Surface acoustic wave device

Abstract

A surface acoustic wave device, comprising a first area and a second area. The surface acoustic wave device further comprises: at least one first jumper wiring; at least one first filter located in the first are; first grounding networks arranged in one-to-one correspondence to the first filters, all the first grounding networks being located in the first area; second filters located in the second area and arranged in one-to-one correspondence to the first filters; and second grounding networks arranged in one-to-one correspondence to the second filters, all the second grounding networks being located in the second area, wherein the first filters are electrically connected to the first grounding networks; the second filters are electrically connected to the second grounding networks; and the first jumper wiring spans the first area and the second area, the end of the first jumper wiring located in the first area is electrically connected to the first grounding networks, and the end located in the second area being electrically connected to the second grounding networks.

Description

Surface acoustic wave devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 28, 2023, with application number 202311607372.6, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of communication equipment, for example, to a surface acoustic wave device. Background Art

[0003] With the continuous advancement of wireless communication technology, such as the development of 5G New Radio (NR) technology, an increasing number of wireless frequency bands are being utilized. Selecting different frequency bands and reducing interference between them will become increasingly complex, thus increasing the challenges facing RF front-end components. Filters, as key components in the RF front-end, enable the selection of wireless signals for specific frequency bands and play a vital role in mobile communications, the Internet of Things, and virtual reality (VR) and augmented reality (AR). A duplexer or multiplexer, consisting of multiple transmit and receive filters, enables simultaneous transmission and reception in frequency division duplexing (FDD) coding. In the complex wireless spectrum environment of the future, they will have broader application prospects and greater market competitiveness.

[0004] With the continuous evolution of RF front-end integration technology, there will be higher requirements for the miniaturization of device design. In the entire RF link, the multiplexer mainly serves as the first or last stage transmission carrier. Reducing the insertion loss of the filter will have a direct impact on the sensitivity and signal-to-noise ratio of the receiving system. Improving the suppression of the transmitter on the receiver can greatly improve the anti-interference capability and enhance the communication quality.

[0005] To improve the suppression of multiplexers, most approaches use substrate-loaded inductors to shift the zero point of the resonator and improve suppression. However, due to the low Q value of the inductor, this can have a detrimental effect on the multiplexer's passband, affecting overall insertion loss. Another approach is to connect phase shifters in parallel at the transmitter and receiver ends to cancel the signals transmitted from the transmitter link to the receiver link, thereby achieving high isolation at the receiver end. However, this method is not easy to miniaturize. A small number of approaches use loaded suppression resonators, which can only improve isolation in very narrow frequency bands. Due to the limitation of body waves, the resonator can only be moved from low frequencies to high frequencies, and the suppression of low frequencies is relatively weakened.

[0006] Summary of the Invention

[0007] The present application provides a surface acoustic wave device, which can improve the suppression degree of the filter on the basis of meeting the miniaturization of the surface acoustic wave device.

[0008] An embodiment of the present application provides a surface acoustic wave device, comprising: a first area and a second area; the surface acoustic wave device also comprises: at least one first jumper trace; at least one first filter located in the first area; a first ground network arranged in a one-to-one correspondence with the first filter, and all the first ground networks are located in the first area; a second filter located in the second area and arranged in a one-to-one correspondence with the first filter; a second ground network arranged in a one-to-one correspondence with the second filter, and all the second ground networks are located in the second area; the first filter is electrically connected to the first ground network; the second filter is electrically connected to the second ground network; the first jumper trace spans the first area and the second area, and the end of the first jumper trace located in the first area is electrically connected to the first ground network, and the end of the first jumper trace located in the second area is electrically connected to the second ground network.

[0009] In one embodiment, the first area includes at least two first filters and at least two first ground networks arranged in a one-to-one correspondence with the at least two first filters, and the second area includes at least two second filters and at least two second ground networks arranged in a one-to-one correspondence with the at least two second filters; the first filter and the second filter electrically connected to the same first jumper trace are a transmitting filter and a receiving filter, respectively.

[0010] In one embodiment, the first area includes at least two first filters and at least two first ground networks arranged in a one-to-one correspondence with the at least two first filters, and the second area includes at least two second filters and at least two second ground traces arranged in a one-to-one correspondence with the at least two second filters; the first filter and the second filter electrically connected to the same first jumper trace are both transmitting filters.

[0011] In one embodiment, the first area includes at least two first filters and at least two first ground networks arranged in a one-to-one correspondence with the at least two first filters, and the second area includes at least two second filters and at least two second ground networks arranged in a one-to-one correspondence with the at least two second filters; the first filter and the second filter electrically connected to the same first jumper trace are both receive filters.

[0012] In one embodiment, the first filter includes at least a first series resonator, a second series resonator, a third series resonator, a fourth series resonator, a first parallel resonator, a second parallel resonator, a third parallel resonator, and a fourth parallel resonator; both ends of the first series resonator, the second series resonator, the third series resonator, and the fourth series resonator are provided with a first connecting trace, and the first series resonator, the second series resonator, the third series resonator, and the fourth series resonator are connected in series between the input end and the output end of the first filter through the first connecting trace; the first end of the first parallel resonator is electrically connected to the first series resonator. and a first connecting trace between the second series resonator and the second series resonator, a first end of the second parallel resonator is electrically connected to the first connecting trace between the second series resonator and the third series resonator, a first end of the third parallel resonator is electrically connected to the first connecting trace between the third series resonator and the fourth series resonator, and a first end of the fourth parallel resonator is electrically connected to the first connecting trace on a side of the fourth series resonator away from the third series resonator; a second end of the first parallel resonator, a second end of the second parallel resonator, a second end of the third parallel resonator and a second end of the fourth parallel resonator are all electrically connected to the first ground network.

[0013] In one embodiment, the second filter includes at least a fifth series resonator, a sixth series resonator, a seventh series resonator, an eighth series resonator, a fifth parallel resonator, a sixth parallel resonator, and a seventh parallel resonator; second connecting traces are provided at both ends of the fifth series resonator, the sixth series resonator, the seventh series resonator, and the eighth series resonator of the second filter, and the fifth series resonator, the sixth series resonator, and the seventh series resonator are connected in series between the input and output ends of the second filter through the second connecting traces; a first end of the fifth parallel resonator is electrically connected to the second connecting trace between the fifth series resonator and the sixth series resonator, a first end of the sixth parallel resonator is electrically connected to the second connecting trace between the sixth series resonator and the seventh series resonator, and a first end of the seventh parallel resonator is electrically connected to the second connecting trace between the seventh series resonator and the eighth series resonator; and a second end of the fifth parallel resonator, a second end of the sixth parallel resonator, and a second end of the seventh parallel resonator are all electrically connected to the second ground network.

[0014] In one embodiment, the first jumper trace crosses over one of the first connecting traces, and the first jumper trace is isolated from the first connecting trace it crosses over by a jumper bridge; and the first jumper trace crosses over one of the second connecting traces, and the first jumper trace is isolated from the second connecting trace it crosses over by a jumper bridge.

[0015] In one embodiment, the second filter includes at least: a ninth series resonator, a tenth series resonator, an eleventh series resonator, a DMS resonator, an eighth parallel resonator, and a ninth parallel resonator; a third connecting trace is provided at both ends of the ninth series resonator, the DMS resonator, the tenth series resonator, and the eleventh series resonator; the ninth series resonator, the DMS resonator, the tenth series resonator, and the eleventh series resonator are connected in series between a receiving end and a transmitting end of the second filter through the third connecting trace; a first end of the eighth parallel resonator is electrically connected to the third connecting trace between the ninth series resonator and the DMS resonator; a first end of the ninth parallel resonator is electrically connected to the third connecting trace between the tenth series resonator and the eleventh series resonator; and a second end of the DMS resonator, the eighth parallel resonator, and the ninth parallel resonator are all electrically connected to a second ground network.

[0016] In one embodiment, the second filter is a receive filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] FIG1 is a schematic diagram of a circuit structure of a surface acoustic wave device provided in an embodiment of the present application;

[0019] FIG2 is a circuit layout of a surface acoustic wave device corresponding to FIG1 ;

[0020] FIG3 is a schematic diagram of the circuit structure of another surface acoustic wave device provided in an embodiment of the present application;

[0021] FIG4 is a circuit layout of a surface acoustic wave device corresponding to FIG3;

[0022] FIG5 is a schematic diagram of the circuit structure of another surface acoustic wave device provided in an embodiment of the present application;

[0023] FIG6 is a circuit layout of a surface acoustic wave device corresponding to FIG5;

[0024] FIG7 is a schematic diagram of a bridging structure of a surface acoustic wave device provided in an embodiment of the present application;

[0025] FIG8 is a schematic diagram of the circuit structure of another surface acoustic wave device provided in an embodiment of the present application;

[0026] FIG9 is a circuit layout of a surface acoustic wave device corresponding to FIG8;

[0027] FIG10 is a performance comparison diagram of the surface acoustic wave device shown in FIG2 and related technologies;

[0028] FIG. 11 is a performance comparison diagram of the surface acoustic wave device shown in FIG. 4 and related technologies. DETAILED DESCRIPTION

[0029] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] FIG1 is a schematic diagram of a circuit structure of a surface acoustic wave device provided in an embodiment of the present application, and FIG2 is a circuit layout of a surface acoustic wave device corresponding to FIG1. ​​With reference to FIG1 and FIG2, the surface acoustic wave device 00 includes: a circuit layout of a surface acoustic wave device in a first area A1 and a second area A2; the surface acoustic wave device 00 also includes: at least one first jumper trace B1; at least one first filter 10 located in the first area A1; a first ground network G1 provided in one-to-one correspondence with the first filter 10, and all first ground networks G1 are located in the first area A1; and a first ground network G1 located in the second area A2. And the second filter 20 is set in a one-to-one correspondence with the first filter 10; the second ground traces G2 are set in a one-to-one correspondence with the second filter 20, and all the second ground traces G2 are located in the second area A2; the first filter 10 is electrically connected to the first ground network G1; the second filter 20 is electrically connected to the second ground network G2; the first jumper trace B1 spans the first area A1 and the second area A2, and the end of the first jumper trace B1 located in the first area A1 is electrically connected to the first ground network G1, and the end of the first jumper trace B1 located in the second area A2 is electrically connected to the second ground network G2.

[0032] Figures 1 and 2 exemplarily illustrate a situation where the first area A1 includes a first filter 10 and the second area A2 correspondingly includes a second filter 20. In this case, one of the filters is a transmit filter TX and the other is a receive filter RX, that is, the surface acoustic wave device 00 is a duplexer. For example, the first filter 10 can be set as the transmit filter TX and the second filter 20 as the receive filter RX. In this case, the input end of the first filter 10 is the signal input end RIN of the surface acoustic wave device 00, and the output end of the first filter 10 is the antenna end ANT. The surface acoustic wave device 00 can transmit radio frequency signals from the antenna end ANT. The receiving end of the second filter 20 is the antenna end ANT, and the output end of the second filter 20 is the output end ROT of the surface acoustic wave device 00. It can receive external radio frequency signals from the antenna end ANT and transmit the radio frequency signals to the signal output end ROT of the surface acoustic wave device 00. The second filter 20 also includes a ground terminal, wherein the first filter 10 is electrically connected to the first ground network G1 in the area where it is located. It can be considered that the ground terminal of the first filter 10 is electrically connected to the first ground network G1. Similarly, the second filter 20 is electrically connected to the second ground trace G2 in its area, which can be considered as the ground end of the second filter 20 being electrically connected to the second ground network G1. The first ground network G1 and the second ground network G2 are both electrically connected to the external ground terminal GND.

[0033] The first jumper trace B1 can be set in a one-to-one correspondence with the first filter 10. In some feasible embodiments, the number of the first jumper traces B1 can be less than the number of the first filters 10, and the embodiments of the present application do not limit this. The first jumper trace B1 can span the first area A1 and the second area A2, so that the end thereof located in the first area A1 can be electrically connected to the first ground network G1, and the end thereof located in the second area A2 can be electrically connected to the second ground network G1. The first ground network G1 and the second ground network G1 located in the two areas are electrically connected through the first jumper trace B1, thereby realizing a common ground connection between the first filter 10 and the second filter 20. Tests have shown that the common ground connection between the first filter 10 and the second filter 20 can effectively improve the noise signal suppression degree of the surface acoustic wave device 00, and can improve the isolation degree of the surface acoustic wave device 00, and can improve the signal suppression performance of the surface acoustic wave device 00.

[0034] The surface acoustic wave device provided in the embodiment of the present application connects the two filters in the surface acoustic wave device to a common ground by bridging using a first jumper line, which can effectively improve the suppression and isolation of the surface acoustic wave device, thereby effectively improving the signal suppression performance and comprehensive performance of the surface acoustic wave device, and can meet the miniaturization design of the surface acoustic wave device.

[0035] For example, when the surface acoustic wave device is a multiplexer, the first ground network G1 and the second ground network G2 can also be set to be electrically connected. The types of the multiple first filters 10 can be the same, that is, they can all be transmit filters TX, and in this case, the corresponding multiple second filters 20 are all receive filters. Alternatively, the types of the multiple first filters 10 can be different, that is, there can be transmit filters TX and receive filters RX among the multiple first filters 10, and in this case, there are also corresponding transmit filters TX and receive filters RX among the multiple second filters 20. In the first area A1 and the second area A2, the number of transmit filters TX is the same as the number of receive filters RX, so that one transmit filter TX and one receive filter RX constitute a group, and a group of transmit filters TX and receive filters RX can be set corresponding to each frequency band.

[0036] Optionally, Figure 3 is a schematic diagram of the circuit structure of another surface acoustic wave device provided in an embodiment of the present application, and Figure 4 is a circuit layout of a surface acoustic wave device corresponding to Figure 3. In combination with reference to Figures 3 and 4, the first area A1 includes at least two first filters 10 and at least two first ground networks G1 arranged in a one-to-one correspondence with the at least two first filters 10, and the second area A2 includes at least two second filters 20 and at least two second ground networks G2 arranged in a one-to-one correspondence with the at least two second filters 20; the first filter 10 and the second filter 20 electrically connected to the same first jumper trace B1 are the transmitting filter Tx and the receiving filter RX, respectively.

[0037] Since the first ground network G1 is provided in a one-to-one correspondence with the first filter 10 and is electrically connected to the corresponding first filter 10, and the second ground network G2 is provided in a one-to-one correspondence with the second filter 20 and is electrically connected to the corresponding second filter 20, the first jumper trace B1 is electrically connected to the first ground trace G1, which is equivalent to the first jumper trace B1 being electrically connected to the first filter 10 corresponding to the first ground network G1. Similarly, the first jumper trace B1 is electrically connected to the second ground trace G2, which is equivalent to the first jumper trace B1 being electrically connected to the second filter 20 corresponding to the second ground network G2. When the surface acoustic wave device 00 is a multiplexer, the first filter 10 and the second filter 20 electrically connected to the same first jumper trace B1 can be a transmit filter TX and a receive filter RX, respectively. This can also improve the surface acoustic wave device 00's suppression of noise signals and improve the isolation of the surface acoustic wave device 00. The first filter 10 and the second filter 20 electrically connected to the same first jumper trace B1 can be a transmit filter TX and a receive filter RX of the same frequency band, or can be a transmit filter TX and a receive filter RX of different frequency bands, and this is not limited in this embodiment of the present application. It should be noted that FIG4 only shows, for example, that the surface acoustic wave device 00 includes two first jumper traces B1, and the two first ground networks G1 are electrically connected to the corresponding second ground networks G2 via a first jumper trace B1. It is understandable that when the surface acoustic wave device 00 is a multiplexer, it can also include only one first jumper trace B1. In this case, a set of first ground traces G1 and second ground traces G2 can be provided, electrically connected via the first jumper trace B1, and this is not limited in this embodiment of the present application.

[0038] Optionally, Figure 5 is a schematic diagram of the circuit structure of another surface acoustic wave device provided in an embodiment of the present application, and Figure 6 is a circuit layout of a surface acoustic wave device corresponding to Figure 5. With reference to Figures 5 and 6, the first area A1 includes at least two first filters 10 and at least two first ground networks G1 arranged in a one-to-one correspondence with the at least two first filters 10, and the second area A2 includes at least two second filters 20 and at least two second ground networks G2 arranged in a one-to-one correspondence with the at least two second filters 20; the first filter 10 and the second filter 20 electrically connected to the same first jumper trace B1 are both transmit filters TX.

[0039] When the surface acoustic wave device 00 is a multiplexer, the first filter 10 and the second filter 20 electrically connected to the same first jumper wire B1 can also be transmit filters TX, which can also improve the suppression of noise signals by the surface acoustic wave device 00 and improve the isolation of the surface acoustic wave device 00.

[0040] Optionally, referring to FIG4 , first area A1 includes at least two first filters 10 and at least two first ground traces G1 corresponding to the at least two first filters 10, and second area A2 includes at least two second filters 20 and at least two second ground traces G2 corresponding to the at least two second filters 20. Both the first filter 10 and the second filter 20 electrically connected to the same first jumper trace are receive filters. When the surface acoustic wave device 00 is a multiplexer, the first filter 10 and the second filter 20 electrically connected to the same first jumper trace B1 can also serve as receive filters TX, which can also improve the surface acoustic wave device 00's suppression of noise signals and enhance its isolation.

[0041] Optionally, with reference to FIG2 , the first filter 10 includes at least a first series resonator S1, a second series resonator S2, a third series resonator S3, a fourth series resonator S4, a first parallel resonator P1, a second parallel resonator P2, a third parallel resonator P3, and a fourth parallel resonator P4; both ends of the first series resonator S1, the second series resonator S2, the third series resonator S3, and the fourth series resonator S4 are provided with a first connecting trace C1, and the first series resonator S1, the second series resonator S2, the third series resonator S3, and the fourth series resonator S4 are connected in series between the receiving end and the transmitting end of the first filter 10 through their respective first connecting traces C1; the first end of the first parallel resonator P1 is electrically connected to the receiving end and the transmitting end. The first parallel resonator P1 is connected to the first connecting trace C1 between the first series resonator S1 and the second series resonator S2, the first end of the second parallel resonator P2 is electrically connected to the first connecting trace C1 between the second series resonator S2 and the third series resonator S3, the first end of the third parallel resonator P3 is electrically connected to the first connecting trace C1 between the third series resonator S3 and the fourth series resonator S4, and the first end of the fourth parallel resonator P4 is electrically connected to the first connecting trace C1 on the side of the fourth series resonator S4 away from the third series resonator S3; the second end of the first parallel resonator P1, the second end of the second parallel resonator P2, the second end of the third parallel resonator P3 and the second end of the fourth parallel resonator P4 are all electrically connected to the first ground network G1.

[0042] The first filter 10 may have a ladder structure, wherein a first series resonator S1, a second series resonator S2, a third series resonator S3, and a fourth series resonator S4 are connected in series between the input and output ends of the first filter 10. Furthermore, a first connecting trace C1 between the first series resonator S1 and the second series resonator S2 is electrically connected to the first ground network G1 via a first parallel resonator P1, a first connecting trace C1 between the second series resonator S2 and the third series resonator S3 is electrically connected to the first ground network G1 via a second parallel resonator P2, and a first connecting trace C1 between the third series resonator S3 and the fourth series resonator S4 is electrically connected to the first ground network G1 via a third parallel resonator P3. The first ground network G1 may be electrically connected to a second ground network G2 in the second area A2 via a first jumper trace B1.

[0043] For example, the ground network connected to the parallel resonator located in the middle can be optionally electrically connected to the first jumper trace B1, so that the first jumper trace B1 can cross the first connecting trace C1 located in the middle position. Tests have shown that when the above trace setting is adopted, the isolation effect of the surface acoustic wave device 00 is the best.

[0044] Optionally, continuing to refer to Figure 2, the second filter 20 includes at least: a fifth series resonator S5, a sixth series resonator S6, a seventh series resonator S7, an eighth series resonator S8, a fifth parallel resonator P5, a sixth parallel resonator P6 and a seventh parallel resonator P7; both ends of the fifth series resonator S5, the sixth series resonator S6, the seventh series resonator S7 and the eighth series resonator S8 of the second filter 20 are provided with a second connecting trace C2, and the fifth series resonator S5, the sixth series resonator S6, the seventh series resonator S7 and the eighth series resonator S8 are connected in series to the second parallel resonator P5 through their respective second connecting traces C2. Between the input and output ends of the filter 20; the first end of the fifth parallel resonator P5 is electrically connected to the second connecting trace C2 between the fifth series resonator S5 and the sixth series resonator S6, the first end of the sixth parallel resonator P6 is electrically connected to the second connecting trace C2 between the sixth series resonator S6 and the seventh series resonator S7, and the first end of the seventh parallel resonator P7 is electrically connected to the second connecting trace C2 between the seventh series resonator S7 and the eighth series resonator S8; the second end of the fifth parallel resonator P5, the second end of the sixth parallel resonator P6 and the second end of the seventh parallel resonator P7 are all electrically connected to the second ground network G2.

[0045] The second filter 20 may also have a ladder structure, wherein the fifth series resonator S5, the sixth series resonator S6, the seventh series resonator S7, and the eighth series resonator S8 are connected in series between the input and output ends of the second filter 20. Furthermore, a second connecting trace C2 between the fifth series resonator S5 and the sixth series resonator S6 is electrically connected to the second ground network G2 via a fifth parallel resonator P5, and a second connecting trace C2 between the sixth series resonator S6 and the seventh series resonator S7 is electrically connected to the second ground network G2 via a sixth parallel resonator P6. The second ground network G2 may be electrically connected to a first ground network G1 in the first area A1 via a first jumper trace B1.

[0046] Optionally, continuing to refer to Figure 2, the first jumper trace B1 crosses one of the first connecting traces C1, and the first jumper trace B1 is isolated from the crossed first connecting trace C1 by a jumper bridge; and the first jumper trace B1 crosses one of the second connecting traces C2, and the first jumper trace B1 is isolated from the crossed second connecting trace C2 by a jumper bridge.

[0047] FIG7 is a schematic diagram of a bridge layer structure of a surface acoustic wave device provided in an embodiment of the present application. Referring to FIG2 and FIG7 , a filter circuit layer L2 comprising at least a first filter 10 (not shown in FIG7 ), a second filter 20 (not shown in FIG7 ), a first ground network G1, and a second ground network G2 can be formed on a wafer L1. An insulating layer L3 is then formed on the side of the filter circuit layer L2 facing away from the wafer. The insulating layer L3 is then patterned so that the insulating layer L3 at least covers all first connecting traces C1. A jumper trace layer is then formed on the side of the insulating layer C1 facing away from the wafer. The bridge layer is then patterned to form a first jumper trace B1, so that the first jumper trace B1 can connect the first ground network G1 to the second ground network G2 and can also span a first connecting trace C1 in the first filter and a second connecting trace C2 in the second filter. This further improves the isolation of the surface acoustic wave device 00.

[0048] In other feasible embodiments of the present application, the first jumper wire B1 may be configured to only cross one first connection wire C1 , or only cross one second connection wire C2 , which is not limited in the embodiments of the present application.

[0049] For example, the first ground network G1 connected to the parallel resonator located in the middle of the first filter 10 can be electrically connected to the first jumper trace B1, so that the first jumper trace B1 can cross the first connecting trace C1 located in the middle position. For example, in FIG2 , the first ground network G1 between the second parallel resonator P2 and the third parallel resonator P3 is electrically connected to the first jumper trace B1, and then the first ground network G1 is connected to the first connecting trace C1 between the second series resonator S2 and the third series resonator S3. Similarly, the second ground network G2 connected to the parallel resonator located in the middle of the second filter 20 can be electrically connected to the first jumper trace B1, so that the first jumper trace B1 can cross the second connecting trace C2 located in the middle position. Tests have shown that when the above trace setting is adopted, the isolation effect of the surface acoustic wave device 00 is the best.

[0050] Optionally, with reference to Figures 5 and 6, the second filter 20 includes at least: a ninth series resonator S9, a tenth series resonator S10, an eleventh series resonator S11, a DMS resonator 21, an eighth parallel resonator P8, and a ninth parallel resonator P9; both ends of the ninth series resonator S9, the DMS resonator 21, the tenth series resonator S10, and the eleventh series resonator S11 are provided with a third connecting trace C3; the ninth series resonator S9, the DMS resonator 21, the tenth series resonator S10, and the eleventh series resonator S11 is connected in series between the receiving end and the transmitting end of the second filter 20 through the third connecting trace C3; the first end of the eighth parallel resonator P8 is electrically connected to the third connecting trace C3 between the ninth series resonator S9 and the DMS resonator 21; the first end of the ninth parallel resonator P9 is electrically connected to the third connecting trace C3 between the tenth series resonator S10 and the eleventh series resonator S11; the second end of the DMS resonator 21, the second end of the eighth parallel resonator P8 and the second end of the ninth parallel resonator P9 are all electrically connected to the second ground network G2.

[0051] The second filter 20 may include a filter with a DMS structure. Figures 5 and 6 only exemplarily show a filter with a DMS structure. In other feasible embodiments of the present application, the filter with a DMS structure may also be in other forms, which is not limited in the embodiments of the present application. The ninth series resonator S9, the DMS resonator 21, the tenth series resonator S10 and the eleventh series resonator S11 are connected in series between the receiving end and the transmitting end of the second filter 20. The third connecting line C3 between the ninth series resonator S9 and the DMS resonator 21 can be electrically connected to the second ground network G2 through the eighth parallel resonator P8, and the third connecting line C3 between the tenth series resonator S10 and the eleventh series resonator S11 can be electrically connected to the second ground network G2 through the ninth parallel resonator P9. In addition, the end of the DMS resonator 21 where the third connecting line C3 is not provided can be electrically connected to the second ground network G2.

[0052] Exemplarily, when the second filter 20 is a filter with a DMS structure, it may be a receiving filter.

[0053] In addition, Figures 5 and 6 only exemplify the case where a ladder-structured filter and a DMS-structured filter share a common ground via a jumper trace. Figure 8 is a schematic diagram of the circuit structure of another surface acoustic wave device provided in an embodiment of the present application, and Figure 9 is a circuit layout of a surface acoustic wave device corresponding to Figure 8. With reference to Figures 8 and 9, the first filter 10 includes at least a twelfth series resonator S12, a DMS resonator 11, a thirteenth series resonator S13, a fourteenth series resonator S14, a tenth parallel resonator P10, an eleventh parallel resonator P11, and a twelfth parallel resonator P12. A fourth connecting trace C4 is provided at both ends of the twelfth series resonator S12, the DMS resonator 11, the thirteenth series resonator S13, and the fourteenth series resonator S14. The twelfth series resonator S12, the DMS resonator 11, the thirteenth series resonator S13, and the fourteenth series resonator S14 are connected in series between the receiving end and the transmitting end of the first filter 10 via the fourth connecting trace C4. The first end of the tenth parallel resonator P10 is electrically connected to the fourth connecting trace C4 between the twelfth series resonator S12 and the DMS resonator 11. The first end of the eleventh parallel resonator P11 is electrically connected to the fourth connecting trace C4 between the DMS resonator 11 and the thirteenth series resonator S13. The first end of the twelfth parallel resonator P12 is electrically connected to the fourth connecting trace C4 between the thirteenth series resonator S13 and the fourteenth series resonator S14. That is, two DMS structure filters can be connected to a common ground through the jumper trace. In this case, the two DMS structure filters with a common ground are also receive filters.

[0054] For example, FIG10 is a performance comparison diagram of the surface acoustic wave device shown in FIG2 and the related art, and FIG11 is a performance comparison diagram of the surface acoustic wave device shown in FIG4 and the related art. The solid line Q1 in FIG10 and FIG11 is a signal spectrum diagram when the two filters are not connected to the same ground in the related art, and the dotted line Q2 is a signal spectrum diagram when the two filters are connected to the same ground in the embodiment of the present application. The vertical axis in FIG10 and FIG11 is decibel (unit: dB) and the vertical axis is frequency (unit: GHz). As shown in FIG10 and FIG11, after the common ground connection of the two filters is achieved by adopting the embodiment of the present application, the noise suppression of the surface acoustic wave device is effectively improved, and the isolation of the surface acoustic wave device is improved.

Claims

1. A surface acoustic wave device, comprising: First and second regions; The surface acoustic wave device further comprises: at least one first jumper trace; at least one first filter located in the first region; First ground networks are arranged in one-to-one correspondence with the first filters, and all the first ground networks are located in the first area; a second filter located in the second area and arranged in one-to-one correspondence with the first filter; second grounding networks are arranged one-to-one corresponding to the second filters, and all the second grounding networks are located in the second area; The first filter is electrically connected to the first ground network; the second filter is electrically connected to the second ground network; The first jumper trace crosses the first area and the second area, and one end of the first jumper trace located in the first area is electrically connected to the first ground network, and one end of the first jumper trace located in the second area is electrically connected to the second ground network.

2. The surface acoustic wave device according to claim 1, wherein: The first region includes at least two first filters and at least two first grounding networks arranged in one-to-one correspondence with the at least two first filters, and the second region includes at least two second filters and at least two second grounding networks arranged in one-to-one correspondence with the at least two second filters; The first filter and the second filter electrically connected to the same first jumper wiring are a transmitting filter and a receiving filter respectively.

3. The surface acoustic wave device according to claim 1, wherein: The first area includes at least two first filters and at least two first grounding networks arranged in a one-to-one correspondence with the at least two first filters, and the second area includes at least two second filters and at least two second grounding traces arranged in a one-to-one correspondence with the at least two second filters; The first filter and the second filter electrically connected to the same first jumper wiring are both transmit filters.

4. The surface acoustic wave device according to claim 1, wherein: The first region includes at least two first filters and at least two first grounding networks arranged in one-to-one correspondence with the at least two first filters, and the second region includes at least two second filters and at least two second grounding networks arranged in one-to-one correspondence with the at least two second filters; The first filter and the second filter electrically connected to the same first jumper wiring are both receiving filters.

5. The surface acoustic wave device according to any one of claims 1 to 4, wherein: The first filter includes at least a first series resonator, a second series resonator, a third series resonator, a fourth series resonator, a first parallel resonator, a second parallel resonator, a third parallel resonator and a fourth parallel resonator; Both ends of the first series resonator, the second series resonator, the third series resonator and the fourth series resonator are provided with a first connecting line, and the first series resonator, the second series resonator, the third series resonator and the fourth series resonator are connected in series between the input end and the output end of the first filter through the first connecting line; A first end of the first parallel resonator is electrically connected to a first connection line between the first series resonator and the second series resonator, a first end of the second parallel resonator is electrically connected to a first connection line between the second series resonator and the third series resonator, a first end of the third parallel resonator is electrically connected to a first connection line between the third series resonator and the fourth series resonator, and a first end of the fourth parallel resonator is electrically connected to a first connection line on a side of the fourth series resonator away from the third series resonator; A second end of the first parallel resonator, a second end of the second parallel resonator, a second end of the third parallel resonator, and a second end of the fourth parallel resonator are all electrically connected to the first ground network.

6. The surface acoustic wave device according to claim 5, wherein: The second filter includes at least a fifth series resonator, a sixth series resonator, a seventh series resonator, an eighth series resonator, a fifth parallel resonator, a sixth parallel resonator and a seventh parallel resonator; Both ends of the fifth series resonator, the sixth series resonator, the seventh series resonator and the eighth series resonator of the second filter are provided with second connecting wires, and the fifth series resonator, the sixth series resonator and the seventh series resonator are connected in series between the input end and the output end of the second filter through the second connecting wires; The first end of the fifth parallel resonator is electrically connected to the second connection line between the fifth series resonator and the sixth series resonator, the first end of the sixth parallel resonator is electrically connected to the second connection line between the sixth series resonator and the seventh series resonator, and the first end of the seventh parallel resonator is electrically connected to the second connection line between the seventh series resonator and the eighth series resonator; The second end of the fifth parallel resonator, the second end of the sixth parallel resonator, and the second end of the seventh parallel resonator are all electrically connected to the second ground network.

7. The surface acoustic wave device according to claim 6, wherein: The first jumper line crosses over one of the first connecting lines, and the first jumper line is isolated from the crossed first connecting line by a jumper bridge; And, the first jumper routing crosses over one of the second connecting routings, and the first jumper routing is isolated from the crossed second connecting routing by a jumper bridge.

8. The surface acoustic wave device according to claim 5, wherein: The second filter at least includes: a ninth series resonator, a tenth series resonator, an eleventh series resonator, a DMS resonator, an eighth parallel resonator and a ninth parallel resonator; Both ends of the ninth series resonator, the DMS resonator, the tenth series resonator, and the eleventh series resonator are provided with a third connecting wire; the ninth series resonator, the DMS resonator, the tenth series resonator, and the eleventh series resonator are connected in series between the receiving end and the transmitting end of the second filter through the third connecting wire; The first end of the eighth parallel resonator is electrically connected to the third connection line between the ninth series resonator and the DMS resonator; the first end of the ninth parallel resonator is electrically connected to the third connection line between the tenth series resonator and the eleventh series resonator; The DMS resonator, the second end of the eighth parallel resonator, and the second end of the ninth parallel resonator are all electrically connected to a second ground network.

9. The surface acoustic wave device according to claim 8, wherein: The second filter is a receive filter.

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