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公开(公告)号：US11843367B2
公开(公告)日：2023-12-12
申请号：US16984158
申请日：2020-08-04
发明人： Koji Nosaka
CPC分类号： H03H9/6406 , H03H9/58 , H03H9/6433 , H03H9/6489 , H03H9/68 , H03H9/703 , H03H9/725 , H04B1/04 , H04B1/16
摘要： A filter device according to an embodiment of the present disclosure includes a first filter and a second filter that are connected in parallel between a first terminal and a second terminal. The first filter includes multiple series arm resonators. The series arm resonators are disposed in series in a path from the first terminal via the first filter to the second terminal. The series arm resonators include a first series arm resonator and a second series arm resonator. Under a condition that a value obtained by dividing a difference between an antiresonance frequency and a resonance frequency of each series arm resonator by the resonance frequency is defined as a fractional bandwidth, a first fractional bandwidth of the first series arm resonator is different from a second fractional bandwidth of the second series arm resonator.
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公开(公告)号：US20220255534A1
公开(公告)日：2022-08-11
申请号：US17591809
申请日：2022-02-03
摘要： A delay line for radio frequency circuits comprises a piezoelectric substrate, a transmission single phase unidirectional transducer (SPUDT) disposed on the piezoelectric substrate, and a receive SPUDT disposed on the piezoelectric substrate and separated from the transmission SPUDT in a direction of transmission of a main acoustic wave mode utilized by the transmission SPUDT.
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公开(公告)号：US20200162057A1
公开(公告)日：2020-05-21
申请号：US16656902
申请日：2019-10-18
发明人： Shinichi NAKAMURA
摘要： A transmission filter includes a transmission filter circuit and an additional circuit. The transmission filter circuit is provided between a first terminal and a second terminal. Between the first terminal and the second terminal, the additional circuit is connected in parallel with at least a portion of the transmission filter circuit. The additional circuit includes an IDT electrode group including a plurality of IDT electrodes located next to each other in an acoustic wave propagation direction and two reflectors that sandwich the IDT electrode group and having different numbers of pairs of electrode fingers.
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公开(公告)号：US4353043A
公开(公告)日：1982-10-05
申请号：US197370
申请日：1980-10-15
申请人： David J. Gunton
发明人： David J. Gunton
CPC分类号： H03H9/0285 , H03H9/02708 , H03H9/02771 , H03H9/02779 , H03H9/02795
摘要： A two track surface acoustic wave device is provided with a phase plate interposed between input and output transducers on one of the two tracks. An electrical coupler is connected across the output transducers to produce a sum signal at at least one of its outputs corresponding to surface waves making a single transit of each track. The coupler combines other signals having a different phase relationship--eg those corresponding to a triple transit of each track to give a null at one of these outputs. The coupler is connected into matched output loads to provide mutual isolation at its inputs. Tracks of different length may be used instead of the phase plate. Instead of electrical coupling, acoustic coupling may be provided between the two tracks to produce a similar result.
摘要翻译： 双轨声表面波装置在两个轨道之一上设置有夹在输入和输出换能器之间的相位板。 电耦合器跨过输出变换器连接，以在其输出中的至少一个输出处产生和信号，该信号对应于形成每个磁道的单个传送的表面波。 耦合器组合具有不同相位关系的其他信号，例如对应于每个轨道的三次转接的那些信号，以在这些输出之一处给出零。 耦合器连接到匹配的输出负载，以在其输入端提供相互隔离。 可以使用不同长度的轨道来代替相位板。 代替电耦合，可以在两个轨道之间提供声耦合以产生类似的结果。
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公开(公告)号：US4342971A
公开(公告)日：1982-08-03
申请号：US221279
申请日：1980-12-30
CPC分类号： H03H9/423
摘要： A surface acoustic wave variable time delay includes a surface acoustic wave device (10) which is secured within a housing (30). The device (10) is provided with an input transducer (12) and an output transducer (16) which are respectfully connected to input lines (14) and output lines (18). An electrostrictive element (20) is secured within housing (30) between an end of device (10) and an interior wall (34) of housing (30). A control signal is applied to electrodes (22, 24) connected to element (20) to vary the size thereof. Element (20) applies a mechanical force to the surface acoustic wave device (10) to alter the distance between the input transducer (12) and output transducer (16) to thereby control the delay time between the signal supplied to the input lines (14) and the output signal at the output lines (18).
摘要翻译： 表面声波可变时间延迟包括固定在壳体（30）内的表面声波装置（10）。 设备（10）设置有输入换能器（12）和输出换能器（16），其输出线连接到输入线（14）和输出线（18）。 一个电致伸缩元件（20）固定在装置（10）的端部和壳体（30）的内壁（34）之间的壳体（30）内。 控制信号施加到连接到元件（20）的电极（22,24）以改变其尺寸。 元件（20）向弹性表面波装置（10）施加机械力以改变输入传感器（12）和输出变换器（16）之间的距离，从而控制提供给输入线（14）的信号之间的延迟时间 ）和输出线（18）处的输出信号。
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6.发明授权公开(公告)号：US11283428B2
公开(公告)日：2022-03-22
申请号：US16746996
申请日：2020-01-20
发明人： Koji Nosaka
摘要： A radio frequency (RF) filter having a first passband and including a first circuit connected to a first node and a second node disposed on a path that connects a first terminal and a second terminal, and a second circuit connected to the first node and the second node. The first circuit includes a first filter having a second passband that includes a portion of a frequency range of the first passband and a bandwidth narrower than a bandwidth of the first passband. The second circuit includes a second filter having a third passband that includes a portion of a frequency range of the first passband and has a bandwidth narrower than the bandwidth of the first passband. The RF filter also includes a first phase shifter connected to a first terminal of the second filter; and a second phase shifter connected to a second terminal of the second filter.
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公开(公告)号：US20190356298A1
公开(公告)日：2019-11-21
申请号：US16529877
申请日：2019-08-02
发明人： Koichiro KAWASAKI
摘要： A surface acoustic wave device includes a piezoelectric substrate and functional elements on a first surface of the piezoelectric substrate. At least a portion of the functional elements includes an interdigital transducer (IDT) electrode, and a surface acoustic wave resonator is defined by the piezoelectric substrate and the IDT electrode. A portion of a wiring pattern connecting a first functional element and a second functional element is on a second surface different from the first surface of the piezoelectric substrate.
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公开(公告)号：US4775846A
公开(公告)日：1988-10-04
申请号：US97169
申请日：1987-09-16
申请人： Takashi Shiba , Yuji Fujita , Toshimitsu Takahashi , Jun Yamada
发明人： Takashi Shiba , Yuji Fujita , Toshimitsu Takahashi , Jun Yamada
CPC分类号： H03H9/6423 , H03H9/14505
摘要： In order to present an asymmetric frequency characteristic in an unidirectional acoustic surface wave device with a simple external phase shifter, a transducer formed on a substrate have three interaction areas (acoustic sources) defined by different three electrodes, first electrode being common, second electrode being connected to one end of the phase shifter, third electrode being connected to another end of the phase shifter, and distances between interaction areas being unequal to 2n (n:integer).
摘要翻译： 为了在具有简单的外部移相器的单向声表面波装置中呈现非对称频率特性，形成在基板上的换能器具有由不同的三个电极限定的三个相互作用区域（声源），第一电极是共同的，第二电极是 连接到移相器的一端，第三电极连接到移相器的另一端，并且相互作用区域之间的距离不等于2n（n：整数）。
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公开(公告)号：US4639697A
公开(公告)日：1987-01-27
申请号：US650019
申请日：1984-09-13
CPC分类号： H03H9/02834 , H03H9/68
摘要： A surface acoustic wave (SAW) device provides a phase shift and a first predetermined phase shift variation as a function of temperature. A passive network including a passive, reactive component is thermally and electrically coupled to the SAW device. An electrical characteristic of the component has a predetermined variation as a function of the temperature of the reactive component which provides the network with a second, predetermined phase variation as a function of temperature to compensate for the first predetermined phase variation as a function of temperature provided from the surface acoustic wave device. With this arrangement, the phase shift provided from the surface acoustic wave device is substantially invariant with temperature.
摘要翻译： 表面声波（SAW）装置提供相移和作为温度的函数的第一预定相移变化。 包括无源的无源分量的无源网络热和电耦合到SAW器件。 组件的电特性具有作为无功部件的温度的函数的预定变化，其提供作为温度的函数的第二预定相位变化的网络，以补偿作为提供的温度的函数的第一预定相位变化 从声表面波装置。 通过这种布置，从表面声波装置提供的相移基本上与温度不变。
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10.发明授权Surface acoustic wave passive transponder having amplitude and phase-modifying surface pads 失效表面声波无源应答器具有振幅和相位修正表面焊盘
公开(公告)号：US4625207A
公开(公告)日：1986-11-25
申请号：US509526
申请日：1983-06-30
申请人： Halvor Skeie
发明人： Halvor Skeie
CPC分类号： G06K19/0675 , G01S13/755 , G01S13/34
摘要： A passive transponder for use in an interrogation/transponder system comprises a substrate having a substrate surface defining a path of travel for surface acoustic waves; a launch transducer element arranged on the surface for converting interrogating signals into surface acoustic waves which propagate along the path of travel; a plurality of tap transducer elements arranged on the surface at spaced intervals along the path of travel for converting surface acoustic waves into respective output signals; and a circuit, connected to the tap transducer elements, for combining the output signals of these transducer elements to form reply signals. In order to control the delay time from transducer element to transducer element, one or more "delay pads" are provided on the substrate surface between these transducer elements.
摘要翻译： 用于询问/应答器系统的无源应答器包括具有限定表面声波的行进路径的衬底表面的衬底; 布置在表面上的发射换能器元件，用于将询问信号转换成沿行进路径传播的表面声波; 多个分接换能器元件沿着行进路径以间隔的间隔布置在表面上，用于将表面声波转换成相应的输出信号; 以及连接到分接头换能器元件的电路，用于组合这些换能器元件的输出信号以形成回复信号。 为了控制从换能器元件到换能器元件的延迟时间，在这些换能器元件之间的衬底表面上提供一个或多个“延迟焊盘”。
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