CN116979920A - Filter with large bandwidth and high suppression at near end, integrated module and electronic equipment - Google Patents
Filter with large bandwidth and high suppression at near end, integrated module and electronic equipment Download PDFInfo
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- CN116979920A CN116979920A CN202310937858.XA CN202310937858A CN116979920A CN 116979920 A CN116979920 A CN 116979920A CN 202310937858 A CN202310937858 A CN 202310937858A CN 116979920 A CN116979920 A CN 116979920A
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- filter
- capacitor
- acoustic resonator
- inductor
- large bandwidth
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- 230000001629 suppression Effects 0.000 title abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 66
- 230000003993 interaction Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 238000004088 simulation Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010897 surface acoustic wave method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1716—Comprising foot-point elements
- H03H7/1725—Element to ground being common to different shunt paths, i.e. Y-structure
Abstract
The application provides a filter with large bandwidth and high suppression at a near end, an integrated module and electronic equipment, wherein the filter with large bandwidth and high suppression at the near end comprises the following components: at least one acoustic resonator and an LC filter assembly, the LC filter assembly comprising a capacitance and an inductance; wherein the acoustic resonator, the capacitance and the inductance are connected in series and/or in parallel, the filter being configured to be able to form at least one transmission zero. The capacitance and the inductance in the LC filter component are used for matching the acoustic resonator to improve the bandwidth of the filter, and at least one transmission zero point can be formed based on the interaction of the capacitance, the inductance and the acoustic resonator to improve the suppression degree, so that the filter with large bandwidth and high near-end suppression is realized.
Description
Technical Field
The present application relates to the field of semiconductor devices, and more particularly, to a filter, an integrated module, and an electronic device with a large bandwidth and high near-end rejection.
Background
Conventional radio frequency communication filters include LC filters, SAW (all english: surface Acoustic Wave) surface acoustic wave filters, BAW (all english: bulk Acoustic Wave) bulk acoustic wave filters, FBAR (all english: filmBulkAcoustic Resonator) bulk acoustic wave filters, and the like.
The LC filter may include an LC filter of LTCC (Low Temperature Co-natural Ceramic) and an LC filter of IPD (Integrated Passive Devices, passive integrated device), and the LC filter represented by LTCC may be used to make a wideband filter, but limited by the Q value of the device, so that the near-end suppression performance of the LC filter is hardly improved; although the surface acoustic wave filter and the bulk acoustic wave filter can be manufactured into a narrow-band filter with high suppression at the near end, the bandwidth is difficult to be improved.
Based on the current 5G communication and the subsequent 6G communication, the frequency band is very wide and the frequency band is very close, so how to provide a filter with large bandwidth and high suppression at the near end is a technical problem to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the present application provides a filter, an integrated module and an electronic device with large bandwidth and high suppression at the near end, which have the following technical schemes:
a high bandwidth and near end high rejection filter, the filter comprising: at least one acoustic resonator and an LC filter assembly, the LC filter assembly comprising a capacitance and an inductance;
wherein the acoustic resonator, the capacitance and the inductance are connected in series and/or in parallel, the filter being configured to be able to form at least one transmission zero.
Preferably, in the above-mentioned filter with large bandwidth and high suppression at the near end, the at least one acoustic resonator includes: a first acoustic resonator, the LC filter assembly comprising: the first inductor, the second inductor and the pi-shaped capacitor network;
the first end of the first inductor is connected with the first end of the pi-shaped capacitor network, and the connection node is used as the first end of the filter;
a second end of the first inductor is connected with a first end of the first acoustic resonator;
the second end of the first acoustic resonator is connected with the second end of the pi-shaped capacitor network, and a connection node is used as the second end of the filter;
and the third end of the pi-shaped capacitor network is grounded through the second inductor.
Preferably, in the above-mentioned filter with large bandwidth and high suppression at the near end, the n-shaped capacitor network includes: a first capacitor, a second capacitor, and a third capacitor;
the first end of the first capacitor is connected with the first end of the second capacitor, and the connection node is used as the first end of the n-shaped capacitor network;
the second end of the second capacitor is connected with the first end of the third capacitor, and the connection node is used as the second end of the n-shaped capacitor network;
the second end of the first capacitor is connected with the second end of the third capacitor, and the connection node is used as the third end of the pi-shaped capacitor network.
Preferably, in the above-mentioned filter with large bandwidth and high suppression at the near end, the at least one acoustic resonator further includes: a second acoustic resonator, the LC filter assembly further comprising: a third inductor, a fourth inductor and a fourth capacitor;
wherein the first end of the second acoustic resonator is the first end of the filter;
a second end of the second acoustic resonator is connected with a first end of the third inductor;
the second end of the third inductor is connected with the first end of the fourth capacitor, and the connecting node is connected with the first end of the first inductor;
the second end of the fourth capacitor is connected with the first end of the fourth inductor;
the second end of the fourth inductor is grounded.
The application also provides an integrated module comprising the high bandwidth and near-end high rejection filter of any one of the above.
The application also provides electronic equipment, which comprises the filter with large bandwidth and high suppression at the near end;
or alternatively, the first and second heat exchangers may be,
the electronic equipment comprises the integrated module.
Compared with the prior art, the application has the following beneficial effects:
the application provides a filter with large bandwidth and high suppression at a near end, which comprises the following components: at least one acoustic resonator and an LC filter assembly, the LC filter assembly comprising a capacitance and an inductance; wherein the acoustic resonator, the capacitance and the inductance are connected in series and/or in parallel, the filter being configured to be able to form at least one transmission zero. The capacitance and the inductance in the LC filter component are used for matching the acoustic resonator to improve the bandwidth of the filter, and at least one transmission zero point can be formed based on the interaction of the capacitance, the inductance and the acoustic resonator to improve the suppression degree, so that the filter with large bandwidth and high near-end suppression is realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a filter with large bandwidth and high near-end rejection according to an embodiment of the present application;
fig. 2 is a schematic diagram of a simulation result of a first acoustic resonator in a circuit structure of a filter shown in fig. 1 according to an embodiment of the present application;
fig. 3 is a schematic diagram of a simulation result after a first acoustic resonator is shorted in the circuit structure of the filter shown in fig. 1 according to an embodiment of the present application;
fig. 4 is a schematic diagram of a simulation result based on the filter circuit structure shown in fig. 1 according to an embodiment of the present application;
FIG. 5 is a schematic circuit diagram of another high bandwidth and near-end high rejection filter according to an embodiment of the present application;
fig. 6 is a schematic diagram of a simulation result based on the filter circuit structure shown in fig. 5 according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.
The filter with large bandwidth and high near-end rejection provided by the embodiment of the application comprises: at least one acoustic resonator and an LC filter assembly comprising a capacitance and an inductance.
Wherein the acoustic resonator, the capacitance and the inductance are connected in series and/or in parallel, the filter being configured to be able to form at least one transmission zero.
Specifically, in the embodiment of the application, the acoustic resonator is used for realizing near-end high suppression, the capacitor and the inductor in the LC filter assembly are used for matching the acoustic resonator so as to improve the bandwidth of the filter, and at least one transmission zero point can be formed based on the interaction of the capacitor, the inductor and the acoustic resonator so as to improve the suppression degree, thereby realizing the filter with large bandwidth and near-end high suppression.
Optionally, in another embodiment of the present application, referring to fig. 1, fig. 1 is a schematic circuit diagram of a large bandwidth and near-end high suppression filter according to an embodiment of the present application, where the at least one acoustic resonator includes: a first acoustic resonator S1, the LC filter assembly comprising: the first inductor L1, the second inductor L2 and the pi-shaped capacitor network.
The first end of the first inductor L1 is connected to the first end of the n-shaped capacitor network, and the connection node is used as the first end P1 of the filter.
The second end of the first inductance L1 is connected to the first end of the first acoustic resonator S1.
A second end of the first acoustic resonator S1 is connected to a second end of the n-shaped capacitive network, and a connection node is used as a second end P2 of the filter.
And the third end of the pi-shaped capacitor network is grounded through the second inductor L2.
As shown in fig. 1, the pi-shaped capacitor network includes: a first capacitor C1, a second capacitor C2 and a third capacitor C3.
The first end of the first capacitor C1 is connected to the first end of the second capacitor C2, and the connection node is used as the first end of the n-shaped capacitor network.
The second end of the second capacitor C2 is connected to the first end of the third capacitor C3, and the connection node is used as the second end of the n-shaped capacitor network.
The second end of the first capacitor C1 is connected to the second end of the third capacitor C3, and the connection node is used as the third end of the n-shaped capacitor network.
Specifically, in the embodiment of the application, the first inductor L1 is used as a series inductor to be connected with the first acoustic resonator S1 in series, and then is connected in parallel with a pi-shaped capacitor network formed by the first capacitor C1, the second capacitor C2 and the third capacitor C3, and the lower part of the pi-shaped capacitor network is grounded through the second inductor L2, so that a novel filter with large bandwidth and high suppression at the near end is realized.
Referring to fig. 2, fig. 2 is a schematic diagram of a simulation result based on a first acoustic resonator in the filter circuit structure shown in fig. 1 according to an embodiment of the present application, referring to fig. 3, fig. 3 is a schematic diagram of a simulation result based on a short circuit of a first acoustic resonator in the filter circuit structure shown in fig. 1 according to an embodiment of the present application, referring to fig. 4, fig. 4 is a schematic diagram of a simulation result based on the filter circuit structure shown in fig. 1 according to an embodiment of the present application, and based on the simulation results shown in fig. 2-4, it can be seen that the filter circuit structure based on fig. 1 according to an embodiment of the present application can simultaneously satisfy the characteristics of high bandwidth (bandwidth range is 3GHz-5 GHz) and near-end high suppression (greater than 5.15GHz, suppression 20).
Optionally, in another embodiment of the present application, referring to fig. 5, fig. 5 is a schematic circuit diagram of another large bandwidth and near-end high suppression filter according to an embodiment of the present application, where the at least one acoustic resonator further includes: a second acoustic resonator S2, the LC filter assembly further comprising: a third inductance L3, a fourth inductance L4 and a fourth capacitance C4.
Wherein the first end of the second acoustic resonator S2 serves as the first end P1 of the filter.
A second end of the second acoustic resonator S2 is connected to a first end of the third inductor L3.
The second end of the third inductor L3 is connected to the first end of the fourth capacitor C4, and the connection node is connected to the first end of the first inductor L1.
The second end of the fourth capacitor C4 is connected to the first end of the fourth inductor L4.
The second end of the fourth inductor L4 is grounded.
Specifically, in the embodiment of the present application, a second acoustic resonator S2, a third inductor L3, a fourth inductor L4, and a fourth capacitor C4 are added on the basis of the filter circuit structure shown in fig. 1, so as to form another novel filter with large bandwidth and high suppression at the near end.
Referring to fig. 6, fig. 6 is a schematic diagram of a simulation result based on the filter circuit structure shown in fig. 5, which is provided in the embodiment of the present application, it can be obviously seen that the performance of the filter with large bandwidth and high suppression at the near end is further improved.
Based on the above embodiment of the present application, in another embodiment of the present application, there is further provided an integrated module, where the integrated module includes the filter with large bandwidth and high near-end rejection described in the above embodiment.
Based on the above embodiment of the present application, in another embodiment of the present application, there is further provided an electronic device, which includes the filter with large bandwidth and high near-end rejection described in the above embodiment.
Or alternatively, the first and second heat exchangers may be,
the electronic equipment comprises the integrated module set in the embodiment.
The large bandwidth and high suppression near-end filter, the integrated module and the electronic device provided by the application are described in detail, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above examples is only used for helping to understand the method and the core idea of the application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include, or is intended to include, elements inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A high bandwidth and near end high rejection filter, the filter comprising: at least one acoustic resonator and an LC filter assembly, the LC filter assembly comprising a capacitance and an inductance;
wherein the acoustic resonator, the capacitance and the inductance are connected in series and/or in parallel, the filter being configured to be able to form at least one transmission zero.
2. The filter of claim 1, wherein the at least one acoustic resonator comprises: a first acoustic resonator, the LC filter assembly comprising: the first inductor, the second inductor and the pi-shaped capacitor network;
the first end of the first inductor is connected with the first end of the pi-shaped capacitor network, and the connection node is used as the first end of the filter;
a second end of the first inductor is connected with a first end of the first acoustic resonator;
the second end of the first acoustic resonator is connected with the second end of the pi-shaped capacitor network, and a connection node is used as the second end of the filter;
and the third end of the pi-shaped capacitor network is grounded through the second inductor.
3. The filter of claim 2, wherein the pi-shaped capacitor network comprises: a first capacitor, a second capacitor, and a third capacitor;
the first end of the first capacitor is connected with the first end of the second capacitor, and the connection node is used as the first end of the n-shaped capacitor network;
the second end of the second capacitor is connected with the first end of the third capacitor, and the connection node is used as the second end of the n-shaped capacitor network;
the second end of the first capacitor is connected with the second end of the third capacitor, and the connection node is used as the third end of the pi-shaped capacitor network.
4. A filter according to any of claims 2-3, wherein the at least one acoustic resonator further comprises: a second acoustic resonator, the LC filter assembly further comprising: a third inductor, a fourth inductor and a fourth capacitor;
wherein the first end of the second acoustic resonator is the first end of the filter;
a second end of the second acoustic resonator is connected with a first end of the third inductor;
the second end of the third inductor is connected with the first end of the fourth capacitor, and the connecting node is connected with the first end of the first inductor;
the second end of the fourth capacitor is connected with the first end of the fourth inductor;
the second end of the fourth inductor is grounded.
5. An integrated module comprising the filter of any one of claims 1-4.
6. An electronic device, characterized in that it comprises the filter of any one of claims 1-4;
or alternatively, the first and second heat exchangers may be,
the electronic device comprising the integrated module of claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310937858.XA CN116979920A (en) | 2023-07-26 | 2023-07-26 | Filter with large bandwidth and high suppression at near end, integrated module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310937858.XA CN116979920A (en) | 2023-07-26 | 2023-07-26 | Filter with large bandwidth and high suppression at near end, integrated module and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116979920A true CN116979920A (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310937858.XA Pending CN116979920A (en) | 2023-07-26 | 2023-07-26 | Filter with large bandwidth and high suppression at near end, integrated module and electronic equipment |
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| Country | Link |
|---|---|
| CN (1) | CN116979920A (en) |
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- 2023-07-26 CN CN202310937858.XA patent/CN116979920A/en active Pending
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