Radio frequency front-end module and electronic equipment

Abstract

The invention relates to a radio frequency front-end module and electronic equipment, the radio frequency front-end module comprises a substrate, a first filter, an antenna terminal and a chip, the chip is arranged on the substrate, the first filter comprises a first terminal, a first resonator group and a first inductor, the first resonator group is electrically connected between the antenna terminal and the first terminal, and the first inductor is electrically connected between the antenna terminal and the first terminal. The antenna terminal is configured to be electrically connected with an external antenna, the first terminal is configured to be electrically connected with an external circuit, a first end of the first inductor is electrically connected with the first resonator group, and a second end of the first inductor is grounded; the first resonator group is arranged on the chip, the antenna terminal, the first terminal and the first inductor are arranged on the substrate at intervals, and the first terminal is closer to the antenna terminal than the first inductor. According to the filter, the first terminal is arranged between the first inductor and the antenna terminal, so that cross wiring in the first filter is reduced, and the isolation degree of the filter is improved.

Description

Technical Field

[0001] The present application relates to the field of radio frequency, and in particular to a radio frequency front-end module and electronic equipment. Background Art

[0002] With the continuous development of mobile communication technology, RF front-end modules play an increasingly important role in communication systems. In the RF field, RF front-end modules usually use multiple filters to filter RF signals of different frequency bands, and select one of the RF signals to output to the antenna through the antenna switch to cooperate with the RF front-end module to process and transmit various signals.

[0003] However, in the prior art, the arrangement of each filter and the routing between each filter and the antenna may cause deterioration of out-of-band suppression and isolation. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a solution to improve isolation, which specifically includes the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a radio frequency front-end module, including a substrate, a first filter, an antenna terminal and a chip, wherein the chip is disposed on the substrate, the first filter includes a first terminal, a first resonator group and a first inductor, the first resonator group is electrically connected between the antenna terminal and the first terminal, the antenna terminal is configured to be electrically connected to an external antenna, the first terminal is configured to be electrically connected to an external circuit, a first end of the first inductor is electrically connected to the first resonator group, and a second end of the first inductor is grounded;

[0006] The first resonator group is arranged on the chip, the antenna terminal and the first terminal are arranged on the substrate with a spacing, and the first inductor is arranged on the substrate and is arranged with a spacing from the antenna terminal and the first terminal;

[0007] The first terminal is closer to the antenna terminal than the first inductor.

[0008] The RF front-end module of the present application is provided with a first resonator group electrically connected between the antenna terminal and the first terminal, so that the first resonator group can process the external signal received through the antenna terminal and output the processed signal through the first terminal, or so that the first resonator group can process the external signal input through the first terminal and output the processed external signal through the antenna terminal, thereby realizing the signal processing function of the first filter.

[0009] Since the first resonator group is electrically connected to the first end of the first inductor, the antenna terminal and the first terminal respectively, the RF front-end module of the present application also avoids the connection between the first inductor and the first resonator group from crossing the connection between the first resonator group and the first terminal by arranging the first terminal between the first inductor and the antenna terminal, thereby reducing the crossed wiring in the first filter and improving the isolation of the RF front-end module of the present application.

[0010] In one embodiment, the first resonator group is arranged on the surface of the chip facing the substrate, and the first resonator group includes a first connecting terminal and a second connecting terminal, the first connecting terminal is connected to the first terminal arranged on the substrate, the second connecting terminal is connected to the first inductor, and the projections of the first connecting terminal and the first terminal in the longitudinal direction at least partially overlap.

[0011] In one embodiment, the substrate includes a first area, the center of the first area coincides with the geometric center of the substrate, the ratio of the diameter of the first area to the width of the substrate is 0.7, the antenna terminal is located in the first area, the projections of the first connecting terminal and the second connecting terminal on the substrate are both located outside the first area, and the first inductor and the first terminal are located outside the first area.

[0012] In one embodiment, the RF front-end module also includes a second filter separated from the first filter, the second filter includes a second resonator group and a second terminal, the second resonator group is arranged on the chip, the second terminal is located on the substrate, the second resonator group is electrically connected between the antenna terminal and the second terminal, and the second terminal is used to be electrically connected to an external circuit; along the width direction of the substrate, the projection of the first resonator group on the substrate and the projection of the second resonator group on the substrate are arranged on both sides of the center line of the substrate, wherein the center line of the substrate passes through the center point of the substrate.

[0013] In one embodiment, the second resonator group is arranged on the surface of the chip facing the substrate, and the second resonator group includes a third connection terminal, which is connected to the second terminal arranged on the substrate, and the projections of the third connection terminal and the second terminal in the longitudinal direction at least partially overlap.

[0014] In one embodiment, the minimum spacing between the first connection terminal and the center line along the width direction of the substrate is less than or equal to 0.2 times the width of the substrate.

[0015] In one embodiment, the number of first filters is two, and the antenna terminal is located between two first connecting terminals along the length direction of the substrate; and / or, the number of second filters is two, and the antenna terminal is located between two third connecting terminals along the length direction of the substrate.

[0016] In one embodiment, the difference in the distance between any two first connection terminals and / or the third connection terminals and the antenna terminal is less than or equal to 0.4 times the length of the substrate.

[0017] In one embodiment, the number of first filters is greater than or equal to three, the number of second filters is greater than or equal to three, the first connecting terminal and the second connecting terminal of each first resonator group, and the third connecting terminal of each second resonator are all surrounded by the periphery of the antenna terminal, and each first terminal and each second terminal are surrounded by the periphery of the antenna terminal.

[0018] In one embodiment, the substrate includes a first sub-board, a second sub-board and a third sub-board stacked in sequence, the antenna terminal is located on a surface of the first sub-board facing away from the second sub-board along the thickness direction of the substrate, the first terminal passes through the substrate, and the first inductor is located on a surface of the second sub-board facing the first sub-board.

[0019] In one embodiment, there are multiple first filters, each of which includes a first inductor, and the first inductors in different first filters are located in different areas of the same sub-board, or the first inductors in different first filters are located on different sub-boards.

[0020] In one embodiment, the first filter further includes a third terminal, the third terminal is used to electrically connect the first inductor and the first resonator group, and the antenna terminal is spaced apart from the third terminal along the plane direction of the substrate.

[0021] In one embodiment, the third terminal passes through the first sub-board; the substrate further includes an isolation medium, which is located on a surface of the first sub-board facing away from the second sub-board and between the antenna terminal and the third terminal along the plane direction of the substrate.

[0022] In one embodiment, the isolation medium surrounds the antenna terminal, and the isolation medium is located between the antenna terminal and the first terminal along a plane direction of the substrate.

[0023] In one embodiment, the RF front-end module also includes a second inductor, which is arranged on the substrate, one end of the second inductor is electrically connected between the antenna terminal and the first resonator group, the other end of the second inductor is grounded, and the second inductor and the first inductor are spaced apart from each other.

[0024] In a second aspect, an embodiment of the present application provides a radio frequency front-end module, including a substrate, an antenna terminal, a chip and four filters, wherein the chip and the antenna terminal are both arranged on the substrate, each filter includes a resonator group, each resonator group is arranged on the chip and is electrically connected to the antenna terminal respectively; wherein,

[0025] The connection terminals connecting each resonator group to the substrate are spaced around the periphery of the antenna terminal;

[0026] At least two of the four filters also include a first inductor and a first terminal, the first terminal is configured to be electrically connected to an external circuit, the first terminal and the first inductor are both arranged on a substrate, the first terminal is electrically connected to a first connecting terminal of a corresponding filter resonator group, the first inductor is electrically connected to a second connecting terminal of a corresponding filter resonator group, and the distance between the first inductor and the antenna terminal is greater than the distance between the corresponding first connecting terminal and the antenna terminal.

[0027] The RF front-end module of the present application surrounds the connection terminals of the four resonator groups around the periphery of the antenna terminal to ensure the distance between the antenna terminal and each connection terminal, thereby ensuring the isolation between the antenna terminal and each resonator group.

[0028] The RF front-end module of the present application also adjusts the spacing between the first inductor and the corresponding first connection terminal and the antenna terminal so that there is a relatively large spacing between the first inductor and the antenna terminal, thereby reducing the influence of the inductance value of the first inductor on the signal transmitted by the antenna terminal, which is more conducive to the out-of-band suppression of the RF front-end module of the present application, thereby improving the working performance of the RF front-end module of the present application.

[0029] In one embodiment, the four filters include two first filters and two second filters, the resonator group includes a first resonator group and a second resonator group, each first filter includes a first resonator group and a first inductor, each first resonator group includes a first connecting terminal and a second connecting terminal, each second filter includes a second resonator group and a second terminal, the second terminal is located on the substrate, and the second resonator group includes a third connecting terminal, which is connected to the second terminal; wherein the two first connecting terminals and the two third connecting terminals are located on opposite sides of the antenna terminal along the width direction of the substrate.

[0030] In one embodiment, the two first filters are respectively configured as a first receive filter and a first transmit filter, and the frequency bands of the first receive filter and the first transmit filter are different; and / or, the two second filters are respectively configured as a second receive filter and a second transmit filter, and the frequency bands of the second receive filter and the second transmit filter are different.

[0031] In one embodiment, the frequency band of the first receiving filter is the same as the frequency band of the second transmitting filter, and the frequency band of the second receiving filter is the same as the frequency band of the first transmitting filter.

[0032] In one embodiment, along the length direction of the substrate, the first connecting terminal of the first receiving filter and the third connecting terminal of the second receiving filter are located on one side of the antenna terminal, and the first connecting terminal of the first transmitting filter and the third connecting terminal of the second transmitting filter are located on the other side of the antenna terminal.

[0033] In one embodiment, the RF front-end module further includes a second inductor, one end of the second inductor is electrically connected to the antenna terminal, the other end of the second inductor is grounded, and the second inductor and the first inductor are spaced apart from each other.

[0034] In a third aspect, an embodiment of the present application provides a radio frequency front-end module, including a substrate, a first filter and a chip, the chip being arranged on the substrate, the first filter including a first resonator group and a first inductor, the first resonator group being arranged on the chip, the first inductor being arranged on the substrate, the first end of the first inductor being configured to be electrically connected to the first resonator group, and the second end of the first inductor being configured to be grounded;

[0035] The RF front-end module also includes a second inductor, which is arranged on the substrate and spaced apart from the first inductor, wherein the first end of the second inductor is configured to be connected to the antenna terminal, and the second end of the second inductor is configured to be grounded; wherein,

[0036] An extension direction of the first inductor from the first end of the first inductor to the second end of the first inductor is opposite to an extension direction of the second inductor from the first end of the second inductor to the second end of the second inductor.

[0037] The RF front-end module of the present application is provided with a second inductor connected to the antenna terminal so that the second inductor can adjust the impedance of the signal transmitted by the antenna terminal through its own larger inductance value, thereby achieving impedance matching within the RF front-end module of the present application, reducing reflections during signal transmission, and thereby improving the signal transmission efficiency of the RF front-end module of the present application.

[0038] The RF front-end module of the present application also controls the winding directions of the first inductor and the second inductor so that the winding directions of the first inductor and the second inductor are opposite, so that after the first inductor and the second inductor are energized, the directions of the magnetic fields generated by the first inductor and the second inductor are opposite, thereby avoiding the influence of the impedance distribution due to the mutual coupling of the magnetic fields generated by the first inductor and the second inductor, thereby ensuring the isolation of the RF front-end module of the present application.

[0039] In one embodiment, the first inductor and / or the second inductor is a winding inductor.

[0040] In one embodiment, the first filter also includes a first terminal, which is configured to be electrically connected to an external circuit, and the first terminal is arranged on a substrate. The first resonator group includes a first connecting terminal and a second connecting terminal, and the first connecting terminal is connected to the first terminal, and the second connecting terminal is connected to the first inductor; wherein the distance between the first inductor and the second inductor is greater than the distance between the first connecting terminal and the second inductor.

[0041] In one embodiment, the RF front-end module also includes a second filter, the second filter includes a second resonator group and a second terminal, the second resonator group is arranged on the chip, the second resonator group is electrically connected to the second inductor, the second terminal is located on the substrate and is used to be electrically connected to the external circuit, the second resonator group includes a third connecting terminal, the third connecting terminal is connected to the second terminal; the second inductor is located between the first connecting terminal and the third connecting terminal along the width direction of the substrate.

[0042] In one embodiment, there are two first filters, and the second inductor is located between two first connection terminals along the length direction of the substrate; and / or there are two second filters, and the second inductor is located between two third connection terminals along the length direction of the substrate.

[0043] In a fourth aspect, an embodiment of the present application provides an electronic device, including a radio frequency front-end module.

[0044] It can be understood that the electronic device set provided in the fourth aspect of the present application, because it adopts the radio frequency front-end module provided in the first to third aspects of the present application, the electronic device of the present application also has good isolation and out-of-band suppression. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application;

[0046] Figure 2 This is a schematic diagram of the structure of a radio frequency front-end module provided in one embodiment of the present application;

[0047] Figure 3 A schematic diagram of a partial structure of a radio frequency front-end module provided in one embodiment of the present application;

[0048] Figure 4 This is a schematic diagram of the structure of a first filter in a radio frequency front-end module provided in an embodiment of the present application;

[0049] Figure 5 Another partial structural diagram of a radio frequency front-end module provided in one embodiment of the present application;

[0050] Figure 6 Another structural schematic diagram of a radio frequency front-end module provided in one embodiment of the present application;

[0051] Figure 7 This is another partial structural diagram of a radio frequency front-end module provided in one embodiment of the present application;

[0052] Figure 8 This is another partial structural diagram of a radio frequency front-end module provided in one embodiment of the present application;

[0053] Fig. 9 This is another structural schematic diagram of a radio frequency front-end module provided in one embodiment of the present application;

[0054] Fig.10 A schematic diagram of the structure of a second sub-board provided in an embodiment of the present application;

[0055] Fig.11 A schematic cross-sectional structure diagram of a radio frequency front-end module provided in one embodiment of the present application;

[0056] Fig.12 Another structural schematic diagram of the second sub-board of the radio frequency front-end module provided in one embodiment of the present application;

[0057] Fig.13 This is another structural schematic diagram of the second sub-board of the radio frequency front-end module provided in one embodiment of the present application;

[0058] Fig.14 A schematic diagram of the structure of a first sub-board provided in an embodiment of the present application;

[0059] Fig.15 A schematic diagram of the structure of a third sub-board provided in an embodiment of the present application;

[0060] Fig.16 A schematic diagram of a top view of the structure of a radio frequency front-end module provided in one embodiment of the present application;

[0061] Fig.17 Another cross-sectional structural schematic diagram of a radio frequency front-end module provided in one embodiment of the present application;

[0062] Fig.18 Another schematic diagram of the top view of the radio frequency front-end module provided in one embodiment of the present application;

[0063] Fig.19 This is another cross-sectional structural schematic diagram of a radio frequency front-end module provided in one embodiment of the present application;

[0064] Fig. 20 A comparison chart of out-of-band suppression curves of the RF front-end module of the present application and the filter in the comparative example;

[0065] Fig.21 Another out-of-band suppression curve comparison diagram of the RF front-end module of the present application and the filter in the comparative example;

[0066] Fig. 22 A comparison diagram of the isolation curves of the RF front-end module of the present application and the filter in the comparative example;

[0067] Fig.23Another isolation curve comparison diagram of the RF front-end module of the present application and the filter in the comparative example. DETAILED DESCRIPTION

[0068] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0069] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, 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 a limitation to the present application.

[0070] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification, claims, and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "include" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0072] See also Figure 1 The structure diagram of the electronic device 200 provided in one embodiment of the present application is shown.

[0073] like Figure 1 As shown, the electronic device 200 of the present application includes a radio frequency front-end module 100. Among them, the antenna port 201 is electrically connected to the radio frequency front-end module 100. The radio frequency front-end module 100 in the present application can receive radio frequency signals through the antenna port 201, and can also transmit the amplified radio frequency signals through the antenna port 201. The main functions of the radio frequency front-end module include signal amplification, filtering, modulation and demodulation, etc. Exemplarily, the electronic device 200 includes at least one of a computer, a mobile phone, a tablet computer, a smart watch, and a navigator, etc., and the present application does not specifically limit this.

[0074] See also Figure 2 The figure shows a schematic diagram of the structure of a radio frequency front-end module 100 provided in one embodiment of the present application.

[0075] like Figure 2 As shown, the RF front-end module 100 includes a substrate 10, a first filter 21 and a chip 30. The chip 30 is arranged on the substrate 10 along the thickness direction of the substrate 10. The first filter 21 includes a first resonator group 211, a first terminal 212 and a first inductor 213. Among them, the first resonator group 211 is arranged on the chip 30. As an example: when the chip 30 is arranged on the substrate 10 in a flip chip manner, the first resonator group 211 is arranged on the surface of the chip 30 facing the substrate 10.

[0076] When the chip 30 is placed on the substrate 10 in a flip-chip manner, Figure 2 In the illustrated example, the first resonator group 211 is attached to the substrate 10, so that the first resonator group 211 uses the ground layer of the substrate 10 to achieve an electromagnetic shielding effect, thereby preventing signal leakage or interference from affecting the operation of the first resonator group 211. This ensures the working performance and working stability of the RF front-end module 100 of the present application.

[0077] In the embodiment of the present application, the first terminal 212 and the first inductor 213 are both disposed on the substrate 10, and the first terminal 212 and the first inductor 213 are arranged at intervals along the plane direction of the substrate 10. The first terminal 212 is electrically connected to the first resonator group 211, and the first terminal 212 is configured to be electrically connected to an external circuit.

[0078] That is, during the operation of the RF front-end module 100 of the present application, when the first filter 21 is a filter on the RF transmission path (TX), the first terminal 212 is configured to be connected to the output end of the power amplifier (PA), and the first terminal 212 is used to receive the RF amplified signal after amplification by the power amplifier (PA), and the RF amplified signal is filtered by the first filter 21 and then transmitted to the antenna terminal 40 for signal transmission. When the first filter 21 is a filter on the RF reception path (RX), the antenna terminal 40 receives the RF signal to be amplified and transmits it to the first filter 21, and the RF signal to be amplified is filtered by the first filter 21 and then transmitted to the first terminal 212, and the first terminal 212 is configured to be connected to the input end of the low noise amplifier (LNA), and the first terminal 212 is used to transmit the RF signal to be amplified to the low noise amplifier (LNA) for amplification.

[0079] The first inductor 213 in the first filter 21 is set to increase the suppression effect on high-frequency signals (such as second-order harmonic signals, third-order harmonic signals, fourth-order harmonic signals and other high-order harmonic signals), thereby suppressing the generation of high-frequency signals (such as second-order harmonic signals, third-order harmonic signals, fourth-order harmonic signals and other high-order harmonic signals) during the operation of the first filter 21, which is beneficial to the out-of-band suppression of the RF front-end module 100 of the present application.

[0080] In the embodiment of the present application, the first inductor 213 includes a first end 2131 and a second end 2132. The first end 2131 of the first inductor 213 is electrically connected to the first resonator group 211, and the second end 2132 of the first inductor 213 is grounded. It can be understood that the second end 2132 of the first inductor 213 is grounded, which is conducive to reducing signal reflection and interference and improving the working performance of the RF front-end module 100 of the present application.

[0081] Please see Figure 3 and Figure 4 ,in Figure 3 1 is a schematic diagram of a partial structure of a radio frequency front-end module 100 provided in an embodiment of the present application. Figure 4 1 is a schematic diagram of the structure of the first filter 21 in the RF front-end module 100 provided in an embodiment of the present application. For ease of description, Figure 3 In the figure, the relative position of the chip 30 is shown by the dotted line, and the relative position of the first inductor 213 is shown by the dotted line.

[0082] like Figure 3 and Figure 4As shown, the RF front-end module 100 of the present application further includes an antenna terminal 40, which is disposed on the substrate 10 and is spaced apart from the first terminal 212 and the first inductor 213 along the plane direction of the substrate 10. The antenna terminal 40 is electrically connected to the first resonator group 211, and the antenna terminal 40 is configured to be electrically connected to an external antenna.

[0083] That is, during the operation of the RF front-end module 100 of the present application, when the first filter 21 is configured as a transmitting filter, the first resonator group 211 is used to receive the signal input through the first terminal 212, and transmit the processed signal to the antenna terminal 40, and the antenna terminal 40 is used to transmit the signal processed by the first resonator group 211 to the external antenna, so as to output the signal outward through the antenna.

[0084] When the first filter 21 is configured as a receiving filter, the antenna terminal 40 is used to receive a signal received by an external antenna and transmit the signal to the first resonator group 211. The first resonator group 211 processes the signal and outputs it to the external circuit through the first terminal 212. Thus, the signal processing function of the first filter 21 is realized.

[0085] exist Figure 4 In the schematic diagram shown, the first resonator group 211 includes five series resonators 2111 and four parallel resonators 2112. The five series resonators 2111 are sequentially connected in series between the first terminal 212 and the antenna terminal 40, and one end of the four parallel resonators 2112 is connected between two adjacent series resonators 2111, wherein only one parallel resonator 2112 is connected between each two adjacent series resonators 2111.

[0086] The other ends of each two adjacent parallel resonators 2112 are connected to each other, thereby forming two groups of two parallel resonators 2112 connected to each other. The other end of one group of two parallel resonators 2112 connected to each other is grounded. The other end of the other group of two parallel resonators 2112 connected to each other is electrically connected to one end of the first inductor 213, and the other end of the first inductor 213 is grounded.

[0087] Specifically, the first resonator group 211 further includes a first connection terminal 2113 and a second connection terminal 2114, the first connection terminal 2113 is connected to the first terminal 212, and the second connection terminal 2114 is connected to the first inductor 213. Figure 4In the illustrated example, the first connection terminal 2113 is configured to be connected to the end of any series resonator 2111 at two opposite ends of the five series resonators 2111 that is not connected to the series resonator 2111, so as to be electrically connected to the first terminal 212. The second connection terminal 2114 is configured to be connected to the end of a group of two parallel resonators 2112 connected to each other that is away from the series resonator 2111, so as to be electrically connected to the first inductor 213.

[0088] It can be understood that in other embodiments, the number and connection method of the series resonators 2111 and the parallel resonators 2112 in the first resonator group 211 can also be other, and the present application does not impose any particular limitation on this.

[0089] In one embodiment, the first inductor 213 is connected to the other end of a group of two interconnected parallel resonators 2112 relatively far away from the antenna terminal 40 , so as to reduce the influence of the first inductor 213 on the antenna terminal 40 .

[0090] Specifically, in Figure 3 In the schematic diagram shown, the first terminal 212 is closer to the antenna terminal 40 than the first inductor 213. Since the first resonator group 211 is electrically connected to the first end 2131 of the first inductor 213, the antenna terminal 40 and the first terminal 212 respectively. In the RF front-end module 100 of the present application, the position of the first terminal 212 on the substrate 10 is relatively fixed. It can be understood that by arranging the first terminal 212 between the first inductor 213 and the antenna terminal 40, it is possible to avoid the connection between the first inductor 213 and the first resonator group 211 and the connection between the first resonator group 211 and the first terminal 212 from crossing each other, thereby reducing the cross wiring in the first filter 21.

[0091] In the prior art, in the solution of setting the first inductor between the antenna terminal and the first terminal, the connection line between the first terminal and the first resonator group crosses the connection line between the first inductor and the first resonator group. During the operation of the RF front-end module of the prior art, the transmission direction of the electrical signal transmitted from the first terminal to the first resonator group is opposite to the transmission direction of the electrical signal transmitted from the first resonator group to the first inductor. At this time, there is mutual coupling of magnetic fields in the cross-wiring area, which will affect the out-of-band suppression capability and isolation of the RF front-end module.

[0092] In the embodiment of the present application, the RF front-end module 100 of the present application sets the first terminal 212 between the first inductor 213 and the antenna terminal 40, which can reduce the cross-wiring in the first filter 21, thereby ensuring the isolation and out-of-band suppression of the RF front-end module 100 of the present application.

[0093] On the other hand, since the first resonator group 211 is electrically connected to the first terminal 212, it can be understood that the first resonator group 211 is relatively close to the first terminal 212 to reduce the line length required for the connection between the first resonator group 211 and the first terminal 212. That is, the position setting of the first resonator group 211 and the first terminal 212 of the RF front-end module 100 of the present application is conducive to the preparation of the RF front-end module 100 of the present application.

[0094] In the embodiment of the present application, since the relative positions of the first terminal 212 and the antenna terminal 40 are fixed during the actual manufacturing process of the RF front-end module 100 of the present application, the RF front-end module 100 of the present application sets the first terminal 212 between the first inductor 213 and the antenna terminal 40, which can increase the distance between the first inductor 213 and the antenna terminal 40, and is conducive to reducing the mutual coupling between the magnetic field generated by the first inductor 213 when working and the magnetic field near the antenna terminal 40, thereby reducing the influence of the first inductor 213 on the signal transmitted by the antenna terminal 40, thereby improving the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application, and improving the working performance of the RF front-end module 100 of the present application.

[0095] In one embodiment,

[0096] like Figure 2 and Figure 3 As shown, along the thickness direction of the substrate 10, the projection of the first connection terminal 2113 of the first resonator group 211 on the substrate 10 partially overlaps with the first terminal 212. Since the first connection terminal 2113 is electrically connected to the first terminal 212, the first connection terminal 2113 overlaps with the first terminal 212 in the thickness direction of the substrate 10, which is beneficial to reduce the connection between the first resonator group 211 and the first terminal 212, so as to facilitate the preparation of the RF front-end module 100 of the present application.

[0097] In another embodiment, along the thickness direction of the substrate 10 , the projection of the first connection terminal 2113 of the first resonator group 211 on the substrate 10 covers the first terminal 212 , which is not particularly limited in the present application.

[0098] Please see Figure 5 Another partial structural diagram of the RF front-end module 100 provided in one embodiment of the present application is shown. In order to facilitate the description of the positional relationship between the first resonator group 211 and the antenna terminal 40, Figure 5 The chip 30 of the RF front-end module 100 is omitted, and only the first connection terminal 2113 and the second connection terminal 2114 of the first resonator group 211 are shown.

[0099] like Figure 5As shown, the substrate 10 includes a first area 10a, the center of the first area 10a coincides with the geometric center of the substrate 10, the ratio of the diameter of the first area 10a to the width of the substrate 10 is 0.7, the antenna terminal 40 is located in the first area 10a, the projections of the first connection terminal 2113 and the second connection terminal 2114 of the first resonator group 211 on the substrate 10 are both located outside the first area 10a, and the first inductor 213 and the first terminal 212 are located outside the first area 10a.

[0100] Specifically, in Figure 5 In the schematic diagram shown, the substrate 10 is in a rectangular shape. The RF front-end module 100 of the present application arranges the antenna terminal 40 in the first area 10a so that the antenna terminal 40 is arranged in the central area of ​​the substrate 10, so that the antenna terminal 40 is conveniently connected to the first resonator group 211 and other resonator groups of the RF front-end module 100 of the present application.

[0101] On the other hand, since the antenna terminal 40 is configured to be electrically connected to an external antenna, the ratio of the diameter of the first region 10a to the width of the substrate 10 is set to 0.7, so as to reduce the influence of the magnetic field generated by the first filter 21 when it is working on the signal transmitted by the antenna terminal 40 while ensuring the normal operation of the first filter 21. This ensures the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0102] In one embodiment, the ratio of the diameter of the first region 10a to the width of the substrate 10 is 0.6. This allows the antenna terminal 40 to be disposed in the central region of the substrate 10, so that the antenna terminal 40 is connected to the first resonator group 211 and other resonator groups of the RF front-end module 100 of the present application. At the same time, the influence of the magnetic field generated by the first filter 21 when it is working on the signal transmitted by the antenna terminal 40 is reduced. This ensures the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0103] In one embodiment, the ratio of the diameter of the first region 10a to the width of the substrate 10 is 0.5. This allows the antenna terminal 40 to be disposed in the central region of the substrate 10, so that the antenna terminal 40 is connected to the first resonator group 211 and other resonator groups of the RF front-end module 100 of the present application. At the same time, the influence of the magnetic field generated by the first filter 21 when it is working on the signal transmitted by the antenna terminal 40 is reduced. This ensures the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0104] In one embodiment, the ratio of the diameter of the first region 10a to the width of the substrate 10 is 0.4. This allows the antenna terminal 40 to be disposed in the central region of the substrate 10, so that the antenna terminal 40 is connected to the first resonator group 211 and other resonator groups of the RF front-end module 100 of the present application. At the same time, the influence of the magnetic field generated by the first filter 21 when it is working on the signal transmitted by the antenna terminal 40 is reduced. This ensures the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0105] Please see Figure 6 and Figure 7 ,in Figure 6 Another structural diagram of a radio frequency front-end module 100 provided in an embodiment of the present application is shown in FIG. Figure 7 This is another partial structural diagram of the RF front-end module 100 provided in one embodiment of the present application.

[0106] like Figure 6 and Figure 7 As shown, the RF front-end module 100 of the present application also includes a second filter 22 separated from the first filter 21, the second filter 22 includes a second resonator group 221 and a second terminal 222, the second resonator group 221 is arranged on the chip 30, the second terminal 222 is located on the substrate 10, the second resonator group 221 is electrically connected between the antenna terminal 40 and the second terminal 222, and the second terminal 222 is used to be electrically connected to an external circuit.

[0107] That is, during the operation of the RF front-end module 100 of the present application, when the second filter 22 is configured as a transmitting filter, the second terminal 222 is used to receive a signal transmitted by an external circuit, the second resonator group 221 is used to receive and process a signal transmitted by the second terminal 222, and the antenna terminal 40 is used to receive and transmit a signal processed by the second resonator group 221. Thus, the signal processing function of the second filter 22 is realized.

[0108] exist Figure 7 In the schematic diagram shown, the shape of the substrate 10 is rectangular. Along the width direction of the substrate 10, the projection of the first resonator group 211 on the substrate 10 and the projection of the second resonator group 221 on the substrate 10 are arranged on both sides of the center line L of the substrate 10, wherein the center line L of the substrate 10 passes through the center point P of the substrate 10.

[0109] In the embodiment of the present application, the center point P of the substrate 10 is the center of the first area 10a. The RF front-end module 100 of the present application arranges the first resonator group 211 and the second resonator group 221 on both sides of the midline L to increase the spacing between the first resonator group 211 and the second resonator group 221, thereby avoiding mutual interference between the first filter 21 and the second filter 22 when they are working, thereby ensuring the working stability of the RF front-end module 100 of the present application.

[0110] In one embodiment, if Figure 6 and Figure 7 As shown, the second resonator group 221 is arranged on the surface of the chip 30 facing the substrate 10. Correspondingly, when the chip 30 is arranged on the substrate 10 in a flip chip manner, the second resonator group 221 is attached to the substrate 10, so that the second resonator group 221 uses the ground layer of the substrate 10 to achieve an electromagnetic shielding effect, thereby avoiding signal leakage or interference that affects the operation of the second resonator group 221. In this way, the working performance and working stability of the RF front-end module 100 of the present application are guaranteed.

[0111] The second resonator group 221 includes a third connection terminal 2211, which is connected to a second terminal 222 disposed on the substrate 10, and the projections of the third connection terminal 2211 and the second terminal 222 in the longitudinal direction at least partially overlap. This is beneficial to reduce the connection between the second resonator group 221 and the second terminal 222, so as to facilitate the preparation of the RF front-end module 100 of the present application.

[0112] In one embodiment, if Figure 7 As shown, the minimum spacing D between the first connection terminal 2113 and the center line L along the width direction of the substrate 10 is less than or equal to 0.2 times the width of the substrate 10. In the embodiment of the present application, the first inductor 213 is provided on the side of the first connection terminal 2113 away from the center line L. The RF front-end module 100 of the present application controls the minimum spacing D between the first connection terminal 2113 and the center line L to avoid affecting the arrangement of the first inductor 213 due to the excessive spacing between the first connection terminal 2113 and the center line L.

[0113] Please cooperate and participate Figure 8 FIG. 1 is another partial structural diagram of a RF front-end module 100 provided in accordance with an embodiment of the present application.

[0114] like Figure 8As shown, the number of the first filters 21 is two, and the antenna terminal 40 is located between the two first connection terminals 2113 along the length direction of the substrate 10; the number of the second filters 22 is two, and the antenna terminal 40 is located between the two third connection terminals 2211 along the length direction of the substrate 10. Based on the first resonator group 211 and the second resonator group 221 are arranged on opposite sides of the midline L. It can be understood that each first connection terminal 2113 and each third connection terminal 2211 are spaced around the periphery of the antenna terminal 40 to avoid the situation where the connection lines between each first resonator group 211 and each second resonator group 221 and the antenna terminal 40 are crossed. Thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0115] On the other hand, since the first filter 21 includes the first inductor 213, the two first connection terminals 2113 are arranged on opposite sides of the antenna terminal 40, which is conducive to ensuring the spacing between the two first inductors 213, thereby reducing the mutual influence of the two first inductors 213 when working, thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0116] In one embodiment, there are two first filters 21, and the antenna terminal 40 is located between two first resonator groups 211 corresponding to the two first filters 21 along the length direction of the substrate 10. The number of the second filters 22 can be one or two.

[0117] In one embodiment, the number of the second filters 22 is two, and the antenna terminal 40 is located between two second resonator groups 221 corresponding to the two second filters 22 along the length direction of the substrate 10. The number of the first filters 21 may be one or two.

[0118] In one embodiment, the difference in the spacing between the first connection terminals 2113 of any two first filters 21 and the antenna terminal 40 is less than or equal to 0.4 times the length of the substrate 10. Since the two first connection terminals 2113 are arranged on opposite sides of the antenna terminal 40 along the length direction of the substrate 10. The RF front-end module 100 of the present application controls the difference in the spacing between the two first connection terminals 2113 and the antenna terminal 40 to avoid the influence of the magnetic field generated by the first filter 21 when it is working on the antenna terminal 40 due to the close spacing between the antenna terminal 40 and one of the first connection terminals 2113, and can ensure the consistency of the performance of each filter 20.

[0119] That is, the difference in the spacing between the two first connection terminals 2113 and the antenna terminal 40 is controlled so that the spacing between the antenna terminal 40 and the two first connection terminals 2113 is relatively consistent, thereby reducing the influence of the first filter 21 on the antenna terminal 40 while ensuring the operation of the first filter 21, thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0120] In one embodiment, the difference in the spacing between any two third connection terminals 2211 and the antenna terminal 40 is less than or equal to 0.4 times the length of the substrate 10. Since the two third connection terminals 2211 are arranged on opposite sides of the antenna terminal 40 along the length direction of the substrate 10. The RF front-end module 100 of the present application controls the difference in the spacing between the two third connection terminals 2211 and the antenna terminal 40 to avoid the influence of the magnetic field generated by the second filter 22 when it is working on the antenna terminal 40 due to the antenna terminal 40 being too close to one of the third connection terminals 2211.

[0121] That is, the difference in the distance between the two third connection terminals 2211 and the antenna terminal 40 is controlled so that the distance between the antenna terminal 40 and the two third connection terminals 2211 is relatively consistent, thereby reducing the impact of the second filter 22 on the antenna terminal 40 while ensuring the operation of the second filter 22, thereby ensuring the consistency of the performance of the two second filters 22; thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0122] In one embodiment, the difference in the spacing between any of the first connection terminal 2113 and the third connection terminal 2211 and the antenna terminal 40 is less than or equal to 0.4 times the length of the substrate 10. Since the first connection terminal 2113 and the third connection terminal 2211 are arranged on opposite sides of the antenna terminal 40 along the width direction of the substrate 10. The RF front-end module 100 of the present application controls the difference in the spacing between the first connection terminal 2113 and the third connection terminal 2211 and the antenna terminal 40 respectively to avoid the influence of the magnetic field generated by the first filter 21 or the second filter 22 when the antenna terminal 40 is working on the antenna terminal 40 due to the close spacing between the antenna terminal 40 and the first connection terminal 2113 or the third connection terminal 2211.

[0123] That is, the difference in the spacing between the first connection terminal 2113 and the third connection terminal 2211 and the antenna terminal 40 is controlled so that the spacing between the antenna terminal 40 and the first connection terminal 2113 and the spacing between the antenna terminal 40 and the third connection terminal 2211 are relatively consistent, thereby reducing the influence of the first filter 21 and the second filter 22 on the antenna terminal 40 while ensuring the operation of the first filter 21 and the second filter 22, thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0124] In one embodiment, the number of first filters 21 is greater than or equal to three, the number of second filters 22 is greater than or equal to three, the first connection terminal 2113 and the second connection terminal 2114 of each first resonator group 211, and the third connection terminal 2211 of each second resonator group 221 are all surrounded by the periphery of the antenna terminal 40, and each first terminal 212 and each second terminal 222 are surrounded by the periphery of the antenna terminal 40.

[0125] Each first filter 21 and each second filter 22 cooperate with each other to realize the signal processing function of the RF front-end module 100 of the present application. In the embodiment of the present application, the number of the first filter 21 and the second filter 22 is set to be greater than or equal to three, which can increase the signal transmission bandwidth of the RF front-end module, so as to improve the selectivity of the RF front-end module 100 of the present application to the signal frequency band, thereby ensuring the signal transmission quality during the operation of the RF front-end module 100. Thereby improving the overall performance of the RF front-end module 100 of the present application.

[0126] Based on the influence of the first resonator group 211 and the second resonator group 221 on the signal transmission at the antenna terminal 40, the RF front-end module 100 of the present application surrounds each first connection terminal 2113, each second connection terminal 2114 and each third connection terminal 2211 at the periphery of the antenna terminal 40, so as to ensure the operation of each first resonator group 211 and each second resonator group 221 while ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0127] Since the first resonator group 211 is electrically connected to the first terminal 212 through the first connection terminal 2113, and the second resonator group 221 is electrically connected to the second terminal 222 through the third connection terminal 2211, the RF front-end module 100 of the present application surrounds each first connection terminal 2113 and each third connection terminal 2211 around the periphery of the antenna terminal 40, so that each first terminal 212 and each second terminal 222 surround the periphery of the antenna terminal 40, so as to avoid the connection between each first filter 21 and each second filter 22 affecting the signal transmission of the antenna terminal 40, and further ensure the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0128] In one embodiment, please refer to Figure 2 The substrate 10 includes a first sub-board 11, a second sub-board 12 and a third sub-board 13 stacked in sequence, and the antenna terminal 40 is located on the surface of the first sub-board 11 away from the second sub-board 12 along the thickness direction of the substrate 10, so that the antenna terminal 40 can be connected to an external antenna.

[0129] The first terminal 212 penetrates the substrate 10. Specifically, along the thickness direction of the substrate 10, part of the first terminal is arranged on the first sub-board 11 for electrical connection with the first resonator group 211, and part of the first terminal 212 is arranged on the third sub-board 13 for electrical connection with an external circuit. That is, the RF front-end module 100 itself is facilitated to electrically connect the RF front-end module 100 of the present application with an external circuit by passing the first terminal 212 through the substrate 10.

[0130] In one embodiment, the first terminal 212 can be electrically connected to the first connection terminal 2113 of the first resonator group 211 by directly setting a solder pad on the first sub-board 11, and the first terminal 212 can be electrically connected to the first connection terminal 2113 of the first resonator group 211 by using the solder pad.

[0131] In one embodiment, the first terminal 212 can be directly electrically connected to an external circuit. In another embodiment, the first terminal 212 can be electrically connected to an external circuit by setting a pad on the third sub-board 13.

[0132] The first inductor 213 is located on the surface of the second sub-board 12 facing the first sub-board 11. That is, the first inductor 213 is integrated inside the substrate 10 to reduce the thickness of the RF front-end module 100 of the present application, which is conducive to the miniaturization of the RF front-end module 100 of the present application. On the other hand, integrating the first inductor 213 into the substrate 10 can avoid the influence of electromagnetic interference on the first inductor 213, thereby ensuring that the first inductor 213 improves the out-of-band suppression capability of the RF front-end module 100 of the present application.

[0133] In one embodiment, there are multiple first filters 21 , each of which includes a first inductor 213 , and the first inductors 213 in different first filters 21 are located in different areas of the same sub-board.

[0134] For example, please refer to Fig. 9 and Fig.10 ,in Fig. 9 This is another structural diagram of the RF front-end module 100 provided in one embodiment of the present application. Fig.10A schematic diagram of the structure of a second sub-board 12 provided in an embodiment of the present application.

[0135] like Fig. 9 and Fig.10 As shown, the first inductors 213 in different first filters 21 are located in different areas of the second sub-board 12. Fig.10 In the schematic diagram shown, there are two first filters 21, and correspondingly, there are also two first inductors 213. Along the plane direction of the second sub-board 12, the two first inductors 213 are arranged at intervals to reduce the mutual influence of the magnetic field generated by the two first inductors 213 when working, thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0136] On the other hand, the first inductors 213 in different first filters 21 are located in different areas of the same sub-board to facilitate the preparation of the RF front-end module 100 of the present application.

[0137] In one embodiment, there are multiple first filters 21 , each of the first filters 21 includes a first inductor 213 , and the first inductors 213 in different first filters 21 are located on different sub-boards.

[0138] For example, please refer to Figure 11-13 ,in Fig.11 1 is a schematic cross-sectional structure diagram of a radio frequency front-end module 100 provided in an embodiment of the present application. Fig.12 Another structural schematic diagram of the second sub-board 12 provided in an embodiment of the present application is shown in FIG. Fig.13 This is another structural schematic diagram of the second sub-board 12 provided in an embodiment of the present application.

[0139] like Figure 11-13 As shown, the number of the first filters 21 is two, and correspondingly, the number of the first inductors 213 is also two. The number of the second sub-boards 12 is two, one of the first inductors 213 is located on the surface of the second sub-board 12 facing the first sub-board 11 relatively close to the first sub-board 11, and the other first inductor 213 is located on the surface of the other second sub-board 12 facing the first sub-board 11. It can be understood that the two first inductors 213 are arranged on different sub-boards to enhance the isolation effect between the two adjacent first inductors 213, thereby reducing the mutual influence of the magnetic field generated by the two adjacent first inductors 213 when working, thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0140] Please see Fig.14 The structure diagram of the first sub-board 11 provided by one embodiment of the present application is shown.

[0141] like Fig.14As shown, the first filter 21 further includes a third terminal 214, and the third terminal 214 is used to electrically connect the first inductor 213 and the first resonator group 211, and the antenna terminal 40 is spaced apart from the third terminal 214 along the plane direction of the substrate 10. That is, the first resonator group 211 is electrically connected to the first end 2131 of the first inductor 213 through the third terminal 214.

[0142] In one embodiment, if Fig.14 As shown, the third terminal 214 passes through the first sub-board 11 ; the substrate 10 also includes an isolation medium 14 , which is located on the surface of the first sub-board 11 away from the second sub-board 12 and is located between the antenna terminal 40 and the third terminal 214 along the planar direction of the substrate 10 .

[0143] Since the third terminal 214 is connected to the first end 2131 of the first inductor 213, when the first inductor 213 is working, the magnetic field generated by the first inductor 213 can act on the first sub-board 11 through the third terminal 214. The RF front-end module 100 of the present application increases the isolation between the third terminal 214 and the antenna terminal 40 by setting an isolation medium 14 between the third terminal 214 and the antenna terminal 40, and further reduces the influence of the magnetic field generated by the first inductor 213 when working on the antenna terminal 40. The isolation of the RF front-end module 100 of the present application is further improved.

[0144] In one embodiment, the isolation medium 14 surrounds the antenna terminal 40, and the isolation medium 14 is located between the antenna terminal 40 and the first terminal 212 along the plane direction of the substrate 10. That is, the isolation medium 14 is located between the antenna terminal 40 and the first resonator group 211 to increase the isolation between the first resonator group 211 and the antenna terminal 40, and further reduce the influence of the first resonator group 211 on the antenna terminal 40. The isolation of the RF front-end module 100 of the present application is further improved.

[0145] In one embodiment, the RF front-end module 100 also includes a second inductor 50, which is disposed on the substrate 10, one end of the second inductor 50 is electrically connected between the antenna terminal 40 and the first resonator group 211, the other end of the second inductor 50 is grounded, and the second inductor 50 and the first inductor 213 are spaced apart from each other.

[0146] The RF front-end module 100 of the present application is provided with a second inductor 50 connected to the antenna terminal 40, so that the second inductor 50 can adjust the impedance of the signal transmitted by the antenna terminal 40 through its own larger inductance value, thereby achieving impedance matching of the RF front-end module 100 of the present application, reducing reflections during signal transmission, and further improving the signal transmission efficiency of the RF front-end module 100 of the present application.

[0147] Please see Fig.15The schematic diagram of the structure of the third sub-board 13 provided in one embodiment of the present application is shown in FIG. Figure 12-14 .

[0148] like Figure 12-Figure 15 As shown, the RF front-end module 100 of the present application further includes a second isolation medium 15. The second isolation medium 15 is disposed on the surfaces of the two second sub-boards 12 and the surface of the third sub-board 13. In the embodiment of the present application, the second inductor 50 is disposed on the first sub-board 11 and the second sub-board 12, and one end of the second inductor 50 away from the first resonator group 211 is grounded through the fourth terminal 16, wherein the fourth terminal 16 runs through the third sub-board 13.

[0149] The first terminal 212 and the second terminal 222 both penetrate the substrate 10. Figure 13-14 In the schematic diagram shown, the second isolation medium 15 is used to surround the second inductor 50 to increase the isolation between the second inductor 50 and the first inductor 213, the first terminal 212 and the second terminal 222, thereby improving the isolation of the RF front-end module 100 of the present application.

[0150] exist Fig.15 In the schematic diagram shown, the second isolation medium 15 is used to surround the fourth terminal 16 to increase the isolation between the fourth terminal 16 and the first inductor 213, the first terminal 212 and the second terminal 222, respectively, thereby increasing the isolation between the second inductor 50 and the first inductor 213, the first terminal 212 and the second terminal 222, respectively, thereby improving the isolation of the RF front-end module 100 of the present application.

[0151] See also Fig.16 and Fig.17 ,in Fig.16 1 is a schematic diagram of a top view of a radio frequency front-end module 100 provided in an embodiment of the present application. Fig.17 Another cross-sectional structural diagram of a radio frequency front-end module 100 provided in an embodiment of the present application is shown. For ease of description, Fig.16 The relative position of the chip 30 is indicated by a dotted line.

[0152] like Fig.16 and Fig.17As shown, the RF front-end module 100 includes a substrate 10, four filters 20 and a chip 30. The chip 30 is arranged on the substrate 10 along the thickness direction of the substrate 10. Each filter 20 includes a resonator group 23. Among them, each resonator group 23 is arranged on the chip 30, for example: each resonator group 23 is arranged on the surface of the chip 30 facing the substrate 10. As an example: when the chip 30 is arranged on the substrate 10 in a flip chip manner (Flip chip), in an embodiment of the present application, each resonator group 23 is arranged on the chip 30 to ensure the stability of the RF signal generated when the resonator group 23 is working. Each resonator group 23 is used to implement the signal processing function of the corresponding filter 20.

[0153] In an embodiment of the present application, the RF front-end module 100 of the present application further includes an antenna terminal 40, which is respectively connected to each resonator group 23. Among them, during the operation of the RF front-end module 100 of the present application, when the filter 20 is configured as a transmitting filter, the resonator group 23 is used to process the signal input by the external circuit, and the antenna terminal 40 is used to receive the signal processed by the resonator group 23, and output the signal to the outside through the external antenna. When the filter 20 is configured as a receiving filter, the antenna terminal 40 is used to receive the signal input by the external antenna, and the resonator group 23 is used to process the signal transmitted by the antenna terminal 40 and output the processed signal to the external circuit. Thereby, the signal processing function of each filter 20 is realized.

[0154] exist Fig.16 In the schematic diagram shown, the connection terminals connecting each resonator group 23 to the substrate 10 are spaced around the periphery of the antenna terminal 40. This is to avoid the situation where the connection lines between each resonator group 23 and the antenna terminal 40 are crossed. This ensures the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application. At the same time, the position setting of each resonator group 23 also facilitates the electrical connection between each resonator group 23 and the antenna terminal 40.

[0155] At least two of the four filters 20 further include a first terminal 212 and a first inductor 213, both of which are disposed on the substrate 10, the first terminal 212 being electrically connected to the first connection terminal 2113 of the resonator group 23 of the corresponding filter 20, and the first inductor 213 being electrically connected to the second connection terminal 2114 of the resonator group 23 of the corresponding filter 20. Among them, the first inductor 213 can increase the suppression effect of the corresponding filter 20 on high-frequency signals, thereby suppressing the generation of high-frequency signals during the operation of the filter 20, which is beneficial to the out-of-band suppression of the RF front-end module 100 of the present application.

[0156] In one embodiment, if Fig.17As shown, the distance between the first inductor 213 and the antenna terminal 40 is greater than the distance between the corresponding first connection terminal 2113 and the antenna terminal 40. That is, the first inductor 213 is farther away from the antenna terminal 40 than the corresponding first connection terminal 2113.

[0157] Since the relative position of the antenna terminal 40 is fixed during the actual manufacturing process of the RF front-end module 100 of the present application, compared with the solution in the prior art where the first inductor is relatively close to the antenna terminal, the increase in the spacing between the first inductor 213 and the antenna terminal 40 in the RF front-end module 100 of the present application is conducive to reducing the mutual coupling between the magnetic field generated by the first inductor 213 when working and the magnetic field near the antenna terminal 40, thereby reducing the influence of the first inductor 213 on the signal transmitted by the antenna terminal 40, thereby improving the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application, and improving the working performance of the RF front-end module 100 of the present application.

[0158] In one embodiment, if Fig.16 As shown, the four filters 20 include two first filters 21 and two second filters 22, the resonator group 23 includes a first resonator group 211 and a second resonator group 221, each first filter 21 includes a first resonator group 211 and a first inductor 213, each first resonator group 211 includes a first connecting terminal 2113 and a second connecting terminal 2114, each second filter 22 includes a second resonator group 221 and a second terminal 222, the second terminal 222 is located on the substrate 10, and the second resonator group 221 includes a third connecting terminal 2211, which is connected to the second terminal 222; wherein the two first connecting terminals 2113 and the two third connecting terminals 2211 are located on opposite sides of the antenna terminal 40 along the width direction of the substrate 10.

[0159] The connection terminals connected to the substrate 10 based on each resonator group 23 are spaced around the periphery of the antenna terminal 40. It can be understood that each first connection terminal 2113, each second connection terminal 2114 and each third connection terminal 2211 are spaced around the periphery of the antenna terminal 40 to avoid the situation where the connection lines between each first resonator group 211 and each second resonator group 221 and the antenna terminal 40 are crossed. In this way, the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application are guaranteed.

[0160] On the other hand, since the first filter 21 includes the first inductor 213, the two first connection terminals 2113 are arranged on opposite sides of the antenna terminal 40, which is conducive to ensuring the spacing between the two first inductors 213, thereby reducing the mutual influence of the two first inductors 213 when working, thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0161] In one embodiment, the two first filters 21 are respectively configured as a first receiving filter 21a and a first transmitting filter 21b, and the frequency bands of the first receiving filter 21a and the first transmitting filter 21b are different, so that the RF front-end module 100 of the present application can selectively allow signals within a specific frequency range to pass through, or block other unnecessary frequency band signals, thereby effectively achieving frequency band isolation and ensuring signal clarity and transmission quality.

[0162] Exemplarily, the first receiving filter 21a is configured as a B1RX filter, and the first transmitting filter 21b is configured as a B3TX filter. Among them, B1RX refers to a receiving filter with a frequency band of B1, and B3TX filter refers to a transmitting filter with a frequency band of B3. It is worth mentioning that the B1 band and the B3 band are used to represent a specific working frequency band, and the actual bandwidth of the above two bands needs to be set based on the actual usage scenario.

[0163] In one embodiment, the two second filters 22 are respectively configured as a second receiving filter 22a and a second transmitting filter 22b, and the frequency bands of the second receiving filter 22a and the second transmitting filter 22b are different, so that the RF front-end module 100 of the present application can selectively allow signals within a specific frequency range to pass through, or block other unnecessary frequency band signals. Thus, frequency band isolation is effectively achieved, ensuring signal clarity and transmission quality.

[0164] Exemplarily, the second receiving filter 22a is configured as a B3RX filter, and the second transmitting filter 22b is configured as a B1TX filter. Among them, B3RX refers to a receiving filter with a frequency band of B3, and B1TX filter refers to a transmitting filter with a frequency band of B1. It is worth mentioning that the B1 band and the B3 band are used to represent a specific working frequency band, and the actual bandwidth of the above two bands needs to be set based on the actual usage scenario.

[0165] In one embodiment, the frequency band of the first receiving filter 21a is the same as the frequency band of the second transmitting filter 22b, and the frequency band of the second receiving filter 22a is the same as the frequency band of the first transmitting filter 21b. That is, the RF front-end module 100 of the present application sets a transmitting filter and a receiving filter for the same frequency band, so that the transmitting signal and the receiving signal in the frequency band are spaced from each other, thereby avoiding crosstalk between the transmitting signal and the receiving signal. This improves the signal quality of the RF front-end module 100 of the present application.

[0166] In one embodiment, if Fig.16As shown, along the length direction of the substrate 10, the first connection terminal 2113 of the first receiving filter 21a and the third connection terminal 2211 of the second receiving filter 22a are located on one side of the antenna terminal 40, and the first connection terminal 2113 of the first transmitting filter 21b and the third connection terminal 2211 of the second transmitting filter 22b are located on the other side of the antenna terminal 40. This increases the spacing between the transmitting filter and the receiving filter of the same frequency band, further avoiding crosstalk between the transmitting signal and the receiving signal. Further improve the signal quality of the RF front-end module 100 of the present application.

[0167] In one embodiment, the RF front-end module 100 further includes a second inductor 50 , one end of the second inductor 50 is electrically connected to the antenna terminal 40 , the other end of the second inductor 50 is grounded, and the second inductor 50 is spaced apart from the first inductor 213 .

[0168] The RF front-end module 100 of the present application is provided with a second inductor 50 connected to the antenna terminal 40, so that the second inductor 50 can adjust the impedance of the signal transmitted by the antenna terminal 40 through its own larger inductance value, thereby matching the impedance within the RF front-end module 100 of the present application, reducing reflections during signal transmission, and further improving the signal transmission efficiency of the RF front-end module 100 of the present application.

[0169] Please see Fig.18 and Fig.19 ,in Fig.18 FIG. 1 is another schematic top view of the structure of the RF front-end module 100 provided in one embodiment of the present application. Fig.19 This is another cross-sectional structural schematic diagram of the RF front-end module 100 provided in one embodiment of the present application.

[0170] like Fig.18 and Fig.19 As shown, the RF front-end module 100 includes a substrate 10, a first filter 21 and a chip 30. The chip 30 is arranged on the substrate 10 along the thickness direction of the substrate 10. The first filter 21 includes a first resonator group 211 and a first inductor 213. As an example: when the chip 30 is arranged on the substrate 10 in a flip chip manner, the first resonator group 211 is arranged on the surface of the chip 30 facing the substrate 10.

[0171] In the embodiment of the present application, the first inductor 213 is arranged on the substrate 10, and the first inductor 213 is arranged in the first filter 21 to enhance the suppression effect on high-frequency signals, thereby suppressing the generation of high-frequency signals during the operation of the first filter 21, which is beneficial to the out-of-band suppression of the RF front-end module 100 of the present application. In the embodiment of the present application, the first inductor 213 includes a first end 2131 and a second end 2132, the first end 2131 of the first inductor 213 is electrically connected to the first resonator group 211, and the second end 2132 of the first inductor 213 is grounded. It can be understood that the second end 2132 of the first inductor 213 is grounded, which is beneficial to reduce signal reflection and interference and improve the working performance of the RF front-end module 100 of the present application.

[0172] The RF front-end module 100 further includes a second inductor 50, which is disposed on the substrate 10 and spaced apart from the first inductor 213. The first end 51 of the second inductor 50 is configured to be electrically connected to the antenna terminal 40, and the second end 52 of the second inductor 50 is grounded.

[0173] The RF front-end module 100 of the present application is provided with a second inductor 50 connected to the antenna terminal 40, so that the second inductor 50 can adjust the impedance of the signal transmitted by the antenna terminal 40 through its own larger inductance value, thereby matching the impedance within the RF front-end module 100 of the present application, reducing reflections during signal transmission, and further improving the signal transmission efficiency of the RF front-end module 100 of the present application.

[0174] On the other hand, the RF front-end module 100 of the present application provides a spacing arrangement between the first inductor 213 and the second inductor 50 to reduce the mutual coupling of the magnetic fields generated when the first inductor 213 and the second inductor 50 are working, thereby improving the isolation of the RF front-end module 100 of the present application.

[0175] An extension direction of the first inductor 213 from the first end 2131 of the first inductor 213 to the second end 2132 of the first inductor 213 is opposite to an extension direction of the second inductor 50 from the first end 51 of the second inductor 50 to the second end 52 of the second inductor 50 .

[0176] Specifically, during the operation of the RF front-end module 100 of the present application, the extension direction of the first inductor 213 and the second inductor 50 is set so that the direction of the magnetic field generated by the first inductor 213 after power is supplied is opposite to the direction of the magnetic field generated by the second inductor 50 after power is supplied, thereby avoiding the mutual coupling of the magnetic fields generated by the first inductor 213 and the second inductor 50 to affect the impedance distribution, thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0177] In one embodiment, the first inductor 213 is a winding inductor to rationally utilize the space within the substrate 10 and enable the first inductor 213 to have a larger inductance value to further enhance the suppression effect of the first inductor 213 on high-frequency signals, thereby further suppressing the generation of high-frequency signals during the operation of the first filter 21, which is beneficial to the out-of-band suppression of the RF front-end module 100 of the present application.

[0178] In one embodiment, the second inductor 50 is a winding inductor to rationally utilize the space within the substrate 10 and make the second inductor 50 have a larger inductance value to further adjust the impedance of the signal transmitted by the antenna terminal 40, thereby achieving impedance matching within the RF front-end module 100 of the present application, reducing reflections during signal transmission, and thereby improving the signal transmission efficiency of the RF front-end module 100 of the present application.

[0179] In one embodiment, the first filter 21 further includes a first terminal 212, which is configured to be electrically connected to an external circuit, and is disposed on the substrate 10. The first resonator group 211 includes a first connection terminal 2113 and a second connection terminal 2114, wherein the first connection terminal 2113 is connected to the first terminal 212, and the second connection terminal 2114 is connected to the first inductor 213; wherein the distance between the first inductor 213 and the second inductor 50 is greater than the distance between the first connection terminal 2113 and the second inductor 50. Since the second inductor 50 is connected to the antenna terminal 40. That is, the first inductor 213 is farther away from the antenna terminal 40 than the first connection terminal 2113.

[0180] Since the relative position of the antenna terminal 40 is fixed during the actual manufacturing process of the RF front-end module 100 of the present application, the increase in the spacing between the first inductor 213 and the antenna terminal 40 in the RF front-end module 100 of the present application is conducive to reducing the mutual coupling between the magnetic field generated by the first inductor 213 when working and the magnetic field near the antenna terminal 40, thereby reducing the influence of the first inductor 213 on the signal transmitted by the antenna terminal 40, thereby improving the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application, and improving the working performance of the RF front-end module 100 of the present application.

[0181] In the embodiment of the present application, the distance between the first inductor 213 and the second inductor 50 is greater than the distance between the first connection terminal 2113 and the second inductor 50. Correspondingly, the first terminal is closer to the antenna terminal 40 than the first inductor 213, which can avoid the connection line between the first inductor 213 and the first resonator group 211 and the connection line between the first resonator group 211 and the first terminal 212 from crossing, thereby reducing the cross wiring in the first filter 21.

[0182] With respect to the prior art, the first inductor is arranged between the antenna terminal and the first terminal. The RF front-end module 100 of the present application arranges the first terminal 212 between the first inductor 213 and the antenna terminal 40, which can reduce the cross-wiring in the first filter 21, thereby ensuring the isolation and out-of-band suppression of the RF front-end module 100 of the present application.

[0183] On the other hand, since the first resonator group 211 is electrically connected to the first terminal 212, it can be understood that the first resonator group 211 is relatively close to the first terminal 212 to reduce the line length required for the connection between the first resonator group 211 and the first terminal 212. That is, the position setting of the first resonator group 211 and the first terminal 212 of the RF front-end module 100 of the present application is conducive to the preparation of the RF front-end module 100 of the present application.

[0184] In one embodiment, the RF front-end module 100 also includes a second filter 22, the second filter 22 includes a second resonator group 221 and a second terminal 222, the second resonator group 221 is arranged on the chip 30, the second resonator group 221 is electrically connected to the second inductor 50, the second terminal 222 is located on the substrate 10 and is used to be electrically connected to an external circuit, the second resonator group 221 includes a third connection terminal 2211, and the third connection terminal 2211 is connected to the second terminal 222; the second inductor 50 is located between the first connection terminal 2113 and the third connection terminal 2211 along the width direction of the substrate 10.

[0185] The RF front-end module 100 of the present application arranges the first connection terminal 2113 and the third connection terminal 2211 on both sides of the second inductor 50 to increase the distance between the first connection terminal 2113 and the third connection terminal 2211, thereby avoiding mutual interference between the first filter 21 and the second filter 22 when they are working, thereby ensuring the working stability of the RF front-end module 100 of the present application.

[0186] In one embodiment, the number of the first filters 21 is two, and the second inductor 50 is located between the two first connection terminals 2113 along the length direction of the substrate 10; the number of the second filters 22 is two, and the second inductor 50 is located between the two third connection terminals 2211 along the length direction of the substrate 10. Based on the first connection terminal 2113 and the third connection terminal 2211 are arranged on opposite sides of the second inductor 50. It can be understood that each first connection terminal 2113 and each third connection terminal 2211 are spaced around the periphery of the second inductor 50 to avoid the connection between each first resonator group 211 and each second resonator group 221 and the second inductor 50. Thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0187] On the other hand, since the first filter 21 includes the first inductor 213, the two first connection terminals 2113 are arranged on opposite sides of the second inductor 50, which is conducive to ensuring the spacing between the two first inductors 213, thereby reducing the mutual influence of the two first inductors 213 when working, thereby ensuring the out-of-band suppression capability and isolation of the RF front-end module 100 of the present application.

[0188] In one embodiment, the number of the first filters 21 is two, and the second inductor 50 is located between the first connection terminals 2113 of the two first resonator groups 211 along the length direction of the substrate 10. The number of the second filter 22 is one.

[0189] In one embodiment, the number of the second filters 22 is two, and the second inductor 50 is located between the first connection terminals 2113 of the two second resonator groups 221 along the length direction of the substrate 10. The number of the first filter 21 is one.

[0190] Based on the limitations of the above embodiments, out-of-band suppression is used to reflect system performance and stability. In the embodiments of the present application. Fig. 20 and Fig.21 This is a curve comparison of out-of-band suppression obtained based on different frequencies for the RF front-end module 100 of the present application and the filter in the comparative example. Fig. 22 and Fig.23 The horizontal axis is frequency in GHz, and the vertical axis is out-of-band suppression in dB.

[0191] For each embodiment and comparative example, the RF front-end module includes a substrate, four filter input / output terminals, an antenna terminal, and a chip. The chip is arranged on the substrate, and the antenna terminals are respectively connected to the resonator groups of each filter. The connection terminals of each resonator group connected to the substrate are spaced around the periphery of the antenna terminal. The four filters include two first filters and two second filters, each first filter includes a first resonator group and a first inductor, and each second filter includes a second resonator group; wherein the two first filters and the two second filters are located on opposite sides of the antenna terminal along the width direction of the substrate.

[0192] The two first filters are configured as a first receiving filter and a first transmitting filter, respectively. The first receiving filter is configured as a B1RX filter, and the first transmitting filter is configured as a B3TX filter. The two second filters are configured as a second receiving filter and a second transmitting filter, respectively, the second receiving filter is configured as a B3RX filter, and the second transmitting filter is configured as a B1TX filter. Along the length direction of the substrate, the first receiving filter and the second receiving filter are located on one side of the antenna terminal, and the first transmitting filter and the second transmitting filter are located on the other side of the antenna terminal.

[0193] In the embodiment of the present application, the number of the embodiment and the comparative example is one. Among them, the arrangement position of the first inductor of the first filter in the embodiment and the comparative example is different. In the embodiment, the first inductor 213 of the first filter 21 is farther away from the antenna terminal 40 than the first terminal 212. In the comparative example, the first inductor of the first filter is closer to the antenna terminal than the first terminal 212.

[0194] Since only the first filter has the first inductor. Fig. 20 It is a comparison diagram of the out-of-band suppression curves of the B1RX filter in the embodiment and the comparative example when working. Fig.21 It is a comparison diagram of the out-of-band suppression curves of the B3TX filter when working in the embodiment and the comparative example. Fig. 20 and Fig.21 The size relationship of the curves in the dotted box area is used to determine the out-of-band suppression capabilities of the embodiment and the comparative example.

[0195] like Fig. 20 and Fig.21 It can be seen that the out-of-band suppression capability of the RF front-end module 100 corresponding to the embodiment is better than the out-of-band suppression capability of the resonator corresponding to the comparative example. This is because the RF front-end module 100 of the present application increases the spacing between the first inductor 213 and the antenna terminal 40, which on the one hand avoids the influence of the cross wiring on the out-of-band suppression capability, and on the other hand reduces the mutual coupling between the magnetic field generated by the first inductor 213 when working and the magnetic field near the antenna terminal 40, thereby improving the out-of-band suppression capability of the RF front-end module 100.

[0196] Isolation is used to reflect the overall performance and stability of the system. In the embodiments of the present application. Fig. 22 and Fig.23 This is a curve comparison diagram of the isolation degree obtained based on different frequencies of the RF front-end module 100 of the present application and the filter in the comparative example. Fig. 22 and Fig.23 The horizontal axis is the frequency in GHz, and the vertical axis is the isolation in dB.

[0197] For each embodiment and comparative example, the corresponding resonator structure is the same as that of the above-mentioned embodiment and comparative example. Fig. 22 It is a comparison diagram of the isolation curves between the B1RX filter and the B3TX filter in the embodiment and the comparative example. Fig.23 1 is a comparison diagram of the isolation curves between the B1RX filter and the B1TX filter in the embodiment and the comparative example. Fig. 22 and Fig.23 The size relationship of the curves in the dotted line frame area is used to determine the isolation degree of the embodiment and the comparative example.

[0198] like Fig. 22 and Fig.23 It can be seen that the isolation of the RF front-end module 100 corresponding to the embodiment is better than the isolation of the resonator corresponding to the comparative example. This is because the RF front-end module 100 of the present application increases the distance between the first inductor 213 and the antenna terminal 40, reduces the mutual coupling between the magnetic field generated by the first inductor 213 when working and the magnetic field near the antenna terminal 40, and improves the isolation of the RF front-end module 100.

[0199] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0200] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0201] It should be understood that the application of the present application is not limited to the above examples. For ordinary technicians in the field, improvements or changes can be made according to the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application. Ordinary technicians in the field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A radio frequency front-end module, characterized in that: The invention comprises a substrate, a first filter, an antenna terminal and a chip, wherein the chip is arranged on the substrate, the first filter comprises a first terminal, a first resonator group and a first inductor, the first resonator group is electrically connected between the antenna terminal and the first terminal, the antenna terminal is configured to be electrically connected to an external antenna, the first terminal is configured to be electrically connected to an external circuit, a first end of the first inductor is electrically connected to the first resonator group, and a second end of the first inductor is grounded; The first resonator group is arranged on the chip, the antenna terminal and the first terminal are arranged on the substrate at intervals, and the first inductor is arranged on the substrate and is arranged at intervals from the antenna terminal and the first terminal; The first terminal is closer to the antenna terminal than the first inductor.

2. The RF front-end module according to claim 1, characterized in that: The first resonator group is arranged on the surface of the chip facing the substrate, and the first resonator group includes a first connecting terminal and a second connecting terminal, the first connecting terminal is connected to the first terminal arranged on the substrate, the second connecting terminal is connected to the first inductor, and the projections of the first connecting terminal and the first terminal in the longitudinal direction at least partially overlap.

3. The RF front-end module according to claim 2, characterized in that: The substrate includes a first area, the center of the first area coincides with the geometric center of the substrate, the ratio of the diameter of the first area to the width of the substrate is 0.7, the antenna terminal is located in the first area, the projections of the first connecting terminal and the second connecting terminal on the substrate are both located outside the first area, and the first inductor and the first terminal are located outside the first area.

4. The RF front-end module according to claim 3, characterized in that: The RF front-end module further includes a second filter spaced apart from the first filter, the second filter including a second resonator group and a second terminal, the second resonator group is disposed on the chip, the second terminal is located on the substrate, the second resonator group is electrically connected between the antenna terminal and the second terminal, and the second terminal is used to be electrically connected to an external circuit; Along the width direction of the substrate, a projection of the first resonator group on the substrate and a projection of the second resonator group on the substrate are arranged on both sides of a center line of the substrate, wherein the center line of the substrate passes through a center point of the substrate.

5. The RF front-end module according to claim 4, characterized in that: The second resonator group is arranged on the surface of the chip facing the substrate. The second resonator group includes a third connection terminal connected to the second terminal arranged on the substrate. The projections of the third connection terminal and the second terminal in the longitudinal direction at least partially overlap.

6. The RF front-end module according to claim 5, characterized in that: A minimum spacing between the first connection terminal and the center line along a width direction of the substrate is less than or equal to 0.2 times the width of the substrate.

7. The RF front-end module according to claim 5, characterized in that: The number of the first filters is two, and the antenna terminal is located between the two first connection terminals along the length direction of the substrate; and / or, The number of the second filters is two, and the antenna terminal is located between the two third connection terminals along the length direction of the substrate.

8. The RF front-end module according to claim 7, characterized in that: The difference in the distance between any two of the first connection terminals and / or the third connection terminals and the antenna terminal is less than or equal to 0.4 times the length of the substrate.

9. The RF front-end module according to claim 5, characterized in that: The number of the first filters is greater than or equal to three, the number of the second filters is greater than or equal to three, the first connection terminal and the second connection terminal of each of the first resonator groups, and the third connection terminal of each of the second resonators are all surrounded by the periphery of the antenna terminal, and each of the first terminals and each of the second terminals are surrounded by the periphery of the antenna terminal.

10. The RF front-end module according to any one of claims 1 to 9, characterized in that: The substrate includes a first sub-board, a second sub-board and a third sub-board stacked in sequence, the antenna terminal is located on a surface of the first sub-board facing away from the second sub-board along the thickness direction of the substrate, the first terminal passes through the substrate, and the first inductor is located on a surface of the second sub-board facing the first sub-board.

11. The RF front-end module according to claim 10, characterized in that: There are multiple first filters, each of which includes a first inductor. The first inductors in different first filters are located in different areas of the same sub-board, or the first inductors in different first filters are located on different sub-boards.

12. The RF front-end module according to claim 10, characterized in that: The first filter further includes a third terminal, the third terminal being used to electrically connect the first inductor and the first resonator group, and the antenna terminal is spaced apart from the third terminal along a plane direction of the substrate.

13. The RF front-end module according to claim 12, characterized in that: The third terminal penetrates the first sub-board; the substrate further comprises an isolation medium, which is located on a surface of the first sub-board facing away from the second sub-board and between the antenna terminal and the third terminal along a plane direction of the substrate.

14. The RF front-end module according to claim 13, characterized in that: The isolation medium surrounds the antenna terminal, and the isolation medium is located between the antenna terminal and the first terminal along a plane direction of the substrate.

15. The radio frequency front-end module according to any one of claims 1 to 9, characterized in that: The RF front-end module also includes a second inductor, which is arranged on the substrate, one end of the second inductor is electrically connected between the antenna terminal and the first resonator group, the other end of the second inductor is grounded, and the second inductor and the first inductor are spaced apart from each other.

16. A radio frequency front-end module, characterized in that: The invention comprises a substrate, an antenna terminal, a chip and four filters, wherein the chip and the antenna terminal are both arranged on the substrate, each of the filters comprises a resonator group, each of the resonator groups is arranged on the chip and is electrically connected to the antenna terminal respectively; wherein, The connection terminals of each resonator group connected to the substrate are spaced around the periphery of the antenna terminal; At least two of the four filters further include a first inductor and a first terminal, wherein the first terminal is configured to be electrically connected to an external circuit, the first terminal and the first inductor are both arranged on the substrate, the first terminal is electrically connected to the first connecting terminal of the resonator group of the corresponding filter, the first inductor is electrically connected to the second connecting terminal of the resonator group of the corresponding filter, and the distance between the first inductor and the antenna terminal is greater than the distance between the corresponding first connecting terminal and the antenna terminal.

17. The RF front-end module according to claim 16, characterized in that: The four filters include two first filters and two second filters, the resonator groups include a first resonator group and a second resonator group, each of the first filters includes the first resonator group and the first inductor, each of the first resonator groups includes the first connection terminal and the second connection terminal, each of the second filters includes the second resonator group and a second terminal, the second terminal is located on the substrate, and the second resonator group includes a third connection terminal, and the third connection terminal is connected to the second terminal; wherein, The two first connection terminals and the two third connection terminals are located at opposite sides of the antenna terminal along the width direction of the substrate.

18. The radio frequency front-end module according to claim 17, characterized in that: The two first filters are respectively configured as a first receiving filter and a first transmitting filter, and the frequency band of the first receiving filter is different from that of the first transmitting filter; and / or, the two second filters are respectively configured as a second receiving filter and a second transmitting filter, and the frequency band of the second receiving filter is different from that of the second transmitting filter.

19. The radio frequency front-end module according to claim 18, characterized in that: The frequency band of the first receiving filter is the same as the frequency band of the second transmitting filter, and the frequency band of the second receiving filter is the same as the frequency band of the first transmitting filter.

20. The radio frequency front-end module according to claim 19, characterized in that: Along the length direction of the substrate, the first connecting terminal of the first receiving filter and the third connecting terminal of the second receiving filter are located on one side of the antenna terminal, and the first connecting terminal of the first transmitting filter and the third connecting terminal of the second transmitting filter are located on the other side of the antenna terminal.

21. The radio frequency front-end module according to claim 17, characterized in that: The RF front-end module also includes a second inductor, one end of the second inductor is electrically connected to the antenna terminal, the other end of the second inductor is grounded, and the second inductor is spaced apart from the first inductor.

22. A radio frequency front-end module, characterized in that: The invention comprises a substrate, a first filter and a chip, wherein the chip is arranged on the substrate, the first filter comprises a first resonator group and a first inductor, the first resonator group is arranged on the chip, the first inductor is arranged on the substrate, a first end of the first inductor is configured to be electrically connected to the first resonator group, and a second end of the first inductor is configured to be grounded; The RF front-end module further includes a second inductor, which is disposed on the substrate and spaced apart from the first inductor, wherein a first end of the second inductor is configured to be connected to an antenna terminal, and a second end of the second inductor is configured to be grounded; wherein, An extending direction of the first inductor from the first end of the first inductor to the second end of the first inductor is opposite to an extending direction of the second inductor from the first end of the second inductor to the second end of the second inductor.

23. The radio frequency front-end module according to claim 22, characterized in that: The first inductor and / or the second inductor is a winding inductor.

24. The radio frequency front-end module according to claim 22 or 23, characterized in that: The first filter further includes a first terminal, the first terminal is configured to be electrically connected to an external circuit, the first terminal is disposed on the substrate, the first resonator group includes a first connection terminal and a second connection terminal, the first connection terminal is connected to the first terminal, and the second connection terminal is connected to the first inductor; wherein, A distance between the first inductor and the second inductor is greater than a distance between the first connecting terminal and the second inductor.

25. The radio frequency front-end module according to claim 24, characterized in that: The RF front-end module further includes a second filter, the second filter includes a second resonator group and a second terminal, the second resonator group is arranged on the chip, the second resonator group is electrically connected to the second inductor, the second terminal is located on the substrate and is used to be electrically connected to an external circuit, the second resonator group includes a third connection terminal, and the third connection terminal is connected to the second terminal; The second inductor is located between the first connection terminal and the third connection terminal along a width direction of the substrate.

26. The radio frequency front-end module according to claim 25, characterized in that: The number of the first filters is two, and the second inductor is located between the two first connection terminals along the length direction of the substrate; and / or, The number of the second filters is two, and the second inductor is located between the two third connection terminals along the length direction of the substrate.

27. An electronic device, characterized in that: Comprising a radio frequency front-end module as described in any one of claims 1-26.

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