electronic devices

Abstract

The electronic device includes: a first body; and a second body mounted on the first body, comprising an elastic wave element. The first body includes an input terminal, an output terminal, and a first circuit portion disposed between the input terminal and the output terminal in a circuit structure, and includes a low-pass filter and a high-pass filter. The elastic wave element is disposed between the first circuit portion and the output terminal in a circuit structure.

Description

Technical Field

[0001] This disclosure relates to an electronic device having a filter comprising an elastic wave element. Background Technology

[0002] Low-pass filters, high-pass filters, and band-pass filters are constructed using multiple resonators. Examples of resonators used in these filters include LC resonators, which use inductors and capacitors, and elastic wave resonators, which use elastic wave elements. Elastic wave elements are elements that utilize elastic waves. Among elastic wave elements are surface wave elements that utilize elastic surface waves and bulk elastic wave elements that utilize volume elastic waves.

[0003] Japanese Patent Application Publication No. 2020-28013 discloses a filter comprising a filter circuit including a series arm resonator and a parallel arm resonator, both composed of elastic wave resonators. The series arm resonator is positioned on a signal path connecting two input and output terminals. The parallel arm resonator is connected between one end of a circuit constituting at least a portion of the signal path and a grounding element. The filter also includes an integrated circuit connected to the filter circuit, which comprises capacitors and inductors connected in parallel.

[0004] In filter devices, if the input frequency is a signal lower than the passband, higher harmonics with frequencies that are integer multiples of the input signal may sometimes be generated in the filter section containing the elastic wave element. When the frequency of these higher harmonics is within the passband of the filter section, they superimpose as noise onto the signal that should be extracted by the filter device, resulting in a deterioration of the filter device's characteristics. Particularly in filter devices using elastic wave elements, there is a greater tendency to generate higher harmonics compared to filter devices using LC resonators.

[0005] The above problems are not limited to filter devices, but also apply to wave demultiplexers that contain elastic wave elements. Summary of the Invention

[0006] (a) Technical problems to be solved One of the purposes of this disclosure is to provide an electronic device capable of suppressing problems caused by elastic wave elements.

[0007] (II) Technical Solution An electronic device according to one embodiment of this disclosure includes: a first body; and a second body mounted on the first body, comprising an elastic wave element. The first body includes an input terminal, an output terminal, and a first circuit portion. The first circuit portion is structurally disposed between the input terminal and the output terminal, and includes a low-pass filter and a high-pass filter. The elastic wave element is structurally disposed between the first circuit portion and the output terminal.

[0008] (III) Beneficial Effects In the electronic device disclosed herein, a first body includes an input terminal, an output terminal, and a first circuit portion. The first circuit portion is structurally disposed between the input terminal and the output terminal and includes a low-pass filter and a high-pass filter. An elastic wave element is structurally disposed between the first circuit portion and the output terminal. Therefore, according to this disclosure, an electronic device capable of suppressing problems caused by the elastic wave element can be realized.

[0009] Other objects, features, and advantages of the present invention will become fully apparent from the following description. Attached Figure Description

[0010] Figure 1 This is a block diagram illustrating the structure of an electronic device according to an exemplary embodiment of the present disclosure.

[0011] Figure 2 This is a circuit diagram illustrating an example of the circuit structure of an electronic device according to an exemplary embodiment of the present disclosure.

[0012] Figure 3 This is a perspective view of an electronic device illustrating an exemplary embodiment of the present disclosure.

[0013] Figure 4 This is a perspective view showing the first body in an exemplary embodiment of the present disclosure.

[0014] Figure 5 This is a perspective view showing the first body in an exemplary embodiment of the present disclosure.

[0015] Figure 6 This is a characteristic diagram illustrating the attenuation characteristics of an electronic device according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0016] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, referring to... Figure 1 The structure of electronic device 1 according to an exemplary embodiment of the present disclosure will be described. Figure 1 This is a block diagram illustrating the structure of an electronic device 1 according to an exemplary embodiment. The electronic device 1 of the exemplary embodiment is configured to function as a bandpass filter that selectively allows signals of frequencies within a predetermined passband to pass through.

[0017] An exemplary embodiment of the electronic device 1 includes: a first terminal 2; a second terminal 3; and a first circuit portion 10, a second circuit portion 20, and a third circuit portion 30 disposed in the circuit structure between the first terminal 2 and the second terminal 3. The first terminal 2 corresponds to the "input terminal" in this disclosure. The second terminal 3 corresponds to the "output terminal" in this disclosure. In particular, in the exemplary embodiment, the first terminal 2 may be a terminal for connection to an antenna. The second terminal 3 may be a terminal for connection to at least one of a transmitting circuit and a receiving circuit, wherein the transmitting circuit is used to process a transmitted signal, and the receiving circuit is used to process a received signal. Furthermore, in the exemplary embodiment, the expression "in the circuit structure" refers to the configuration on the circuit diagram, rather than the configuration on the physical structure.

[0018] The first circuit section 10, the second circuit section 20, and the third circuit section 30 are arranged in this order from the first terminal 2 toward the second terminal 3. The first circuit section 10 includes a first filter 11 and a second filter 12. The first filter 11 is connected to the first terminal 2. The second filter 12 is disposed between the first filter 11 and the second circuit section 20 in the circuit structure.

[0019] The first filter 11 and the second filter 12 are each composed of an LC filter circuit including at least one inductor and at least one capacitor. The order of at least one of the first filter 11 and the second filter 12 can be 3rd order or higher.

[0020] The first filter 11 can be a low-pass filter. In this case, the first filter 11 is preferably a low-pass filter of order 3 or higher, and more preferably a low-pass filter of order 5 or higher.

[0021] The second filter 12 can be a high-pass filter. In this case, the second filter 12 is preferably a high-pass filter of order 3 or higher, and more preferably a high-pass filter of order 5 or higher.

[0022] exist Figure 1 The diagram shows an example where the first filter 11 is a low-pass filter and the second filter 12 is a high-pass filter. In this case, the first circuit section 10 as a whole becomes a band-pass filter.

[0023] The electronic device 1 also includes at least one elastic wave element. The at least one elastic wave element is disposed between the first circuit portion 10 and the second terminal 3 in the circuit structure. The at least one elastic wave element may be disposed in the second circuit portion 20, or in the third circuit portion 30, or in both the second circuit portion 20 and the third circuit portion 30.

[0024] The following description uses the case where at least one elastic wave element is provided in the second circuit section 20 as an example. In this case, the third circuit section 30 may include a high-pass filter. This high-pass filter may be constructed from an LC filter circuit that includes at least one inductor and at least one capacitor.

[0025] Next, refer to Figure 2 An example of the circuit structure of electronic device 1 will be described. Figure 2 This is a circuit diagram representing the circuit structure of electronic device 1. Figure 2 At least a portion of the circuit shown can be the actual circuit of electronic device 1, or an equivalent circuit of electronic device 1. First, the structure of the first circuit section 10 will be described. The first filter 11 of the first circuit section 10 includes inductors L11 and L12 and capacitors C1, C2, C3, and C4. One end of inductor L11 is connected to the first terminal 2. One end of inductor L12 is connected to the other end of inductor L11.

[0026] One end of capacitor C1 is connected to the junction of inductors L11 and L12. One end of capacitor C2 is connected to the other end of inductor L12. The other ends of capacitors C1 and C2 are each connected to ground.

[0027] Capacitor C3 is connected in parallel with inductor L11. Capacitor C4 is connected in parallel with inductor L12.

[0028] The second filter 12 of the first circuit section 10 includes inductors L13, L14, L15 and capacitors C5, C6, C7, C8, C9, C10, C11, and C12. One end of capacitor C5 is connected to the other end of inductor L12 of the first filter 11. One end of capacitor C6 is connected to the other end of capacitor C5.

[0029] One end of inductor L13 is connected to one end of capacitor C5. Capacitor C7 is connected in parallel with inductor L13. One end of capacitor C8 is connected to the other end of inductor L13. The other end of capacitor C8 is connected to ground.

[0030] One end of inductor L14 is connected to the junction of capacitors C5 and C6. Capacitor C9 is connected in parallel with respect to inductor L14. One end of capacitor C10 is connected to the other end of inductor L14. The other end of capacitor C10 is connected to ground.

[0031] One end of inductor L15 is connected to the other end of capacitor C6. Capacitor C11 is connected in parallel with inductor L15. One end of capacitor C12 is connected to the other end of inductor L15. The other end of capacitor C12 is connected to ground.

[0032] Next, the second circuit section 20 will be described. The second circuit section 20 includes capacitors C21 and C22 and elastic wave elements 21 and 22. Since the second circuit section 20 is disposed between the first circuit section 10 and the second terminal 3 in terms of circuit structure, it can be said that the elastic wave elements 21 and 22 are also disposed between the first circuit section 10 and the second terminal 3 in terms of circuit structure.

[0033] The elastic wave element 21 is positioned in the circuit structure along the path connecting the first terminal 2 and the second terminal 3, specifically along path 6 from the first terminal 2 to the second terminal 3. The elastic wave element 22 is positioned in the circuit structure between path 6 and the grounding element. Capacitor C21 is connected in parallel with the elastic wave element 21. Capacitor C22 is positioned in the circuit structure between the elastic wave element 22 and the grounding element.

[0034] The elastic wave element 21 has a first end 21a and a second end 21b located on the opposite side of the first end 21a. The elastic wave element 22 has a third end 22a and a fourth end 22b located on the opposite side of the third end 22a. The first end 21a of the elastic wave element 21 is connected to the other end of the capacitor C6 of the second filter 12. The second end 21b of the elastic wave element 21 is connected to the third end 22a of the elastic wave element 22. One end of the capacitor C22 is connected to the fourth end 22b of the elastic wave element 22.

[0035] The second circuit section 20 further includes an LC parallel circuit 23 in which an inductor and a capacitor are connected in parallel. The LC parallel circuit 23 is structurally positioned between the elastic wave element 22 and the grounding element. In an exemplary embodiment, the LC parallel circuit 23 specifically includes an inductor L21 and a capacitor C23. One end of the inductor L21 is connected to the other end of the capacitor C22. The capacitor C23 is connected in parallel with respect to the inductor L21. The other end of the inductor L21 is connected to the grounding element.

[0036] Next, the third circuit section 30 will be described. The third circuit section 30 includes inductors L31 and L32 and capacitors C31, C32, and C33. One end of capacitor C31 is connected to the second terminal 21b of the elastic wave element 21 of the second circuit section 20. One end of inductor L31 is connected to the other end of capacitor C31. The other end of inductor L31 is connected to the second terminal 3.

[0037] One end of capacitor C32 is connected to the other end of capacitor C31. One end of inductor L32 is connected to the other end of capacitor C32. Capacitor C33 is connected in parallel with inductor L32. The other end of inductor L32 is connected to ground.

[0038] exist Figure 2In the example shown, no elastic wave element other than elastic wave element 21 is provided on the path 6 connecting the first terminal 2 and the second terminal 3. Furthermore, no elastic wave element other than elastic wave element 22 is provided in the circuit structure between the path 6 and the grounding member.

[0039] In addition, Figure 2 In the example shown, elastic wave elements 21 and 22 are not electrically connected to the grounding element. That is, the portions of the conductors electrically connected to the first end 21a and the second end 21b of the elastic wave element 21 are not electrically connected to the grounding element because at least one capacitor is present in the path. Similarly, the portions of the conductors electrically connected to the third end 22a and the fourth end 22b of the elastic wave element 22 are not electrically connected to the grounding element because at least one capacitor is present in the path.

[0040] If we focus on the elastic wave element 21, in the circuit structure, electronic device 1 has a first path and a second path. The first path runs from the first end 21a of the elastic wave element 21 to the grounding element, and the second path runs from the second end 21b of the elastic wave element 21 to the grounding element, without passing through the same elements as the first path or the elastic wave element 22. The portion of the conductor in the first path that is electrically connected to the first end 21a of the elastic wave element 21 is not electrically connected to the grounding element through capacitors C6, C12, or C21 present in the first path. The portion of the conductor in the second path that is electrically connected to the second end 21b of the elastic wave element 21 is not electrically connected to the grounding element through capacitors C21 or C31 present in the second path.

[0041] If we focus on the elastic wave element 22, in the circuit structure, electronic device 1 has a third path and a fourth path. The third path runs from the third terminal 22a of the elastic wave element 22 to the grounding element without passing through the elastic wave element 21. The fourth path runs from the fourth terminal 22b of the elastic wave element 22 to the grounding element. The portion of the conductor in the third path connected to the third terminal 22a of the elastic wave element 22 is not electrically connected to the grounding element through a capacitor C21 or capacitor C31 present in the third path. The portion of the conductor in the fourth path connected to the fourth terminal 22b of the elastic wave element 22 is not electrically connected to the grounding element through a capacitor C22 present in the fourth path.

[0042] Next, refer to Figures 1 to 5 The other structures of electronic device 1 will be described. Figure 3 This is a three-dimensional diagram representing electronic device 1. Figure 4 as well as Figure 5This is a perspective view showing the first body. An exemplary embodiment of the electronic device 1 includes a first body 50 and a second body 60 mounted on the first body 50.

[0043] First, the structure of the first body 50 will be described. The first body 50 includes multiple stacked dielectric layers and multiple conductors (multiple conductor layers and multiple vias). Each of the multiple dielectric layers is made of a dielectric material. For example, low-temperature co-fired ceramic (LTCC) is used as the dielectric material.

[0044] Figure 2 The inductors L11-L15, L21, L31, L32 and capacitors C1-C12, C21-C23, C31-C33 shown are composed of a plurality of conductors disposed within the first body 50. That is, the first body 50 includes inductors L11-L15, L21, L31, L32 and capacitors C1-C12, C21-C23, C31-C33.

[0045] Inductors L11 and L12 and capacitors C1 to C4 are Figure 1 The components of the first filter 11 shown are inductors L13 to L15 and capacitors C5 to C12. Figure 1 The components of the second filter 12 shown are the first filter 11 and the second filter 12. Figure 1 The first circuit portion 10 shown is composed of the following elements. Therefore, it can also be said that the first body 50 includes the first filter 11 and the second filter 12, and includes the first circuit portion 10.

[0046] In addition, inductor L21 and capacitors C21 to C23 are Figure 1 A portion of the constituent elements of the second circuit portion 20 shown is the portion after removing the elastic wave elements 21 and 22 from the second circuit portion 20. Therefore, it can also be said that the first body 50 includes a portion of the constituent elements of the second circuit portion 20, which is the portion after removing the elastic wave elements 21 and 22 from the second circuit portion 20.

[0047] In addition, inductors L31 and L32 and capacitors C31 to C33 are Figure 1 The components of the third circuit section 30 shown. Therefore, it can also be said that the first body 50 includes the third circuit section 30.

[0048] The first body 50 has a first surface 50A and a second surface 50B located at both ends of the stacking direction T of the plurality of dielectric layers, and four side surfaces 50C to 50F connecting the first surface 50A and the second surface 50B. Side surfaces 50C and 50D face opposite sides to each other, and side surfaces 50E and 50F also face opposite sides to each other. Side surfaces 50C to 50F are perpendicular to the first surface 50A and the second surface 50B.

[0049] Here, as Figures 3 to 5 As shown, the X, Y, and Z directions are defined. The X, Y, and Z directions are orthogonal to each other. In an exemplary embodiment, a direction parallel to the stacking direction T is designated as the Z direction. The Z direction is also parallel to the direction in which the first body 50 and the second body 60 are arranged. Furthermore, a direction opposite to the X direction is designated as the -X direction, a direction opposite to the Y direction as the -Y direction, and a direction opposite to the Z direction as the -Z direction. Additionally, the phrase "when viewed from a specified direction (e.g., the stacking direction T)" means viewing the object from a separate position along the specified direction or a direction parallel to the specified direction; that is, viewing the object from above from a separate position along the specified direction or a direction parallel to the specified direction.

[0050] like Figures 3 to 5 As shown, the first surface 50A is located at the Z-direction end of the first body 50. The first surface 50A is both the upper surface of the first body 50 and the mounting surface for mounting the second body 60. The second surface 50B is located at the -Z-direction end of the first body 50. The second surface 50B is also the bottom surface of the first body 50. Figure 4 This refers to the first main body 50 as viewed from the first side 50A. Figure 5 This refers to the first main body 50 as viewed from the second side 50B.

[0051] Side 50C is located at the end of the first body 50 in the -X direction. Side 50D is located at the end of the first body 50 in the X direction. Side 50E is located at the end of the first body 50 in the -Y direction. Side 50F is located at the end of the first body 50 in the Y direction.

[0052] The first body 50 further includes a plurality of electrodes 111, 112, 113, 114, 115, 116, 117, 118, and 119 disposed on a second surface 50B of the first body 50. Electrodes 111, 112, and 113 are arranged in this order along the X direction at a position closer to the side surface 50E than the side surface 50E. Electrodes 115, 116, and 117 are arranged in this order along the -X direction at a position closer to the side surface 50F than the side surface 50E.

[0053] Electrode 114 is disposed between electrodes 113 and 115. Electrode 118 is disposed between electrodes 111 and 117. Electrode 119 is disposed between electrodes 112 and 116. In addition, electrode 119 is disposed approximately at the center of the second surface 50B.

[0054] Electrode 118 corresponds to the first terminal 2. Electrode 114 corresponds to the second terminal 3. Therefore, the first terminal 2 and the second terminal 3 are disposed on the second surface 50B of the first body 50. Electrodes 111, 112, 113, 115, 116, 117, and 119 are each connected to a grounding element.

[0055] The first body 50 also includes four electrodes 121, 122, 123, and 124 disposed on a first surface 50A of the first body 50. Electrodes 121 and 122 are arranged in this order along the X direction. Electrodes 123 and 124 are arranged in this order along the X direction in front of electrodes 121 and 122 in the -Y direction.

[0056] In an exemplary embodiment, electrode 121 is positioned closer to electrode 123 than electrode 124. Electrode 122 is positioned closer to electrode 124 than electrode 123.

[0057] Next, the structure of the second body 60 will be described. The second body 60 includes... Figure 2 The elastic wave elements 21 and 22 are shown. Additionally, the second body 60 has a third surface 60A and a fourth surface 60B located at both ends of the stacking direction T, and four side surfaces 60C, 60D, 60E, and 60F connecting the third surface 60A and the fourth surface 60B. The four side surfaces 60C to 60F are perpendicular to the third surface 60A and the fourth surface 60B.

[0058] The third surface 60A is located at the Z-direction end of the second body 60. The third surface 60A is also the upper surface of the second body 60. The fourth surface 60B is located at the -Z-direction end of the second body 60. The fourth surface 60B is both the bottom surface of the second body 60 and the opposing surface to the first surface 50A of the first body 50.

[0059] The second body 60 also includes four terminals 61, 62, 63, and 64 disposed on the fourth surface 60B. When the second body 60 is mounted on the first body 50, terminals 61 to 64 are respectively opposed to electrodes 121 to 124 of the first body 50. Terminals 61 to 64 are physically connected to electrodes 121 to 124, for example, via solder bumps 7.

[0060] The first end 21a of the elastic wave element 21 is connected to terminal 61. The second end 21b of the elastic wave element 21 is connected to terminal 62. The third end 22a of the elastic wave element 22 is connected to terminal 63. The fourth end 22b of the elastic wave element 22 is connected to terminal 64. Since terminals 61 to 64 are respectively connected to electrodes 121 to 124, the first end 21a, the second end 21b of the elastic wave element 21, the third end 22a of the elastic wave element 22, and the fourth end 22b of the elastic wave element 22 are respectively connected to electrodes 121, 122, 123, and 124.

[0061] The electronic device 1 may also include a sealing portion (not shown) that seals the second body 60. The sealing portion may cover the periphery of the second body 60 and at least a portion of the first surface 50A of the first body 50. The sealing portion may also further cover the sides 50C to 50F of the first body 50. The sealing portion may be made of an insulating material, for example, containing resin.

[0062] Next, an example of the characteristics of electronic device 1 according to an exemplary embodiment is shown. Figure 6 This is a characteristic diagram representing the attenuation characteristics of electronic device 1. Figure 6 In the diagram, the horizontal axis represents frequency, and the vertical axis represents attenuation. Figure 6 The frequency domain representation of the attenuation characteristics shown, where the absolute value of the attenuation is close to 0, represents the passband of electronic device 1. Figure 6 The diagram illustrates the characteristics of electronic device 1 when its passband is designed to cover a frequency band of 5150 MHz to 7125 MHz. From... Figure 6 It can be seen that the electronic device 1 of the exemplary embodiment has sufficient characteristics as a bandpass filter in practical applications.

[0063] Next, the function and effects of the electronic device 1 in the exemplary embodiment will be described. In the exemplary embodiment, the first body 50 includes a first terminal 2, a second terminal 3, and a first circuit portion 10. The first circuit portion 10 is disposed between the first terminal 2 and the second terminal 3 in a circuit structure, and includes a first filter 11 and a second filter 12. Elastic wave elements 21 and 22 are disposed between the first circuit portion 10 and the second terminal 3 in a circuit structure. In particular, in the exemplary embodiment, the first filter 11 is a low-pass filter, and the second filter 12 is a high-pass filter.

[0064] Here, consider the case where a signal with a frequency lower than the passband signal of the electronic device 1 is input to the second circuit section 20 from the first terminal 2 side. Since elastic wave elements 21 and 22 are provided in the second circuit section 20, there is a possibility that high-order harmonics with frequencies that are integer multiples of the aforementioned signal may be generated in the second circuit section 20 due to the elastic wave elements 21 and 22. For example, if the frequency of the signal input to the second circuit section 20 is 2.5 GHz, a high-order harmonic of 5 GHz as a second harmonic may be generated. When the passband of the electronic device 1 is in the frequency band around 5 GHz, the high-order harmonics superimpose as noise onto the signal that should be extracted by the electronic device 1, resulting in a deterioration of the characteristics of the electronic device 1.

[0065] In contrast, in an exemplary embodiment, elastic wave elements 21 and 22 are disposed between the first circuit section 10 and the second terminal 3. Signals input to the first terminal 2 are input via the first circuit section 10 to the second circuit section 20, which includes the elastic wave elements 21 and 22. The first circuit section 10 includes a high-pass filter. In particular, in the exemplary embodiment, the second filter 12 is a high-pass filter. According to the exemplary embodiment, signals that cause the aforementioned higher harmonics can be removed by the high-pass filter. Therefore, according to the exemplary embodiment, problems caused by higher harmonics resulting from the elastic wave elements 21 and 22 can be suppressed.

[0066] Furthermore, in an exemplary embodiment, the second circuit section 20 may be configured such that its passband includes a filter with a frequency 1.5 to 3 times the cutoff frequency of the high-pass filter (second filter 12). Therefore, according to the exemplary embodiment, problems caused by second harmonics can be primarily suppressed.

[0067] Furthermore, in the exemplary embodiment, both the first filter 11 and the second filter 12 of the first circuit section 10 are LC filter circuits disposed within the first main body 50. Compared with filter circuits containing elastic wave elements, LC filter circuits are able to suppress the generation of higher harmonics. Thus, according to the exemplary embodiment, problems caused by higher harmonics can also be suppressed.

[0068] Furthermore, in the exemplary embodiment, the elastic wave elements 21 and 22 are not electrically connected to the grounding element. Additionally, in the exemplary embodiment, the elastic wave elements 21 and 22 are not electrically connected to the first terminal 2 and the second terminal 3. Specifically, in the exemplary embodiment, the first terminal 2 and the second terminal 3 are not electrically connected to each other, and the electrode 118 corresponding to the first terminal 2 and the electrode 114 corresponding to the second terminal 3 are not electrically connected to other electrodes. Therefore, in the exemplary embodiment, even if electrostatic discharge occurs near the electronic device 1 and a voltage is applied to the electrodes 111-119, no current flows in the elastic wave elements 21 and 22. Thus, according to the exemplary embodiment, problems caused by damage to the elastic wave elements 21 and 22 due to electrostatic discharge can be suppressed.

[0069] Furthermore, this disclosure is not limited to the exemplary embodiments described above, and various modifications are possible. This disclosure is not limited to... Figure 2 The electronic device with the circuit structure shown can be applied to electronic devices with various circuit structures, provided it meets the requirements of the claims. For example, the number of elastic wave elements included in electronic device 1 can be three or more.

[0070] In addition, at least one of the first filter 11 and the second filter 12 may be a filter other than a low-pass filter such as a band-pass filter or a high-pass filter.

[0071] Alternatively, electronic device 1 can also be used by inputting signals from the second terminal 3.

[0072] As described above, an electronic device according to one embodiment of the present disclosure includes: a first body; and a second body mounted on the first body, comprising an elastic wave element. The first body includes an input terminal, an output terminal, and a first circuit portion disposed between the input terminal and the output terminal in a circuit structure, and includes a low-pass filter and a high-pass filter. The elastic wave element is disposed between the first circuit portion and the output terminal in a circuit structure.

[0073] In one embodiment of the electronic device disclosed herein, the input terminal may be a terminal for connection to an antenna. The output terminal may be a terminal for connection to at least one of a transmitting circuit and a receiving circuit, wherein the transmitting circuit is used to process transmitted signals and the receiving circuit is used to process received signals.

[0074] In addition, in one embodiment of the electronic device disclosed herein, a low-pass filter may be disposed in the circuit structure between the input terminal and the high-pass filter.

[0075] In addition, in one embodiment of the electronic device disclosed herein, at least one of the low-pass filter and the high-pass filter may be of order 3 or higher.

[0076] Furthermore, the electronic device according to one embodiment of this disclosure may also include a second circuit section comprising an elastic wave element. The passband of the second circuit section may include a frequency 1.5 to 3 times the cutoff frequency of the high-pass filter.

[0077] In addition, in one embodiment of the electronic device disclosed herein, the elastic wave element may be disposed on the path connecting the input terminal and the output terminal.

[0078] Additionally, in one embodiment of the electronic device disclosed herein, the first body may further include a capacitor. The capacitor may be connected in parallel with respect to the elastic wave element.

[0079] In addition, in one embodiment of the electronic device disclosed herein, no other elastic wave element may be provided on the path connecting the input terminal and the output terminal.

[0080] In addition, in one embodiment of the electronic device disclosed herein, the elastic wave element may be disposed in the circuit structure between the path connecting the input terminal and the output terminal and the grounding element.

[0081] In addition, in one embodiment of the electronic device disclosed herein, the first body may further include a capacitor. The capacitor may be disposed in the circuit structure between the elastic wave element and the grounding element.

[0082] In addition, in one embodiment of the electronic device disclosed herein, the first body may further include an LC parallel circuit in which an inductor and a capacitor are connected in parallel. The LC parallel circuit may be disposed between the elastic wave element and the grounding element in the circuit structure.

[0083] In addition, in one embodiment of the electronic device disclosed herein, no other elastic wave element may be provided in the circuit structure between the path connecting the input terminal and the output terminal and the grounding element.

[0084] Based on the foregoing description, it is evident that various methods and variations of this disclosure can be implemented. Therefore, within the scope equivalent to the claims, this disclosure may also be implemented in ways other than the exemplary embodiments described above.

Claims

1. An electronic device, characterized in that, have: The first subject; and The second body, mounted on the first body, includes an elastic wave element. The first main body includes an input terminal, an output terminal, and a first circuit section. The first circuit section is disposed between the input terminal and the output terminal in terms of circuit structure, and includes a low-pass filter and a high-pass filter. The elastic wave element is disposed between the first circuit section and the output terminal in the circuit structure.

2. The electronic device according to claim 1, characterized in that, The input terminal is a terminal used for connecting to an antenna. The output terminal is a terminal for connection to at least one of a transmitting circuit and a receiving circuit, wherein the transmitting circuit is used to process a transmitted signal and the receiving circuit is used to process a received signal.

3. The electronic device according to claim 1, characterized in that, The low-pass filter is positioned between the input terminal and the high-pass filter in the circuit structure.

4. The electronic device according to claim 1, characterized in that, At least one of the low-pass filter and the high-pass filter has an order of 3 or higher.

5. The electronic device according to claim 1, characterized in that, It also includes a second circuit section containing the elastic wave element. The passband of the second circuit section includes a frequency that is 1.5 to 3 times the cutoff frequency of the high-pass filter.

6. The electronic device according to claim 1, characterized in that, The elastic wave element is disposed on the path connecting the input terminal and the output terminal.

7. The electronic device according to claim 6, characterized in that, The first body also includes a capacitor. The capacitor is connected in parallel with respect to the elastic wave element.

8. The electronic device according to claim 6, characterized in that, No elastic wave elements other than the elastic wave element are provided on the path connecting the input terminal and the output terminal.

9. The electronic device according to claim 1, characterized in that, The elastic wave element is positioned in the circuit structure between the path connecting the input terminal and the output terminal and the grounding element.

10. The electronic device according to claim 9, characterized in that, The first body also includes a capacitor. The capacitor is positioned between the elastic wave element and the grounding element in the circuit structure.

11. The electronic device according to claim 9, characterized in that, The first body also includes an LC parallel circuit in which an inductor and a capacitor are connected in parallel. The LC parallel circuit is positioned between the elastic wave element and the grounding element in the circuit structure.

12. The electronic device according to claim 9, characterized in that, Between the path connecting the input terminal and the output terminal and the grounding element, no other elastic wave element is provided in the circuit structure besides the elastic wave element.

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