FILTER STRUCTURE

Abstract

The invention relates to a filter construction. According to the design of the invention, the filter construction comprises: a housing; a grounding element located inside the housing and having one face in contact with the housing; a wall element extending from the inner surface of the housing to contact the grounding element; resonators located inside the housing and arranged on straight lines extending radially from the grounding element; an input port connected to one of the resonators; and an output port connected to another resonator, wherein the resonators are arranged far apart, and one face of at least one of the resonators is connected to the grounding element.

Description

Filter Structure {FILTER STRUCTURE}

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

[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 unwanted signals and allow only desired signals 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 certain 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 structure 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 structure in which cross-coupling occurs between non-adjacent resonators.

[0009] In addition, the main purpose of the present disclosure is to provide a filter structure 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 these objects, a filter structure is provided, comprising: a housing; a grounding member disposed inside the housing and having one side in contact with the housing; a wall member extending from an inner surface of the housing and in contact with the grounding member; a plurality of resonators disposed inside the housing and arranged on a straight line extending radially from the grounding 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 spaced apart from each other, and at least one of the plurality of resonators has one side connected to the grounding member.

[0011] As described above, according to this embodiment, the filter structure 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 structure according to a first embodiment of the present disclosure.

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

[0016] FIG. 3 is a cross-sectional view of a filter structure 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 structure according to a second embodiment of the present disclosure.

[0019] FIG. 6 is a plan view of a filter structure 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] Figure 8 is an exploded perspective view of a filter structure according to a third embodiment of the present disclosure.

[0022] FIG. 9 is a plan view of a filter structure 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 structure according to a fourth embodiment of the present disclosure.

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

[0028] Fig. 15 is a plan view of a filter structure 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] The terms ‘unit’, ‘module’, etc., used 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 explain 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 structure and frequency characteristic graph according to a first embodiment of the present disclosure.

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

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

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

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

[0042] Hereinafter, features of filter structures (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 be based on 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, the filter structure (filter structure 1 to 5) according to the present disclosure includes all or part of a housing (housing 120), a ground member (ground member 101), 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), 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 structures (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 inner surface of the housing (120) can be contacted by resonators (108, 208). In this case, the resonators (108, 208) are grounded to the housing (120). When m is a natural number greater than or equal to 3, it is assumed that m resonators (108, 208) are in contact with the housing (120). In order for the m resonators (108, 208) to easily contact 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 an m-angle. As described above, since the inner surface of the housing (120) where the resonators (108, 208) are arranged is not a plane with a curvature of 0, when the resonators (108, 208) are arranged along the inner surface of the housing (120), cross coupling, which will be described later, may occur. Since the plurality of resonators (108, 208) arranged along the inner surface of the housing (120) are not parallel to each other, cross coupling may occur. That is, the filter structures (1 to 5) according to the present disclosure do not require additional structures to be installed on the plurality of resonators (108, 208) to generate cross coupling.

[0046] The grounding member (101) is placed inside the housing (120). The grounding member (101) may be placed at the center of the housing (120).

[0047] The shape of the longitudinal cross-section of the grounding member (101) may be a circle. The shape of the longitudinal cross-section of the grounding member (101) may be a polygon. m is a natural number greater than or equal to 3, and it is assumed that m resonators (108, 208) are in contact with the grounding member (101). In order for the m resonators (108, 208) to easily contact the grounding member (101), the cross-section perpendicular to the longitudinal direction of the grounding member (101) may be an m-gon. The size and shape of the grounding member (101) are not limited by the disclosure of the drawing. As previously discussed, since the outer surface of the grounding member (101) on which the resonators (108, 208) are arranged is not a plane with a curvature of 0, when the resonators (108, 208) are arranged along the outer surface of the grounding member (101), cross coupling, which will be described later, may occur. Since the plurality of resonators (108, 208) arranged along the outer surface of the grounding member (101) are not parallel to each other, cross coupling may occur. That is, in order to generate cross coupling, no additional structure needs to be installed on the plurality of resonators (108, 208).

[0048] The grounding member (101) can be in contact with the wall member (107). A portion of the wall member (107) can be inserted into the grounding member (101).

[0049] According to one embodiment, the grounding member (101) may be connected to at least one of a plurality of resonators (108, 208). The resonators (108, 208) connected to the grounding member (101) may not be in contact with the housing (120).

[0050] According to one embodiment, the grounding member (101) may be grounded by contacting one side of the housing (120). The other side of the grounding member (101) may not be in contact with the housing (120). Specifically, the lower surface (103) of the grounding member (101) is in contact with the lower case (122) of the housing (120), and the upper surface (102) of the grounding member (101) is not in contact with the housing (120). In this case, a void is formed between the housing (120) and the upper surface (102) of the grounding member (101), which may cause cross-coupling. Cross-coupling refers to a phenomenon in which electrical connection occurs between non-adjacent resonators (108, 208). 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 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 side based on the passband shown in the frequency characteristic graph.

[0051] In order to obtain frequency characteristics of desired conditions, the shape, size, position, number, etc. of the grounding member (101), housing (120), multiple resonators (108, 208), wall member (107), passage (315), penetrating member (550), etc. can be adjusted, and a notch can be generated.

[0052] The wall member (107) may be formed to extend from the inner surface of the housing (120). The wall member (107) may be in contact with the ground member (101). The wall member (107) may be positioned 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 positioned between the first resonator (108A) and the fifth resonator (108E). The wall member (107) may be positioned to contact the upper case (121). The wall member (107) may be positioned to contact the lower case (122).

[0053] The wall member (107) can block electrical connections between multiple resonators (108, 208). For example, electrical connections are prevented by utilizing 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.

[0054] The frequency characteristics of the filter structure (1 to 5), the number of notches (n), the position of the notches (n), etc. can be adjusted by adjusting the shape, size, position, number, etc. of the wall member (107). The shape, size, position, number, etc. of the wall member (107) are not limited by the disclosure of the drawing.

[0055] 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 structures (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.

[0056] A plurality of resonators (108, 208) are arranged inside a housing (120). The shape, size, position, number, etc. of the resonators (108, 208) 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 on a straight line extending radially from the grounding member (101).

[0057] 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 grounding 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 housing (120) 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 may occur. The desired frequency characteristics can be obtained by adjusting the cross coupling.

[0058] According to one embodiment, at least one of the plurality of resonators (108, 208) may be connected to the grounding member (101). The resonator (108) connected to the grounding member (101) may not be in contact with the inner surface of the housing (120).

[0059] In one embodiment, one or more of the plurality of resonators (108, 208) may not be connected to the grounding member (101). The resonators (108, 208) not connected to the grounding member (101) may be in contact with the inner surface of the housing (120).

[0060] At least one of the plurality of resonators (108, 208) may include a head portion (110). The head portion (110) may be formed on one side of the body (109) of each resonator (108, 208). By adjusting the shape, size, position, number, etc. of the head portion (110), the frequency characteristic graph of the filter structure (1 to 5), the position of the notch (n), the number of the notch (n), etc. may be changed.

[0061] According to one embodiment, among the plurality of resonators (108, 208), a resonator (108, 208) connected to the grounding member (101) may include a head portion (110) on one side adjacent to the inner surface of the housing (120). According to one embodiment, among the plurality of resonators (108, 208), a resonator not connected to the grounding member (101) may include a head portion (110) on one side adjacent to the grounding 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 grounding member (201) include a head portion (210B, 210D) on one side adjacent to the lower case (222). For example, the first resonator (208A), the third resonator (208C), and the fifth resonator (208E), which are not connected to the grounding member (201), include a head portion (210A, 210C, 210E) on one side adjacent to the grounding member (201).

[0062] 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.

[0063] Unlike conventional resonators that are arranged vertically on a plane, the plurality of resonators (108, 208) according to the present disclosure are arranged to contact the outer surface of the grounding member (101) or the inner surface of the housing (120). 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. While the conventional resonator (108) requires an additional structure to generate cross coupling, the plurality of resonators (108, 208) according to the present disclosure can generate cross coupling without a separate structure. That is, there is an effect of reducing cost.

[0064] 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 grounding member (101) and the resonators (108, 208) not connected to the grounding member (101) are arranged alternately. For example, in the case of the second embodiment (Figs. 5 and 6), the first resonator (208A) not connected to the grounding member (201), the second resonator (208B) connected to the grounding member (201), the third resonator (208C) not connected to the grounding member (201), the fourth resonator (208D) connected to the grounding member (201), and the fifth resonator (208E) not connected to the grounding member (201) are arranged alternately. As in the fifth embodiment (Figs. 14 and 15), only some of the resonators 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.

[0065] 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).

[0066] According to one embodiment, the resonator (108, 208) connected to the input port (111) and the resonator (108, 208) 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, 208) connected to the input port (111) and the resonator (108, 208) connected to the output port (113).

[0067] 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 (108, 208) by the penetrating member (550).

[0068] 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 at a position adjacent to the upper case (521), but is not limited thereto. The penetrating member (550) may be arranged close to the lower case (522). The penetrating member (550) may be arranged on the same plane as the plurality of resonators (508). 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.

[0069] The first embodiment is described. This section focuses on details not previously explained. Any overlap with previously explained details is omitted or briefly explained.

[0070] 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 grounding member (101). The filter structure (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).

[0071] The filter structure (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 on the right side of the passband of the frequency characteristic graph.

[0072] The first to fifth resonators (108A) to (108E) are arranged so as not to be parallel to each other. This is because the shape of the outer surface of the grounding member (101) is not a plane with a curvature of 0. The head portions (110) of the first to fifth resonators (108A) to (108E) are arranged so as to face different directions. Since the first to fifth resonators (108A) to (108E) are not parallel to each other, cross-coupling may occur.

[0073] The upper surface (102) of the grounding member (101) and the upper case (121) do not contact each other (Fig. 3). That is, an empty space is formed between the upper surface (102) of the grounding member (101) and the housing (120). Cross coupling may occur due to the empty space.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] Referring to FIGS. 5 to 7, the filter structure (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 ground member (201) 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).

[0078] According to the second embodiment of the present disclosure, the first resonator (208A), the third resonator (208C), and the fifth resonator (208E) may not be connected to the grounding member (201), and the second resonator (208B) and the fourth resonator (208D) may be connected to the grounding member (201). According to the second embodiment, the notch (n2) may occur on the right side based on the passband shown in the frequency characteristic graph.

[0079] According to the second embodiment, the arrangement of the plurality of resonators (208) may be in an interdigital form. Specifically, a first resonator (208A) not connected to the grounding member (201), a second resonator (208B) connected to the grounding member (201), a third resonator (208C) not connected to the grounding member (201), a fourth resonator (208D) connected to the grounding member (201), and a fifth resonator (208E) not connected to the grounding member (201) may be arranged in sequence. When arranged in an interdigital form, a plurality of notches (n) can be easily formed. Desired frequency characteristics can be obtained by utilizing the interdigital form of arrangement.

[0080] The frequency characteristics may change depending on the angle between adjacent resonators (208) and the distance between the head portion (210) and the inner surface of the housing. For example, the frequency characteristics may change when the angle A2 of the second embodiment (Fig. 6) changes or the distance d3 changes.

[0081] The frequency characteristics may change depending on the distance between the grounding member (201) and the head portion (210). For example, when the distance (d2) between the third head portion (210C) and the grounding 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.

[0082] 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 compared to 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).

[0083] 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.

[0084] Referring to FIGS. 8 to 10, a filter structure (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 ground member (301) 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).

[0085] According to the third embodiment, the filter structure (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.

[0086] 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.

[0087] Referring to FIGS. 11 to 13, a filter structure (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 grounding member (401) 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 grounding member (401), and the second resonator (408B) and the fourth resonator (408D) may not be connected to the grounding member (401). According to the fourth embodiment, the notch (n4) may occur on the right side based on the passband shown in the frequency characteristic graph.

[0088] According to the fourth embodiment, the arrangement of the plurality of resonators (408) may be interdigital. Specifically, a first resonator (408A) connected to the grounding member (401), a second resonator (408B) not connected to the grounding member (401), a third resonator (408C) connected to the grounding member (401), a fourth resonator (408D) not connected to the grounding member (401), and a fifth resonator (408E) connected to the grounding 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.

[0089] 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.

[0090] Referring to FIGS. 14 to 16, a filter structure (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 ground member (501) 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).

[0091] 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 grounding member (501). The third resonator (508C) may not be connected to the grounding member (501). The wall member (507) may be located between the first resonator (508A) and the fifth resonator (508E).

[0092] 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.

[0093] 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).

[0094] According to the fifth embodiment, the notch (n5) may occur on the right side based on the passband shown in the frequency characteristic graph.

[0095] 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.

[0096] Another embodiment of the present disclosure will be described. The filter structures (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 of multiple layers. In this way, the configuration and / or shape of the filter structures (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).

[0097] 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.

[0098]

[0099] [Explanation of symbols]

[0100] 101: Grounding member

[0101] 102: Top surface of grounding member

[0102] 103: The lower surface of the grounding member

[0103] 107: Wall member

[0104] 108: Revenge Resonator

[0105] 109: Body

[0106] 110: Head

[0107] 111: Input port

[0108] 113: Output port

[0109] 120: Housing

[0110] 121: Upper case

[0111] 122: Lower case

[0112] 315: Passage

[0113] 550: Penetrating member

[0114]

[0115] [CROSS-REFERENCE TO RELATED APPLICATION]

[0116] This patent application claims priority to Korean Patent Application No. 10-2023-0107244, 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 extending from the inner surface of the housing and contacting the ground member; A plurality of resonators arranged inside the housing and arranged in a straight line extending radially from the grounding member; an input port connected to any one of the 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 structure, wherein at least one of the plurality of resonators has one side connected to the grounding member.

2. In paragraph 1, A filter structure, 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 structure whose other side does not contact the housing.

4. In paragraph 1, A filter structure, wherein at least one of the plurality of resonators includes a head portion for adjusting frequency characteristics.

5. In paragraph 1, A filter structure in which, among the plurality of resonators, the resonator connected to the grounding member does not contact the inner surface of the housing.

6. In paragraph 5, A filter structure in which a resonator among the plurality of resonators connected to the ground member includes a head portion on the other side.

7. In paragraph 1, At least one of the above plurality of resonators is not connected to the grounding member, A filter structure in which, among the plurality of resonators, a resonator not connected to the grounding member has one side in contact with the inner surface of the housing.

8. In paragraph 7, A filter structure in which a resonator among the plurality of resonators not connected to the grounding member includes a head portion on the other side.

9. In paragraph 1, A filter structure in which each of the plurality of resonators is formed independently.

10. In paragraph 1, A filter structure in which the above wall member includes a passage for generating an electrical connection between the plurality of resonators.

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

12. In paragraph 1, A filter structure 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 structure disposed between a resonator connected to the input port and a resonator connected to the output port.

14. In paragraph 1, A filter structure, 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, The above plurality of resonators are a filter structure in which resonators connected to the grounding member and resonators not connected to the grounding member are arranged alternately.

16. In paragraph 1, The above plurality of resonators are all connected to the grounding member, a filter structure.

17. In paragraph 1, The above plurality of resonators include first to fifth resonators arranged in sequence in a counterclockwise direction with the grounding member as the center, The above first resonator is connected to the input port, The above fifth resonator is connected to the output port, The first resonator, the third resonator and the fifth resonator are not connected to the grounding member, The second resonator and the fourth resonator are a filter structure connected to the grounding member.

18. In paragraph 17, The above wall member is located between the first resonator and the fifth resonator, A filter structure in which the above wall member includes a passage for generating an electrical connection between the plurality of resonators.

19. In paragraph 1, The above plurality of resonators include first to fifth resonators arranged in sequence in a counterclockwise direction with the grounding member as the center, The above first resonator is connected to the input port, The above fifth resonator is connected to the output port, The first resonator, the third resonator and the fifth resonator are connected to the grounding member, The second resonator and the fourth resonator are a filter structure that is not connected to the grounding member.

20. 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 with the grounding member as the center, The above first resonator is connected to the input port, The above fifth resonator is connected to the output port, The first resonator, the second resonator, the fourth resonator and the fifth resonator are connected to the grounding member, The above third resonator is not connected to the grounding member, The above wall member is a filter structure located between the first resonator and the fifth resonator.

21. A filter structure 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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