Filter structure

Abstract

The invention discloses a filter structure. According to one embodiment of the present disclosure, there is provided a filter structure comprising: a housing; a grounding member disposed inside the housing and having one side in contact with the housing; a wall member extending from an inner surface of the housing and contacting the ground member; a plurality of resonators disposed inside the housing and disposed on a straight line extending in a radial direction from the ground member; an input port connected to any one of the plurality of resonators; and an output port connected to another one of the plurality of resonators, the plurality of resonators being arranged at intervals, one side of at least one of the plurality of resonators being connected to the ground member.

Description

Technical Field

[0001] This disclosure relates to filter structures. Background Technology

[0002] The contents described in this section are merely for providing background information for this disclosure and do not constitute prior art.

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

[0004] A high-pass filter (HPF) is a filter that allows high-frequency signals to pass through while blocking low-frequency signals. A band-pass filter (BPF) is a filter that allows signals within a specific frequency band to pass through while blocking other signals. A low-pass filter (LPF) is a filter that allows low-frequency signals to pass through while blocking high-frequency signals.

[0005] The waveform of the frequency response graph changes depending on the frequency signals that the filter allows to pass through and the frequency signals that are blocked. The passband refers to the range of frequencies that the filter allows to pass through. The stopband refers to the range of frequencies that are blocked by the filter. Frequency response is a crucial factor determining the characteristics of a filter.

[0006] Achieving the desired frequency response is no easy task. It can lead to more complex filter structures and increased manufacturing costs due to added complexity. For example, a notch filter can be created to achieve the desired frequency response. A notch filter is a region in the frequency response curve where the amplitude drops sharply. Creating a notch filter can improve attenuation performance, but it requires additional structural elements. Summary of the Invention

[0007] (a) Technical problems to be solved Therefore, in order to solve the above problems, the main objective of this disclosure is to provide a filter structure that can form a notch on the frequency response curve without the need for additional structures.

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

[0009] Furthermore, the main objective of this disclosure is to provide a filter structure that can easily form a notch at the desired frequency by arranging resonators in an interdigital configuration.

[0010] (II) Technical Solution To achieve the above objectives, an embodiment of the present disclosure provides a filter structure comprising: a housing; a grounding member disposed inside the housing and in contact with the housing on one side; a wall member extending from the inner side 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 another of the plurality of resonators, wherein the plurality of resonators are arranged at intervals, and at least one of the plurality of resonators has one side connected to the grounding member.

[0011] (III) Beneficial Effects As described above, according to this embodiment, the filter structure can form a notch on the frequency response curve without the need for additional structures.

[0012] Furthermore, this disclosure enables cross-coupling between non-adjacent resonators.

[0013] Furthermore, this disclosure enables the easy formation of notch filters at the required frequency by using an interdigital arrangement of resonators. Attached Figure Description

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

[0015] Figure 2 This is a top view of a filter structure according to a first embodiment of the present disclosure.

[0016] Figure 3 This is a cross-sectional view of a filter structure according to the first embodiment of this disclosure.

[0017] Figure 4 This is a frequency response curve according to the first embodiment of the present disclosure.

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

[0019] Figure 6 This is a top view of a filter structure according to a second embodiment of the present disclosure.

[0020] Figure 7 This is a frequency response curve according to the second embodiment of the present disclosure.

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

[0022] Figure 9 This is a top view of a filter structure according to a third embodiment of the present disclosure.

[0023] Figure 10 This is a frequency response curve according to the third embodiment of the present disclosure.

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

[0025] Figure 12 This is a top view of a filter structure according to a fourth embodiment of the present disclosure.

[0026] Figure 13 This is a frequency response curve according to the fourth embodiment of this disclosure.

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

[0028] Figure 15 This is a top view of a filter structure according to a fifth embodiment of the present disclosure.

[0029] Figure 16 This is a frequency response curve according to the fifth embodiment of this disclosure. Detailed Implementation

[0030] The following is a detailed description of some embodiments of the present disclosure with reference to the accompanying drawings. When assigning reference numerals to the components in the drawings, the same reference numerals are used as much as possible for the same components, even when labeled in another drawing. Furthermore, in the process of describing the present disclosure, detailed descriptions of related well-known structures or functions will be omitted if it is believed that such detailed descriptions would obscure the main points of the disclosure.

[0031] In describing this invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are merely for distinguishing one constituent element from another and do not limit their nature, order, or sequence.

[0032] When a component is described as "connected", "combined", or "in contact" with another component, it should be understood as a component being directly connected or in contact with another component, including cases where the two components are "connected", "combined", or "in contact" with each other.

[0033] Throughout the entire specification, if a constituent element "comprises" or "possesses" another constituent element, unless otherwise stated, it can be understood that a constituent element also includes the other constituent element, rather than that a constituent element excludes the other constituent element.

[0034] The terms "...part" and "module" used in the instruction manual refer to units that can perform at least one function, which can be implemented through hardware, software, or a combination of hardware and software.

[0035] It should be noted that, unless otherwise stated, the description of any one embodiment applies equally to another embodiment.

[0036] The following description of this disclosure, given with reference to the accompanying drawings, is intended to describe exemplary embodiments of the disclosure and not to represent the only embodiments that can be implemented with reference to the disclosure.

[0037] Figures 1 to 4 This is a schematic diagram of the filter structure and frequency response curve according to the first embodiment of this disclosure.

[0038] Figures 5 to 7 This is a schematic diagram of the filter structure and frequency response curve according to the second embodiment of this disclosure.

[0039] Figures 8 to 10 This is a schematic diagram of the filter structure and frequency response curve according to the third embodiment of this disclosure.

[0040] Figures 11 to 13 This is a schematic diagram of the filter structure and frequency response curve according to the fourth embodiment of this disclosure.

[0041] Figures 14 to 16 This is a schematic diagram of the filter structure and frequency response curve according to the fifth embodiment of this disclosure.

[0042] The following is an example of the first embodiment ( Figures 1 to 4 ) and / or the second embodiment ( Figures 5 to 7 Based on the present disclosure, the features of filter structures 1 to 5 will be described. For parts where there is no conflict, the description will be based on the reference numerals of the first and / or second embodiments. For example, multiple resonators 108, 208, 308, 408, and 508 according to various embodiments will be briefly described using reference numeral 108 in the first embodiment and / or reference numeral 208 in the second embodiment to maintain the brevity of the description. Features not included in the first and / or second embodiments will be described or will be explained with reference to the third to fifth embodiments.

[0043] Reference Figures 1 to 16According to this disclosure, filter structures 1 to 5 include all or part of a housing 120, a ground member 101, a wall member 107, multiple resonators 108 and 208, an input port 111, an output port 113, and a penetration member 550.

[0044] The interior of housing 120 is used to house components. Housing 120 may include an upper housing 121 and a lower housing 122. The size and shape of housing 120 are not limited to those shown in the figures. The upper surface of the upper housing 121 of housing 120 may be circular. The lower surface of the lower housing 122 of housing 120 may be circular. The longitudinal cross-section of housing 120 may be circular. The longitudinal cross-section of housing 120 may be polygonal. Depending on the shape of housing 120 and the size of the internal accommodating space, the frequency characteristics of filter structures 1 to 5 may differ. The size and shape of housing 120 can be adjusted according to the desired design.

[0045] Resonators 108 and 208 can contact the inner surface of the housing 120. In this case, resonators 108 and 208 are grounded with the housing 120. Assuming m is a natural number greater than or equal to 3, m resonators 108 and 208 are in contact with the housing 120. To facilitate contact between the m resonators 108 and 208 and the inner surface of 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. As described above, the inner surface of the housing 120 used to arrange the resonators 108 and 208 is a plane with non-zero curvature. When the resonators 108 and 208 are arranged along the inner surface of the housing 120, cross coupling (described later) can be formed. Multiple resonators 108 and 208 arranged along the inner surface of the housing 120 are not arranged parallel to each other, which may lead to cross coupling. That is, according to the filter structures 1 to 5 of this disclosure, cross coupling can be formed without additional structures on the multiple resonators 108 and 208.

[0046] The grounding component 101 is disposed inside the housing 120. The grounding component 101 may be disposed in the center of the housing 120.

[0047] The cross-sectional shape of the grounding component 101 along its length can be circular. Alternatively, the cross-sectional shape of the grounding component 101 along its length can be polygonal. Assuming m is a natural number greater than or equal to 3, m resonators 108 and 208 are in contact with the grounding component 101. To facilitate contact between the m resonators 108 and 208 and the grounding component 101, the cross-section perpendicular to the length of the grounding component 101 can be an m-sided polygon. The size and shape of the grounding component 101 are not limited to those shown in the figures. As described above, the outer surface of the grounding component 101 used to arrange the resonators 108 and 208 is a plane with non-zero curvature. When the resonators 108 and 208 are arranged along the outer surface of the grounding component 101, cross-coupling as described later can be formed. Multiple resonators 108 and 208 arranged along the outer surface of the grounding component 101 that are not parallel to each other may form cross-coupling. That is, cross-coupling can be formed without additional structures on the multiple resonators 108 and 208.

[0048] The grounding component 101 can contact the wall component 107. A portion of the wall component 107 can be inserted into the grounding component 101.

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

[0050] According to one embodiment, the grounding component 101 can be grounded by contacting one side of the housing 120. The other side of the grounding component 101 may not be in contact with the housing 120. Specifically, the lower surface 103 of the grounding component 101 may be in contact with the lower housing 122 of the housing 120, while the upper surface 102 of the grounding component 101 may not be in contact with the housing 120. In this case, a free space is formed between the housing 120 and the upper surface 102 of the grounding component 101, which can form cross-coupling. Cross-coupling refers to the phenomenon where non-adjacent resonators 108 and 208 are electrically connected. For example, the first resonator 108A and the third resonator 108C, which are not adjacent to each other, are electrically connected. Based on cross-coupling, various forms of notch n can be formed. The shape of the notch formed based on cross-coupling is not limited to the shape shown in the figures. Notch n refers to the portion of the frequency response curve where the waveform changes rapidly and decreases. Notch n can be used to obtain desired frequency characteristics, such as improving attenuation performance. For example, based on the passband shown in the frequency response curve, a notch n can be formed on the left and / or right sides.

[0051] To obtain the desired frequency characteristics, a notch filter can be formed by adjusting the shape, size, position, and number of components such as the grounding component 101, the housing 120, multiple resonators 108 and 208, the wall component 107, the channel 315, and the through component 550.

[0052] Wall member 107 may extend and be formed from the inner side of housing 120. Wall member 107 may contact grounding member 101. Wall member 107 may be arranged between a resonator connected to input port 111 and a resonator connected to output port 113. For example, wall member 107 may be arranged between first resonator 108A and fifth resonator 108E. Wall member 107 may be arranged in contact with upper housing 121. Wall member 107 may be arranged in contact with lower housing 122.

[0053] The wall component 107 can block electrical connections between multiple resonators 108, 208. For example, it can prevent electrical connections from occurring via the path P1 through the wall component 107. For example, it can block electrical connections between adjacent first resonators 108A and fifth resonators 108E.

[0054] By adjusting the shape, size, position, and number of wall components 107, the frequency characteristics of filter structures 1 to 5, the number of notch filters n, and the position of notch filters n can be adjusted. The shape, size, position, and number of wall components 107 are not limited to those shown in the attached figures.

[0055] The wall component 107 may include a channel 315 to form an electrical connection between multiple resonators 108, 208. While the wall component 107 can block the electrical connection, when including the channel 315, it can also form an electrical connection between the multiple resonators 108, 208. By adjusting the shape, size, position, and number of channels 315, the frequency characteristics of filter structures 1 to 5, the position of notch filter n, the number of notch filters n, etc., can be adjusted. The shape, size, position, and number of channels 315 are not limited to those shown in the figures. For example, the shape of the channel 315 may be smaller than that shown in the figures. For example, unlike that shown in the figures, the channel 315 may be circular.

[0056] Multiple resonators 108 and 208 are arranged inside the housing 120. The shape, size, position, and number of the resonators 108 and 208 can be adjusted to obtain the desired notch filtering and / or frequency characteristics. The multiple resonators 108 and 208 can be arranged spaced apart. The multiple resonators 108 and 208 can be arranged in a straight line extending radially from the grounding component 101.

[0057] Multiple resonators 108 and 208 can be arranged non-parallel. The shape of the outer surface of the grounding component 101 allows for the non-parallel arrangement of the multiple resonators 108 and 208. The shape of the inner surface of the housing 120 also allows for the non-parallel arrangement of the multiple resonators 108 and 208. When the multiple resonators 108 and 208 are arranged non-parallel, cross-coupling can be formed. Adjusting the cross-coupling allows for the acquisition of the desired frequency characteristics.

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

[0059] According to one embodiment, at least one of the plurality of resonators 108, 208 may not be connected to the grounding component 101. The resonators 108, 208 not connected to the grounding component 101 may contact the inner surface of the housing 120.

[0060] At least one of the multiple resonators 108, 208 may include a head 110. The head 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 110, the frequency response curves of the filter structures 1 to 5, the position of the notch filter n, the number of notch filters n, etc., can be changed.

[0061] According to one embodiment, the resonators 108, 208 connected to the grounding component 101 may include a head 110 on the side adjacent to the inner surface of the housing 120. According to another embodiment, the resonators 108, 208 not connected to the grounding component 101 may include a head 110 on the side adjacent to the grounding component 101. For example, in the second embodiment (… Figure 5 and Figure 6 The second resonator 208B and the fourth resonator 208D, which are connected to the grounding component 201 in the resonator 208, may include heads 210B and 210D on the side adjacent to the lower housing 222. For example, the first resonator 208A, the third resonator 208C, and the fifth resonator 208E, which are not connected to the grounding component 201, may include heads 210A, 210C, and 210E on the side adjacent to the grounding component 201.

[0062] The shape, size, position, and number of the multiple resonators 108 and 208 are not limited to those shown in the attached figures. The size and / or shape of each of the multiple resonators 108 and 208 can be formed independently.

[0063] Unlike existing resonators that are vertically arranged on a plane, the plurality of resonators 108, 208 according to this disclosure are arranged to contact the outer surface of the grounding component 101 or the inner surface of the housing 120. That is, the plurality of resonators 108, 208 according to this disclosure can be arranged non-parallel. Due to the non-parallel arrangement, cross-coupling can be formed. Existing resonators 108 require additional structures to form cross-coupling, however, the plurality of resonators 108, 208 according to this disclosure can form cross-coupling without additional structures. That is, it has the effect of saving costs.

[0064] All or some of the multiple resonators 108, 208 can be arranged in an interdigital configuration. An interdigital configuration refers to a configuration in which resonators 108, 208 connected to the ground component 101 are alternately arranged with resonators 108, 208 not connected to the ground component 101. For example, in the second embodiment (… Figure 5 and Figure 6 The first resonator 208A (not connected to ground component 201), the second resonator 208B (connected to ground component 201), the third resonator 208C (not connected to ground component 201), the fourth resonator 208D (connected to ground component 201), and the fifth resonator 208E (not connected to ground component 201) are arranged alternately. (See the fifth embodiment.) Figure 14 and Figure 15 As shown, only a portion of the resonators can be arranged in an interdigitated pattern. For example, the second resonator 508B, the third resonator 508C, and the fourth resonator 508D in the fifth embodiment are arranged in an interdigitated pattern. When arranged in an interdigitated pattern, multiple notch filters n can be easily formed. By using an interdigitated pattern, the desired frequency characteristics can be obtained.

[0065] Input port 111 can be connected to any one of the multiple resonators 108 and 208. Output port 113 can be connected to any one of the multiple resonators 108 and 208.

[0066] According to one embodiment, resonators 108, 208 connected to input port 111 and resonators 108, 208 connected to output port 113 may be arranged adjacent to each other. According to one embodiment, wall member 107 may be arranged between the resonators 108, 208 connected to input port 111 and the resonators 108, 208 connected to output port 113.

[0067] The through member 550 can penetrate the wall members 107 and 507. The wall members 107 and 507 can fix the through member 550. There can be at least one through member 550 for penetrating the wall members 107 and 507. While the wall members 107 and 507 serve to block electrical connections, electrical connections can be formed between multiple resonators 108 and 208 based on the through member 550.

[0068] The shape, size, position, and number of the through-parts 550 are not limited to those shown in the attached drawings. Figure 14 The through-hole component 550 shown is positioned near the upper housing 521, but is not limited thereto. The through-hole component 550 can also be positioned near the lower housing 522. The through-hole component 550 can be arranged on the same plane as multiple resonators 508. By adjusting the shape, size, position, and number of the through-hole component 550, the frequency characteristics, the position of the notch filter n, and the number of notch filters n can be adjusted.

[0069] The first embodiment is described below. Content not previously mentioned will be emphasized. Content that overlaps with previously mentioned content will be omitted or briefly explained.

[0070] Reference Figures 1 to 4 According to a first embodiment of this disclosure, multiple resonators 108 can be connected to a grounding component 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 can be connected to an input port 111, and the fifth resonator 108E can be connected to an output port 113.

[0071] According to the filter structure 1 of the first embodiment, cross-coupling can be formed. For example, the first resonator 108A can be electrically connected to the non-adjacent third resonator 108C to the fifth resonator 108E. Based on the cross-coupling, a notch filter n1 can be formed. Using the passband of the frequency response curve as a reference, the notch filter n1 can be formed on the right side.

[0072] The first resonator 108A to the fifth resonator 108E can be arranged non-parallel. This is because the outer surface of the grounding component 101 is a plane with a non-zero curvature. The heads 110 of the first resonator 108A to the fifth resonator 108E are all arranged in different directions. The non-parallel arrangement of the first resonator 108A to the fifth resonator 108E allows for cross-coupling.

[0073] The upper surface 102 of the grounding component 101 does not contact the upper housing 121. Figure 3 That is, a free space is formed between the upper surface 102 of the grounding component 101 and the outer casing 120. Based on the free space, cross coupling can be formed.

[0074] The frequency response can change depending on the angle between adjacent resonators 108. For example, when the angle A1 between adjacent first resonators 108A and second resonators 108B ( Figure 2 When the frequency response curve changes, the waveform, the position of the notch filter n1, the number of notch filters n1, and the magnitude of the amplitude reduction can all 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 can be the same as or different from the angle between the second resonator 108B and the third resonator 108C.

[0075] The frequency characteristics can change depending on the distance between the head 110 and the inner surface of the housing 120. For example, Figure 2When the distance d1 between the first head 110A and the inner surface of the outer casing 120 changes, the waveform of the frequency response curve, the position of the notch filter n1, the number of notch filters n1, and the magnitude of the amplitude reduction may change. The distance between the inner surface of the head 110 and the inner surface of the outer casing 120 can be formed independently. For example, the distance d1 between the first head 110A and the inner surface of the outer casing 120 and the distance between the second head 110B and the inner surface of the outer casing 120 may be the same or different.

[0076] The second embodiment is described below. Content not previously mentioned will be emphasized. Content that overlaps with previously mentioned content will be omitted or briefly explained.

[0077] Reference Figures 5 to 7 According to the second embodiment of this disclosure, the filter structure 2 may include a first resonator 208A to a fifth resonator 208E. The first resonator 208A to the fifth resonator 208E may be arranged sequentially in a counterclockwise direction with the grounding component 201 as the center. 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.

[0078] According to a second embodiment of this disclosure, the first resonator 208A, the third resonator 208C, and the fifth resonator 208E are not connected to the grounding component 201, while the second resonator 208B and the fourth resonator 208D can be connected to the grounding component 201. According to the second embodiment, based on the passband shown in the frequency response curve, a notch filter n2 can be formed on the right side.

[0079] According to the second embodiment, multiple resonators 208 can be arranged in an interfinite pattern. Specifically, a first resonator 208A not connected to the ground component 201, a second resonator 208B connected to the ground component 201, a third resonator 208C not connected to the ground component 201, a fourth resonator 208D connected to the ground component 201, and a fifth resonator 208E not connected to the ground component 201 can be arranged sequentially. When arranged in an interfinite pattern, multiple notch filters n can be easily formed. The desired frequency characteristics can be obtained using the interfinite pattern arrangement.

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

[0081] The frequency characteristics can change depending on the distance between the grounding component 201 and the head 210. For example, Figure 6When the distance d2 between the third head 210C and the grounding component 201 changes, the waveform of the frequency response curve, the position of the notch filter n2, the number of notch filters n2, and the magnitude of the amplitude reduction may change.

[0082] The frequency characteristics can change depending on the size and shape of the head 210. (Refer to...) Figure 6 The third head 210C is smaller than the other heads 210. The third head 210C has a different shape than the other heads 210. For example, the shape of the third head 210C is different from the shape of the adjacent fourth head 210D. As shown in the third embodiment, the desired frequency characteristics can be obtained by adjusting the size, shape, etc. of each head 210.

[0083] The third embodiment is described below. Content not previously mentioned will be emphasized. Content that overlaps with previously mentioned content will be omitted or briefly described.

[0084] Reference Figures 8 to 10 According to the third embodiment of this disclosure, the filter structure 3 may include a first resonator 308A to a fifth resonator 308E. The first resonator 308A to the fifth resonator 308E may be arranged sequentially in a counterclockwise direction with the grounding component 301 as the center. 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.

[0085] According to the third embodiment, the filter structure 3 may include a channel 315. Channel 315 enables electrical connections between multiple resonators 308. Depending on channel 315, the waveform of the frequency response curve, the position of the notch filter n3, the number of notch filters n3, and the magnitude of amplitude reduction can be changed. (Third embodiment) Figures 8 to 10 ) and the second embodiment ( Figures 5 to 7 The biggest difference between the third and second embodiments lies in whether or not channel 315 is included. Depending on whether channel 315 is included, the third and second embodiments have different frequency characteristics. Figure 7 and Figure 10 Specifically, in the third embodiment, a notch filter n3 is formed on the left and right sides based on the passband, while in the second embodiment, the notch filter n3 can be formed on the right side based on the passband.

[0086] The fourth embodiment is described below. Content not previously mentioned will be emphasized. Content that overlaps with previously mentioned content will be omitted or briefly described.

[0087] Reference Figures 11 to 13According to the fourth embodiment of this disclosure, the filter structure 4 may include a first resonator 408A to a fifth resonator 408E. The first resonator 408A to the fifth resonator 408E are arranged sequentially in a counter-clockwise direction with the grounding component 401 as the center. 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 may be connected to the grounding component 401, while the second resonator 408B and the fourth resonator 408D are not connected to the grounding component 401. According to the fourth embodiment, based on the passband shown in the frequency response curve, a notch filter n4 may be formed on the right side.

[0088] According to the fourth embodiment, multiple resonators 408 can be arranged in an interfinite pattern. Specifically, a first resonator 408A connected to the ground component 401, a second resonator 408B not connected to the ground component 401, a third resonator 408C connected to the ground component 401, a fourth resonator 408D not connected to the ground component 401, and a fifth resonator 408E connected to the ground component 401 can be arranged sequentially. When arranged in an interfinite pattern, multiple notch filters n4 can be easily formed. The desired frequency characteristics can be obtained using the interfinite pattern arrangement.

[0089] The fifth embodiment is described below. Content not previously mentioned will be emphasized. Content that overlaps with previously mentioned content will be omitted or briefly described.

[0090] Reference Figures 14 to 16 According to the fifth embodiment of this disclosure, the filter structure 5 may include a first resonator 508A to a fifth resonator 508E. The first resonator 508A to the fifth resonator 508E may be arranged sequentially in a counterclockwise direction with the grounding component 501 as the center. 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.

[0091] According to the fifth embodiment, the first resonator 508A, the second resonator 508B, the fourth resonator 508D, and the fifth resonator 508E may be connected to the grounding component 501. The third resonator 508C may not be connected to the grounding component 501. The wall component 507 may be located between the first resonator 508A and the fifth resonator 508E.

[0092] According to the fifth embodiment, a through member 550 may be included for penetrating the wall member 507. The shape of the through member 550 is not limited to that shown in the drawings. For example, the through member 550 may be cylindrical. The through member 550 may be spherical.

[0093] The wall component 507 is used to block electrical connections; however, when the wall component 507 includes a through component 550, an electrical connection can be formed. For example, the first resonator 508A and the fifth resonator 508E can be electrically connected through the through component 550.

[0094] According to the fifth embodiment, based on the passband shown in the frequency response curve, a notch filter n5 can be formed on the right side.

[0095] According to the fifth embodiment, only a portion of the resonator 508 may be arranged in an interdigitated pattern. For example, the second resonator 508B, the third resonator 508C, and the fourth resonator 508D in the fifth embodiment are arranged in an interdigitated pattern.

[0096] Another embodiment of this disclosure is described below. The filter structures 1 to 5 of the present invention can be formed into microstrip lines or strip lines using a dielectric substrate. The dielectric substrate can be a PCB (printed circuit board) substrate. In this case, multiple resonators 108, 208 can be arranged between multilayer dielectric substrates. As described above, the structure and / or shape of the filter structures 1 to 5 of the present invention are not limited to those shown in the drawings. Multiple resonators 108, 208 can be arranged among various components. In this case, the multiple resonators 108, 208 can have a non-parallel arrangement structure, and cross-coupling can be formed between the multiple non-adjacent resonators 108, 208.

[0097] The above description is merely illustrative of the technical concept of this embodiment. For those skilled in the art, various modifications and variations can be made without departing from the essential characteristics of this embodiment. Therefore, this embodiment is not intended to limit the technical concept but is for illustrative purposes, and the scope of the technical concept is not limited by the described embodiment. The scope of protection of this embodiment should be interpreted based on the appended claims, and all technical concepts within the equivalent scope should be interpreted as falling within the scope of the rights of this embodiment.

[0098] [Explanation of reference numerals in the attached figures] 101: Grounding component 102: Upper surface of the grounding component 103: Lower surface of the grounding component 107: Wall components 108: Multiple resonators 109: Main Body 110: Head 111: Input Port 113: Output port 120: Outer shell 121: Upper box 122: Lower box 315: Channel 550: Through-part [Cross-references to related applications] This patent application claims priority to Korean Patent Application No. 10-2023-0107244, filed on August 16, 2023, and the entire contents of that priority are incorporated herein by reference.

Claims

1. A filter structure comprising: a housing; a ground member disposed inside the housing and contacting one side of the housing; a wall member extending from an inner side of the housing and contacting the ground member; a plurality of resonators disposed inside the housing and disposed on a straight line extending in a radial direction from the ground member; an input port connected to any one of the plurality of resonators; and an output port connected to another one of the plurality of resonators, the plurality of resonators being disposed apart, at least one of the plurality of resonators contacting the ground member on one side.

2. The filter structure according to claim 1, wherein at least any one of the plurality of resonators is electrically connected to a non-adjacent resonator.

3. The filter structure according to claim 1, wherein the other side of the ground member is not in contact with the housing.

4. The filter structure according to claim 1, wherein at least any one of the plurality of resonators includes a head portion for adjusting a frequency characteristic.

5. The filter structure according to claim 1, wherein the resonator of the plurality of resonators connected to the ground member is not in contact with the inner side of the housing.

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

7. The filter structure according to claim 1, wherein at least any one of the plurality of resonators is not connected to the ground member, and the resonator of the plurality of resonators not connected to the ground member is in contact with the inner side of the housing on one side.

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

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

10. The filter structure according to claim 1, wherein the wall member includes a passage for electrically connecting the plurality of resonators.

11. The filter structure according to claim 1, further comprising at least one through member for passing through the wall member.

12. The filter structure according to claim 1, wherein the resonator connected to the input port is disposed adjacent to the resonator connected to the output port.

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 a cross section of the ground member perpendicular to a length direction of the ground member is a polygon.

15. The filter structure according to claim 1, wherein the plurality of resonators are disposed in a manner that the resonator connected to the ground member and the resonator not connected to the ground member are alternately arranged. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 16. The filter structure according to claim 1, wherein the plurality of resonators are each connected to the ground member.

17. The filter structure according to claim 1, wherein the plurality of resonators include a first resonator to a fifth resonator arranged in order in a counterclockwise direction with the ground member as a center, 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 ground member, the second resonator and the fourth resonator are connected to the ground member.

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

19. The filter structure according to claim 1, wherein the plurality of resonators include a first resonator to a fifth resonator arranged in order in a counterclockwise direction with the ground member as a center, 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 ground member, the second resonator and the fourth resonator are not connected to the ground member.

20. The filter structure according to claim 1, wherein further comprising at least one through member for passing through the wall member, the plurality of resonators include a first resonator to a fifth resonator arranged in order in a counterclockwise direction with the ground member as a center, 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 ground member, the third resonator is not connected to the ground member, the wall member is located between the first resonator and the fifth resonator.

21. The filter structure according to claim 1, wherein comprises at least one dielectric substrate and constitutes a microstrip line or a stripline form.

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