CN111010142B - Annular non-reflection grating low-insertion-loss acoustic surface filter - Google Patents
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- CN111010142B CN111010142B CN201911297570.0A CN201911297570A CN111010142B CN 111010142 B CN111010142 B CN 111010142B CN 201911297570 A CN201911297570 A CN 201911297570A CN 111010142 B CN111010142 B CN 111010142B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides an annular reflection grating-free low-insertion-loss acoustic meter filter which is a loop formed by sequentially connecting a first interdigital transducer module, a second interdigital transducer module, a third interdigital transducer module and a fourth interdigital transducer module; the first interdigital transducer module, the second interdigital transducer module, the third interdigital transducer module and the fourth interdigital transducer module respectively comprise one or a plurality of cascaded interdigital transducers IDT; the invention relates to a method for realizing the acoustic wave propagation of an interdigital transducer, which is characterized in that acoustic ports of IDTs are connected, a Y matrix based on an STW-COM model is a background consisting of two acoustic ports and an electric port, the Y matrix is used for carrying out equivalent idea of the acoustic wave propagation, a Y3P module in an ADS is called, the Y matrix of 3 x 3 is assigned, and a sound source is limited to oscillate in a loop consisting of the IDTs of the interdigital transducer, so that the energy loss is reduced, a reflection grating is omitted, and the effect of inserting loss lower than that of a traditional structure acoustic meter filter is achieved.
Description
Technical Field
The invention relates to the field of surface acoustic wave filters, in particular to an annular non-reflection grating low-insertion-loss surface acoustic wave filter.
Background
The surface acoustic wave filter is a filter commonly used in modern communication systems, and has the advantages of small size, high stability, strong anti-interference capability, high selectivity and the like. The designed acoustic surface filter mainly comprises a delta function model, an equivalent circuit model, a COM model and the like, wherein the STW-COM model of Hashimoto-Abbott is a relatively accurate rapid simulation model. The performance of the acoustic surface filter at low frequency is good, but due to the influence of leakage wave, the insertion loss of the acoustic surface filter at high frequency is relatively large, so that the acoustic surface filter is gradually replaced by the bulk acoustic wave filter at high frequency, but the requirement of the bulk acoustic wave filter on the manufacturing process is relatively high, and therefore, the search for a high-frequency low-insertion-loss acoustic surface filter structure is a major point of research in the field of future acoustic surface filters.
Disclosure of Invention
Aiming at the defects in the prior art, the annular reflection grating-free low-insertion-loss acoustic surface filter provided by the invention can limit the acoustic waves to oscillate in a loop formed by interdigital transducer ends.
In order to achieve the above purpose, the invention adopts the technical scheme that:
the scheme provides an annular reflection grating-free low-insertion-loss acoustic meter filter which is a loop formed by sequentially connecting a first interdigital transducer module, a second interdigital transducer module, a third interdigital transducer module and a fourth interdigital transducer module;
the first interdigital transducer module, the second interdigital transducer module, the third interdigital transducer module and the fourth interdigital transducer module respectively comprise one or a plurality of cascaded interdigital transducers IDT;
a P3 acoustic port of a last interdigital transducer IDT in the first interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer IDT in the second interdigital transducer module, a P4 acoustic port of the last interdigital transducer IDT in the first interdigital transducer module is connected with a P2 acoustic port of the first interdigital transducer IDT in the second interdigital transducer module, a P3 acoustic port of the last interdigital transducer IDT in the second interdigital transducer module is connected with a P1 acoustic port of the first interdigital transducer IDT in the third interdigital transducer module, a P4 acoustic port of the last interdigital transducer IDT in the second interdigital transducer module is connected with a P2 acoustic port of the first interdigital transducer IDT in the third interdigital transducer module, the P3 sound port of the last interdigital transducer IDT in the third interdigital transducer module is connected with the P1 sound port of the first interdigital transducer IDT in the fourth interdigital transducer module, the P4 sound port of the last interdigital transducer IDT in the third interdigital transducer module is connected with the P1 sound port of the first interdigital transducer IDT in the fourth interdigital transducer module, the P3 sound port of the last interdigital transducer IDT in the fourth interdigital transducer module is connected with the P1 sound port of the first interdigital transducer IDT in the first interdigital transducer module, and the P4 sound port of the last interdigital transducer IDT in the fourth interdigital transducer module is connected with the P2 sound port of the first interdigital transducer IDT in the first interdigital transducer module;
in the first interdigital transducer module, the second interdigital transducer module, the third interdigital transducer module and the fourth interdigital transducer module, P2 sound ports of other interdigital transducers IDTs except the first interdigital transducer IDT are connected with a P4 sound port of the former cascaded interdigital transducer IDT, and P1 sound ports of other interdigital transducers except the first interdigital transducer IDT are connected with a P3 sound port of the former cascaded interdigital transducer IDT.
Further, P5 electric ports of all interdigital transducers IDT in the first interdigital transducer module and the third interdigital transducer module are connected and connected with the input port; the P6 electric port of each interdigital transducer IDT in the first interdigital transducer module and the third interdigital transducer module is grounded;
or the P6 electric ports of all interdigital transducers IDT in the first interdigital transducer module and the third interdigital transducer module are connected with each other and connected with the input port; and the P5 electric port of each interdigital transducer IDT in the first interdigital transducer module and the third interdigital transducer module is grounded.
Furthermore, the P6 electrical ports of the IDTs of the interdigital transducers in the second interdigital transducer module and the fourth interdigital transducer module are connected and connected with an output port; the P5 port of each interdigital transducer IDT in the second interdigital transducer module and the fourth interdigital transducer module is grounded;
or P5 electric ports of all interdigital transducers IDTs in the second interdigital transducer module and the fourth interdigital transducer module are connected and connected with an output port; and the P6 port of each interdigital transducer IDT in the second interdigital transducer module and the fourth interdigital transducer module is grounded.
Still further, the shape of the annular non-reflection grating low insertion loss acoustic surface filter is cuboid or cylindrical.
And further, fingers of all interdigital transducers IDTs in the rectangular annular reflection-grating-free low-insertion-loss acoustic meter filter are arrayed in a crossed manner in the vertical direction, and the input ends and the output ends of the IDTs are arrayed in a crossed manner.
And then stepping is carried out, fingers of all interdigital transducers IDTs in the vertical direction in the cylindrical annular reflection-grating-free low-insertion-loss acoustic meter filter are arranged in a crossed mode, and the input ends and the output ends of the interdigital transducers IDTs are arranged in a crossed mode.
The invention has the beneficial effects that:
the annular reflection grating-free low-insertion-loss acoustic surface filter is a loop formed by sequentially connecting a first interdigital transducer module, a second interdigital transducer module, a third interdigital transducer module and a fourth interdigital transducer module; the first interdigital transducer module, the second interdigital transducer module, the third interdigital transducer module and the fourth interdigital transducer module respectively comprise one or a plurality of cascaded interdigital transducers IDT; the acoustic ports of the interdigital transducers IDT are connected, and the electric ports of the interdigital transducers IDT are connected or grounded. The invention relates to a Y matrix based on an STW-COM model, which is a background consisting of two sound ports and an electric port, and the propagation of sound waves is equivalent by using the Y matrix, a Y3P module in ADS is called, the Y matrix of 3 x 3 is assigned, and a designed annular sound meter filter limits a sound source to vibrate in a loop formed by IDTs (interdigital transducers), so that the energy loss is reduced, a reflection grating is omitted, and the insertion loss effect lower than that of the traditional structure sound meter filter is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a circular acoustic surface filter according to the present invention.
Fig. 2 shows a filter formed by circularly connecting input/output IDTs according to the present embodiment.
Fig. 3 is a block diagram of modeling an IDT of an interdigital transducer in accordance with the present invention.
Fig. 4 is a schematic diagram of an input IDT structure of a loop filter in this embodiment.
Fig. 5 is a schematic diagram of an output IDT structure of a loop filter in this embodiment.
Fig. 6 is a diagram showing simulation results of a filter designed in Band 3.
FIG. 7 is a schematic view of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Examples
The invention aims to design a low insertion loss acoustic surface filter, which is an innovation of an acoustic surface filter structure based on an STW-COM model, a corresponding Y matrix is calculated by utilizing a P matrix in the STW-COM and then modularized, the Y matrix is packaged by utilizing ADS, so that modeling of an interdigital transducer (IDT) and a reflection grating is completed, and the IDT and the reflection grating are designed and connected by utilizing a circuit to realize a topological structure, so that the acoustic surface filter with a corresponding structure can be obtained. In a conventional SAW filter, two reflection gratings are added to two ends of an IDT, i.e., two reflection gratings are added to the IDT along the propagation direction of an acoustic wave. The invention relates to a Y matrix based on an STW-COM model, which is a background consisting of two sound ports and an electric port, and the invention designs an annular sound meter filter by using the idea of equivalent propagation of sound waves by using the Y matrix and calling a Y3P module in ADS to assign a value to the 3 x 3Y matrix, so that a sound source is limited to oscillate in a loop consisting of IDTs (interdigital transducers), thereby reducing energy loss, omitting a reflection grid and achieving the effect of lower insertion loss compared with the traditional structure sound meter filter.
As shown in fig. 1, the invention discloses an annular reflection grating-free low-insertion-loss acoustic meter filter, which is a loop formed by sequentially connecting a first interdigital transducer module, a second interdigital transducer module, a third interdigital transducer module and a fourth interdigital transducer module; the first interdigital transducer module, the second interdigital transducer module, the third interdigital transducer module and the fourth interdigital transducer module respectively comprise one or a plurality of cascaded interdigital transducers IDT; a P3 acoustic port of a last interdigital transducer (IDT) in the first interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer (IDT) in the second interdigital transducer module, a P4 acoustic port of a last interdigital transducer (IDT) in the first interdigital transducer module is connected with a P2 acoustic port of a first interdigital transducer (IDT) in the second interdigital transducer module, a P3 acoustic port of a last interdigital transducer in the second interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer (IDT) in the third interdigital transducer module, a P4 acoustic port of a last interdigital transducer in the second interdigital transducer module is connected with a P2 acoustic port of a first interdigital transducer in the third interdigital transducer module, a P3 acoustic port of a last interdigital transducer in the third interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer in the fourth interdigital transducer module, a P4 acoustic port of a last interdigital transducer in the third interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer in the fourth interdigital transducer module, and a P4 acoustic port of a last interdigital transducer in the first interdigital transducer module in the fourth interdigital transducer module is connected with a P1 acoustic port of the first interdigital transducer module; in the first interdigital transducer module, the second interdigital transducer module, the third interdigital transducer module and the fourth interdigital transducer module, P2 sound ports of other interdigital transducers except the first interdigital transducer IDT are connected with P4 sound ports of the former cascaded interdigital transducer IDT, and P1 sound ports of other interdigital transducers except the first interdigital transducer IDT are connected with P3 sound ports of the former cascaded interdigital transducer IDT.
P5 electric ports of all interdigital transducers IDTs in the first interdigital transducer module and the third interdigital transducer module are connected with each other and are connected with the input port; p6 electric ports of all interdigital transducers IDTs in the first interdigital transducer module and the third interdigital transducer module are grounded; or P6 electric ports of all interdigital transducers IDTs in the first interdigital transducer module and the third interdigital transducer module are connected and connected with the input port; and the P5 electric port of each interdigital transducer IDT in the first interdigital transducer module and the third interdigital transducer module is grounded.
P6 electric ports of all interdigital transducers IDTs in the second interdigital transducer module and the fourth interdigital transducer module are connected and connected with an output port; the P5 port of each interdigital transducer IDT in the second interdigital transducer module and the fourth interdigital transducer module is grounded; or P5 electric ports of all interdigital transducers IDT in the second interdigital transducer module and the fourth interdigital transducer module are connected and connected with an output port; and the P6 port of each interdigital transducer IDT in the second interdigital transducer module and the fourth interdigital transducer module is grounded.
The annular non-reflection grating low-insertion-loss acoustic surface filter is in a cuboid or cylindrical shape. The fingers of all interdigital transducers IDTs in the annular cuboid reflection-grating-free low-insertion-loss acoustic meter filter are arrayed in a finger crossing mode in the vertical direction, and the input ends and the output ends of the IDTs are arrayed in a crossing mode. The interdigital transducers IDT in the cylindrical annular reflection-grating-free low-insertion-loss acoustic surface filter are arranged in an interdigital mode in the vertical direction, and the input ends and the output ends of the interdigital transducers IDT are arranged in an interdigital mode.
In this embodiment, as shown in fig. 1, fig. 1 shows a basic structure of a circular acoustic surface filter, and each of IDTs is provided at upper, lower, left, and right sides, and P1 and P3 and P2 and P4 are connected between IDTs, and the physical meaning is the interconnection of acoustic ports. The input port (Num = 1) is connected to the P5 port of the upper and lower IDTs, and the output port (Num = 2) is connected to the P6 port of the left and right IDTs. The physical meaning of a P5, P6 port is an electrical port and it is not limited to the connections described above.
In this embodiment, as shown in fig. 2, fig. 2 is a preferred embodiment of the present invention, input IDTs and output IDTs are connected in a loop to form a filter, the upper and lower IDTs of the left loop are input IDTs, the left and right IDTs are output IDTs, and the input IDTs and the output IDTs are disposed in a crossing manner. The left loop and the right loop have the same structure but opposite polarity, namely, in the right loop, the input IDT is the same as the output IDT of the left loop, the output IDT is the same as the input IDT of the left loop, the two loops are connected in series for enhancing the out-of-band rejection, and the output end of the filter is connected in series with a 1nH inductor for matching.
In this embodiment, as shown in fig. 3, fig. 3 is a block diagram of modeling an IDT of an interdigital transducer, where P1, P2, P3, and P4 are two acoustic ports thereof, and P5 and P6 are two electrical ports thereof, and a pair of interdigital pairs (N) of the IDT, a structure period (P), a size (W) of an aperture, and a parameter (Nsum) of a set polarity can be input.
As shown in fig. 4, fig. 4 is an input IDT of a loop filter, and the input of the IDT of the interdigital transducer module can be composed of three IDTs, wherein the IDTs on two sides are the same, the structure is respectively 2 fingers, the electric period is 1.892 micrometers, the structure of the IDT in the middle is 16 fingers, and the electric period is 2.184 micrometers. It can be seen that the acoustic ports (P1, P2, P3, P4) are connected to each other, and the physical meaning is that the acoustic wave propagates between them, the electrical port P5 is grounded, and P6 is the input of the signal.
In the present embodiment, the input of the IDT of the interdigital transducer module is not limited to being composed of three IDTs.
As shown in fig. 5, fig. 5 is an output IDT of a loop filter, the output IDT of the IDT module is composed of three IDTs, the IDTs on two sides are the same, the structures of the IDTs are respectively 14 fingers, the electric period is 2.147 micrometers, the structure of the IDT in the middle is 8 fingers, and the electric period is 1.159 micrometers. The electrical port P5 is connected with the output end of the signal, and P6 is grounded.
In the present embodiment, the output of the IDT of the interdigital transducer module is not limited to being composed of three IDTs.
In this embodiment, the metallization rate of the IDTs in the interdigital transducer modules in fig. 4 and 5 is 50%, the polarities of adjacent fingers at the edges of the two IDTs are the same, the aperture is unified to 135.5 micrometers, and the acoustic ports at the edges of the IDTs are connected to the acoustic ports of the adjacent IDTs.
In this embodiment, as shown in fig. 6, fig. 6 is a simulation result of a filter designed in Band3, and the Q value is higher, the insertion loss is lower, and if a single loop is used, a lower insertion loss and a better flatness can be obtained.
In this embodiment, as shown in fig. 7, the annular reflection-grid-free low-insertion-loss acoustic surface filter is rectangular or cylindrical. As shown in the figure, four interdigital transducer modules IDT are arranged on four surfaces of the inner wall of the cuboid, the input (or output) interdigital transducer modules IDT on the upper surface and the lower surface are the same, and the output (or input) interdigital transducer modules IDT on the left surface and the right surface are the same. The acoustic wave is spread on the inner wall to form a loop, the IDT electric ports of the two input interdigital transducer modules are connected, and the IDT electric ports of the two output interdigital transducer modules are connected. Cylindrical like, they have in common the characteristic that the input and output interdigital transducer modules IDT are arranged crosswise.
In this embodiment, the annular reflection-grating-free low-insertion-loss acoustic surface filter is not limited to the above structure and parameters.
Claims (6)
1. The annular reflection grating-free low-insertion-loss acoustic meter filter is characterized in that the annular reflection grating-free low-insertion-loss acoustic meter filter is a loop formed by sequentially connecting a first interdigital transducer module, a second interdigital transducer module, a third interdigital transducer module and a fourth interdigital transducer module;
the first interdigital transducer module, the second interdigital transducer module, the third interdigital transducer module and the fourth interdigital transducer module respectively comprise one or a plurality of cascaded interdigital transducers IDT;
a P3 acoustic port of a last interdigital transducer (IDT) in the first interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer (IDT) in the second interdigital transducer module, a P4 acoustic port of a last interdigital transducer (IDT) in the first interdigital transducer module is connected with a P2 acoustic port of a first interdigital transducer (IDT) in the second interdigital transducer module, a P3 acoustic port of a last interdigital transducer in the second interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer (IDT) in the third interdigital transducer module, a P4 acoustic port of a last interdigital transducer in the second interdigital transducer module is connected with a P2 acoustic port of a first interdigital transducer in the third interdigital transducer module, a P3 acoustic port of a last interdigital transducer in the third interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer in the fourth interdigital transducer module, a P4 acoustic port of a last interdigital transducer in the third interdigital transducer module is connected with a P1 acoustic port of a first interdigital transducer in the fourth interdigital transducer module, and a P4 acoustic port of a last interdigital transducer in the first interdigital transducer module in the fourth interdigital transducer module is connected with a P1 acoustic port of the first interdigital transducer module;
in the first interdigital transducer module, the second interdigital transducer module, the third interdigital transducer module and the fourth interdigital transducer module, P2 sound ports of other interdigital transducers IDTs except the first interdigital transducer IDT are connected with a P4 sound port of the former cascaded interdigital transducer IDT, and P1 sound ports of other interdigital transducers except the first interdigital transducer IDT are connected with a P3 sound port of the former cascaded interdigital transducer IDT.
2. The annular reflection grating-free low-insertion-loss acoustic surface filter of claim 1, wherein the P5 electrical port of each of the first and third interdigital transducer modules is connected to and connected to the input port; p6 electric ports of all interdigital transducers IDTs in the first interdigital transducer module and the third interdigital transducer module are grounded;
or P6 electric ports of all interdigital transducers IDTs in the first interdigital transducer module and the third interdigital transducer module are connected and connected with the input port; and the P5 electric port of each interdigital transducer IDT in the first interdigital transducer module and the third interdigital transducer module is grounded.
3. The annular reflection grating-free low-insertion-loss acoustic surface filter of claim 1, wherein the P6 electrical ports of the IDTs in the second IDT module and the fourth IDT module are connected and connected with an output port; the P5 port of each interdigital transducer IDT in the second interdigital transducer module and the fourth interdigital transducer module is grounded;
or P5 electric ports of all interdigital transducers IDT in the second interdigital transducer module and the fourth interdigital transducer module are connected and connected with an output port; and the P6 port of each interdigital transducer IDT in the second interdigital transducer module and the fourth interdigital transducer module is grounded.
4. The annular reflectionless grating low-insertion-loss acoustic surface filter of claim 1, wherein the annular reflectionless grating low-insertion-loss acoustic surface filter is in the shape of a cuboid or a cylinder.
5. The annular reflection grating-free low-insertion-loss acoustic surface filter according to claim 4, wherein fingers of each interdigital transducer IDT in the rectangular parallelepiped annular reflection grating-free low-insertion-loss acoustic surface filter are arranged in a vertical direction and a vertical direction, and an input end and an output end of each interdigital transducer IDT are arranged in a crossed manner.
6. The annular reflectionless low-insertion-loss SAW filter of claim 4, wherein the interdigital transducers IDTs are arranged in a manner of interdigital fingers vertically and crosswise, and the input ends and the output ends of the IDTs are arranged in a manner of interdigital fingers.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4247836A (en) * | 1978-02-23 | 1981-01-27 | U.S. Philips Corporation | Acoustic wave devices |
| CN1361591A (en) * | 2000-11-29 | 2002-07-31 | 株式会社村田制作所 | Sound surface wave filter |
| CN1389017A (en) * | 2000-06-30 | 2003-01-01 | 富士通媒体装置株式会社 | Surface acoustic wave device |
| JP2003234636A (en) * | 2002-02-08 | 2003-08-22 | Toshiba Corp | Surface acoustic wave filter device |
| JP2007110542A (en) * | 2005-10-14 | 2007-04-26 | Kyocera Corp | Surface acoustic wave filter and communication apparatus provided therewith |
| CN103078603A (en) * | 2013-02-06 | 2013-05-01 | 中国电子科技集团公司第二十六研究所 | Surface acoustic wave filter with high power endurance |
| EP2871474A1 (en) * | 2013-11-08 | 2015-05-13 | pro.micron GmbH & Co.KG | SAW sensor based on Fabry-Perot type resonator |
| CN107547064A (en) * | 2016-06-24 | 2018-01-05 | 株式会社村田制作所 | SAW filter, duplexer and multiplexer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7569971B2 (en) * | 2007-10-02 | 2009-08-04 | Delaware Capital Formation, Inc. | Compensation of resonators for substrate and transducer asymmetry |
-
2019
- 2019-12-17 CN CN201911297570.0A patent/CN111010142B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4247836A (en) * | 1978-02-23 | 1981-01-27 | U.S. Philips Corporation | Acoustic wave devices |
| CN1389017A (en) * | 2000-06-30 | 2003-01-01 | 富士通媒体装置株式会社 | Surface acoustic wave device |
| CN1361591A (en) * | 2000-11-29 | 2002-07-31 | 株式会社村田制作所 | Sound surface wave filter |
| JP2003234636A (en) * | 2002-02-08 | 2003-08-22 | Toshiba Corp | Surface acoustic wave filter device |
| JP2007110542A (en) * | 2005-10-14 | 2007-04-26 | Kyocera Corp | Surface acoustic wave filter and communication apparatus provided therewith |
| CN103078603A (en) * | 2013-02-06 | 2013-05-01 | 中国电子科技集团公司第二十六研究所 | Surface acoustic wave filter with high power endurance |
| EP2871474A1 (en) * | 2013-11-08 | 2015-05-13 | pro.micron GmbH & Co.KG | SAW sensor based on Fabry-Perot type resonator |
| CN107547064A (en) * | 2016-06-24 | 2018-01-05 | 株式会社村田制作所 | SAW filter, duplexer and multiplexer |
Non-Patent Citations (4)
| Title |
|---|
| Ventsislav M. Yantchev等.Coupling-of-modes_analysis_of_STW_resonators_including_loss_mechanism.2002,第49卷(第3期),331-336. * |
| 王玄洋.声表面波器件微制造技术研究.2016,(第02期),I135-309. * |
| 苏波.基于有限长FEM/BEM提取COM参量.2016,(第03期),I135-1059. * |
| 薛浩.声表面波滤波器件研究.2023,(第01期),I135-1021. * |
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