Filter device

Abstract

The present invention provides a filter device that can generate a notch on the frequency response graph without installing any additional structures. [Solution] The filter device includes a housing, a grounding member disposed inside the housing with its lower surface 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 one of the plurality of resonators, wherein the plurality of resonators are spaced apart from each other, and one or more of the plurality of resonators are connected to the grounding member on one side.

Description

Technical Field

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

Background Art

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

[0003] A filter is a device that uses the characteristics of frequencies to block signals in an unwanted frequency band and allows only signals in a desired band 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 specific 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 that the filter allows to pass through and the frequency signals that it blocks. The passband means the range of frequencies that the filter allows to pass through. The stopband means the range of frequencies that the filter blocks. The 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 thus raising manufacturing costs. For example, a notch may 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 device that can generate notches on the frequency response graph without installing additional structures.

[0008] Furthermore, the primary objective of this disclosure is to provide a filter device that generates cross-coupling between non-adjacent resonators.

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

[0010] According to one embodiment of the present disclosure to achieve such objectives, a filter device is provided that includes a housing, a grounding member disposed inside the housing with one side in contact with the housing, a wall member in contact with the inner surface of the housing, a first ring member with its inner circumferential surface in contact with the grounding member, a second ring member with its outer circumferential 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 positioned between the first ring member and the second ring 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 in contact with the first ring 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 device according to the first embodiment of the present disclosure. [Figure 2] This is a plan view of a filter device according to the first embodiment of the present disclosure. [Figure 3] This is a cross-sectional view of a filter device 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]It is an exploded perspective view of a filter device according to a second embodiment of the present disclosure. [Figure 6] It is a plan view of a filter device according to a second embodiment of the present disclosure. [Figure 7] It is a frequency characteristic graph according to a second embodiment of the present disclosure. [Figure 8] It is an exploded perspective view of a filter device according to a third embodiment of the present disclosure. [Figure 9] It is a plan view of a filter device according to a third embodiment of the present disclosure. [Figure 10] It is a frequency characteristic graph according to a third embodiment of the present disclosure. [Figure 11] It is an exploded perspective view of a filter device according to a fourth embodiment of the present disclosure. [Figure 12] It is a plan view of a filter device 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 device according to a fifth embodiment of the present disclosure. [Figure 15] It is a plan view of a filter device 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.

Modes 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 they are shown on other drawings, they are given the same reference numerals as much as possible. Further, when it is determined that a detailed description of related known configurations or functions may obscure the gist of the present disclosure, the detailed description thereof will be omitted.

[0016] When describing 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 a component is described as being "connected", "coupled", or "joined" to another component, it is understood that the component can be directly connected or joined to the other component, but it should also be understood that other components can be "connected", "coupled", or "joined" between the components.

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

[0019] Terms such as "section" and "module" described in the specification mean a unit that processes at least one function or operation, and this can be implemented by hardware, software, or a combination of hardware and software.

[0020] It is clarified that, unless there is a contrary description, the description of any one embodiment can be applied to other embodiments.

[0021] The description of the invention disclosed below together with the attached drawings is intended to explain exemplary embodiments of the present invention, and is not intended to show the only embodiments in which the present invention can be implemented.

[0022] FIGS. 1 to 4 are drawings illustrating a filter device and a frequency characteristic graph according to a first embodiment of the present disclosure.

[0023] FIGS. 5 to 7 are drawings illustrating a filter device and a frequency characteristic graph according to a second embodiment of the present disclosure.

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

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

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

[0027] The features of filter devices 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 multiple resonators 108, 208, 308, 408, and 508 relating to various embodiments, for the sake of brevity in this specification, they 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 mentioned later by referring to the third to fifth embodiments.

[0028] Referring to Figures 1 to 16, the filter apparatus 1 to 5 according to this disclosure includes all or part of a housing 120, a ground member 100, a wall member 107, a plurality of resonators 108, 208, an input port 111, an output port 113, a first ring member 101, a second ring member 20, 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 devices 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 first ring member 101 may come into contact with the grounding 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.

[0031] The first ring member 101 can be fitted onto the grounding member 100. In this case, the inner surface of the first ring member 101 can contact the outer surface of the grounding member 100.

[0032] The first ring member 101 may be in contact with the resonator 108. The resonator 108 may be formed 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.

[0033] The second ring member 20 may 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.

[0034] 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 contact the inner surface of the housing 120.

[0035] The second ring member 20 may be in contact with the resonator 208. The resonator 208 may be formed extending from the second ring member 20. The resonator 208 in contact with the second ring member 20 will not be in contact with the first ring member 201.

[0036] The first ring members 101, 201 and / or the second ring member 20 may be formed integrally with one or more of the plurality of resonators 108, 208.

[0037] The second ring member 20 may be in contact with the inner surface of the housing 120. The cross-section perpendicular to the longitudinal direction of the inner surface of the housing 120 may be polygonal. The inner surface of the housing 120 in contact with the second ring member 20 is not a plane with zero curvature. When a resonator 208 is formed extending from the second ring member 20, cross coupling, as described later, may occur. Since the arrangement directions between the multiple resonators 108, 208 formed 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 this disclosure do not need to install additional structures on the multiple resonators 108, 208 in order to generate cross coupling.

[0038] The grounding member 100 is positioned inside the housing 120. The grounding member 100 may be positioned in the center of the housing 120. The grounding member 100 and the housing 120 may be formed integrally with each other.

[0039] The longitudinal cross-sectional shape of the grounding member 100 may be circular. The longitudinal cross-sectional shape of the grounding member 100 may be polygonal. The size and shape of the grounding member 100 are not limited by the disclosure in the drawings. 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 curvature of 0. When a resonator 108 is formed extending from the first ring member 101, cross-coupling, as described later, may occur. Since the arrangement directions between the plurality of resonators 108, 208 that are formed extending from the first ring member 101 are not parallel to each other, cross-coupling may occur. That is, it is not necessary to install additional structures on the plurality of resonators 108, 208 in order to cause cross-coupling.

[0040] The grounding member 100 may come into contact with the wall member 107. A portion of the wall member 107 may be inserted into the grounding member 100.

[0041] In 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 does not need to be in contact with the housing 120. Specifically, the lower surface 103 of the grounding member 100 is in contact with the lower case 122 of the housing 120, while the upper surface of the grounding member 100 does not need to be in contact with the housing 120. In this case, a gap is formed between the housing 120 and the upper surface of the grounding member 100, and cross-coupling may occur. Cross-coupling refers to the phenomenon in which an electrical connection occurs between non-adjacent resonators 108. 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 n that can be generated by cross-coupling is not limited to the shape disclosed in the drawings. Notch n refers to a portion 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.

[0042] To obtain the desired frequency characteristics, the shape, size, position, number, etc., of the grounding member 100, housing 120, multiple resonators 108, 208, wall member 107, passage 315, through member 550, first ring member 101, second ring member 20, etc., can be adjusted to generate notches.

[0043] The wall member 107 may be in contact with the inner surface of the housing 120. The wall member 107 may be in contact with the upper and lower surfaces of the housing 120. The wall member 107 may be formed extending from the inner surface of the housing 120. The wall member 107 may be formed integrally with the housing 120. The wall member 107 may be in contact with the grounding member 100. The wall member 107 may be in contact with the first ring member 101. The wall member 107 may be in contact with the second ring member 20. 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 to be in contact with the upper case 121. The wall member 107 may be positioned to be in contact with the lower surface of the housing 122. For example, the wall member 107 may be positioned so as to be in contact with the lower case 122.

[0044] The wall member 107 can block electrical connections between the 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 block electrical connections between the first resonator 108A and the fifth resonator 108E, which are located adjacent to each other.

[0045] The frequency characteristics of filter devices 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.

[0046] 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 filter devices 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, polygonal, etc.

[0047] The wall member 107 may include a groove 280 for securing the second ring member 20. The size, shape, and position of the groove 280 are not limited by the drawings.

[0048] The wall member 107 may be in contact with the grounding member 100, as shown in Figure 1. The wall member 107 does not need to be in contact with the grounding member 200, as shown in Figure 5.

[0049] Multiple resonators 108,208 are arranged inside the housing 120. The shape, size, position, number, etc., of the resonators 108 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 between the first ring member 101 and the second ring member 20. Multiple resonators 108,208 can be arranged on a straight line extending radially from the center of the housing 120 so that they are arranged between the first ring member 101 and the second ring member 20.

[0050] Multiple resonators 108,208 can be arranged so as not to be parallel to each other. The shape of the outer surface of the first ring 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 second ring member 20 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, a phenomenon in which non-adjacent resonators are electrically connected, can occur. The desired frequency characteristics can be obtained by adjusting the cross-coupling.

[0051] According to one embodiment, at least one of the multiple resonators 108, 208 may be in contact with the first ring member 101. The resonator 108 that is in contact with the first ring member 101 does not need to be in contact with the second ring member 20.

[0052] According to one embodiment, one or more of the multiple resonators 108, 208 do not need to be in contact with the first ring member 101. A resonator 108 that is not in contact with the first ring member 101 may be in contact with the second ring member 20.

[0053] One or more of the multiple 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 graphs of filter devices 1 to 5, the position of notch n, the number of notches n, etc., can be changed.

[0054] According to one embodiment, among the multiple resonators 108, 208, the resonator 108 in contact with the first ring member 101 may include a head portion 110 at the end adjacent to the second ring member 20. According to one embodiment, among the multiple resonators 108, 208, the resonator in contact with the second ring member 20 may include a head portion 110 at the end adjacent to the first ring 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 first ring member 201 include head portions 210B and 210D at the ends 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, and 210E at the ends adjacent to the first ring member 201.

[0055] 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.

[0056] Unlike conventional resonators that are arranged perpendicularly on a plane with zero curvature, the multiple resonators 108, 208 according to this disclosure are arranged to be in contact with the first ring member 101 or in contact with the second ring member 20. That is, 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 additional structures. That is, there is an effect of reducing costs.

[0057] All or some of the multiple resonators 108,208 can be arranged in an interdigital configuration. The interdigital configuration means that the resonators 108,208 connected to the first ring members 101,201 and the second ring member 208 are arranged alternately. For example, in the second embodiment (Figures 5 and 6), the first resonator 208A connected to the second ring member 20, the second resonator 208B connected to the first ring member 201, the third resonator 208C connected to the second ring member 20, the fourth resonator 208D connected to the first ring member 201, and the fifth resonator 208E connected to the second ring member 20 are arranged alternately. As in the fifth embodiment (Figures 14 and 15), it is also possible that only some of the multiple resonators 508 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.

[0058] 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.

[0059] 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 placed between the resonator 108 connected to the input port 111 and the resonator 108 connected to the output port 113.

[0060] 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 can create electrical connections between multiple resonators 508.

[0061] The shape, size, position, number, etc. of the through-member 550 are not limited by the disclosure in the drawings. The through-member 550 disclosed in Figure 14 is positioned closer to the upper surface of the housing 120 than to the lower surface of the housing 120, but is not limited to this. The through-member 550 may be positioned closer to the lower surface of the housing 120. The through-member 550 may be positioned on the same plane as the multiple resonators 108,208. 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-member 550.

[0062] 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.

[0063] 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 first ring member 101. The filter device 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.

[0064] The filter device 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.

[0065] 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 first ring 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.

[0066] The upper surface of the grounding member 100 and the upper surface of the housing 120 do not touch each other (Figure 3). That is, a gap 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 multiple resonators 108 due to this gap.

[0067] The frequency response can change depending on the angle between adjacent resonators 108. For example, if the angle A1 (Figure 2) between adjacent first resonators 108A and second resonators 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.

[0068] 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.

[0069] 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.

[0070] Referring to Figures 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 arranged in order along a counterclockwise direction with respect to the first ring member 201 and / or ground member 200. 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.

[0071] According to a second embodiment of this 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 occur to the right of the passband shown in the frequency response graph.

[0072] According to the second embodiment, the arrangement of the multiple resonators 208 can be in an interdigital configuration. 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 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.

[0073] 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, if the angle A2 in the second embodiment (Figure 6) changes, the frequency characteristics can change. For example, if the distance d3 between the second head portion 210B and the second ring member 20 in Figure 6 changes, the waveform of the frequency characteristic graph, the position of notch n1, the number of notches n1, the amplitude reduction, etc., can change. The distances 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 or different from each other.

[0074] The frequency characteristics can change depending on the distance between the first ring member 201 and the head portion 210. For example, if the distance d2 between the third head portion 210C and the first ring 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.

[0075] 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 even smaller in size than the other head portions 210. The third head portion 210C has a different shape when 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.

[0076] Each of the multiple 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 in Figure 5 may be formed integrally with the second ring member 20. For example, the second resonator 208B in Figure 5 may be formed integrally with the first ring member 201.

[0077] 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.

[0078] Referring to Figures 8 to 10, the filter device 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 around a first ring member 301 and / or ground member 300. 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.

[0079] According to the third embodiment, the filter device 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 whether or not the passage 315 is included. 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 on the left and right sides with respect to the passband, while in the second embodiment, a notch n2 occurs on the right side with respect to the passband.

[0080] 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.

[0081] Referring to Figures 11 to 13, the filter device 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 around a first ring member 401 and / or ground member 400. 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 to the right of the passband shown in the frequency response graph.

[0082] 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 first ring member 401, a second resonator 408B connected to the second ring member 40, a third resonator 408C connected to the first ring member 401, a fourth resonator 408D connected to the second ring member 40, and a fifth resonator 408E connected to the first ring 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.

[0083] 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.

[0084] Referring to Figures 14 to 16, the filter device 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 first ring member 501 and / or ground member 500. 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.

[0085] 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 located between the first resonator 508A and the fifth resonator 508E.

[0086] 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.

[0087] 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.

[0088] According to the fifth embodiment, the notch n5 may occur to the right of the passband shown in the frequency response graph.

[0089] 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.

[0090] In other embodiments, the filter devices 1 to 5 according to this disclosure do not need to include the first ring member 101 and / or the second ring member 20. For example, if the first ring member 101 is not included, all of the resonators 108, 208 can be connected to the second ring member 20.

[0091] Further embodiments of the present disclosure will be described. Filter devices 1 to 5 of the present invention may be configured 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 placed between dielectric substrates formed of multiple layers. Thus, the configuration and / or shape of filter devices 1 to 5 of the present invention are not limited by the disclosure of the drawings. The multiple resonators 108, 208 may be placed 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.

[0092] 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. [Cross-reference with related applications] This patent application claims priority to patent application no. 10-2023-0107242, filed in Korea on 16 August 2023, which is included herein by reference in its entirety. [Explanation of Symbols]

[0093] 20 Second ring member 100 Grounding member 101 First ring 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 Top case 122 Lower case 280 Groove 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 in contact with the inner surface of the housing, A first ring member whose inner circumferential surface is in contact with the grounding member, A second ring member whose outer surface is in contact with the housing, A plurality of resonators are arranged on a straight line extending radially from the center of the housing so as to be positioned between the first ring member and the second ring 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 device in which at least one of the plurality of resonators has one side in contact with the first ring member.

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

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

4. The filter device according to claim 1, wherein each of the plurality of resonators includes a head for adjusting the frequency characteristics.

5. The filter device according to claim 1, wherein, among the plurality of resonators, the resonator in contact with the first ring member does not come into contact with the second ring member.

6. The filter device according to claim 5, wherein, among the plurality of resonators, the resonator in contact with the first ring member includes a head portion on the other side.

7. One or more of the plurality of resonators does not come into contact with the first ring member. The filter device according to claim 1, wherein, among the plurality of resonators, the resonator that does not contact the first ring member has one side in contact with the second ring member.

8. The filter device according to claim 7, wherein, among the plurality of resonators, the resonator in contact with the second ring member includes a head portion on the other side.

9. The filter device according to claim 1, wherein the size and shape of each of the plurality of resonators are formed independently.

10. The filter device according to claim 1, wherein the wall member includes a passage that penetrates the wall member to generate an electrical connection between the plurality of resonators.

11. Furthermore, the filter device according to claim 1, further comprising one or more penetrating members that penetrate the wall member.

12. The filter device 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 device 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 device 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 device according to claim 1, wherein the plurality of resonators are arranged alternately, with resonators in contact with the first ring member and resonators in contact with the second ring member.

16. The plurality of resonators include a first to a fifth resonator arranged in order along a counterclockwise direction with respect to the first ring 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 in contact with the second ring member. The filter device according to claim 1, wherein the second resonator and the fourth resonator are in contact with the first ring member.

17. The wall member is located between the first resonator and the fifth resonator. The filter device according to claim 16, wherein the wall member includes a passage that penetrates the wall member to generate an electrical connection between the plurality of resonators.

18. 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 in contact with the first ring member. The filter device according to claim 1, wherein the second resonator and the fourth resonator are in contact with the second ring member.

19. 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 along a counterclockwise direction with respect to 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 in contact with the first ring member. The third resonator is in contact with the second ring member, The filter device according to claim 1, wherein the wall member is located between the first resonator and the fifth resonator.

20. Housing and A grounding member is disposed inside the housing, with one side in contact with the housing, A wall member in contact with the inner surface of the housing, A first ring member whose inner circumferential surface is in contact with the grounding member, Multiple resonators extending from the first ring 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 in a filter device.

21. Housing and A grounding member is disposed inside the housing, with one side in contact with the housing, A wall member in contact with the inner surface of the housing, A second ring member whose outer surface is in contact with the housing, Multiple resonators extending from the second ring 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 in a filter device.

22. The filter device 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.

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