Filter with stacked structure

Abstract

A filter having a stacked structure according to an embodiment includes: a plurality of plate-shaped ground portions stacked in a first direction; a plate-shaped information portion disposed between the plurality of ground portions while facing the plurality of ground portions in the first direction; a linear information portion disposed adjacent to at least one of the plurality of ground portions or the plate-shaped information portion in at least one of the second direction or the third direction; and a plurality of connection portions extending in a first direction intersecting the first direction and electrically connecting at least two of the plurality of ground portions, the plate-shaped signal member, and the linear information portion to each other, in which the second direction intersects the first direction and the third direction intersects each of the first and second directions.

Description

Technical Field

[0001] Embodiments of the present application relate to a filter having a stacked structure. Background Art

[0002] When a filter is implemented using multiple resonators, parasitic capacitance may be generated due to the potential difference between the grounds, which may deteriorate the matching performance of the filter. In addition, due to the separation between the grounds, the size of the filter may be increased. In addition, the efficiency of the inductor included in the resonator may be reduced due to the parasitic capacitance between the grounds. Therefore, due to the various reasons mentioned above, the performance of the filter may be deteriorated, and research is constantly being conducted to improve the performance of the filter. Summary of the invention

[0003] Technical issues

[0004] Embodiments of the present application provide a filter with a stacked structure having improved performance.

[0005] Technical Solution

[0006] The filter with a stacked structure according to an embodiment of the present application may include: a plurality of grounding parts stacked along a first direction, the grounding parts being in a plate shape; a plate signal part (plate signal part) arranged between the plurality of grounding parts and facing the plurality of grounding parts along the first direction; a line signal part (line signal part) arranged adjacent to at least one of the plurality of grounding parts or the plate signal part in at least one direction of the second direction or the third direction; and a plurality of connecting parts extending along the first direction for conductively connecting at least two of the plurality of grounding parts, the plate signal part and the line signal part to each other. The second direction may intersect with the first direction, and the third direction may intersect with each of the first direction and the second direction.

[0007] In one embodiment, the plurality of grounding portions may include a bottom grounding portion, a top grounding portion arranged above the bottom grounding portion in a first direction, a first insertion grounding portion arranged adjacent to the top grounding portion, a second insertion grounding portion arranged adjacent to the bottom grounding portion, a first separation grounding portion arranged between the first insertion grounding portion and the second insertion grounding portion in the first direction, a third insertion grounding portion adjacent to the bottom grounding portion and spaced apart from the second insertion grounding portion in the second direction, a fourth insertion grounding portion adjacent to the top grounding portion and spaced apart from the first insertion grounding portion in the second direction, and a second separation grounding portion arranged between the third insertion grounding portion and the fourth insertion grounding portion in the first direction. The first separation grounding portion may be conductively connected to the first and second insertion grounding portions, and the second separation grounding portion may also be conductively connected to the third and fourth insertion grounding portions.

[0008] In one embodiment, the plate-shaped information portion may include: a first plate-shaped information portion, which is spaced apart from each of the first insertion grounding portion and the first separation grounding portion in the first direction and is arranged between the first insertion grounding portion and the first separation grounding portion; a second plate-shaped information portion, which is spaced apart from each of the first separation grounding portion and the second insertion grounding portion in the first direction and is arranged between the first separation grounding portion and the second insertion grounding portion; a third plate-shaped information portion, which is spaced apart from each of the first plate-shaped information portion and the second plate-shaped information portion in the first direction and is arranged between the first plate-shaped information portion and the second plate-shaped information portion; a fourth plate-shaped information portion, which is spaced apart from each of the third insertion grounding portion and the second separation grounding portion in the first direction and is arranged between the third insertion grounding portion and the second separation grounding portion; a fifth plate-shaped information portion, which is spaced apart from each of the fourth insertion grounding portion and the second separation grounding portion in the first direction and is arranged between the fourth insertion grounding portion and the second separation grounding portion; and a sixth plate-shaped information portion, which is spaced apart from each of the fourth plate-shaped information portion and the fifth plate-shaped information portion in the first direction and is arranged between the fourth plate-shaped information portion and the fifth plate-shaped information portion.

[0009] In an embodiment, each of the first to sixth plate-shaped information portions may be arranged to be spaced apart from a ground portion adjacent thereto in the first direction among the plurality of ground portions with a dielectric placed therebetween.

[0010] In one embodiment, the first separated ground portion may have a planar shape, be spaced apart from the third plate-shaped information portion while surrounding the third plate-shaped information portion.

[0011] In one embodiment, the second separated ground portion may have a planar shape, be spaced apart from the sixth plate-shaped information portion while surrounding the sixth plate-shaped information portion.

[0012] In one embodiment, the plurality of connection portions may include: a first connection portion extending along the first direction to connect the first plate-shaped information portion and the third plate-shaped information portion to each other; and a second connection portion extending along the first direction to connect the fifth plate-shaped information portion and the sixth plate-shaped information portion to each other.

[0013] In one embodiment, the linear information portion may include: a first linear information portion, arranged to extend from the first plate-shaped information portion in a bending line shape along at least one of the second direction or the third direction; a second linear information portion, arranged to extend from the periphery of the first separation grounding portion in a bending line shape along at least one of the second direction or the third direction; a third linear information portion, arranged to extend from the fourth plate-shaped information portion in a bending line shape along at least one of the second direction or the third direction; and a fourth linear information portion, arranged to extend from the fifth plate-shaped information portion in a bending line shape along at least one of the second direction or the third direction.

[0014] In one embodiment, the plurality of connection portions may further include a third connection portion extending along the first direction to connect the second linear information portion and the second plate-shaped information portion to each other.

[0015] In one embodiment, the plurality of connections may include: a fourth connection extending along the first direction to connect the first insertion ground, the first separation ground, and the second insertion ground to each of the top ground and the bottom ground; a fifth connection extending along the first direction to connect the third insertion ground, the second separation ground, and the fourth insertion ground to each of the top ground and the bottom ground; a sixth connection connecting the first linear information portion to each of the top ground and the bottom ground; a seventh connection connecting the second linear information portion to each of the top ground and the bottom ground; an eighth connection connecting the third linear information portion to each of the top ground and the bottom ground; and a ninth connection connecting the fourth linear information portion to each of the top ground and the bottom ground.

[0016] In one embodiment, the second insertion grounding portion and the third insertion grounding portion may be arranged on the first layer so as to be spaced apart from each other in the second direction. The second plate-shaped information portion, the fourth plate-shaped information portion and the third linear information portion may be arranged on the second layer, which is located above the first layer in the first direction. The first and second separated grounding portions spaced apart from each other in the second direction, the third and sixth plate-shaped information portions spaced apart from each other in the second direction and the second linear information portion may be arranged on the third layer, which is located above the second layer in the first direction. The first and fifth plate-shaped information portions spaced apart from each other in the second direction and the first and fourth linear information portions may be arranged on the fourth layer, which is located above the third layer in the first direction. The first insertion grounding portion and the fourth insertion grounding portion may be arranged on the fifth layer, which is located above the fourth layer in the first direction, so as to be spaced apart from each other in the second direction.

[0017] In one embodiment, the filter having a stacked structure may further include a plurality of fences having a bar shape extending in the first direction, arranged adjacent to the first and fourth linear information portions, and conductively connecting the top ground portion and the bottom ground portion to each other.

[0018] In one embodiment, the plurality of fences may include: a first fence adjacent to the sixth connection portion; a second fence adjacent to the ninth connection portion; and an intermediate fence arranged along the second direction between the first fence and the second fence while being spaced apart from each other.

[0019] In one embodiment, the filter having the stack structure according to the present invention may have a transmission zero point which is determined according to the interval between the first line information section and the fourth line information section and the number of the plurality of fences.

[0020] In an embodiment, the first line information portion and the fourth line information portion may have a planar shape spaced apart from each other, and at least some of the plurality of fences are placed between the first line information portion and the fourth line information portion.

[0021] In one embodiment, the plurality of grounding parts, plate-shaped information parts and linear information parts may form a plurality of resonators separated from each other. The plurality of resonators may include a first resonator, a second resonator, a third resonator and a fourth resonator, wherein the first resonator includes a first insertion grounding part, a first plate-shaped information part, a third plate-shaped information part, a first separation grounding part and a first linear information part; the second resonator includes a first separation grounding part, a second plate-shaped information part, a third plate-shaped information part, a second insertion grounding part and a second linear information part; the third resonator includes a second separation grounding part, a fourth plate-shaped information part, a sixth plate-shaped information part, a third insertion grounding part and a third linear information part; the fourth resonator includes a fourth insertion grounding part, a fifth plate-shaped information part, a sixth plate-shaped information part, a second separation grounding part and a fourth linear information part.

[0022] In one embodiment, the filter having a stacked structure may further include: a first input / output port extending and protruding outward from a side of the first linear information portion connected to the first plate-shaped information portion; and a second input / output port extending and protruding outward from a side of the fourth linear information portion connected to the fifth plate-shaped information portion.

[0023] In one embodiment, the filter having a stacked structure may further include a dielectric in which a plurality of ground portions, a plate-shaped signal portion, a line-shaped signal portion, and a plurality of connection portions are embedded.

[0024] According to another embodiment, a filter having a stacked structure may include: a top ground portion and a bottom ground portion, which are arranged opposite to each other and vertically spaced apart from each other; a separation ground portion, which is arranged between the top ground portion and the bottom ground portion; a plurality of signal components, which are arranged between the separation ground portion and each of the top ground portion and the bottom ground portion to form a resonator; and a connecting portion, which connects the separation ground portion and the plurality of signal components to the top ground portion and the bottom ground portion.

[0025] Beneficial Effects

[0026] The filter with a stacked structure according to the present invention can have a compact configuration and low insertion loss, and can exhibit excellent performance. Since the center frequency and bandwidth can be easily adjusted, especially the transmission zero point can be accurately adjusted, and the order can be increased, the present invention can be easily applied to filters with various functions and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1An exploded perspective view showing the appearance of a filter according to an embodiment.

[0028] Figure 2 Shows Figure 1 A joint perspective view of what the filter looks like is shown.

[0029] Figure 3 Shows Figure 1 Front view of the filter shown.

[0030] Figure 4a Shows Figure 1 and Figure 3 Bottom view of the fifth layer in the filter shown.

[0031] Figure 4b Shows Figure 1 and Figure 3 Plan view of layers 1 to 4 in the filter shown, with only layer 5 removed.

[0032] Figure 4c Shows Figure 1 and Figure 3 Plan view of layers 1 to 3 in the filter shown, with layers 4 and 5 removed.

[0033] Figure 4d Shows Figure 1 and Figure 3 Plan view of the first and second layers in the filter shown with layers 3 to 5 removed.

[0034] Figure 4e Shows Figure 1 and Figure 3 A plan view of only the first layer of the filter shown, with layers 2 to 5 removed.

[0035] Figure 5 Shows Figure 1 Equivalent circuit of the filter shown.

[0036] Figure 6 are graphs explaining the characteristics of the filter according to the present invention. DETAILED DESCRIPTION

[0037] Hereinafter, the present disclosure will be described more fully with reference to the accompanying drawings, in which various embodiments are shown. However, these examples may be embodied in many different forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to make the present disclosure more comprehensive and complete and to more fully convey the scope of protection of the present disclosure to those skilled in the art.

[0038] It will be understood that when an element is referred to as being 'on' or “under” another element, it can be directly on / under the element, and one or more intervening elements may also be present.

[0039] In addition, when an element is referred to as being 'on' or 'under', 'under the element' as well as 'on the element' may be included based on the element.

[0040] Furthermore, relational terms, such as “first,” “second,” “upper,” and “lower” are used merely to distinguish one object or element from another object / element and do not necessarily require or relate to any physical or logical relationship or order between these objects or elements.

[0041] Hereinafter, a filter having a stacked structure according to an embodiment of the present disclosure (hereinafter referred to as a "filter") will be described with reference to the accompanying drawings. Although the Cartesian coordinate system (x-axis, y-axis, and z-axis) will be used to describe the filter for the convenience of description, the filter may also be described using other coordinate systems. For ease of description, the x-axis direction will be referred to as the third direction, the y-axis direction will be referred to as the first direction, and the z-axis direction will be referred to as the second direction. For example, when the first direction corresponds to a vertical direction, at least one of the second direction or the third direction intersecting the first direction may correspond to a horizontal direction.

[0042] Figure 1 An exploded perspective view showing the appearance of a filter according to an embodiment; Figure 2 Shows Figure 1 A joint perspective view of the appearance of the filter shown; Figure 3 Shows Figure 1 A front view of the filter shown;

[0043] Figure 4a Shows Figure 1 and Figure 3 A bottom view of the fifth layer in the filter shown; Figure 4b Shows Figure 1 and Figure 3 A plan view of layers 1 to 4 in the filter shown, with only layer 5 removed; Figure 4c Shows Figure 1 and Figure 3 A plan view of the first to third layers of the filter shown, with the fourth and fifth layers removed; Figure 4d Shows Figure 1 and Figure 3 A plan view of the first and second layers of the filter shown, with the third to fifth layers removed; and Figure 4e Shows Figure 1 and Figure 3A plan view of only the first layer of the filter shown, with layers 2 to 5 removed. For ease of description, Figure 3 Omitted Figure 1 The illustrations of the first to fourth linear information portions LS1 to LS4 are shown.

[0044] The filter according to the present invention may include a top ground 110T, a bottom ground 110B, separation grounds SG ( SG1 and SG2 ), a plurality of signal components, and a connection portion.

[0045] The top ground portion 110T and the bottom ground portion 110B may be arranged to be opposite to each other while being spaced apart from each other in a vertical direction.

[0046] The separation ground portions SG1 and SG2 may be disposed between the top ground portion 110T and the bottom ground portion 110B.

[0047] A plurality of signal components may be disposed between the separation grounds SG1 and SG2 and each of the top and bottom grounds 110T and 110B to form capacitors and inductors included in a resonator of the filter.

[0048] The connection portions are used to connect the separate ground portions SG1 and SG2 and a plurality of signal components to the top ground portion 110T and the bottom ground portion 110B.

[0049] The configuration of the filter according to the present invention will be described in more detail below.

[0050] The filter may include a plurality of ground portions, a plate-shaped signal portion PS, a line-shaped signal portion LS, and a plurality of connection portions.

[0051] A plurality of ground portions may be stacked along the first direction, and each of the plurality of ground portions may be plate-shaped, may be conductive, and may be made of metal.

[0052] The plurality of grounds may include a bottom ground 110B, a top ground 110T, first and second separation grounds SG1 and SG2 , and first to fourth insertion grounds IG ( IG1 , IG2 , IG3 , and IG4 ).

[0053] The top ground portion 110T may be arranged above the bottom ground portion 110B along the first direction. For example, the top ground portion 110T may overlap the bottom ground portion 110B along the first direction.

[0054] The first insertion ground IG1 may be disposed adjacent to the top ground 110T, and the second insertion ground IGBT may be disposed adjacent to the bottom ground 110B.

[0055] The first separation ground portion SG1 is arranged between the first insertion ground portion IG1 and the second insertion ground portion IG2 along the first direction. The first separation ground portion SG1 is used to separate the space between the top ground portion 110T and the bottom ground portion 110B along the first direction. For example, the first distance between the first separation ground portion SG1 and the top ground portion 110T along the first direction and the second distance between the first separation ground portion SG1 and the bottom ground portion 110B along the second direction may be the same, but the present invention is not limited thereto. That is, as described later, the first and second distances may be determined so that the capacitor included in the resonator has a desired capacitance.

[0056] The third insertion ground IG3 may be disposed adjacent to the bottom ground 110B and spaced apart from the second insertion ground IG2 in the second direction.

[0057] The fourth insertion ground IG4 may be disposed adjacent to the top ground 110T and spaced apart from the first insertion ground IG1 in the second direction.

[0058] The second separated grounding portion SG2 may be arranged between the third inserted grounding portion IG3 and the fourth inserted grounding portion IG4 along the first direction. The second separated grounding portion SG2 may be spaced apart from the first separated grounding portion SG1 along the second direction. Similar to the first separated grounding portion SG1, the second separated grounding portion SG2 is used to separate the space between the top grounding portion 110T and the bottom grounding portion 110B along the first direction. For example, the third distance at which the second separated grounding portion SG2 is spaced apart from the top grounding portion 110T along the first direction and the fourth distance at which the second separated grounding portion SG2 is spaced apart from the bottom grounding portion 110B along the second direction may be the same, but the present invention is not limited thereto. That is, as described later, the third and fourth distances may be determined so that the capacitor included in the resonator has a desired capacitance.

[0059] As described later, the first separation ground portion SG1 may be conductively connected to each of the first and second insertion ground portions IG1 and IG2 through the connection portion, and the second separation ground portion SG2 may be conductively connected to each of the third and fourth insertion ground portions IG3 and IG4 through the connection portion.

[0060] Meanwhile, the plate-shaped information portion may be arranged between the plurality of ground portions, may be arranged to face the plurality of ground portions along the first direction, and may be conductive. For example, the plate-shaped information portion may be made of metal.

[0061] The plate-shaped information portion may include first to sixth plate-shaped information portions PS1 to PS6.

[0062] The first plate-shaped information portion PS1 may be spaced apart from each of the first insertion ground portion IG1 and the first separation ground portion SG1 in the first direction, and may be disposed between the first insertion ground portion IG1 and the second separation ground portion SG1.

[0063] The second plate-shaped information portion PS2 may be spaced apart from each of the first separation ground portion SG1 and the second insertion ground portion IG2 in the first direction, and may be disposed between the first separation ground portion SG1 and the second insertion ground portion IG2.

[0064] The third plate-shaped information portion PS3 may be spaced apart from each of the first plate-shaped information portion PS1 and the second plate-shaped information portion PS2 in the first direction, and may be disposed between the first plate-shaped information portion PS1 and the second plate-shaped information portion PS2.

[0065] The fourth plate-shaped information portion PS4 may be spaced apart from each of the third insertion ground portion IG3 and the second separation ground portion SG2 in the first direction, and may be disposed between the third insertion ground IG3 and the second separation ground portion SG2.

[0066] The fifth plate-shaped information portion PS5 may be spaced apart from each of the fourth insertion ground portion IG4 and the second separation ground portion SG2 in the first direction, and may be disposed between the fourth insertion ground IG4 and the second separation ground portion SG2.

[0067] The sixth plate-shaped information portion PS6 may be spaced apart from each of the fourth plate-shaped information portion PS4 and the fifth plate-shaped information portion PS5 in the first direction, and may be disposed between the fourth plate-shaped information portion PS4 and the fifth plate-shaped information portion PS5.

[0068] In this case, each of the first to sixth plate-shaped information portions PS1 to PS6 may be arranged to be spaced apart from a corresponding ground portion adjacent thereto in the first direction among the plurality of ground portions with a dielectric disposed therebetween. The reason for this is to form a capacitor of a resonator to be described later.

[0069] According to this embodiment, the first separation ground portion SG1 may have a planar shape, spaced apart from the third plate-shaped information portion PS3 while surrounding the third plate-shaped information portion. Figure 3 and Figure 4c A gap (hereinafter referred to as a "first gap") G1 may be formed between the first separation ground portion SG1 and the third plate-shaped information portion PS3. A dielectric may be disposed in the first gap G1.

[0070] In addition, the second separation ground portion SG2 may have a planar shape, spaced apart from the sixth plate-shaped information portion PS6 while surrounding the sixth plate-shaped information portion. Figure 3 and Figure 4cA gap (hereinafter referred to as a "second gap") G1 may be formed between the second separation ground portion SG2 and the sixth plate-shaped information portion PS6. A dielectric may be disposed in the second gap G2.

[0071] Meanwhile, the linear information portion LS may be arranged adjacent to at least one of the plurality of ground portions or plate-shaped information portions along at least one of the second direction or the third direction, and may be made of a conductive material, for example, may be made of metal.

[0072] For example, the line information section may include first to fourth line information sections LS1 to LS4.

[0073] The first linear information portion LS1 may be arranged in a meander line shape, extending from the first plate-shaped information portion PS1 in at least one of the second direction or the third direction. According to the present invention, as shown in the figure, the first linear information portion LS1 may have a meander line shape, extending from the first plate-shaped information portion PS1 in the second direction and the third direction.

[0074] The second linear information portion LS2 may be arranged in a meander line shape, extending from the periphery of the first separated ground portion SG1 along at least one of the second direction or the third direction. According to the present invention, as shown in the figure, the second linear information portion LS2 may have a meander line shape, extending from the periphery of the first separated ground portion SG1 along the second direction and the third direction.

[0075] The third linear information portion LS3 may be arranged in a meander line shape, extending from the fourth plate-shaped information portion PS4 in at least one of the second direction or the third direction. According to the present invention, as shown in the figure, the third linear information portion LS3 may have a meander line shape, extending from the fourth plate-shaped information portion PS4 in the second direction and the third direction.

[0076] The fourth linear information portion LS4 may be arranged in a meander line shape, extending from the fifth plate-shaped information portion PS5 in at least one of the second direction or the third direction. According to the present invention, as shown in the figure, the fourth linear information portion LS4 may have a meander line shape, extending from the fifth plate-shaped information portion PS5 in the second direction and the third direction.

[0077] At the same time, the plurality of connection parts CP extend along the first direction to conductively connect at least two of the plurality of ground parts, the plate-shaped information parts and the line-shaped information parts to each other. To this end, the plurality of connection parts can be made of conductive metal.

[0078] According to the present invention, the plurality of connection parts may include first to ninth connection parts CP1 to CP9.

[0079] The first connection portion CP1 may extend in the first direction to conductively connect the first plate-shaped information portion PS1 and the third plate-shaped information portion PS3 to each other. Therefore, the first plate-shaped information portion PS1 and the third plate-shaped information portion PS3 may be connected to each other through the first connection portion CP1 to form an equipotential therebetween.

[0080] The second connection portion CP2 may extend in the first direction to conductively connect the fifth plate-shaped information portion PS5 and the sixth plate-shaped information portion PS6 to each other. Therefore, the fifth plate-shaped information portion PS5 and the sixth plate-shaped information portion PS6 may be connected to each other through the second connection portion CP2 to form an equipotential therebetween.

[0081] The third connection portion CP3 may extend along the first direction to conductively connect the second linear information portion LS2 and the second plate-shaped information portion PS2 to each other.

[0082] The fourth connection portion CP4 may extend in the first direction to conductively connect the first insertion ground portion IG1, the first separation ground portion SG1, and the second insertion ground portion IG2 to each of the top ground portion 110T and the bottom ground portion 110B. To this end, the fourth connection portion CP4 may include 4-1 to 4-4 connection portions CP41, CP42, CP43, and CP44, which conductively connect the four corners of each of the first insertion ground portion IG1, the first separation ground portion SG1, and the second insertion ground portion IGBT to each of the top ground portion 110T and the bottom ground portion 110B.

[0083] The fifth connection portion CP5 may extend along the first direction to conductively connect the third insertion ground IG3, the second separation ground SG2, and the fourth insertion ground IG4 to each of the top ground 110T and the bottom ground 110B. To this end, the fifth connection portion CP5 may include 5-1 to 5-4 connection portions CP51, CP52, CP53, and CP54, which conductively connect the four corners of each of the third insertion ground IG3, the second separation ground SG2, and the fourth insertion ground IGBT to each of the top ground 110T and the bottom ground 110B.

[0084] The sixth connection portion CP6 may conductively connect the first linear information portion LS1 to each of the top ground portion 110T and the bottom ground portion 110B.

[0085] The seventh connection portion CP7 may conductively connect the second linear information portion LS2 to each of the top ground portion 110T and the bottom ground portion 110B.

[0086] The eighth connection portion CP8 may conductively connect the third linear information portion LS3 to each of the top ground portion 110T and the bottom ground portion 110B.

[0087] The ninth connection portion CP9 may conductively connect the fourth linear information portion LS4 to each of the top ground portion 110T and the bottom ground portion 110B.

[0088] Meanwhile, the filter according to the present invention may further include a plurality of fences F.

[0089] The plurality of fences F may have a bar shape extending in the first direction, be arranged adjacent to the first linear information portion LS1 and the fourth linear information portion LS4, and conductively connect the top ground portion 110T and the bottom ground portion 110B to each other. The plurality of fences F may be conductive and may be made of metal.

[0090] The plurality of fences F may include first, second and intermediate fences F1, F2 and IF. The first fence F1 may be adjacent to the sixth connection portion CP6, the second fence F2 may be adjacent to the ninth connection portion CP9, and the intermediate fence IF may be arranged along the second direction and between the first and second fences F1 and spaced apart from each other.

[0091] As shown in the figure, the number of the plurality of fences F may be 13. However, the number of the plurality of fences F may be greater or less than 13, which is different from the figure.

[0092] The transmission zero point of the filter according to the present invention can be determined according to the interval between the first linear information portion LS1 and the fourth linear information portion LS4 and the number of the plurality of fences F. This will be described in detail later.

[0093] Reference Figure 4b , the first linear information portion LS1 and the fourth linear information portion LS4 may have a planar shape spaced apart from each other, with at least some of the plurality of fences F placed therebetween.

[0094] At the same time, if Figure 3 As shown, the filter according to the present invention can have a multi-layer structure, for example, a five-layer structure.

[0095] The multiple layers are sequentially referred to as the first layer LY1 to the fifth layer LY5 from bottom to top along the first direction. That is, the second layer LY2 is located above the first layer LY1 along the first direction, the third layer LY3 is located above the second layer LY2 along the first direction, the fourth layer LY4 is located above the third layer LY3 along the first direction, and the fifth layer LY5 is located above the fourth layer LY4 along the first direction.

[0096] The second and third insertion grounds IG2 and IG3 are arranged on the first layer LY1 so as to be spaced apart from each other in the second direction.

[0097] The second and fourth plate-shaped information portions PS2 and PS4 and the third line-shaped information portion LS3 which are spaced apart from each other in the second direction are arranged on the second layer LY2.

[0098] The first and second separated ground portions SG1 and SG2 spaced apart from each other in the second direction, the third and sixth plate-shaped information portions PS3 and PS6 spaced apart from each other in the second direction, and the second line-shaped information portion LS2 are arranged on the third layer LY3.

[0099] The first and fifth plate-shaped information portions PS1 and PS5 and the first and fourth line-shaped information portions LS1 and LS4 which are spaced apart from each other in the second direction are arranged on the fourth layer LY4.

[0100] The first insertion ground IG1 and the fourth insertion ground IG4 are arranged on the fifth layer LY5 so as to be spaced apart from each other in the second direction.

[0101] The filter according to an embodiment may include at least one unit module, and the unit module may include a plurality of resonators. That is, the plurality of grounding portions, plate-shaped signal portions, and line-shaped signal portions may form a plurality of resonators separated from each other. The unit module may be as follows: Figure 1 Configuration shown.

[0102] The filter according to another embodiment may include a plurality of unit modules arranged in at least one direction among the first to third directions, and each of the plurality of unit modules may be configured as follows: Figure 1 Configuration shown.

[0103] The plurality of resonators may include first to fourth resonators.

[0104] The first resonator may include a first insertion ground portion IG1, a first plate-shaped information portion PS1, a third plate-shaped information portion PS3, a first separation ground portion SG1, and a first line-shaped information portion LS1.

[0105] The second resonator may include a first separation ground portion SG1, a second plate-shaped information portion PS2, a third plate-shaped information portion PS3, a second insertion ground portion IG2, and a second line-shaped information portion LS2. In addition, a third connection portion CP3 may be included in the second resonator.

[0106] The third resonator may include a second separation ground portion SG2, a fourth plate-shaped information portion PS4, a sixth plate-shaped information portion PS6, a third insertion ground portion IG3, and a third line-shaped information portion LS3.

[0107] The fourth resonator may include a fourth insertion ground portion IG4, a fifth plate-shaped information portion PS5, a sixth plate-shaped information portion PS6, a second separation ground portion SG2, and a fourth line-shaped information portion LS4.

[0108] The filter according to the present invention may include a dielectric. A plurality of grounding portions, a plate-shaped signal portion, a line-shaped signal portion, and a plurality of connecting portions may be embedded in the dielectric. Figures 1 to 4e In the embodiment, a background color portion between the plurality of ground portions, the plate-shaped information portion, the line-shaped information portion, and the plurality of connection portions may correspond to a dielectric.

[0109] In particular, as mentioned above, in order to achieve the adoption of Figure 1 In the capacitors included in the first to fourth resonators of the structure shown, the dielectric may be arranged between the portions of the plurality of ground portions and the plate-shaped information portion facing each other. In this case, the plurality of connection portions and the plurality of fences may be embedded in the dielectric in the form of through holes. In this case, the through holes may be stacked through holes rather than through through holes.

[0110] For example, the dielectric may be fabricated using a low temperature co-fired ceramic (LTCC) process.

[0111] Hereinafter, the operation of the filter according to the above-described embodiment will be described with reference to the accompanying drawings.

[0112] Figure 5 Shows Figure 1 Equivalent circuit of the filter shown.

[0113] although Figure 1 The capacitors or inductors included in the resonator shown are distributed constant circuits, but to facilitate understanding Figure 1 The operation of the filter shown in Figure 5 The same circuit in is interpreted as a lumped constant circuit.

[0114] Figure 5 The filter shown may include first through fourth resonators 202 , 204 , 206 , and 208 .

[0115] The first resonator 202 may include a first inductor L1 and a first capacitor C1, the second resonator 204 may include a second inductor L2 and a second capacitor C2, the third resonator 206 may include a third inductor L3 and a third capacitor C3, and the fourth resonator 208 may include a fourth inductor L4 and a fourth capacitor C4.

[0116] also, Figure 5 The filter shown may also include fifth to seventh capacitors C5, C6, and C7 and fifth to ninth inductors L5, L6, L7, L8, and L9.

[0117] also, Figure 5The filter shown may also include first and second input / output ports PT1 and PT2. For example, the first input / output port PT1 may correspond to the input terminal of the filter, and the second input / output port PT2 may correspond to the output terminal of the filter. Alternatively, the first input / output port PT1 may correspond to the output terminal of the filter, and the second input / output port PT2 may correspond to the input terminal of the filter.

[0118] Next, first refer to Figure 1 and Figure 3 First to seventh capacitors C1, C2, C3, C4, C5, C6, and C7 included in the resonators 202, 204, 206, and 208 are described.

[0119] The first insertion ground portion IG1 and the first plate-shaped information portion PS1 may face each other with a dielectric placed therebetween to form a 1-1 capacitor C11; the first plate-shaped information portion PS1 and the first separation ground portion SG1 may face each other with a dielectric placed therebetween to form a 1-2 capacitor C12. In this case, Figure 3 The first capacitor C1 shown in FIG. 1 may include a capacitance component of each of the 1-1 capacitor C11 and the 1-2 capacitor C12. For example, Figure 5 The first capacitor C1 shown may correspond to Figure 3 The second capacitor C1 is shown, but the present invention is not limited thereto. That is, Figure 5 The illustrated first capacitor C1 may also include a capacitance component formed by the third plate-shaped signal portion PS3 and the first separated ground portion SG1, which face each other with a dielectric disposed therebetween.

[0120] The first separation grounding portion SG1 and the second plate-shaped information portion PS2 may face each other with a dielectric placed therebetween to form a 2-1st capacitor C21; the second plate-shaped information portion PS2 and the second insertion grounding portion IG2 may face each other with a dielectric placed therebetween to form a 2-2nd capacitor C22. In this case, Figure 3 The second capacitor C2 shown may include the capacitance components of each of the 2-1st capacitor C21 and the 2-2nd capacitor C22. Figure 5 The second capacitor C2 shown may correspond to Figure 3 The second capacitor C2 is shown, but the present invention is not limited thereto. That is, Figure 5 The illustrated second capacitor C2 may also include a capacitance component formed by the third plate-shaped signal portion PS3 and the first separated ground portion SG1, which face each other with a dielectric disposed therebetween.

[0121] The second separation ground portion SG2 and the fourth plate-shaped information portion PS4 may face each other with a dielectric placed therebetween to form a 3-1st capacitor C31; the fourth plate-shaped information portion PS4 and the third insertion ground portion IG3 may face each other with a dielectric placed therebetween to form a 3-2nd capacitor C32. In this case, Figure 3 The third capacitor C2 shown may include the capacitance component of each of the 3-1st and 3-2nd capacitors C31 and C32. Figure 5 The third capacitor C3 shown may correspond to Figure 3 The first capacitor C3 is shown, but the present invention is not limited thereto. That is, Figure 5 The third capacitor C3 shown may also include a capacitance component formed by the sixth plate-shaped signal portion PS6 and the second separated ground portion SG2, which face each other with a dielectric placed therebetween.

[0122] The fourth insertion ground portion IG4 and the fifth plate-shaped information portion PS5 may face each other with a dielectric placed therebetween to form a 4-1st capacitor C41; the fifth plate-shaped information portion PS5 and the second separation ground portion SG2 may face each other with a dielectric placed therebetween to form a 4-2nd capacitor C42. In this case, Figure 3 The fourth capacitor C4 shown may include the capacitance components of each of the 4-1st capacitor C41 and the 4-2nd capacitor C42. Figure 5 The fourth capacitor C4 shown may correspond to Figure 3 The first capacitor C4 is shown, but the present invention is not limited thereto. That is, Figure 5 The fourth capacitor C4 shown may also include a capacitance component formed by the sixth plate-shaped signal portion PS6 and the second separated ground portion SG2, which face each other with a dielectric placed therebetween.

[0123] also, Figure 5 The fifth capacitor C5 shown can be Figure 3 The multiple connections between the first capacitor C1 and the second capacitor C2 shown are formed, that is, the electrical connections between them. Figure 3 The fifth capacitor C5 formed by the first plate-shaped information portion PA1 and the second plate-shaped information portion PA2 facing each other in the first direction may correspond to Figure 5 A fifth capacitor C5 is shown.

[0124] Figure 1 The parasitic capacitance between the second linear information portion LS2 and the third linear information portion LS3 shown in FIG. Figure 5The sixth capacitor C6 shown. That is, the capacitance of the sixth capacitor C6 can be formed by the potential difference between the second linear information portion LS2 and the third linear information portion LS3. The internal parasitic capacitance component of the second linear information portion LS2 is included in the second capacitor C2, and the internal parasitic capacitance component of the third linear information portion LS3 is included in the third capacitor C3. The second and third linear information portions LS2 and LS3 mainly have inductance components, but also have capacitance components. The sixth capacitor C6 can be implemented by such a capacitance component, and the capacitance component of the sixth capacitor C6 is very small. In this way, the filter according to the present invention can be used for a resonator without removing the parasitic capacitor component.

[0125] Figure 5 The seventh capacitor C7 shown can be Figure 3 The multiple connections between the third capacitor C3 and the fourth capacitor C4 shown are formed, that is, the electrical connections between them. Figure 3 The seventh capacitor C7 formed by the fifth plate-shaped information portion PA5 and the fourth plate-shaped information portion PA2 facing each other along the first direction may correspond to Figure 5 A seventh capacitor C7 is shown.

[0126] The following will also refer to Figure 1 First to ninth inductors L1, L2, L3, L4, L5, L6, L7, L8, and L9 included in the resonators 202, 204, 206, and 208 are described.

[0127] Figure 5 The first inductor L1 shown in FIG. 1 can be connected to the first linear portion LS1 disposed on the fourth layer LY4 by connecting one end of the first linear portion LS1 disposed on the fourth layer LY4 to the Figure 1 This is achieved by short-circuiting the first plate-shaped information portion PS1 shown.

[0128] also, Figure 5 The second inductor L2 shown may be implemented by short-circuiting the second linear information portion LS2. In this case, the second inductor L2 may be implemented by connecting the second linear information portion LS2 to the third connection portion CP3 of the second plate-shaped information portion PS2.

[0129] Figure 5 The third inductor L3 shown can be implemented by short-circuiting one end of the third line-shaped information portion LS3 arranged on the second layer LY2 and the fourth plate-shaped information portion PS4.

[0130] Figure 5 The fourth inductor L4 shown can be implemented by short-circuiting one end of the fourth line-shaped information portion LS4 arranged on the fourth layer LY4 and the fifth plate-shaped information portion PS5.

[0131] The fifth inductor L5 may be implemented as a parasitic value of the fifth capacitor C5, and the seventh inductor L7 may be implemented as a parasitic value of the seventh capacitor C7. The fifth inductor L5 and the seventh inductor L7 may be implemented as a mutual inductance generated due to magnetic coupling of parasitic inductance components included in the fifth capacitor C5 and the seventh capacitor C7, and may have a very small value.

[0132] The sixth inductor L6 may be implemented as a mutual inductance generated due to magnetic coupling between the second line portion LS2 and the third line portion LS3. That is, the inductive coupling between the second resonator 204 and the third resonator 206 may be reflected in the sixth inductor L6.

[0133] Refer to Figure 1 and Figure 5 , the eighth inductor L8 has an inductance component existing between the first input / output port PT1 and the first linear portion LS1, and the ninth inductor L9 has an inductance component existing between the second input / output port PT2 and the fourth linear portion LS4.

[0134] For example, Figure 1 and Figure 2 As shown, the first input / output port PT1 may have a protruding shape extending outward from one side of the first linear information portion LS1 connected to the first plate-shaped information portion PS1, and the second input / output port PT2 may have a protruding shape extending outward from one side of the fourth linear information portion LS4 connected to the fifth plate-shaped information portion PS5. However, the present invention is not limited to any specific positions of the first and second input / output ports PT1 and PT2.

[0135] A filter according to a comparison example and a filter according to the present invention will be described below with reference to the accompanying drawings.

[0136] The filter according to the comparison example does not provide a top grounding portion 110T, and the top is open. Therefore, the noise generated inside the filter is radiated to the outside. In contrast, in the case of the filter according to the present invention, the noise inside the filter can be removed by the grounding portion.

[0137] The filter according to an embodiment of the present invention may only include Figure 1 In this case, since the number of resonators 202, 204, 206 and 208 is four, the filter according to the present invention is a fourth-order filter.

[0138] In a filter according to another embodiment of the present invention, Figure 1The unit module shown may include a plurality of unit modules arranged in an array form in at least one direction of a first direction, a second direction, or a third direction. In this case, the order of the filter according to the present invention can be increased to ten to twenty. In this way, since the filter according to the present invention has a stacked structure, the filter can be implemented as a multi-order filter and can therefore be used as a surface acoustic wave (SAW) filter and a BAR commercial filter.

[0139] In the comparison example, the size of the filter increases due to the separation between the ground portions. In contrast, in the present invention, since the ground portions are inserted into the structure, that is, since the first and second separated ground portions SG1 and SG2 are arranged on the third layer LY3 among the five layers LY1 to LY5, the size of the filter can be reduced compared to the comparison example.

[0140] Figure 6 300 is a graph for explaining the characteristics of the filter according to the present invention, wherein the horizontal axis represents frequency and the vertical axis represents insertion loss. Here, reference numeral 302 represents the characteristics of the filter according to the comparative example, and reference numeral 300 represents the characteristics of the filter according to the present invention.

[0141] The filters according to the comparison example and the present invention are both bandpass filters.

[0142] There is a reverse mutual inductance component -M between the first line information portion LS1 and the fourth line information portion LS4, and a cross-coupling is provided between the first line information portion LS1 and the fourth line information portion LS4 to arrange the stop band of the filter to a desired level.

[0143] As the mutual inductance M increases, the transmission zeros fl and fh approach the passband. The degree of connectivity can be Figure 1 The multiple fences F shown can be precisely controlled, for example, by adjusting the number of the multiple fences, so that the transmission zero points fl and fh are precisely formed in the desired frequency band.

[0144] That is to say, Figure 6 The first and second transmission zero points fl and fh shown can be determined based on the connection between the first linear information portion LS1 and the fourth linear information portion LS4, that is, the interval between the first linear information portion LS-1 and the fourth linear information portion LST and the number of multiple fences F. As the connection strength increases, the transmission zero points fl and fh approach the center frequency fc. As the number of multiple fences F increases, the connection strength decreases. That is, as the number of multiple fences F increases, the negative connection decreases, so the transmission zero points fl and fh will be away from the center frequency fc.

[0145] like Figure 1As shown, the reason why the first and fourth linear information portions LS1 and LS4 are constructed in an elongated shape is that the inductance of the first and fourth linear information portions LST and LS4 is reduced due to the negative connection. On the other hand, since the first and fourth linear information portions LS1 and LS4 are connected over a large area, the insertion loss can be reduced compared to the comparative example.

[0146] In addition, as the Figure 5 As the spacing between the plate-shaped information parts of the first to fourth capacitors C1 to C4 in the first direction increases, the capacitance of each capacitor decreases, and Figure 6 The center frequency fc shown will shift to a high frequency. Therefore, according to the present invention, the center frequency fc of the filter can be changed by adjusting the spacing between the plate-shaped information parts in the first direction.

[0147] In addition, due to Figure 5 The capacitance of the fifth to seventh capacitors C5 to C7 shown is a connection quantity, so the bandwidth of the filter will decrease as its capacitance decreases. Therefore, according to the present invention, the bandwidth of the filter can be changed by adjusting the capacitance of the fifth to seventh capacitors C5 to C7.

[0148] In addition, Figure 1 In the configuration shown, if the second linear information portion LS2 and the second plate-shaped information portion PS2 are not connected to each other through the third connection portion CP3, a horizontal connection structure may be formed on the same layer instead of a vertical connection structure, resulting in a significant increase in loss. Figure 1 As shown, since the second linear information portion LS2 and the second plate-shaped information portion PS2 are connected to each other through the third connection portion CP3, the loss can be reduced.

[0149] In addition, if the components constituting each layer are Figure 1 Arranged in the manner shown, the connections of the inductors can be reduced, which can reduce insertion losses.

[0150] Although the present disclosure has been specifically shown and described with reference to exemplary embodiments, these embodiments are presented for illustrative purposes only and do not constitute a limitation of the present disclosure, and various changes in form and details may be made to those skilled in the art without departing from the basic features of the embodiments described herein. For example, the various configurations in the above-described embodiments may be modified and applied within the scope of the present invention. In addition, differences in such modifications and applications should be deemed to fall within the scope of the present invention as defined by the appended claims.

[0151] Invention Mode

[0152] Various embodiments have been described in terms of the best mode for carrying out the present disclosure.

[0153] Industrial Applicability

[0154] The filter having a stacked structure according to the present invention can be used in various electronic products.

Claims

1. A filter having a stacked structure, the filter comprising: A plurality of grounding portions, stacked along a first direction, wherein the plurality of grounding portions are in a plate shape; a plate-shaped information portion, arranged between the plurality of ground portions and facing the plurality of ground portions along the first direction; a linear information portion disposed adjacent to at least one of the plurality of ground portions or the plate-shaped information portion in at least one of the second direction or the third direction; and a plurality of connection portions extending along the first direction to electrically connect at least two of the plurality of ground portions, the plate-shaped information portion and the line-shaped information portion to each other; The second direction intersects with the first direction, and the third direction intersects with each of the first direction and the second direction.

2. The filter having a stacked structure according to claim 1, wherein: The plurality of grounding portions include: A bottom ground portion; a top grounding portion, arranged above the bottom grounding portion along the first direction; a first inserted ground portion disposed adjacent to the top ground portion; a second inserted ground portion, disposed adjacent to the bottom ground portion; a first separation grounding portion, arranged between the first insertion grounding portion and the second insertion grounding portion along the first direction; a third insertion grounding portion, arranged adjacent to the bottom grounding portion and spaced apart from the second insertion grounding portion along the second direction; a fourth insertion ground portion disposed adjacent to the top ground portion and spaced apart from the first insertion ground portion along the second direction; and a second separation grounding portion, arranged between the third insertion grounding portion and the fourth insertion grounding portion along the first direction; wherein the first separation ground portion is conductively connected to the first insertion ground portion and the second insertion ground portion, and Wherein, the second separation grounding portion is conductively connected to the third insertion grounding portion and the fourth insertion grounding portion.

3. The filter having a stacked structure according to claim 2, wherein: The plate-shaped information portion comprises: a first plate-shaped information portion spaced apart from each of the first insertion ground portion and the first separation ground portion along the first direction and arranged between the first insertion ground portion and the first separation ground portion; a second plate-shaped information portion spaced apart from each of the first separation ground portion and the second insertion ground portion along the first direction and arranged between the first separation ground portion and the second insertion ground portion; a third plate-shaped information portion spaced apart from each of the first plate-shaped information portion and the second plate-shaped information portion in the first direction and arranged between the first plate-shaped information portion and the second plate-shaped information portion; a fourth plate-shaped information portion spaced apart from each of the third insertion ground portion and the second separation ground portion in the first direction and arranged between the third insertion ground portion and the second separation ground portion; a fifth plate-shaped information portion spaced apart from each of the fourth insertion ground portion and the second separation ground portion in the first direction and arranged between the fourth insertion ground portion and the second separation ground portion; and A sixth plate-shaped information portion is spaced apart from each of the fourth plate-shaped information portion and the fifth plate-shaped information portion in the first direction and is arranged between the fourth plate-shaped information portion and the fifth plate-shaped information portion.

4. The filter having a stacked structure according to claim 3, wherein: Each of the first to sixth plate-shaped information portions is arranged to be spaced apart from a ground portion adjacent thereto in the first direction among the plurality of ground portions, with a dielectric disposed therebetween.

5. The filter having a stacked structure according to claim 3, wherein: The first separated ground portion has a planar shape, is spaced apart from the third plate-shaped information portion and simultaneously surrounds the third plate-shaped information portion.

6. The filter having a stacked structure according to claim 3, wherein: The second separated ground portion has a planar shape, is spaced apart from the sixth plate-shaped information portion and simultaneously surrounds the sixth plate-shaped information portion.

7. The filter having a stacked structure according to claim 3, wherein: The plurality of connection parts include: a first connection portion extending along the first direction to connect the first plate-shaped information portion and the third plate-shaped information portion to each other; and A second connection portion extends along the first direction to connect the fifth plate-shaped information portion and the sixth plate-shaped information portion to each other.

8. The filter having a stacked structure according to claim 3, wherein: The linear information portion includes: a first linear information portion, arranged in a meander line shape, extending from the first plate-shaped information portion along at least one of the second direction or the third direction; A second linear information portion is arranged in a meander line shape and extends from the periphery of the first separation ground portion along at least one of the second direction or the third direction; a third linear information portion, arranged in a meander line shape, extending from the fourth plate-shaped information portion along at least one of the second direction or the third direction; and The fourth linear information portion is arranged in a meander line shape and extends from the fifth plate-shaped information portion along at least one of the second direction or the third direction.

9. The filter having a stacked structure according to claim 8, wherein: The plurality of connection portions further include a third connection portion extending along the first direction to connect the second line-shaped information portion and the second plate-shaped information portion to each other.

10. A filter having a stacked structure, the filter comprising: a top ground portion and a bottom ground portion, arranged opposite to each other while being vertically spaced apart from each other; A separation grounding portion, arranged between the top grounding portion and the bottom grounding portion; a plurality of signal components disposed between the split ground portion and each of the top ground portion and the bottom ground portion to form a resonator; as well as A connecting portion connects the separate ground portion and the plurality of signal components to each of the top ground portion and the bottom ground portion.

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