Circuit topological structure of multiplexer, radio frequency module and electronic equipment
By using counterclockwise winding antenna matching inductor and optimized parallel arm structure in the circuit topology of the multiplexer, the problem of inductor winding space is solved, and signal suppression and isolation performance are maintained , while reducing the space occupied by the inductor in the substrate.
Patent Information
- Application Number
- CN202411519735.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-02-07
AI Technical Summary
In multiplexer design, how to reduce the space occupied by multiple inductors in the substrate while ensuring signal suppression and isolation performance, especially when the number of substrate layers is limited.
In the circuit topology of the multiplexer, the antenna matching inductor is designed using a counterclockwise winding method, and the parallel arm structure is optimized in the transmission filter to reduce the inductance and the area occupied by the ground inductor.
On the premise of ensuring the out-of-band signal suppression and isolation performance of the multiplexer, the area of the ground inductor in the transmission filter is effectively reduced, thereby reducing the space occupied by multiple inductors in the substrate, and solving the inductor winding space stimulation The problem.
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Figure CN119401980A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of multiplexers, and in particular to a circuit topology structure of a multiplexer, a radio frequency module including the circuit topology structure of the multiplexer, and an electronic device including the radio frequency module. Background Art
[0002] In the field of multiplexer design, in order to achieve efficient out-of-band signal suppression and isolation, it is usually necessary to deploy multiple ground inductors. At the same time, in order to optimize the complexity of the external matching circuit and improve the overall performance, sensitive antenna matching inductors are often integrated into the chip substrate. However, considering the need to simplify substrate design and control costs, especially to avoid cost increases caused by increasing the number of substrate layers, the number of substrate layers of the multiplexer is generally limited to four layers. Therefore, how to reduce the space occupied by multiple inductors in the substrate while ensuring the signal suppression and isolation performance of the multiplexer has become a problem that needs to be solved urgently by technicians in this field. Summary of the invention
[0003] In view of the above problems, the present application provides a circuit topology structure of a multiplexer, a radio frequency module including the circuit topology structure of the multiplexer, and an electronic device including the radio frequency module, so as to achieve the purpose of reducing the space occupied by multiple inductors in the substrate while ensuring the out-of-band signal suppression and isolation performance of the multiplexer. The specific scheme is as follows:
[0004] In a first aspect, the present application provides a circuit topology structure of a multiplexer, the circuit topology structure comprising:
[0005] An antenna matching inductor, one end of which is connected to the antenna terminal of the circuit topology structure, and the other end of which is grounded, and the antenna matching inductor includes at least one component, and a signal path direction from a head end to a tail end of the component is counterclockwise;
[0006] At least one transmit filter, one end of the transmit filter is connected to the antenna terminal of the circuit topology structure, and the other end is electrically connected to the transmit terminal, the transmit filter comprises: a series arm structure and a parallel arm structure connected to the series arm structure, the series arm structure comprises at least one series arm, one of the series arms comprises at least one series resonator, the parallel arm structure comprises at least one parallel arm, one of the parallel arms comprises at least one parallel resonator and a ground inductor connected in series with the parallel resonator.
[0007] In a possible implementation manner, a signal path graph from the head end to the tail end of the component is in the shape of a broken line or an arc.
[0008] In a possible implementation manner, the antenna matching inductor includes at least two components, and the at least two components are connected in series.
[0009] In a possible implementation, the multiplexer includes multiple layers of substrates arranged along a first direction, different components of the at least two components are located on different substrates, and the first direction is perpendicular to a plane where a circuit topology structure of the multiplexer is located.
[0010] In a possible implementation, the circuit topology structure of the multiplexer includes an N-layer substrate, the antenna matching inductor includes M components, M=N-1, and different components of the M components are located on different layers of the substrate.
[0011] In a possible implementation manner, in a direction perpendicular to the plane where the circuit topology structure of the multiplexer is located, an outer edge of a top view of the antenna matching inductor is rectangular.
[0012] In a possible implementation, the line width of the component ranges from 40 micrometers to 100 micrometers.
[0013] In a possible implementation manner, one of the parallel arms includes at least two parallel resonators and a grounding inductor, and the at least two parallel resonators are connected in parallel and are grounded through the same grounding inductor.
[0014] In a possible implementation manner, one of the parallel arms includes at least two parallel resonators and at least two grounding inductors, and one of the parallel resonators is grounded via one grounding inductor.
[0015] In a second aspect, the present application provides a radio frequency module, comprising a circuit topology structure of a multiplexer as described in any one of the above items.
[0016] In a third aspect, the present application provides an electronic device, comprising the above-mentioned radio frequency module.
[0017] In the circuit topology structure, radio frequency module and electronic device of the multiplexer provided in the embodiments of the present application, the antenna matching inductor includes at least one component, and the signal path direction from the head end to the tail end of the component is counterclockwise, that is, the component is wound in a counterclockwise manner to reduce the inductance required for the ground inductor in the transmit filter, that is, to reduce the inductance value of the ground inductor in the transmit filter, so that under the premise that the inductance value of the ground inductor is fixed, the area of the ground inductor in the transmit filter can be effectively reduced, and then under the premise of ensuring the signal suppression and isolation performance of the multiplexer, the space occupied by multiple inductors in the substrate is reduced, thereby solving the problem of cramped inductor winding space in the substrate of the circuit topology structure of the multiplexer. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.
[0019] Figure 1 A schematic diagram of the circuit topology of a multiplexer provided in this application;
[0020] Figure 2 The overall structural diagram of the first component, the second component and the third component when the antenna matching inductor is in a matching state and adjusted to 50 ohms, is when the first component, the second component and the third component are wound counterclockwise;
[0021] Figure 3 The schematic diagram of the structure of the first component when the antenna matching inductor is in a matching state and adjusted to 50 ohms and the first component is wound counterclockwise;
[0022] Figure 4 A schematic diagram of the structure of the second component when the antenna matching inductor is in a matching state and adjusted to 50 ohms and the second component is wound counterclockwise;
[0023] Figure 5 The schematic diagram of the structure of the third component when the antenna matching inductor is in a matching state and adjusted to 50 ohms and the third component is wound counterclockwise;
[0024] Figure 6 The overall structural diagram of the first component, the second component and the third component when the antenna matching inductor is in a matching state and adjusted to 50 ohms, is when the first component, the second component and the third component are wound clockwise;
[0025] Figure 7 The schematic diagram of the structure of the first component when the antenna matching inductor is in a matching state and adjusted to 50 ohms and the first component is wound clockwise;
[0026] Figure 8 A schematic diagram of the structure of the second component when the antenna matching inductor is in a matching state and adjusted to 50 ohms and the second component is wound clockwise;
[0027] Fig. 9 The schematic diagram of the structure of the third component when the antenna matching inductor is in a matching state and adjusted to 50 ohms and the third component is wound clockwise;
[0028] Fig.10Schematic diagram of broadband performance of B66 transmit filter, that is, a schematic diagram of the change curve of loss (or suppression) of B66 transmit filter with frequency, wherein the abscissa is the signal frequency and the ordinate is the loss (or suppression);
[0029] Fig.11 Schematic diagram of narrowband performance of B66 transmit filter, that is, a schematic diagram of the change curve of loss (or suppression) of B66 transmit filter with frequency, wherein the abscissa is the signal frequency and the ordinate is the loss (or suppression);
[0030] Fig.12 Schematic diagram of broadband performance of B25 transmit filter, that is, a schematic diagram of the change curve of loss (or suppression) of B25 transmit filter with frequency, wherein the abscissa is the signal frequency and the ordinate is the loss (or suppression);
[0031] Fig.13 It is a schematic diagram of the narrowband performance of the B25 transmit filter, that is, a schematic diagram of the curve of the change of the loss (or suppression) of the B25 transmit filter with the frequency, wherein the horizontal axis is the signal frequency and the vertical axis is the loss (or suppression). DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0033] It is obvious to those skilled in the art that various modifications and changes can be made in this application without departing from the spirit or scope of this application. Therefore, this application is intended to cover modifications and changes of this application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.
[0034] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0035] As described in the background technology section, how to reduce the space occupied by multiple inductors in a substrate while ensuring the out-of-band signal suppression and isolation performance of the multiplexer has become an urgent problem to be solved by those skilled in the art.
[0036] In view of this, an embodiment of the present application provides a circuit topology structure of a multiplexer, such as Figure 1 As shown, the circuit topology includes:
[0037] An antenna matching inductor Lant, one end of which is connected to the antenna terminal Ant of the circuit topology structure, and the other end of which is grounded, and the antenna matching inductor Lant includes at least one component, and a signal path direction from a head end to a tail end of the component is counterclockwise;
[0038] At least one transmit filter 10, the transmit filter 10 is used to transmit a radio frequency signal, one end of the transmit filter is connected to the antenna terminal Ant of the circuit topology structure, and the other end is electrically connected to the transmit terminal Tx, the transmit filter comprises: a series arm structure and a parallel arm structure connected to the series arm structure, the series arm structure comprises at least one series arm, one of the series arms comprises at least one series resonator (at least one of txls1 to txlsn), the parallel arm structure comprises at least one parallel arm, one of the parallel arms comprises at least one parallel resonator (one of txlp1 to txlpm) and a ground inductor (one of txlL1 to txlLr) connected in series with the parallel resonator.
[0039] It should be noted that in the design of multiplexers, the number of inductors in the chip substrate is usually between 3 and 7. Among them, the antenna matching inductor usually has the largest inductance, and its inductance is relatively fixed, usually above 2nH, and the substrate area occupied by this inductor is also relatively fixed. In contrast, the ground inductor connected to the parallel resonator has a smaller inductance, usually between 0.1nH and 1nH, but the number of such inductors is large, and almost a transmit filter needs to be equipped with one to three such ground inductors.
[0040] Taking the circuit topology of a quadplexer as an example, the positions of the antenna matching inductor and the ground inductor of the parallel resonator are as follows: Figure 1 As shown, Lant is the antenna matching inductor, which is generally a parallel inductor; tx1Lr is the rth ground inductor in the tx1 filter, tx2Lr is the rth ground inductor in the tx2 filter, rx1Lr is the rth ground inductor in the rx1 filter, and rx2Lr is the rth ground inductor in the rx2 filter. Among them, the tx1 filter is the first transmit filter, the tx2 filter is the second transmit filter, rx1 is the first receive filter, and rx2 is the second receive filter. It should be noted that in this circuit topology, the number of ground inductors depends on the out-of-band suppression and isolation requirements.
[0041] In the circuit topology structure of the multiplexer provided in the embodiment of the present application, the antenna matching inductor includes at least one component, and the signal path direction from the head end to the tail end of the component is counterclockwise, that is, the component is wound in a counterclockwise manner to reduce the inductance required for the ground inductor in the transmit filter, that is, reduce the inductance value of the ground inductor in the transmit filter, so that under the premise that the inductance value of the ground inductor is fixed, the area of the ground inductor in the transmit filter can be effectively reduced, and then under the premise of ensuring the out-of-band signal suppression and isolation performance of the multiplexer, the space occupied by multiple inductors in the substrate is reduced, thereby solving the problem of cramped inductor winding space in the substrate of the circuit topology structure of the multiplexer.
[0042] Optionally, in one embodiment of the present application, the signal path graph from the head end to the tail end of the component is in the shape of a zigzag line or an arc, so as to increase the area of the component as much as possible while maintaining the same space occupied by the component in the substrate of the circuit topology structure of the multiplexer. This can reduce the space required for the antenna matching inductor while keeping the inductance of the antenna matching inductor fixed, thereby helping to solve the problem of limited inductor winding space in the substrate of the circuit topology structure of the multiplexer, and avoiding an increase in the number of substrate layers of the circuit topology structure of the multiplexer due to the inductance requirement of the antenna matching inductor, thereby increasing the cost of the circuit topology structure of the multiplexer.
[0043] Based on any of the above embodiments, in one embodiment of the present application, the antenna matching inductor includes at least two components, and the at least two components are connected in series to increase the inductance of the antenna matching inductor, thereby meeting the inductance requirement of the circuit topology of the multiplexer for the antenna matching inductor.
[0044] Optionally, based on the above embodiments, in one embodiment of the present application, the multiplexer includes multiple layers of substrates arranged along a first direction, and different components of the at least two components are located on different layers of substrates, and the first direction is perpendicular to the plane where the circuit topology structure of the multiplexer is located. Under the premise that the inductance value of the antenna matching inductor is fixed, by arranging different components of the at least two components on different substrates, the plane area required to be occupied by the antenna matching inductor is reduced, which further helps to solve the problem of cramped inductor winding space in the substrate of the circuit topology structure of the multiplexer.
[0045] Specifically, in one embodiment of the present application, the circuit topology structure of the multiplexer includes N layers of substrates. Since the metal pattern on the bottom substrate in the N layers of substrates is fixed, the antenna matching inductor cannot be set. Therefore, in an optional embodiment of the present embodiment, the antenna matching inductor includes M components, M=N-1, and different components of the M components are located on different layers of substrates, so as to maximize the use of the number of substrate layers in the circuit topology structure of the multiplexer, reduce the space occupied by the components on a single-layer substrate, further help solve the problem of cramped inductor winding space in the substrate of the circuit topology structure of the multiplexer, and at the same time leave more space in the substrate of the circuit topology structure of the multiplexer for setting grounding metal, so as to improve the out-of-band suppression performance and isolation performance of the circuit topology structure of the multiplexer.
[0046] Specifically, in one embodiment of the present application, Figure 2 As shown, the antenna matching inductor includes a first component 31, a second component 32 and a third component 33, wherein the first component 31, the second component 32 and the third component 33 are respectively located on different substrate layers, and the head end of the first component 31 is electrically connected to the antenna terminal, the tail end of the first component 31 is electrically connected to the head end of the second component 32 through a via hole in the substrate, the tail end of the second component 32 is electrically connected to the head end of the third component 33 through a via hole in the substrate, and the tail end of the third component 33 is grounded.
[0047] Optionally, in one embodiment of the present application, Figure 3 As shown, the first group of parts includes a first sub-part 311, a second sub-part 312, a third sub-part 313 and a fourth sub-part 314 which are connected in series in sequence, wherein the first sub-part 311 and the third sub-part 313 extend along a second direction X, the second sub-part 312 and the fourth sub-part 314 extend along a third direction Y, the second direction X and the third direction Y are parallel to the plane where the circuit topology structure of the multiplexer is located, and the second direction X is perpendicular to the third direction Y;
[0048] like Figure 4 As shown, the second component includes a fifth sub-portion 321, a sixth sub-portion 322, a seventh sub-portion 323, an eighth sub-portion 324 and a ninth sub-portion 325 connected in series in sequence, wherein the fifth sub-portion 321, the seventh sub-portion 323 and the ninth sub-portion 325 extend along the third direction Y, and the sixth sub-portion 322 and the eighth sub-portion 324 extend along the second direction X;
[0049] like Figure 5As shown, the third component includes a tenth sub-portion 331, an eleventh sub-portion 332, a twelfth sub-portion 333, a thirteenth sub-portion 334, a fourteenth sub-portion 335 and a fifteenth sub-portion 336 connected in series in sequence, wherein the tenth sub-portion 331, the twelfth sub-portion 333 and the fourteenth sub-portion 335 extend along the second direction X, and the eleventh sub-portion 332, the thirteenth sub-portion 334 and the fifteenth sub-portion 336 extend along the third direction Y.
[0050] It should be noted that, in the above embodiment, one end of the first sub-part away from the second sub-part is electrically connected to the antenna terminal, one end of the fourth sub-part away from the third sub-part is electrically connected to one end of the fifth sub-part away from the sixth sub-part, one end of the ninth sub-part away from the eighth sub-part is electrically connected to one end of the tenth sub-part away from the eleventh sub-part, and one end of the fifteenth sub-part away from the fourteenth sub-part is grounded.
[0051] Specifically, in one embodiment of the present application, continue as follows Figure 2 As shown, in the direction perpendicular to the plane where the circuit topology structure of the multiplexer is located, the outer edge of the top view of the antenna matching inductor is rectangular, but the present application is not limited to this. In other embodiments of the present application, in the direction perpendicular to the plane where the circuit topology structure of the multiplexer is located, the outer edge of the top view of the antenna matching inductor may also be other polygonal or circular shapes, depending on the spatial shape of the substrate in the circuit topology structure of the multiplexer that accommodates the antenna matching inductor.
[0052] Based on any of the above embodiments, in one embodiment of the present application, the line width of the component ranges from 40 microns to 100 microns. It should be noted that, under the premise that other parameters are fixed, the larger the line width of the component, the larger the inductance value of the component, and conversely, the smaller the line width of the component, the smaller the inductance value of the component.
[0053] It should be noted that, in any of the above embodiments, in the transmit filter, one of the parallel arms may include one parallel resonator or at least two parallel resonators, and the present application does not limit this, depending on the specific circumstances.
[0054] Optionally, in one embodiment of the present application, in the transmitting filter, one of the parallel arms includes at least two parallel resonators and a grounding inductor, and the at least two parallel resonators are connected in parallel and grounded through the same grounding inductor to reduce the inductance required for the grounding inductor and further reduce the occupied area of the grounding inductor, but the present application is not limited to this. In one embodiment of the present application, in the transmitting filter, one of the parallel arms includes at least two parallel resonators and at least two grounding inductors, one parallel resonator is grounded through a grounding inductor, or one parallel resonator in some parallel resonators is grounded through a grounding inductor, and at least two parallel resonators in some parallel resonators are grounded through a grounding inductor, depending on the specific circumstances.
[0055] The circuit topology structure of the multiplexer provided in the embodiment of the present application is described below in conjunction with a specific embodiment.
[0056] Take the multiplexer as B25_66 quadplexer as an example, where the frequency band corresponding to B25TX is 1850 GHz~1910 GHz, and the frequency band corresponding to B66(70)TX is 1695 GHz~1780 GHz. Specifically, the B25_66 quadplexer includes: an antenna matching inductor with an inductance value of Lant=2.2nH, and the transmitting filter corresponding to B66TX includes two grounding inductors, where the inductance value of one grounding inductor tx1L1 is B66T_L1=0.1nH, and the inductance value of the other grounding inductor tx1L2 is B66T_L2=0.62nH; the transmitting filter corresponding to B25TX also includes two grounding inductors, where the inductance value of one grounding inductor tx2L1 is B25T_L1=0.15nH, and the inductance value of the other grounding inductor tx2L2 is B25T_L2=0.56nH. In this embodiment, a total of five inductors, including one antenna matching inductor and four ground inductors, need to be built into the 4-layer substrate.
[0057] For example, the antenna matching inductor includes a first component, a second component and a third component, which are respectively located in the other three layers of the substrate in the bottom layer of the four-layer substrate. Figure 6-Figure 9 As shown, Figure 6-Figure 9 FIG. 4 shows a schematic diagram of the structure of the antenna matching inductor when it is in a matching state, such as when it is adjusted to 50 ohms, and the first component, the second component and the third component are wound clockwise; FIG. Figure 2-Figure 5 As shown, Figure 2-Figure 5 It shows a schematic structural diagram of the antenna matching inductor being in a matching state and adjusted to 50 ohms, and the first component, the second component and the third component being wound counterclockwise.
[0058] Experiments show that when the winding directions of the first component, the second component and the third component are changed from clockwise to counterclockwise, and the out-of-band suppression and isolation performance of the circuit topology of the multiplexer are adjusted to the optimal state, the inductance value of B66T_L2 (tx1L2) decreases from 0.62nH to 0.3nH, a decrease of more than 50%; the inductance value of B25T_L2 (tx2L2) decreases from 0.56nH to 0.4nH, a decrease of more than 25%. That is, when the out-of-band suppression and isolation performance of the circuit topology of the multiplexer are adjusted to the optimal state, when the winding directions of the first component, the second component and the third component are changed from clockwise to counterclockwise, the inductance value of at least part of the ground inductor can be reduced when the occupied area of the ground inductor is the same, thereby reducing the occupied area of the ground inductor when the inductance value of the ground inductor is fixed, thereby reducing the space occupied by multiple inductors in the substrate, and solving the problem of cramped inductor winding space in the substrate of the circuit topology of the multiplexer.
[0059] like Fig.10 and Fig.11 As shown, Fig.10 Schematic diagram of broadband performance of B66 transmit filter, that is, a schematic diagram of the change curve of loss (or suppression) of B66 transmit filter with frequency, wherein the abscissa is frequency and the ordinate is loss (or suppression); Fig.11 Schematic diagram of narrowband performance of B66 transmit filter, that is, a curve diagram of loss (or suppression) of B66 transmit filter changing with frequency, wherein the horizontal axis is frequency and the vertical axis is loss (or suppression). Specifically, Fig.11 for Fig.10 A partial enlarged view of Fig.10 and Fig.11 Curve a in the middle represents the change curve of the signal loss (or suppression) of the B66 transmitting filter with the signal frequency when the components of the antenna matching inductor are wound clockwise, and curve b represents the change curve of the signal loss (or suppression) of the B66 transmitting filter with the signal frequency when the components of the antenna matching inductor are wound counterclockwise.
[0060] from Fig.10 and Fig.11 It can be seen that compared with the clockwise winding method of the components of the antenna matching inductor, the counterclockwise winding method of the components of the antenna matching inductor not only does not deteriorate the out-of-band (i.e., out-of-passband, such as 0.5GHz to 1.5GHz, 2.0 GHz to 6.0 GHz) suppression and isolation performance of the B66 transmit filter, but also slightly improves, and the passband performance remains unchanged. Generally speaking, the better the out-of-band suppression performance of the transmit filter, the better the isolation performance of the transmit filter.
[0061] like Fig.12 and Fig.13 As shown, Fig.12 Schematic diagram of broadband performance of B25 transmit filter, that is, a schematic diagram of the change curve of loss (or suppression) of B25 transmit filter with frequency, wherein the abscissa is frequency and the ordinate is loss (or suppression); Fig.13 Schematic diagram of narrowband performance of B25 transmit filter, that is, a curve diagram of loss (or suppression) of B25 transmit filter changing with frequency, wherein the horizontal axis is frequency and the vertical axis is loss (or suppression). Specifically, Fig.13 for Fig.12 A partial enlarged view of Fig.12 and Fig.13 Curve c represents the change curve of the loss (or suppression) of the B25 transmit filter with frequency when the components of the antenna matching inductor are wound clockwise, and curve d represents the change curve of the loss (or suppression) of the B25 transmit filter with frequency when the components of the antenna matching inductor are wound counterclockwise.
[0062] from Fig.12 and Fig.13 It can be seen that compared with the clockwise winding method of the various components of the antenna matching inductor, the counterclockwise winding method of the various components of the antenna matching inductor, the out-of-band suppression and isolation performance of the B25 transmit filter not only did not deteriorate, but was slightly improved, and the passband performance remained unchanged.
[0063] From the above, it can be seen that in the circuit topology structure of the multiplexer provided in the embodiment of the present application, compared with the clockwise winding method of the antenna matching inductor, the counterclockwise winding method of the antenna matching inductor can effectively reduce the area of the grounding inductor in the transmit filter while ensuring the out-of-band suppression and isolation performance, thereby reducing the space occupied by multiple inductors in the substrate while ensuring the signal suppression and isolation performance of the multiplexer, thereby solving the problem of cramped inductor winding space in the substrate of the circuit topology structure of the multiplexer.
[0064] Based on any of the above embodiments, in one embodiment of the present application, Figure 1As shown, the circuit topology structure of the multiplexer also includes at least one receiving filter 20 for receiving radio frequency signals. Specifically, one end of the receiving filter 20 is connected to the antenna terminal Ant of the circuit topology structure, and the other end is electrically connected to the receiving terminal Tx. The receiving filter includes: a series arm structure and a parallel arm structure connected to the series arm structure, the series arm structure includes at least one series arm, one of the series arms includes at least one series resonator (at least one of rxls1 to rxlsn), the parallel arm structure includes at least one parallel arm, one of the parallel arms includes at least one parallel resonator (one of rxlp1 to rxlpm) and a grounding inductor (one of rxlL1 to rxlLr) connected in series with the parallel resonator.
[0065] Optionally, based on the above embodiments, in one embodiment of the present application, in the receiving filter, one of the parallel arms may include one parallel resonator or at least two parallel resonators. The present application does not limit this and it depends on the specific circumstances.
[0066] Optionally, in one embodiment of the present application, in the receiving filter, one of the parallel arms includes at least two parallel resonators and a grounding inductor, and the at least two parallel resonators are connected in parallel and grounded through the same grounding inductor to reduce the inductance required for the grounding inductor and further reduce the area occupied by the grounding inductor, but the present application is not limited to this. In one embodiment of the present application, in the receiving filter, one of the parallel arms includes at least two parallel resonators and at least two grounding inductors, one parallel resonator is grounded through a grounding inductor, or one parallel resonator in some parallel resonators is grounded through a grounding inductor, and at least two parallel resonators in some parallel resonators are grounded through a grounding inductor, depending on the specific circumstances.
[0067] In addition, the embodiments of the present application further provide a radio frequency module and an electronic device, wherein the radio frequency module includes the circuit topology structure of the multiplexer provided in any of the above embodiments, and the electronic device includes the radio frequency module. Since the relevant description of the circuit topology structure of the multiplexer has been described in detail in the above embodiments, it will not be repeated here.
[0068] In summary, in the circuit topology structure, radio frequency module and electronic device of the multiplexer provided in the embodiments of the present application, the antenna matching inductor includes at least one component, and the signal path direction from the head end to the tail end of the component is counterclockwise, that is, the component is wound in a counterclockwise manner to reduce the inductance required for the grounding inductor in the transmit filter, that is, reduce the inductance value of the grounding inductor in the transmit filter, so that under the premise that the inductance value of the grounding inductor is fixed, the area of the grounding inductor in the transmit filter can be effectively reduced, and then under the premise of ensuring the signal suppression and isolation performance of the multiplexer, the space occupied by multiple inductors in the substrate is reduced, thereby solving the problem of cramped inductor winding space in the substrate of the circuit topology structure of the multiplexer.
[0069] In this specification, each embodiment is described in a progressive, parallel, or progressive and parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can 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 parts can be referred to the method part.
[0070] It should be noted that in the description of the present application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. The same reference numerals throughout the embodiments of the specification identify the same structure. In addition, for the sake of understanding and ease of description, the drawings may exaggerate the thickness of some layers, films, panels, regions, etc. It is also understood that when an element such as a layer, film, region, or substrate is referred to as "on" another element, the element may be directly on the other element or there may be an intermediate element. In addition, "on" refers to positioning an element on or below another element, but does not essentially refer to positioning on the upper side of another element according to the direction of gravity.
[0071] The terms "upper", "lower", "top", "bottom", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.
[0072] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.
[0073] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A circuit topology structure of a multiplexer, characterized in that: The circuit topology includes: An antenna matching inductor, one end of which is connected to the antenna terminal of the circuit topology structure, and the other end of which is grounded, and the antenna matching inductor includes at least one component, and a signal path direction from a head end to a tail end of the component is counterclockwise; At least one transmit filter, one end of the transmit filter is connected to the antenna terminal of the circuit topology structure, and the other end is electrically connected to the transmit terminal, the transmit filter comprises: a series arm structure and a parallel arm structure connected to the series arm structure, the series arm structure comprises at least one series arm, one of the series arms comprises at least one series resonator, the parallel arm structure comprises at least one parallel arm, one of the parallel arms comprises at least one parallel resonator and a ground inductor connected in series with the parallel resonator.
2. The circuit topology structure of the multiplexer according to claim 1, characterized in that: The signal path graph from the head end to the tail end of the component is in the shape of a broken line or an arc.
3. The circuit topology structure of the multiplexer according to claim 1, characterized in that: The antenna matching inductor includes at least two components, and the at least two components are connected in series.
4. The circuit topology structure of the multiplexer according to claim 3, characterized in that: The multiplexer includes multiple layers of substrates arranged along a first direction, different components of the at least two components are located on different substrates, and the first direction is perpendicular to a plane where a circuit topology structure of the multiplexer is located.
5. The circuit topology structure of the multiplexer according to claim 4, characterized in that: The circuit topology structure of the multiplexer includes an N-layer substrate, the antenna matching inductor includes M components, M=N-1, and different components of the M components are located on different layers of the substrate.
6. The circuit topology structure of the multiplexer according to claim 1, characterized in that: In a direction perpendicular to the plane where the circuit topology structure of the multiplexer is located, the outer edge of the top view of the antenna matching inductor is rectangular.
7. The circuit topology structure of the multiplexer according to claim 1, characterized in that: The line width of the component has a value range of 40 microns to 100 microns.
8. The circuit topology structure of the multiplexer according to claim 1, characterized in that: One of the parallel arms includes at least two parallel resonators and a grounding inductor. The at least two parallel resonators are connected in parallel and are grounded through the same grounding inductor.
9. The circuit topology structure of the multiplexer according to claim 1, characterized in that: One of the parallel arms includes at least two parallel resonators and at least two grounding inductors, and one of the parallel resonators is grounded via one grounding inductor.
10. A radio frequency module, characterized in that: A circuit topology structure comprising the multiplexer described in any one of claims 1-9.
11. An electronic device, characterized in that: Including the radio frequency module described in claim 10.