppress a spurious Rayleigh wave signal.
摘要翻译： 声波元件包括具有欧拉角（φ，θ，ψ），满足10°≤φ≤50°的第一分量φ的钽酸锂基底; 和设置在钽酸锂基板上并配置为激发波长λ的主声波的电极，该密度ρM的电极满足ρM≥ρTi，其中ρTi表示钛（Ti）的密度，并且电极的厚度hM满足 0.141×exp（0.075ρM）λ≤hM≤0.134λ本发明的实施例使电极的厚度最小化并抑制虚假瑞利波信号。
-
公开(公告)号：US20150243873A1
公开(公告)日：2015-08-27
申请号：US14708762
申请日：2015-05-11
IPC分类号： H01L41/047
CPC分类号： H01L41/047 , H03H9/02559 , H03H9/02834 , H03H9/02858 , H03H9/02881 , H03H9/02984 , H03H9/02992 , H03H9/54
摘要： In an acoustic wave device, an unnecessary high-order transverse mode wave is suppressed. The acoustic wave device includes a piezoelectric substrate, at least one pair of interdigital transducer (IDT) electrodes formed on the piezoelectric substrate, and a dielectric film which covers at least a part of the piezoelectric substrate and the IDT electrodes. The IDT electrodes each have a plurality of electrode fingers interleaved with each other. An acoustic velocity of an acoustic wave in the area in which the electrode fingers are interleaved with each other is greater than an acoustic velocity of an acoustic wave in an edge area including end portions of the electrode fingers.
摘要翻译： 在声波装置中，抑制不必要的高次横模波。 声波装置包括压电基板，形成在压电基板上的至少一对叉指式换能器（IDT）电极和覆盖压电基板和IDT电极的至少一部分的电介质膜。 IDT电极各自具有彼此交错的多个电极指。 电极指彼此交错的区域中的声波的声速大于包括电极指的端部的边缘区域中的声波的声速。
-
7.发明申请公开(公告)号：US20160301384A1
公开(公告)日：2016-10-13
申请号：US15184354
申请日：2016-06-16
CPC分类号： H03H9/725 , H03H9/02834 , H03H9/14588 , H03H9/205 , H03H9/56 , H03H9/568 , H03H9/605 , H03H9/6483 , H03H9/70 , H03H9/706
摘要： In a ladder-type elastic wave filter, a resonance frequency of a second parallel resonator is higher than that of a series resonator and lower than an antiresonance frequency of a series resonator. With this configuration, an attenuation pole is formed by the second parallel resonator at a frequency region lower than an attenuation pole formed by the series resonator in a frequency region higher than the passband of the ladder-type elastic wave filter.
摘要翻译： 在梯型弹性波滤波器中，第二并联谐振器的谐振频率高于串联谐振器的谐振频率，并且低于串联谐振器的反共振频率。 利用这种配置，在比梯形弹性波滤波器的通带高的频率区域中，在低于由串联谐振器形成的衰减极点的频率区域处，由第二并联谐振器形成衰减极。
-
8.发明申请公开(公告)号：US20160226464A1
公开(公告)日：2016-08-04
申请号：US15093893
申请日：2016-04-08
发明人： Joji Fujiwara , Yosuke Hamaoka , Tetsuya Tsurunari , Hidekazu Nakanishi , Hiroyuki Nakamura , Rei Goto , Hidehito Shimizu
CPC分类号： H03H9/02984 , H03H9/02559 , H03H9/02574 , H03H9/02842 , H03H9/14544 , H03H9/64
摘要： An acoustic wave element that includes a piezoelectric body, an aluminum oxide layer disposed on the piezoelectric body, an electrode disposed on the aluminum oxide layer, and a protection film disposed on the aluminum oxide layer to cover the electrode. The piezoelectric body is formed of a piezoelectric material based on lithium niobate having Euler angles (φ, θ, ψ). The aluminum oxide layer is formed of Al2O3. The electrode is configured to excite a main acoustic wave having a wavelength λ. The protection film has a film thickness greater than 0.27λ. The Euler angles satisfy either ψ≦−2φ−3° or −2φ+3°≦ψ and both of −100°≦θ≦−60° and 2φ−2°≦ψ≦2φ+2°.
摘要翻译： 声波元件包括压电体，设置在压电体上的氧化铝层，设置在氧化铝层上的电极以及设置在氧化铝层上以覆盖电极的保护膜。 压电体由基于具有欧拉角（φ，θ，ψ）的铌酸锂的压电材料形成。 氧化铝层由Al2O3形成。 电极被配置为激发具有波长λ的主声波。 保护膜的膜厚度大于0.27λ。 欧拉角满足ψ≤2φ-3°或-2φ+ 3°≤ψ，并且均为-100°≤θ≤-60°和2φ-2°≤ψ≤2φ+ 2°。
-
公开(公告)号：US09294071B2
公开(公告)日：2016-03-22
申请号：US14635220
申请日：2015-03-02
CPC分类号： H03H9/725 , H01P1/205 , H03H9/14535 , H03H9/205 , H03H9/25 , H03H9/6483 , H04B1/0057
摘要： An antenna duplexer includes first and second filters connected to an antenna terminal. The first filter has a passband of a low frequency band. The second filter has a passband of a high frequency band. The second filter is a ladder-type filter including series-arm resonators and parallel-arm resonators. At least one parallel-arm resonator out of the parallel-arm resonators has a main resonance and an auxiliary resonance. Attenuation poles caused by the main resonance and the auxiliary resonance are within the low frequency band. This antenna duplexer has a high attenuation characteristic and a high isolation characteristic while maintaining a low insertion loss.
-
公开(公告)号：US20160072471A1
公开(公告)日：2016-03-10
申请号：US14943683
申请日：2015-11-17
发明人： Joji Fujiwara , Tetsuya Tsurunari , Hiroyuki Nakamura , Rei Goto
CPC分类号： H03H9/725 , H03H9/0023 , H03H9/0038 , H03H9/0071 , H03H9/6436 , H03H9/6476 , H03H9/70
摘要： An elastic wave filter has an unbalanced signal terminal, first and second balanced signal terminals, and first through fifth IDT electrodes arranged in ordinal order between a pair of grating reflectors. Wiring electrodes of the third and fifth IDT electrodes are disposed adjacent a ground electrode of the fourth IDT electrode, wiring electrodes of the second and third IDT electrodes are disposed adjacent one another, and ground electrodes of the first and second IDT electrodes are disposed adjacent one another. The unbalanced signal terminal is connected to the wiring electrodes of the first, third, and fifth IDT electrodes, and the first and second balanced signal terminals are connected to the wiring electrodes of the second and fourth IDT electrodes, respectively. A pitch gradation of pitch spacing between electrode fingers in each of the first, second, and third IDT electrodes on one side of a center line in the third IDT electrode is gradually reduced by a first spacing α, and a pitch gradation of pitch spacing between electrode fingers in each of the third, fourth, and fifth IDT electrodes on the other side of the center line is gradually reduced by a second spacing β (β≠α), as the distance from the center line increases.
摘要翻译： 弹性波滤波器具有不平衡信号端子，第一和第二平衡信号端子以及在一对光栅反射器之间以顺序排列的第一至第五IDT电极。 第三IDT电极和第五IDT电极的配线电极配置在第四IDT电极的接地电极附近，第二IDT电极和第三IDT电极的配线电极彼此相邻配置，第一IDT电极和第二IDT电极的接地电极相邻配置 另一个。 不平衡信号端子连接到第一，第三和第五IDT电极的布线电极，第一和第二平衡信号端子分别连接到第二和第四IDT电极的布线电极。 在第三IDT电极中的中心线的一侧的第一，第二和第三IDT电极中的每个第一，第二和第三IDT电极中的电极指之间的间距间距的间距等级逐渐减小第一间隔α，并且间距间距的间距等级 在中心线另一侧的第三，第四和第五IDT电极中的每一个中的电极指状物逐渐减小第二间距＆bgr; （＆bgr;≠α），因为距离中心线的距离增加。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.019 秒)