filter structure

Abstract

This invention provides a filter structure that can generate a notch on the frequency response graph without installing any additional structures. [Solution] The filter structure includes a housing, a grounding member disposed inside the housing with one side in contact with the housing, a wall member extending from the inner surface of the housing and in contact with the grounding member, a plurality of resonators disposed 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 an output port connected to any other of the plurality of resonators, wherein the plurality of resonators are spaced apart from each other, and at least one of the plurality of resonators has one side connected to the grounding member.

Description

Technical Field

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

Background Art

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

[0003] A filter is a device that uses frequency characteristics to block unwanted signals and allow only desired signals to pass through. Filters include high-pass filters (HPF), band-pass filters (BPF), low-pass filters (LPF), etc.

[0004] A high-pass filter (HPF) is a filter that allows high-frequency signals to pass through and blocks low-frequency signals. A band-pass filter (BPF) is a filter that allows signals within a certain frequency bandwidth to pass through and blocks other signals. A low-pass filter (LPF) is a filter that allows low-frequency signals to pass through and blocks high-frequency signals.

[0005] The waveform of the frequency response graph changes according to the frequency signals passed by the filter and the frequency signals blocked by the filter. The passband means the range of frequencies passed by the filter. The stopband means the range of frequencies blocked by the filter. Frequency characteristics are an important factor in determining the characteristics of the filter.

[0006] Obtaining the desired frequency response is not easy. Achieving the desired frequency response can complicate the filter's structure, increasing the number of processes and potentially raising manufacturing costs. For example, a notch can be introduced to achieve the desired frequency response. A notch represents a section in the frequency response graph where the amplitude decreases sharply. While the formation of a notch improves attenuation performance, it may require the installation of additional structures. [Overview of the project] [Problems that the invention aims to solve]

[0007] Therefore, this disclosure aims to solve these problems and primarily aims to provide a filter structure that can generate a notch on the frequency response graph without installing any additional structures.

[0008] Furthermore, the primary objective of this disclosure is to provide a filter structure in which cross-coupling occurs between non-adjacent resonators.

[0009] Furthermore, the primary objective of this disclosure is to provide a filter structure in which resonators can be arranged in an interdigital configuration to easily form notches at desired frequencies. [Means for solving the problem]

[0010] According to one embodiment of the present disclosure to achieve this objective, a filter structure is provided that includes a 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 in contact with the grounding member, a plurality of resonators disposed 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 an output port connected to any other of the plurality of resonators, wherein the plurality of resonators are spaced apart from each other, and at least one of the plurality of resonators has one side connected to the grounding member. [Effects of the Invention]

[0011] As explained above, this embodiment has the effect of generating a notch on the frequency response graph without installing any additional structures.

[0012] Furthermore, this disclosure has the effect of enabling cross-coupling between non-adjacent resonators.

[0013] Furthermore, this disclosure has the effect of easily forming notches at desired frequencies by arranging the resonators in an interdigital configuration. [Brief explanation of the drawing]

[0014] [Figure 1] This is an exploded perspective view of a filter structure according to the first embodiment of the present disclosure. [Figure 2] This is a plan view of a filter structure according to the first embodiment of the present disclosure. [Figure 3] This is a cross-sectional view of a filter structure according to the first embodiment of the present disclosure. [Figure 4] This is a frequency response graph relating to the first embodiment of the present disclosure. [Figure 5] This is an exploded perspective view of a filter structure according to a second embodiment of the present disclosure. [Figure 6] This is a plan view of a filter structure according to a second embodiment of the present disclosure. [Figure 7] This is a frequency response graph relating to a second embodiment of the present disclosure. [Figure 8] This is an exploded perspective view of a filter structure according to a third embodiment of the present disclosure. [Figure 9] This is a plan view of a filter structure according to a third embodiment of the present disclosure. [Figure 10] This is a frequency response graph relating to a third embodiment of the present disclosure. [Figure 11] This is an exploded perspective view of a filter structure according to a fourth embodiment of the present disclosure. [Figure 12]It is a plan view of a filter structure according to a fourth embodiment of the present disclosure. [Figure 13] It is a frequency characteristic graph according to a fourth embodiment of the present disclosure. [Figure 14] It is an exploded perspective view of a filter structure according to a fifth embodiment of the present disclosure. [Figure 15] It is a plan view of a filter structure according to a fifth embodiment of the present disclosure. [Figure 16] It is a frequency characteristic graph according to a fifth embodiment of the present disclosure.

Mode for Carrying Out the Invention

[0015] Hereinafter, some embodiments of the present disclosure will be described in detail using exemplary drawings. When adding reference numerals to the components of each drawing, it should be noted that for the same components, as long as possible, they have the same reference numerals even if they are shown on other drawings. Further, when it is determined that a specific description of a related known configuration or function may obscure the gist of the present disclosure in explaining the present disclosure, the detailed description thereof will be omitted.

[0016] When explaining the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. Such terms are only for distinguishing the components from other components, and the essence, order, or sequence of the corresponding components is not limited by such terms.

[0017] When it is described that a certain component is "connected", "coupled", or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but other components may also be "connected", "coupled", or "connected" between the components.

[0018] Throughout the specification, when a certain part "includes" or "comprises" a certain component, this means that, unless there is a special contrary description, it does not exclude other components and may further include other components.

[0019] The terms "~part," "module," etc., used in this specification refer to a unit that processes at least one function or operation, which may be embodied in hardware, software, or a combination of hardware and software.

[0020] Unless otherwise stated, it should be made clear that the explanation for one embodiment may also apply to other embodiments.

[0021] The description of the invention disclosed below, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and not to show the only possible embodiments in which the invention may be carried out.

[0022] Figures 1 to 4 are diagrams illustrating a filter structure and frequency response graph according to the first embodiment of the present disclosure.

[0023] Figures 5 to 7 are diagrams illustrating a filter structure and frequency response graph according to a second embodiment of the present disclosure.

[0024] Figures 8 to 10 are diagrams illustrating a filter structure and frequency response graph according to a third embodiment of the present disclosure.

[0025] Figures 11 to 13 are diagrams illustrating a filter structure and frequency response graph according to a fourth embodiment of the present disclosure.

[0026] Figures 14 to 16 are diagrams illustrating a filter structure and frequency response graph according to a fifth embodiment of the present disclosure.

[0027] The features of the filter structures 1 to 5 according to this disclosure will be described below, based on the first embodiment (Figures 1 to 4) and / or the second embodiment (Figures 5 to 7). Where there is no inconsistency, the reference numerals in the drawings of the first embodiment and / or the second embodiment will be used as the basis for the description. For example, for the sake of brevity in this specification, the multiple resonators 108, 208, 308, 408, and 508 relating to various embodiments will be briefly described using reference numeral 108, which is the reference numeral in the drawings of the first embodiment, and / or reference numeral 208, which is the reference numeral in the drawings of the second embodiment. Features not included in the first embodiment and / or the second embodiment will be described or described later with reference to the third to fifth embodiments.

[0028] Referring to Figures 1 to 16, the filter structures 1 to 5 according to this disclosure include all or part of a housing 120, a ground member 101, a wall member 107, a plurality of resonators 108, 208, an input port 111, an output port 113, and a penetration member 550.

[0029] The housing 120 houses components inside. 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 in the drawings. The top surface of the upper case 121 of the housing 120 may be circular. The bottom surface of the lower case 122 of the housing 120 may be circular. The longitudinal cross-section of the housing 120 may be circular. The longitudinal cross-section of the housing 120 may be polygonal. The frequency characteristics of the filter structures 1 to 5 may change depending on the shape of the housing 120, the size of the housing space inside the housing 120, etc. The size and shape of the housing 120 can be adjusted to meet the required specifications.

[0030] The resonators 108 and 208 can be in contact with the inner surface of the housing 120. In this case, the resonators 108 and 208 are grounded to the housing 120. When m is a natural number greater than or equal to 3, we assume that m resonators 108 and 208 are in contact with the housing 120. The cross section perpendicular to the length direction of the inner surface of the housing 120 can be an m-sided polygon so that m resonators 108 and 208 can easily contact the inner surface of the housing 120. As seen above, the inner surface of the housing 120 on which the resonators 108 and 208 are arranged is not a plane with zero curvature, so when the resonators 108 and 208 are arranged along the inner surface of the housing 120, cross coupling, which will be described later, can occur. Since the multiple resonators 108 and 208 arranged along the inner surface of the housing 120 are not parallel to each other, cross coupling can occur. In other words, the filter structures 1 to 5 according to this disclosure do not require the installation of additional structures on the multiple resonators 108, 208 in order to generate cross-coupling.

[0031] The grounding member 101 is located inside the housing 120. The grounding member 101 may be located in the center of the housing 120.

[0032] The longitudinal cross-sectional shape of the grounding member 101 may be circular. The longitudinal cross-sectional shape of the grounding member 101 may be polygonal. m is a natural number greater than or equal to 3, and we assume that m resonators 108,208 are in contact with the grounding member 101. The cross-section perpendicular to the longitudinal direction of the grounding member 101 may be an m-sided polygon so that m resonators 108,208 can easily contact the grounding member 101. The size and shape of the grounding member 101 are not limited by the disclosure in the drawings. As seen above, the outer surface of the grounding member 101 on which the resonators 108,208 are arranged is not a plane with zero curvature, so 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 multiple 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, it is not necessary to install additional structures on the multiple resonators 108,208 in order to cause cross-coupling.

[0033] The grounding member 101 may come into contact with the wall member 107. A portion of the wall member 107 may be inserted into the grounding member 101.

[0034] According to one embodiment, the grounding member 101 can be connected to at least one of the multiple resonators 108, 208. The resonators 108, 208 connected to the grounding member 101 do not need to be in contact with the housing 120.

[0035] In one embodiment, the grounding member 101 can be grounded by contacting one side of the housing 120. The other side of the grounding member 101 does not need to 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, while the upper surface 102 of the grounding member 101 is not in contact with the housing 120. In this case, a gap is formed between the housing 120 and the upper surface 102 of the grounding member 101, and cross-coupling may occur. Cross-coupling refers to the phenomenon in which an electrical connection occurs between non-adjacent resonators 108, 208. For example, this occurs when a first resonator 108A and a third resonator 108C, which are not adjacent to each other, are electrically connected. Various forms of notch n can be generated by cross-coupling. The shape of the notch that can be generated by cross-coupling is not limited to the shape disclosed in the drawings. Notch n refers to the part of the frequency response graph where the waveform changes abruptly and decreases. Notch n can be used to obtain desired frequency characteristics, such as improving damping performance. For example, a notch n can be generated to the left and / or right of the passband shown in the frequency response graph.

[0036] To obtain the desired frequency characteristics, the shape, size, position, number, etc., of the grounding member 101, housing 120, multiple resonators 108, 208, wall member 107, passage 315, through member 550, etc., can be adjusted to generate notches.

[0037] The wall member 107 may be formed extending from the inner surface of the housing 120. The wall member 107 may be in contact with the grounding member 101. The wall member 107 may be positioned between the resonator connected to the input port 111 and the 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 in contact with the upper case 121. The wall member 107 may be positioned in contact with the lower case 122.

[0038] The wall member 107 can interrupt electrical connections between multiple resonators 108,208. For example, it can prevent electrical connections from occurring by utilizing a path P1 that penetrates the wall member 107. For example, it can interrupt electrical connections between the first resonator 108A and the fifth resonator 108E, which are located adjacent to each other.

[0039] The frequency characteristics of the filter structures 1 to 5, the number of notches n, the position of 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 in the drawings.

[0040] The wall member 107 may include passages 315 to generate electrical connections between multiple resonators 108,208. While the wall member 107 performs the role of blocking electrical connections, if it includes passages 315, electrical connections may be generated between the multiple resonators 108,208. The shape, size, position, number, etc. of the passages 315 can be adjusted to adjust the frequency characteristics of the filter structures 1 to 5, the position of notch n, the number of notch n, etc. The shape, size, position, number, etc. of the passages 315 are not limited by the drawings. For example, the passages 315 may be formed smaller than the shape shown in the drawings. For example, contrary to the drawings, the passages 315 may be circular.

[0041] Multiple resonators 108,208 are arranged inside the housing 120. The shape, size, position, number, etc., of the resonators 108,208 can be adjusted to obtain the desired notch and / or frequency characteristics. Multiple resonators 108,208 can be arranged spaced apart from each other. Multiple resonators 108,208 can be arranged on a straight line extending radially from the grounding member 101.

[0042] Multiple resonators 108,208 can be arranged so as not to be parallel to each other. The shape of the outer surface of the grounding member 101 can be formed so that the multiple resonators 108,208 are arranged so as not to be parallel to each other. The shape of the inner surface of the housing 120 can be formed so that the multiple resonators 108,208 are arranged so as not to be parallel to each other. When the multiple resonators 108,208 are arranged so as not to be parallel to each other, cross-coupling can occur. The cross-coupling can be adjusted to obtain the desired frequency characteristics.

[0043] According to one embodiment, at least one of the multiple resonators 108,208 can be connected to the grounding member 101. The resonator 108 connected to the grounding member 101 does not need to be in contact with the inner surface of the housing 120.

[0044] According to one embodiment, one or more of the multiple resonators 108, 208 do not need to be connected to the grounding member 101. The resonators 108, 208 that are not connected to the grounding member 101 may be in contact with the inner surface of the housing 120.

[0045] One or more of the multiple 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 portions 110, the frequency characteristic graphs of the filter structures 1 to 5, the position of notch n, the number of notch n, etc., can be changed.

[0046] According to one embodiment, among the multiple resonators 108, 208, the resonators 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 multiple resonators 108, 208, the resonators 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 (Figures 5 and 6), the second resonator 208B and the fourth resonator 208D connected to the grounding member 201 include head portions 210B and 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 head portions 210A, 210C, and 210E on one side adjacent to the grounding member 201.

[0047] The shape, size, position, number, etc., of the multiple resonators 108,208 are not limited by the disclosure in the drawings. The size and / or shape of each of the multiple resonators 108,208 can be formed independently.

[0048] Unlike conventional resonators arranged vertically on a plane, the multiple resonators 108, 208 according to this disclosure are arranged to be in contact with the outer surface of the grounding member 101 or in contact with the inner surface of the housing 120. In other words, the multiple resonators 108, 208 according to this disclosure are arranged so as not to be parallel to each other. Because they are not parallel to each other, cross-coupling can occur. Conventional resonators 108 require the installation of additional structures to generate cross-coupling, but in the case of the multiple resonators 108, 208 according to this disclosure, cross-coupling can be generated without any separate structures. In other words, there is a cost-saving effect.

[0049] All or part of the arrangement of the multiple resonators 108,208 can be in an interdigital configuration. An interdigital configuration means that resonators 108,208 connected to the grounding member 101 and resonators 108,208 not connected to the grounding member 101 are arranged alternately. For example, in the second embodiment (Figures 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 (Figures 14 and 15), it is also possible that only some of them are arranged in an interdigital configuration. For example, the second resonator 508B, the third resonator 508C, and the fourth resonator 508D in the fifth embodiment are arranged in an interdigital configuration. When arranged in an interdigital configuration, a number of notches n can be easily formed. Desired frequency characteristics can be obtained by utilizing the interdigital configuration.

[0050] Input port 111 can be connected to any one of the multiple resonators 108, 208. Output port 113 can be connected to any one of the multiple resonators 108, 208.

[0051] According to one embodiment, the resonators 108, 208 connected to the input port 111 and the resonators 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 placed between the resonators 108, 208 connected to the input port 111 and the resonators 108, 208 connected to the output port 113.

[0052] The penetrating member 550 can penetrate the wall members 107 and 507. The penetrating member 550 can be fixed by the wall members 107 and 507. There may be one or more penetrating members 550 penetrating the wall members 107 and 507. The wall members 107 and 507 perform the role of blocking electrical connections, but the penetrating member 550 may create electrical connections between multiple resonators 108 and 208.

[0053] The shape, size, position, number, etc. of the through members 550 are not limited by the drawings. The through members 550 disclosed in Figure 14 are positioned adjacent to the upper case 521, but are not limited to this. The through members 550 may be positioned closer to the lower case 522. The through members 550 may be positioned on the same plane as the multiple resonators 508. The frequency characteristics, the position of notch n, the number of notches n, etc. can be adjusted by adjusting the shape, size, position, number, etc. of the through members 550.

[0054] The first embodiment will be described. Content not covered above will be explained briefly. Content that overlaps with what has been explained above will be omitted or explained more briefly.

[0055] Referring to Figures 1 to 4, according to the first embodiment of this disclosure, all of the multiple resonators 108 may be connected to the grounding member 101. The filter structure 1 according to the first embodiment may include a first resonator 108A to a 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.

[0056] The filter structure 1 according to the first embodiment may experience cross-coupling. For example, the first resonator 108A may be electrically connected to a third resonator 108C through a fifth resonator 108E that are not adjacent. Cross-coupling may generate a notch n1. The notch n1 may occur to the right of the passband on the frequency response graph.

[0057] The first to fifth resonators 108A and 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 zero curvature. The head portions 110 of the first to fifth resonators 108A and 108E are all arranged to face different directions. Since the first to fifth resonators 108A and 108E are not parallel to each other, cross-coupling may occur.

[0058] The upper surface 102 of the grounding member 101 and the upper case 121 do not come into contact with each other (Figure 3). That is, a gap is formed between the upper surface 102 of the grounding member 101 and the housing 120. Cross coupling may occur due to this gap.

[0059] The frequency response can change depending on the angle between adjacent resonators 108. For example, if the angle A1 (Figure 2) between the adjacent first resonator 108A and the second resonator 108B changes, the waveform of the frequency response graph, the position of notch n1, the number of notches n1, the amplitude reduction, etc., may change. The angles between multiple resonators 108 can 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 can be the same or different from each other.

[0060] The frequency response can change depending on the distance between the head portion 110 and the inner surface of the housing 120. For example, if the distance d1 between the first head portion 110A and the inner surface of the housing 120 in Figure 2 changes, the waveform of the frequency response graph, the position of notch n1, the number of notches n1, the amplitude reduction, etc., may change. The distance between the head portion 110 and the inner surface of the housing 120 can be formed independently of each other. For example, the distance d1 between the first head portion 110A and the inner surface of the housing 120 and the distance between the second head portion 110B and the inner surface of the housing 120 can be the same or different from each other.

[0061] A second embodiment will be described. Content not covered above will be explained briefly. Content that overlaps with what has been explained above will be omitted or explained more briefly.

[0062] Referring to Figures 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 arranged in order along a counterclockwise direction around the grounding member 201. The first resonator 208A may be connected to the input port 211, and the fifth resonator 208E may be connected to the output port 213.

[0063] According to the second embodiment, the first resonator 208A, the third resonator 208C, and the fifth resonator 208E are not connected to the grounding member 201, while 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 to the right of the passband shown in the frequency response graph.

[0064] According to the second embodiment, the arrangement of the multiple resonators 208 can be in an interdigital configuration. 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 can be arranged in that order. When arranged in an interdigital configuration, a large number of notches n can be easily formed. Desired frequency characteristics can be obtained by utilizing the interdigital configuration.

[0065] The frequency response 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, if the angle A2 or distance d3 in the second embodiment (Figure 6) changes, the frequency response may change.

[0066] The frequency characteristics may change depending on the distance between the grounding member 201 and the head portion 210. For example, if the distance d2 between the third head portion 210C and the grounding member 201 in Figure 6 changes, the waveform of the frequency characteristics graph, the position of notch n2, the number of notches n2, the amplitude reduction, etc., may change.

[0067] The frequency characteristics can change depending on the size and shape of the head portion 210. Referring to Figure 6, the third head portion 210C is smaller in 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 shape of the third head portion 210C differs from that of the adjacent fourth head portion 210D. As in the third embodiment, the desired frequency characteristics can be obtained by adjusting the size, shape, etc., of each head portion 210.

[0068] A third embodiment will be described. Content not covered above will be explained briefly. Content that overlaps with what has been explained above will be omitted or explained more briefly.

[0069] Referring to Figures 8 to 10, the filter structure 3 according to the 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 arranged in order along a counterclockwise direction with respect to the grounding member 301. The first resonator 308A may be connected to the input port 311, and the fifth resonator 308E may be connected to the output port 313.

[0070] According to the third embodiment, the filter structure 3 may include a passage 315. The passage 315 enables electrical connections between multiple resonators 308. The passage 315 can change the waveform of the frequency response graph, the position of notch n3, the number of notches n3, the amplitude reduction, etc. The biggest difference between the third embodiment (Figures 8 to 10) and the second embodiment (Figures 5 to 7) is the presence or absence of the passage 315. The presence or absence of the passage 315 results in different frequency characteristics between the third embodiment and the second embodiment (Figures 7 and 10). Specifically, in the third embodiment, notches n3 occur to the left and right of the passband, while in the second embodiment, a notch n2 occurs to the right of the passband.

[0071] A fourth embodiment will be described. Content not covered above will be explained briefly. Content that overlaps with what has been explained above will be omitted or explained more briefly.

[0072] Referring to Figures 11 to 13, the filter structure 4 according to the 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 arranged in order along a counterclockwise direction with respect to the grounding member 401. The first resonator 408A may be connected to the input port 411, and the fifth resonator 408E may be connected to the output port 413. According to the fourth embodiment, the first resonator 408A, the third resonator 408C, and the fifth resonator 408E are connected to the grounding member 401, while the second resonator 408B and the fourth resonator 408D do not need to be connected to the grounding member 401. According to the fourth embodiment, the notch n4 may occur to the right of the passband shown in the frequency response graph.

[0073] According to the fourth embodiment, the arrangement of the multiple resonators 408 can be in an interdigital configuration. 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 can be arranged in that order. When arranged in an interdigital configuration, a number of notches n4 can be easily formed. Desired frequency characteristics can be obtained by utilizing the interdigital configuration.

[0074] A fifth embodiment will be described. Content not covered above will be explained briefly. Content that overlaps with what has been explained above will be omitted or explained more briefly.

[0075] Referring to Figures 14 to 16, the filter structure 5 according to the 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 arranged in order along a counterclockwise direction with respect to the grounding member 501. The first resonator 508A may be connected to the input port 511, and the fifth resonator 508E may be connected to the output port 513.

[0076] 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 does not need to be connected to the grounding member 501. The wall member 507 may be located between the first resonator 508A and the fifth resonator 508E.

[0077] According to the fifth embodiment, a penetrating member 550 that penetrates the wall member 507 may be included. The shape of the penetrating member 550 is not limited by the disclosure in the drawings. For example, the penetrating member 550 may be cylindrical. The penetrating member 550 may be spherical.

[0078] The wall member 507 blocks electrical connections, but if the wall member 507 includes a through member 550, electrical connections may occur. For example, the first resonator 508A and the fifth resonator 508E may be electrically connected by the through member 550.

[0079] According to the fifth embodiment, the notch n5 may occur to the right of the passband shown in the frequency response graph.

[0080] According to the fifth embodiment, it is also possible that only a portion of the resonator 508 is arranged in an interdigital configuration. For example, the second resonator 508B, the third resonator 508C, and the fourth resonator 508D in the fifth embodiment are arranged in an interdigital configuration.

[0081] Further embodiments of the present disclosure will be described. The filter structures 1 to 5 of the present invention may be constructed in the form of a microstrip line or strip line using a dielectric substrate. Here, the dielectric substrate may be a PCB (printed circuit board) substrate. In this case, the multiple resonators 108, 208 may be configured to be arranged between multiple layers of dielectric substrate. Thus, the configuration and / or shape of the filter structures 1 to 5 of the present invention are not limited by the disclosure of the drawings. The multiple resonators 108, 208 may be arranged between various components, and in this case as well, the multiple resonators 108, 208 may have an arrangement structure in which they are not parallel to each other, so that cross-coupling may occur between multiple non-adjacent resonators 108, 208.

[0082] The above description is merely illustrative of the technical concept of this embodiment, and a person with ordinary skill in the art to which this embodiment belongs could make various modifications and variations without departing from the essential characteristics of this embodiment. Therefore, this embodiment is for illustrative purposes only, not to limit the technical concept of this embodiment, and the scope of the technical concept of this embodiment is not limited by such embodiment. The scope of protection of this embodiment should be interpreted by the claims, and all technical concepts within an equivalent scope should be interpreted as being included in the scope of rights of this embodiment.

[0083] [Cross-reference with related applications] This patent application claims priority to patent application no. 10-2023-0107244, filed in Korea on 16 August 2023, which is included in its entirety as reference herein. [Explanation of Symbols]

[0084] 101 Grounding member 102 Upper surface of the grounding member 103 Lower surface of the grounding member 107 Wall components 108 Multiple resonators 109 Torso 110 Head section 111 input ports 113 Output Ports 120 Housing 121 Upper case 122 Lower case 315 Passage 550 Through member

Claims

1. Housing and A grounding member is disposed inside the housing, with one side in contact with the housing, A wall member extending from the inner surface of the housing and in contact with the grounding member, A plurality of resonators are arranged inside the housing and on a straight line extending radially from the grounding member, An input port connected to any one of the aforementioned plurality of resonators, The configuration includes an output port connected to one of the other resonators, The aforementioned plurality of resonators are arranged spaced apart from each other, A filter structure in which at least one of the plurality of resonators is connected to the grounding member on one side.

2. The filter structure according to claim 1, wherein one or more of the plurality of resonators are electrically connected to non-adjacent resonators.

3. The filter structure according to claim 1, wherein the other side of the grounding member does not come into contact with the housing.

4. The filter structure according to claim 1, wherein one or more of the plurality of resonators includes a head portion for adjusting the frequency characteristics.

5. The filter structure according to claim 1, wherein, among the plurality of resonators, the resonator connected to the grounding member does not come into contact with the inner surface of the housing.

6. The filter structure according to claim 5, wherein, among the plurality of resonators, the resonator connected to the grounding member includes a head portion on the other side.

7. One or more of the aforementioned resonators are not connected to the grounding member. The filter structure according to claim 1, wherein, of the plurality of resonators, the resonator not connected to the grounding member has one side in contact with the inner surface of the housing.

8. The filter structure according to claim 7, wherein, among the plurality of resonators, the resonator not connected to the grounding member includes a head portion on the other side.

9. The filter structure according to claim 1, wherein the shape of each of the plurality of resonators is formed independently.

10. The filter structure according to claim 1, wherein the wall member includes a passage for generating an electrical connection between the plurality of resonators.

11. Furthermore, the filter structure according to claim 1 includes one or more penetrating members that penetrate the wall member.

12. The filter structure according to claim 1, wherein the resonator connected to the input port and the resonator connected to the output port are arranged adjacent to each other.

13. The filter structure according to claim 12, wherein the wall member is disposed between the resonator connected to the input port and the resonator connected to the output port.

14. The filter structure according to claim 1, wherein the cross-section of the grounding member perpendicular to the longitudinal direction of the grounding member is polygonal in shape.

15. The filter structure according to claim 1, wherein the plurality of resonators are arranged alternately, with resonators connected to the grounding member and resonators not connected to the grounding member.

16. The filter structure according to claim 1, wherein all of the plurality of resonators are connected to the grounding member.

17. The plurality of resonators include a first to a fifth resonator arranged in order counterclockwise around the grounding member, The first resonator is connected to the input port, The 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 filter structure according to claim 1, wherein the second resonator and the fourth resonator are connected to the grounding member.

18. The wall member is located between the first resonator and the fifth resonator. The filter structure according to claim 17, wherein the wall member includes a passage for generating an electrical connection between the plurality of resonators.

19. The plurality of resonators include a first to a fifth resonator arranged in order counterclockwise around the grounding member, The first resonator is connected to the input port, The 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 filter structure according to claim 1, wherein the second resonator and the fourth resonator are not connected to the grounding member.

20. Furthermore, it includes at least one penetrating member that penetrates the wall member, The plurality of resonators include a first to a fifth resonator arranged in order counterclockwise around the grounding member, The first resonator is connected to the input port, The 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 third resonator is not connected to the grounding member. The filter structure according to claim 1, wherein the wall member is located between the first resonator and the fifth resonator.

21. The filter structure according to claim 1 is configured to be embodied in the form of a microstrip line or strip line, comprising at least one dielectric substrate.

Images