FILTERING EQUIPMENT

Abstract

The invention relates to a filtering device. According to the proposed design of the invention, the filtering device comprises: a housing; a grounding element located inside the housing with its underside in contact with the housing; a wall element extending from the inner surface of the housing to contact the grounding element; several resonators located inside the housing, arranged in straight lines radially from the grounding element; an input port connected to one of the several resonators; and an output port connected to one of the several resonators, wherein the several resonators are arranged in such a way that they are spaced apart from each other, and one face of one or more of the several resonators is connected to the grounding element.

Description

filter device

[0001] The present disclosure relates to a filter device.

[0002] The material described in this section merely provides background information for the present disclosure and does not constitute prior art.

[0003] A filter is a device that utilizes frequency characteristics to block signals in unwanted frequency bands and allow only signals in the desired band to pass. Filters include high-pass filters (HPFs), band-pass filters (BPFs), and low-pass filters (LPFs).

[0004] A high-pass filter (HPF) passes high-frequency signals and blocks low-frequency ones. A band-pass filter (BPF) passes signals within a specific frequency bandwidth and blocks all other signals. A low-pass filter (LPF) passes low-frequency signals and blocks high-frequency ones.

[0005] The frequency response graph changes its waveform depending on the frequency signals that the filter passes and blocks. The passband refers to the range of frequencies that the filter passes. The stopband refers to the range of frequencies that the filter blocks. Frequency response is a key factor in determining the characteristics of a filter.

[0006] Achieving desired frequency characteristics is not easy. To achieve the desired frequency characteristics, the filter structure becomes more complex and the process can increase, leading to higher manufacturing costs. For example, notches can be created to achieve the desired frequency characteristics. A notch refers to a section in the frequency response graph where the amplitude decreases abruptly. While forming a notch improves attenuation performance, it may require the installation of additional structures.

[0007] Accordingly, the present disclosure is intended to solve these problems, and its main purpose is to provide a filter device capable of generating a notch on a frequency characteristic graph without installing an additional structure.

[0008] In addition, the present disclosure has a main purpose of providing a filter device in which cross-coupling occurs between non-adjacent resonators.

[0009] In addition, the main purpose of the present disclosure is to provide a filter device that can easily form a notch of a desired frequency by arranging resonators in an interdigital form.

[0010] According to one embodiment of the present disclosure for achieving the above object, a filter device is provided, comprising: a housing; a grounding member disposed inside the housing and having one side in contact with the housing; a wall member in contact with an inner surface of the housing; a first ring member having an inner circumferential surface in contact with the grounding member; a second ring member having an outer circumferential surface in contact with the housing; a plurality of resonators arranged on a straight line extending radially from a center of the housing so as to be disposed between the first ring member and the second ring member; an input port connected to one of the plurality of resonators; and an output port connected to another of the plurality of resonators, wherein the plurality of resonators are disposed to be spaced apart from each other, and at least one of the plurality of resonators has one side in contact with the first ring member.

[0011] As described above, according to this embodiment, the filter device has the effect of generating a notch on the frequency characteristic graph without installing an additional structure.

[0012] Additionally, the present disclosure has the effect of allowing cross-coupling between non-adjacent resonators to occur.

[0013] In addition, the present disclosure has the effect of easily forming a notch of a desired frequency by arranging the resonator in an interdigital form.

[0014] FIG. 1 is an exploded perspective view of a filter device according to a first embodiment of the present disclosure.

[0015] Fig. 2 is a plan view of a filter device according to the first embodiment of the present disclosure.

[0016] Fig. 3 is a cross-sectional view of a filter device according to the first embodiment of the present disclosure.

[0017] Figure 4 is a frequency characteristic graph according to the first embodiment of the present disclosure.

[0018] Fig. 5 is an exploded perspective view of a filter device according to a second embodiment of the present disclosure.

[0019] Fig. 6 is a plan view of a filter device according to a second embodiment of the present disclosure.

[0020] Figure 7 is a frequency characteristic graph according to the second embodiment of the present disclosure.

[0021] Fig. 8 is an exploded perspective view of a filter device according to a third embodiment of the present disclosure.

[0022] Fig. 9 is a plan view of a filter device according to a third embodiment of the present disclosure.

[0023] Fig. 10 is a frequency characteristic graph according to the third embodiment of the present disclosure.

[0024] Fig. 11 is an exploded perspective view of a filter device according to the fourth embodiment of the present disclosure.

[0025] Fig. 12 is a plan view of a filter device according to the fourth embodiment of the present disclosure.

[0026] Fig. 13 is a frequency characteristic graph according to the fourth embodiment of the present disclosure.

[0027] Fig. 14 is an exploded perspective view of a filter device according to the fifth embodiment of the present disclosure.

[0028] Fig. 15 is a plan view of a filter device according to the fifth embodiment of the present disclosure.

[0029] Fig. 16 is a frequency characteristic graph according to the fifth embodiment of the present disclosure.

[0030] Hereinafter, some embodiments of the present disclosure will be described in detail using exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components are given the same reference numerals, even if they appear in different drawings. Furthermore, when describing the present disclosure, detailed descriptions of related known structures or functions will be omitted if they are deemed to obscure the gist of the present disclosure.

[0031] In describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms.

[0032] When a component is described as being 'connected', 'coupled' or 'connected' to another component, it should be understood that the component may be directly connected or connected to that other component, but that another component may also be 'connected', 'coupled' or 'connected' between the components.

[0033] Throughout the specification, when a part is said to 'include' or 'have' a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0034] Terms such as ‘unit’, ‘module’, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

[0035] Unless stated otherwise, the description of any one embodiment is intended to be applicable to other embodiments.

[0036] The following description of the invention, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

[0037] FIGS. 1 to 4 are diagrams showing a filter device and frequency characteristic graph according to the first embodiment of the present disclosure.

[0038] FIGS. 5 to 7 are diagrams showing a filter device and frequency characteristic graph according to a second embodiment of the present disclosure.

[0039] FIGS. 8 to 10 are diagrams showing a filter device and frequency characteristic graph according to a third embodiment of the present disclosure.

[0040] FIGS. 11 to 13 are diagrams showing a filter device and frequency characteristic graph according to the fourth embodiment of the present disclosure.

[0041] FIGS. 14 to 16 are diagrams showing a filter device and frequency characteristic graph according to the fifth embodiment of the present disclosure.

[0042] Hereinafter, features of filter devices (1 to 5) according to the present disclosure will be described based on the first embodiment (Figs. 1 to 4) and / or the second embodiment (Figs. 5 to 7). The description will refer to the drawing reference numerals of the first embodiment and / or the second embodiment for consistent portions. For example, for the sake of brevity of the specification, a plurality of resonators (108, 208, 308, 408, 508) according to various embodiments will be briefly described with reference to the drawing reference numeral 108 of the first embodiment and / or the drawing reference numeral 208 of the second embodiment. Features not included in the first embodiment and / or the second embodiment will be described with reference to the third to fifth embodiments or described later.

[0043] Referring to FIGS. 1 to 16, a filter apparatus (filter apparatus 1 to 5) according to the present disclosure includes all or part of a housing (housing 120), a ground member (ground member 100), a wall member (wall member 107), a plurality of resonators (resonators 108, 208), an input port (input port 111), an output port (output port 113), a first ring member (101), a second ring member (second ring member 20), and a penetration member (penetration member 550).

[0044] The housing (120) accommodates components therein. The housing (120) may include an upper case (121) and a lower case (122). The size and shape of the housing (120) are not limited by the disclosure of the drawing. The upper surface of the upper case (121) of the housing (120) may have a circular shape. The lower surface of the lower case (122) of the housing (120) may have a circular shape. The longitudinal cross-section of the housing (120) may have a circular shape. The longitudinal cross-section of the housing (120) may have a polygonal shape. The frequency characteristics of the filter devices (1 to 5) may vary depending on the shape of the housing (120), the size of the accommodation space inside the housing (120), etc. The size and shape of the housing (120) may be adjusted according to the required specifications.

[0045] The first ring member (101) can be in contact with the ground member (100). The shape of the first ring member (101) may be a circular ring. The shape of the first ring member (101) may be a polygonal ring, such as a square ring or a pentagonal ring.

[0046] The first ring member (101) can be fitted into the ground member (100). In this case, the inner surface of the first ring member (101) can be in contact with the outer surface of the ground member (100).

[0047] The first ring member (101) can be in contact with the resonator (108). The resonator (108) can be formed by extending from the first ring member (101). The resonator (108) in contact with the first ring member (101) does not contact the second ring member (20).

[0048] The second ring member (20) can be in contact with the housing (120). The shape of the second ring member (20) may be a circular ring. The shape of the second ring member (20) may be a polygonal ring, such as a square ring or a pentagonal ring.

[0049] The second ring member (20) can be fitted into the housing (120). In this case, the outer surface of the second ring member (20) can be in contact with the inner surface of the housing (120).

[0050] The second ring member (20) can be in contact with the resonator (208). The resonator (208) can be formed by extending from the second ring member (20). The resonator (208) in contact with the second ring member (20) does not contact the first ring member (201).

[0051] The first ring member (101, 201) and / or the second ring member (20) may be formed integrally with one or more of the plurality of resonators (108, 208).

[0052] A second ring member (20) may be in contact with the inner surface of the housing (120). A cross-section perpendicular to the longitudinal direction of the inner surface of the housing (120) may be a polygon. The inner surface of the housing (120) where the second ring member (20) is in contact is not a plane with a curvature of 0. When a resonator (208) is formed by extending from the second ring member (20), cross coupling, which will be described later, may occur. Since the arrangement directions of the plurality of resonators (108, 208) formed by extending from the second ring member (20) are not parallel to each other, cross coupling may occur. That is, the filter devices (1 to 5) according to the present disclosure do not require additional structures to be installed on the plurality of resonators (108, 208) in order to generate cross coupling.

[0053] The grounding member (100) is placed inside the housing (120). The grounding member (100) may be placed at the center of the housing (120). The grounding member (100) and the housing (120) may be formed integrally with each other.

[0054] The shape of the longitudinal cross-section of the grounding member (100) may be a circle. The shape of the longitudinal cross-section of the grounding member (100) may be a polygon. The size and shape of the grounding member (100) are not limited by the disclosure of the drawing. The first ring member (101) may be in contact with a plurality of resonators (108, 208). The outer surface of the grounding member (100) is not a plane with a curvature of 0. When the resonator (108) is formed by extending from the first ring member (101), cross coupling, which will be described later, may occur. Since the arrangement directions of the plurality of resonators (108, 208) formed by extending from the first ring member (101) are not parallel to each other, cross coupling may occur. That is, no additional structure needs to be installed in the plurality of resonators (108, 208) to generate cross coupling.

[0055] The grounding member (100) can be in contact with the wall member (107). A portion of the wall member (107) can be inserted into the grounding member (100).

[0056] According to one embodiment, the grounding member (100) may be in contact with one side of the housing (120). The other side of the grounding member (100) may not be in contact with the housing (120). Specifically, the lower surface (103) of the grounding member (100) may be in contact with the lower case (122) of the housing (120), and the upper surface of the grounding member (100) may not be in contact with the housing (120). In this case, a void is formed between the housing (120) and the upper surface of the grounding member (100), which may cause cross coupling. Cross coupling refers to a phenomenon in which electrical connection occurs between non-adjacent resonators (108). For example, this is a case in which a first resonator (108A) and a third resonator (108C) that are not adjacent to each other are electrically connected. Various shapes of notches (n) may be generated due to cross coupling. The shape of the notch (n) that may be generated by cross-coupling is not limited to the shape disclosed in the drawing. The notch (n) refers to a portion where the waveform of the frequency characteristic graph changes abruptly and decreases. The notch (n) can be utilized to obtain desired frequency characteristics, such as improved attenuation performance. For example, the notch (n) can be generated on the left and / or right based on the passband shown in the frequency characteristic graph.

[0057] In order to obtain frequency characteristics of desired conditions, the shape, size, position, number, etc. of the grounding member (100), housing (120), multiple resonators (108, 208), wall member (107), passage (315), penetrating member (550), first ring member (101), second ring member (20), etc. can be adjusted, and a notch can be generated.

[0058] The wall member (107) can be in contact with the inner surface of the housing (120). The wall member (107) can be in contact with the upper and lower surfaces of the housing (120). The wall member (107) can be formed to extend from the inner surface of the housing (120). The wall member (107) can be formed integrally with the housing (120). The wall member (107) can be in contact with the ground member (100). The wall member (107) can be in contact with the first ring member (101). The wall member (107) can be in contact with the second ring member (20). The wall member (107) can be placed between a resonator connected to the input port (111) and a resonator connected to the output port (113). For example, the wall member (107) may be placed between the first resonator (108A) and the fifth resonator (108E). The wall member (107) may be placed so as to be in contact with the upper case (121). The wall member (107) may be placed so as to be in contact with the lower surface of the housing (122). For example, the wall member (107) may be placed so as to be in contact with the lower case (122).

[0059] The wall member (107) can block electrical connections between multiple resonators (108, 208). For example, electrical connections are prevented by using a path (P1) penetrating the wall member (107). For example, the electrical connection between the first resonator (108A) and the fifth resonator (108E) arranged adjacent to each other can be blocked.

[0060] The frequency characteristics of the filter devices (1 to 5), the number of notches (n), the positions of the notches (n), etc. can be adjusted by adjusting the shape, size, position, number, etc. of the wall members (107). The shape, size, position, number, etc. of the wall members (107) are not limited by the disclosure of the drawing.

[0061] The wall member (107) may include a passage (315) to generate an electrical connection between the plurality of resonators (108, 208). The wall member (107) functions to block the electrical connection, but if the passage (315) is included, an electrical connection may occur between the plurality of resonators (108, 208). By adjusting the shape, size, position, number, etc. of the passage (315), the frequency characteristics of the filter devices (1 to 5), the position of the notch (n), the number of the notch (n), etc., may be adjusted. The shape, size, position, number, etc. of the passage (315) are not limited by the drawing. For example, the passage (315) may be formed smaller than the shape illustrated in the drawing. For example, unlike the drawing, the passage (315) may be circular, polygonal, etc.

[0062] The wall member (107) may include a groove (280) for the second ring member (20) to be seated therein. The size, shape, and position of the groove (280) are not limited by the drawing.

[0063] The wall member (107) may be in contact with the ground member (100), as shown in Fig. 1. The wall member (107) may not be in contact with the ground member (200), as shown in Fig. 5.

[0064] A plurality of resonators (108, 208) are arranged inside the housing (120). The shape, size, position, number, etc. of the resonators (108) can be adjusted to obtain desired notch and / or frequency characteristics. The plurality of resonators (108, 208) can be arranged spaced apart from each other. The plurality of resonators (108, 208) can be arranged between the first ring member (101) and the second ring member (20). The plurality of resonators (108, 208) can be arranged on a straight line extending radially from the center of the housing (120) so that the plurality of resonators (108, 208) are arranged between the first ring member (101) and the second ring member (20).

[0065] The plurality of resonators (108, 208) may be arranged so as not to be parallel to each other. The shape of the outer surface of the first ring member (101) may be formed so that the plurality of resonators (108, 208) are arranged so as not to be parallel to each other. The shape of the inner surface of the second ring member (20) may be formed so that the plurality of resonators (108, 208) are arranged so as not to be parallel to each other. When the plurality of resonators (108, 208) are arranged so as not to be parallel to each other, cross-coupling, which is a phenomenon in which non-adjacent resonators are electrically connected, may occur. The desired frequency characteristics can be obtained by adjusting the cross-coupling.

[0066] According to one embodiment, at least one of the plurality of resonators (108, 208) may be in contact with the first ring member (101). The resonator (108) in contact with the first ring member (101) may not be in contact with the second ring member (20).

[0067] According to one embodiment, at least one of the plurality of resonators (108, 208) may not be in contact with the first ring member (101). The resonator (108) that is not in contact with the first ring member (101) may be in contact with the second ring member (20).

[0068] At least one of the plurality of resonators (108, 208) may include a head portion (110). The head portion (110) may be formed on the body (109) of the resonator (108). By adjusting the shape, size, position, number, etc. of the head portion (110), the frequency characteristic graph of the filter devices (1 to 5), the position of the notch (n), the number of the notches (n), etc. may be changed.

[0069] According to one embodiment, among the plurality of resonators (108, 208), the resonator (108) in contact with the first ring member (101) may include a head portion (110) at an end adjacent to the second ring member (20). According to one embodiment, among the plurality of resonators (108, 208), the resonator in contact with the second ring member (20) may include a head portion (110) at an end adjacent to the first ring member (101). For example, among the resonators (208) of the second embodiment (FIGS. 5 and 6), the second resonator (208B) and the fourth resonator (208D) connected to the first ring member (201) include head portions (210B, 210D) at an end adjacent to the second ring member (20). For example, the first resonator (208A), the third resonator (208C), and the fifth resonator (208E), which are not connected to the first ring member (201), include head portions (210A, 210C, 210E) at the ends adjacent to the first ring member (201).

[0070] The shape, size, position, number, etc. of the plurality of resonators (108, 208) are not limited by the disclosure of the drawing. The size and / or shape of each of the plurality of resonators (108, 208) can be formed independently.

[0071] Unlike conventional resonators that are arranged vertically on a plane with a curvature of 0, the plurality of resonators (108, 208) according to the present disclosure are arranged to contact the first ring member (101) or to contact the second ring member (20). That is, the plurality of resonators (108, 208) according to the present disclosure are arranged not to be parallel to each other. Since they are not parallel to each other, cross-coupling may occur. Conventional resonators require additional structures to generate cross-coupling, but the plurality of resonators (108, 208) according to the present disclosure can generate cross-coupling without additional structures. That is, there is an effect of reducing cost.

[0072] The arrangement of all or part of the plurality of resonators (108, 208) may be an interdigital arrangement. The interdigital arrangement means that the resonators (108, 208) connected to the first ring member (101, 201) and the resonators (208) of the second ring member (20) are arranged alternately. For example, in the case of the second embodiment (Figs. 5 and 6), the first resonator (208A) connected to the second ring member (20), the second resonator (208B) connected to the first ring member (101), the third resonator (208C) connected to the second ring member (20), the fourth resonator (208D) connected to the first ring member (101), and the fifth resonator (208E) connected to the second ring member (20) are arranged alternately. As in the fifth embodiment (Figs. 14 and 15), only some of the plurality of resonators (508) may be arranged in an interdigital configuration. For example, the second resonator (508B), the third resonator (508C), and the fourth resonator (508D) of the fifth embodiment are arranged in an interdigital configuration. When arranged in an interdigital configuration, a plurality of notches (n) can be easily formed. The desired frequency characteristics can be obtained by utilizing the interdigital configuration.

[0073] The input port (111) can be connected to any one of the plurality of resonators (108, 208). The output port (113) can be connected to any one of the plurality of resonators (108, 208).

[0074] According to one embodiment, the resonator (108) connected to the input port (111) and the resonator (108) connected to the output port (113) may be arranged adjacent to each other. According to one embodiment, the wall member (107) may be arranged between the resonator (108) connected to the input port (111) and the resonator (108) connected to the output port (113).

[0075] The penetrating member (550) can penetrate the wall member (107, 507). The penetrating member (550) can be fixed by the wall member (107, 507). There can be one or more penetrating members (550) penetrating the wall member (107, 507). The wall member (107, 507) serves to block electrical connection, but electrical connection can occur between a plurality of resonators (508) by the penetrating member (550).

[0076] The shape, size, position, number, etc. of the penetrating member (550) are not limited by the disclosure of the drawing. The penetrating member (550) disclosed in FIG. 14 is arranged closer to the upper surface of the housing (120) than the lower surface of the housing (120), but is not limited thereto. The penetrating member (550) may be arranged closer to the lower surface of the housing (120). The penetrating member (550) may be arranged on the same plane as the plurality of resonators (108, 208). By adjusting the shape, size, position, number, etc. of the penetrating member (550), the frequency characteristics, the position of the notch (n), the number of the notch (n), etc. may be adjusted.

[0077] The first embodiment is described. This section focuses on details not previously explained. Any overlap with previously explained details is omitted or briefly explained.

[0078] Referring to FIGS. 1 to 4, according to the first embodiment of the present disclosure, all of the plurality of resonators (108) may be connected to the first ring member (101). The filter device (1) according to the first embodiment may include the first resonator (108A) to the fifth resonator (108E). The first resonator (108A) may be connected to the input port (111), and the fifth resonator (108E) may be connected to the output port (113).

[0079] The filter device (1) according to the first embodiment may exhibit cross-coupling. For example, the first resonator (108A) may be electrically connected to non-adjacent third to fifth resonators (108C) to (108E). A notch (n1) may be generated due to the cross-coupling. The notch (n1) may be generated to the right of the passband of the frequency characteristic graph.

[0080] The first resonator (108A) to the fifth resonator (108E) are arranged so as not to be parallel to each other. This is because the shape of the outer surface of the first ring member (101) is not a plane with a curvature of 0. The head portions (110) of the first resonator (108A) to the fifth resonator (108E) are arranged so as to all face different directions. Since the first resonator (108A) to the fifth resonator (108E) are not parallel to each other, cross-coupling may occur.

[0081] The upper surface of the grounding member (100) and the upper surface of the housing (120) do not contact each other (Fig. 3). That is, an empty space is formed between the upper surface of the grounding member (100) and the upper surface of the housing (120). Cross-coupling may occur between the plurality of resonators (108) due to the empty space.

[0082] The frequency characteristics may change depending on the angle between adjacent resonators (108). For example, when the angle (A1, FIG. 2) between adjacent first resonators (108A) and second resonators (108B) changes, the waveform of the frequency characteristic graph, the position of the notch (n1), the number of notches (n1), the amplitude reduction, etc. may change. The angles between a plurality of resonators (108) may be formed independently of each other. For example, the angle (A1) between the first resonator (108A) and the second resonator (108B) and the angle between the second resonator (108B) and the third resonator (108C) may be the same as or different from each other.

[0083] The frequency characteristics may change depending on the distance between the inner surface of the head portion (110) and the housing (120). For example, when the distance (d1) between the inner surface of the first head portion (110A) and the housing (120) of FIG. 2 changes, the waveform of the frequency characteristic graph, the position of the notch (n1), the number of notches (n1), the amplitude reduction amount, etc. may change. The distance between the inner surface of the head portion (110) and the housing (120) may be formed independently of each other. For example, the distance (d1) between the inner surface of the first head portion (110A) and the housing (120) and the distance between the inner surface of the second head portion (110B) and the housing (120) may be the same as or different from each other.

[0084] A second embodiment is described. This section focuses on details not previously explained. Any overlap with previously explained details will be omitted or briefly explained.

[0085] Referring to FIGS. 5 to 7, the filter device (2) according to the second embodiment of the present disclosure may include a first resonator (208A) to a fifth resonator (208E). The first resonator (208A) to the fifth resonator (208E) may be sequentially arranged in a counterclockwise direction with the first ring member (201) and / or the ground member (200) as the center. The first resonator (208A) may be connected to an input port (211), and the fifth resonator (208E) may be connected to an output port (213).

[0086] According to the second embodiment of the present disclosure, the first resonator (208A), the third resonator (208C), and the fifth resonator (208E) may be in contact with the second ring member (20), and the second resonator (208B) and the fourth resonator (208D) may be in contact with the first ring member (201). According to the second embodiment, the notch (n2) may be generated on the right side based on the passband shown in the frequency characteristic graph.

[0087] According to the second embodiment, the arrangement of the plurality of resonators (208) may be interdigital. Specifically, a first resonator (208A) in contact with the second ring member (20), a second resonator (208B) in contact with the first ring member (201), a third resonator (208C) in contact with the second ring member (20), a fourth resonator (208D) in contact with the first ring member (201), and a fifth resonator (208E) in contact with the second ring member (20) may be arranged in sequence. When arranged in an interdigital manner, a plurality of notches (n) can be easily formed. Desired frequency characteristics can be obtained by utilizing the interdigital arrangement.

[0088] The frequency characteristics can change depending on the angle between adjacent resonators (208) and the distance between the head portion (210) and the second ring member (20). For example, when the angle (A2) of the second embodiment (Fig. 6) changes, the frequency characteristics can change. For example, when the distance (d3) between the second head portion (210B) and the second ring member (20) of Fig. 6 changes, the waveform of the frequency characteristic graph, the position of the notch (n1), the number of the notches (n1), the amplitude reduction amount, etc. can change. The distance between the head portion (210) and the second ring member (20) can be formed independently of each other. For example, the distance (d3) between the second head portion (210B) and the second ring member (20) and the distance between the fourth head portion (110D) and the second ring member (20) can be the same as or different from each other.

[0089] The frequency characteristics may change depending on the distance between the first ring member (201) and the head member (210). For example, when the distance (d2) between the third head member (210C) and the first ring member (201) of FIG. 6 changes, the waveform of the frequency characteristic graph, the position of the notch (n2), the number of notches (n2), the amplitude reduction amount, etc. may change.

[0090] The frequency characteristics may vary depending on the size and shape of the head portion (210). Referring to FIG. 6, the third head portion (210C) has a smaller size than the other head portions (210). The third head portion (210C) has a different shape compared to the other head portions (210). For example, the third head portion (210C) has a different shape from the adjacent fourth head portion (210D). As in the third embodiment, the desired frequency characteristics may be obtained by adjusting the size, shape, etc. of each head portion (210).

[0091] Each resonator of the plurality of resonators (208) may be formed integrally with the first ring member (201) or integrally with the second ring member (20). For example, the first resonator (208A) of FIG. 5 may be formed integrally with the second ring member (20). For example, the second resonator (208B) of FIG. 5 may be formed integrally with the first ring member (201).

[0092] The third embodiment is described. This section focuses on details not previously explained. Any overlap with previously explained details will be omitted or briefly explained.

[0093] Referring to FIGS. 8 to 10, a filter device (3) according to a third embodiment of the present disclosure may include a first resonator (308A) to a fifth resonator (308E). The first resonator (308A) to the fifth resonator (308E) may be sequentially arranged in a counterclockwise direction with the first ring member (301) and / or the ground member (300) as the center. The first resonator (308A) may be connected to an input port (311), and the fifth resonator (308E) may be connected to an output port (313).

[0094] According to the third embodiment, the filter device (3) may include a passage (315). The passage (315) enables electrical connection between a plurality of resonators (308). Depending on the passage (315), the waveform of the frequency characteristic graph, the position of the notch (n3), the number of the notches (n3), the amplitude reduction amount, etc. may change. The biggest difference between the third embodiment (Figs. 8 to 10) and the second embodiment (Figs. 5 to 7) is whether the passage (315) is included. Depending on the presence or absence of the passage (315), the third embodiment and the second embodiment have different frequency characteristics (Figs. 7 and 10). Specifically, in the case of the third embodiment, notches (n3) are generated on the left and right sides of the passband, and in the case of the second embodiment, notches (n2) are generated on the right side of the passband.

[0095] The fourth embodiment is described. This section focuses on details not previously explained. Any overlap with previously explained details will be omitted or briefly explained.

[0096] Referring to FIGS. 11 to 13, a filter device (4) according to a fourth embodiment of the present disclosure may include a first resonator (408A) to a fifth resonator (408E). The first resonator (408A) to the fifth resonator (408E) may be sequentially arranged in a counterclockwise direction with the first ring member (401) and / or the ground member (400) as the center. The first resonator (408A) may be connected to an input port (411), and the fifth resonator (408E) may be connected to an output port (413). According to the fourth embodiment, the first resonator (408A), the third resonator (408C), and the fifth resonator (408E) may be connected to the first ring member (401), and the second resonator (408B) and the fourth resonator (408D) may be connected to the second ring member (40). According to the fourth embodiment, the notch (n4) may occur on the right side based on the passband shown in the frequency characteristic graph.

[0097] According to the fourth embodiment, the arrangement of the plurality of resonators (408) may be interdigital. Specifically, a first resonator (408A) connected to the first ring member (401), a second resonator (408B) connected to the second ring member (400), a third resonator (408C) connected to the first ring member (401), a fourth resonator (408D) connected to the second ring member (400), and a fifth resonator (408E) connected to the first ring member (401) may be arranged in sequence. When arranged in an interdigital manner, a plurality of notches (n4) can be easily formed. Desired frequency characteristics can be obtained by utilizing the interdigital arrangement.

[0098] The fifth embodiment is described. This section focuses on details not previously explained. Any overlap with previously explained details will be omitted or briefly explained.

[0099] Referring to FIGS. 14 to 16, a filter device (5) according to a fifth embodiment of the present disclosure may include a first resonator (508A) to a fifth resonator (508E). The first resonator (508A) to the fifth resonator (508E) may be sequentially arranged in a counterclockwise direction with the first ring member (501) and / or the ground member (500) as the center. The first resonator (508A) may be connected to an input port (511), and the fifth resonator (508E) may be connected to an output port (513).

[0100] According to the fifth embodiment, the first resonator (508A), the second resonator (508B), the fourth resonator (508D), and the fifth resonator (508E) may be connected to the first ring member (501). The third resonator (508C) may be connected to the second ring member (50). The wall member (507) may be positioned between the first resonator (508A) and the fifth resonator (508E).

[0101] According to the fifth embodiment, a penetrating member (550) penetrating the wall member (507) may be included. The shape of the penetrating member (550) is not limited by the disclosure of the drawing. For example, the penetrating member (550) may have a cylindrical shape. The penetrating member (550) may have a spherical shape.

[0102] The wall member (507) blocks electrical connection, but if the wall member (507) includes a penetrating member (550), an electrical connection may occur. For example, the first resonator (508A) and the fifth resonator (508E) may be electrically connected by the penetrating member (550).

[0103] According to the fifth embodiment, the notch (n5) may occur on the right side based on the passband shown in the frequency characteristic graph.

[0104] According to the fifth embodiment, it is also possible to arrange only some of the resonators (508) in an interdigital form. For example, the second resonator (508B), the third resonator (508C), and the fourth resonator (508D) of the fifth embodiment are arranged in an interdigital form.

[0105] According to another embodiment, the filter device (1 to 5) according to the present disclosure may not include the first ring member (101) and / or the second ring member (20). For example, when the first ring member (101) is not included, the plurality of resonators (108, 208) may all be connected to the second ring member (20).

[0106] Another embodiment of the present disclosure will be described. The filter devices (1 to 5) of the present invention can be configured in the form of a micro strip line or strip line using a dielectric substrate. Here, the dielectric substrate can be a printed circuit board (PCB). In this case, the plurality of resonators (108, 208) can be configured to be arranged between dielectric substrates formed in multiple layers. In this way, the configuration and / or shape of the filter devices (1 to 5) of the present invention is not limited by the disclosure of the drawings. The plurality of resonators (108, 208) can be arranged between various components, and even in this case, since the plurality of resonators (108, 208) can have a non-parallel arrangement structure, cross-coupling can occur between the plurality of non-adjacent resonators (108, 208).

[0107] The above description is merely an example of the technical idea of ​​the present embodiment, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of ​​the present embodiment, but rather to explain it, and the scope of the technical idea of ​​the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of the present embodiment.

[0108]

[0109] [Explanation of symbols]

[0110] 20: Second ring member

[0111] 100: Grounding member

[0112] 101: First ring member

[0113] 103: The lower surface of the grounding member

[0114] 107: Wall member

[0115] 108: Resonator of Revenge

[0116] 109: Body

[0117] 110: Head

[0118] 111: Input port

[0119] 113: Output port

[0120] 120: Housing

[0121] 121: Upper case

[0122] 122: Lower case

[0123] 280: Home

[0124] 315: Passage

[0125] 550: Penetrating member

[0126]

[0127] [CROSS-REFERENCE TO RELATED APPLICATION]

[0128] This patent application claims priority to Korean Patent Application No. 10-2023-0107242, filed August 16, 2023, which is incorporated herein by reference in its entirety.

Claims

1. Housing; A grounding member disposed inside the housing and having one side in contact with the housing; A wall member in contact with the inner surface of the above housing; A first ring member whose inner surface is in contact with the above-mentioned grounding member; A second ring member having an outer surface in contact with the housing; A plurality of resonators arranged on a straight line extending radially from the center of the housing so as to be arranged between the first ring member and the second ring member; an input port connected to any one of the above plurality of resonators; and Including an output port connected to another one of the above plurality of resonators, The above plurality of resonators are arranged spaced apart from each other, A filter device, wherein at least one of the plurality of resonators has one side in contact with the first ring member.

2. In paragraph 1, A filter device, wherein at least one of the plurality of resonators is electrically connected to a non-adjacent resonator.

3. In paragraph 1, The above grounding member is a filter device, the other side of which does not contact the housing.

4. In paragraph 1, A filter device, wherein each resonator of the plurality of resonators includes a head portion for adjusting frequency characteristics.

5. In paragraph 1, A filter device, wherein among the plurality of resonators, the resonator in contact with the first ring member does not contact the second ring member.

6. In paragraph 5, A filter device, wherein the resonator among the plurality of resonators in contact with the first ring member includes a head portion on the other side.

7. In paragraph 1, At least one of the above plurality of resonators is not in contact with the first ring member, A filter device, wherein among the plurality of resonators, a resonator that is not in contact with the first ring member has one side in contact with the second ring member.

8. In paragraph 7, A filter device, wherein the resonator among the plurality of resonators in contact with the second ring member includes a head portion on the other side.

9. In paragraph 1, A filter device in which the sizes and shapes of each of the plurality of resonators are formed independently.

10. In paragraph 1, A filter device, wherein the wall member includes a passage penetrating the wall member to create an electrical connection between the plurality of resonators.

11. In paragraph 1, A filter device further comprising one or more penetrating members penetrating the wall member.

12. In paragraph 1, A filter device in which a resonator connected to the input port and a resonator connected to the output port are arranged adjacent to each other.

13. In paragraph 12, The above wall member is a filter device arranged between a resonator connected to the input port and a resonator connected to the output port.

14. In paragraph 1, A filter device, wherein a cross-section of the grounding member, which is perpendicular to the longitudinal direction of the grounding member, has a polygonal shape.

15. In paragraph 1, A filter device in which the plurality of resonators are arranged alternately, the resonators in contact with the first ring member and the resonators in contact with the second ring member.

16. In paragraph 1, The above plurality of resonators include first to fifth resonators arranged in sequence in a counterclockwise direction centered on the first ring member, The above first resonator is connected to the input port, The above fifth resonator is connected to the output port, The above first resonator, the above third resonator and the above fifth resonator are in contact with the above second ring member, The second resonator and the fourth resonator are a filter device in contact with the first ring member.

17. In paragraph 16, The above wall member is located between the first resonator and the fifth resonator, A filter device, wherein the wall member includes a passage penetrating the wall member to create an electrical connection between the plurality of resonators.

18. In paragraph 1, The above plurality of resonators include first to fifth resonators arranged in sequence in a counterclockwise direction centered on the grounding member, The above first resonator is connected to the input port, The above fifth resonator is connected to the output port, The above first resonator, the above third resonator and the above fifth resonator are in contact with the above first ring member, The second resonator and the fourth resonator are a filter device in contact with the second ring member.

19. In paragraph 1, Further comprising at least one penetrating member penetrating the above wall member, The above plurality of resonators include first to fifth resonators arranged in sequence in a counterclockwise direction centered on the grounding member, The above first resonator is connected to the input port, The above fifth resonator is connected to the output port, The above first resonator, the above second resonator, the above fourth resonator and the above fifth resonator are in contact with the above first ring member, The above third resonator is in contact with the second ring member, The above wall member is a filter device located between the first resonator and the fifth resonator.

20. Housing; A grounding member disposed inside the housing and having one side in contact with the housing; A wall member in contact with the inner surface of the above housing; A first ring member whose inner surface is in contact with the above-mentioned grounding member; A plurality of resonators extending from the first ring member; an input port connected to any one of the above plurality of resonators; and Including an output port connected to another one of the above plurality of resonators, A filter device in which the above plurality of resonators are arranged spaced apart from each other.

21. Housing; A grounding member disposed inside the housing and having one side in contact with the housing; A wall member in contact with the inner surface of the above housing; A second ring member having an outer surface in contact with the housing; A plurality of resonators extending from the second ring member; an input port connected to any one of the above plurality of resonators; and Including an output port connected to another one of the above plurality of resonators, A filter device in which the above plurality of resonators are arranged spaced apart from each other.

22. A filter device according to paragraph 1, which is configured to be implemented in the form of a microstrip line or strip line, including at least one dielectric substrate.

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