Filter for communication device and manufacturing method thereof

Abstract

The present invention relates to a filter for a communication device and a method for manufacturing the same, and more particularly, the filter for a communication device according to the present invention comprises a single base material plate made of a conductive plate material having a predetermined thickness or less and forming an inner surface of a cavity for performing frequency filtering, the cavity being formed by folding at least a portion of the base material plate, therefore, not only is the manufacturing convenient, but also the advantages of being capable of pursuing the overall ultrathin and light weight of the product can be provided.

Description

Technical Field

[0001] The present invention relates to a filter for a communication device and a manufacturing method thereof. More specifically, the present invention relates to a filter for a communication device and a manufacturing method thereof, which are integrally manufactured in a manner that each structure of a foldable single substrate plate is used to minimize insertion loss caused by the bonding process of internal structures (assuming a resonator plate including a plurality of resonators) in a cavity, and which are not only easy to manufacture but also enable ultra-thin manufacturing in the thickness direction of an antenna device product. Background Art

[0002] Radio frequency devices such as radio frequency filters (including all "communication devices") are generally composed of a connection structure of a plurality of resonators. Such a resonator is a circuit device that resonates at a specific frequency equivalently electro-circuitally through a combination of an inductor L and a capacitor C, and each resonator has a structure in which a dielectric resonance device (DR: Dielectric Resonance element) or a metal resonance device is provided inside a cavity such as a metallic cylinder or a rectangular parallelepiped surrounded by a conductor. Therefore, each resonator has a structure that can achieve high-frequency resonance by having only an electromagnetic field with an inherent frequency based on a processing frequency band inside the corresponding cavity. Generally, a multi-terminal structure is formed in which a plurality of resonant terminals are formed using a plurality of cavities and the plurality of resonant terminals are connected in sequence.

[0003] An example related to a radio frequency filter having a plurality of cavity structures is the content disclosed in Korean Patent Publication No. 10-2004-0100084 (title: "Radio Frequency Filter", publication date: December 02, 2004) previously applied for by the applicant of the present case.

[0004] However, in the existing radio frequency filter, each resonator extends in the thickness direction inside the cavity, and a part of a filter tuning cover that covers the cavity in a manner having a required bandpass and characteristics is deformed by engraving to adjust the distance from the resonator and thereby tune the frequency. There is a problem of limitation in reducing the size in the thickness direction of the completed filter.

[0005] In addition, in the existing radio frequency filter, in order to strengthen the skirt characteristics between adjacent resonators or between separated resonators in a plurality of cavities, it is necessary to provide an additional structure made of a conductor material to embody inductive coupling or capacitive coupling, and an increase in the weight of the completed filter has also become a problem.

[0006] On the other hand, in an antenna device adopting Massive MIMO (Multiple Input Multiple Output) technology recently, in order to achieve the ultra-thin manufacturing of the whole product, research is being carried out in the direction of minimizing the thickness of internal structures such as filters. For this purpose, the most commonly used type of filter can be a dielectric ceramic filter.

[0007] However, due to the characteristics of its material, the dielectric ceramic filter is directly bonded to one side of the main board or power amplifier board laminated inside the antenna housing part, so there are limitations in using it on both sides of the printed circuit board (PCB). Summary of the Invention

[0008] Technical Problem

[0009] The present invention is used to solve the above-mentioned technical problems. The object of the present invention is to provide a filter for a communication device and a manufacturing method thereof as follows, that is, the amount of insertion loss generated by the combination of two physical structures can be reduced by minimizing the existing bonding process for forming a cavity and structures such as resonators arranged in the cavity.

[0010] And another object of the present invention is to provide a filter for a communication device and a manufacturing method thereof as follows, that is, the reliability of the product is improved by strengthening the bonding rigidity of the filter formed by folding a thin substrate board with relatively low rigidity.

[0011] The object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those of ordinary skill in the art from the following description.

[0012] Technical Solution

[0013] A filter for a communication device according to an embodiment of the present invention includes a single substrate board, which is composed of a conductive material with a thickness not exceeding a specified thickness for forming the inner side surface of a cavity for performing frequency filtering, and the cavity is formed by folding at least a part of the substrate board.

[0014] Among them, the above-mentioned base substrate plate may include: a main body bottom forming plate for forming the bottom surface of the above-mentioned cavity; a lower side thickness forming plate and a lower other side thickness forming plate, which are folded along the same direction at one end and the other end in the width direction of the above-mentioned main body bottom forming plate to form a part of the above-mentioned cavity; a frequency tuning plate, the other end in the width direction is integrally connected to the folded lower other side thickness forming plate, and one end in the width direction is folded in a manner of being connected to the upper end of the folded lower side thickness forming plate, including a plurality of tuning rods formed with different single layers at a predetermined distance from a single layer formed by a plurality of resonators along the thickness direction in the above-mentioned cavity; and a main body upper forming plate, one end in the width direction is folded with the upper side thickness forming plate as a medium along the thickness direction of the above-mentioned cavity at a predetermined distance from the above-mentioned plurality of tuning rods, and the other end in the width direction is folded with the upper other side thickness forming plate as a medium, and the other end in the width direction is connected to one end in the width direction of the above-mentioned frequency tuning plate and the upper end of the above-mentioned lower other side thickness forming plate.

[0015] Moreover, the above-mentioned base substrate plate may further include a resonator plate, the resonator plate orthogonally extends with respect to the folded lower side thickness forming plate and the lower other side thickness forming plate, and includes the above-mentioned plurality of resonators forming a single layer in the above-mentioned cavity.

[0016] Moreover, the above-mentioned resonator plate may be integrally provided in a plurality of resonator plate setting ports, and the plurality of resonator plate setting ports are formed in such a way that one of the above-mentioned lower side thickness forming plate and the lower other side thickness forming plate penetrates the inside and outside of the above-mentioned cavity.

[0017] Moreover, the above-mentioned resonator plate may include: a resonator connecting rod horizontally connecting the above-mentioned plurality of resonators along the length direction of the above-mentioned cavity; a plurality of insertion ends provided at the outer ends of the above-mentioned resonator connecting rod and inserted into the above-mentioned resonator plate setting ports; and a resonance characteristic end extending from the front ends of the above-mentioned plurality of resonators respectively.

[0018] Moreover, after being inserted into the above-mentioned plurality of resonator plate setting ports, the above-mentioned plurality of insertion ends may be combined by one of a hard soldering method and a welding method.

[0019] Moreover, at least two of the above-mentioned main body bottom forming plate, the above-mentioned lower side thickness forming plate, the above-mentioned lower other side thickness forming plate, the above-mentioned resonator plate, the above-mentioned frequency tuning plate, the above-mentioned upper side thickness forming plate, the above-mentioned upper other side thickness forming plate, and the above-mentioned main body upper forming plate may be located on the same horizontal plane when fully unfolded.

[0020] Furthermore, the present invention may also include: a side shielding plate integrally formed at one end in the length direction of the bottom forming plate of the above-mentioned main body and folded, having three sides respectively connected to one end in the length direction of the lower one-side thickness forming plate in the folded state, one end in the length direction of the lower other-side thickness forming plate in the folded state, and one end in the length direction of the above-mentioned frequency tuning plate in the folded state; and another side shielding plate integrally formed at the other end in the length direction of the bottom forming plate of the above-mentioned main body and folded, having three sides respectively connected to the other end in the length direction of the lower one-side thickness forming plate in the folded state, the other end in the length direction of the lower other-side thickness forming plate in the folded state, and the other end in the length direction of the above-mentioned frequency tuning plate in the folded state.

[0021] Furthermore, the above-mentioned frequency tuning plate can be integrally formed on one of the above-mentioned lower one-side thickness forming plate and the above-mentioned lower other-side thickness forming plate where the resonator plate is combined.

[0022] Furthermore, the above-mentioned frequency tuning plate can be formed in a hollow frame shape that penetrates vertically and horizontally in a rectangular shape. In the above-mentioned frequency tuning plate, the above-mentioned multiple tuning rods can extend from the inner end on one side in the width direction to the inner end on the other side in the width direction, and can be extended in a manner of forming a single layer along the thickness direction of the above-mentioned cavity.

[0023] Furthermore, the above-mentioned frequency tuning plate can be extended in a length where the above-mentioned multiple tuning rods respectively overlap with the above-mentioned multiple resonators provided in different single layers along the thickness direction of the above-mentioned cavity.

[0024] Furthermore, a plurality of coupling adjustment rods can be further extended and formed on the above-mentioned frequency tuning plate, extending from the inner end on one side in the width direction to the inner end on the other side in the width direction, and forming the same single layer as the above-mentioned multiple tuning rods between adjacent tuning rods among the above-mentioned multiple tuning rods.

[0025] Furthermore, the above-mentioned multiple coupling adjustment rods can extend from the inner end on one side in the width direction of the above-mentioned frequency tuning plate to be connected to the inner end on the other side in the width direction.

[0026] Furthermore, pin holes penetrating vertically can be respectively formed in the above-mentioned bottom forming plate of the main body, the above-mentioned multiple resonators, and the above-mentioned upper forming plate of the main body. When folding the above-mentioned base material plate for forming the above-mentioned cavity, support pins respectively penetrating the above-mentioned pin holes can be provided.

[0027] Further, the above-mentioned base substrate can form a filter body with the above-mentioned cavity inside through a folding process. The above-mentioned filter body is disposed between a power amplifier board and an antenna board having a plurality of radiation devices disposed on the front surface. The filter for communication equipment may further include: an input connector portion for inputting a specified electrical signal transmitted from the power amplifier board to one side of the above-mentioned cavity; and an output connector portion for receiving a specified electrical signal transmitted from the other side of the above-mentioned cavity and outputting it to the above-mentioned antenna board. The above-mentioned output connector portion may include an auxiliary cover, which transmits the vertical pressure acting thereon to the power amplifier board in such a manner that the vertical pressure does not transfer to the above-mentioned filter body when the above-mentioned filter body is laminated to the front surface of the above-mentioned antenna board.

[0028] Further, the above-mentioned auxiliary cover may penetrate through both the rear portion and the front portion of the above-mentioned cavity in the thickness direction. The rear end portion may be connected to the front surface of the above-mentioned power amplifier board, and the front end portion may be connected to the rear surface of the above-mentioned antenna board.

[0029] Further, the above-mentioned auxiliary cover may be formed of a rigid material having a higher strength than the above-mentioned filter body.

[0030] Further, the above-mentioned output connector portion may further include: a plurality of welding pins extending rearward from the rear end portion of the above-mentioned auxiliary cover and inserted into the above-mentioned power amplifier board; a ground washer portion provided at the front end portion of the above-mentioned auxiliary cover to support the rear surface of the above-mentioned antenna board; and a coaxial connector provided in the hollow space of the above-mentioned auxiliary cover for electrically connecting the output end of a resonator board including a plurality of resonators disposed in the above-mentioned cavity to the above-mentioned antenna board.

[0031] Further, the above-mentioned output connector portion may be soldered after the above-mentioned plurality of welding pins are inserted into the front surface of the above-mentioned power amplifier board.

[0032] Further, a board separation portion may be formed at the rear end portion of the above-mentioned auxiliary cover. The board separation portion is formed between the above-mentioned plurality of welding pins for separating the rear portion of the above-mentioned filter body from the above-mentioned power amplifier board by a specified distance.

[0033] Further, when the above-mentioned plurality of welding pins of the above-mentioned output connector portion are inserted into the front surface of the above-mentioned power amplifier board, the above-mentioned input connector portion may be combined with the front surface of the above-mentioned power amplifier board by a surface mount technology (SMT) method.

[0034] The filter for a communication device according to another embodiment of the present invention may include a single substrate board for forming a cavity as a dielectric-filled space. The substrate board may include: a main body bottom forming board for forming the bottom surface of the cavity; a resonator board including a plurality of resonators formed in a single layer along the thickness direction within the cavity above the main body bottom forming board; a frequency tuning board including a plurality of tuning rods formed in different single layers in the cavity at a predetermined distance from the single layer formed by the plurality of resonators along the thickness direction; and a main body upper forming board provided to cover the upper part of the frequency tuning board and forming the upper surface of the cavity. The cavity may be formed by connecting the main body bottom forming board, the resonator board, the frequency tuning board, and the main body upper forming board with the lower one-side thickness forming board, the lower other-side thickness forming board, the upper one-side thickness forming board, and the upper other-side thickness forming board that are connected along the thickness direction as dielectrics and folded with each other. At least two of the main body bottom forming board, the resonator board, the frequency tuning board, and the main body upper forming board are located on the same horizontal plane when fully unfolded.

[0035] The manufacturing method of the filter for a communication device according to an embodiment of the present invention includes: a first folding step of folding the lower one-side thickness forming board and the lower other-side thickness forming board integrally connected to one end and the other end in the width direction of the main body bottom forming board along the same direction to form a part including the bottom surface of the cavity; a second folding step of folding the frequency tuning board including a plurality of tuning rods formed in a predetermined single layer along the thickness direction in the cavity after the first folding step so as to form different single layers along the thickness direction in the cavity with respect to the lower one-side thickness forming board and the lower other-side thickness forming board; and a third folding step of folding one end in the width direction of the main body upper forming board with the upper one-side thickness forming board as a dielectric at a predetermined distance from the plurality of tuning rods along the thickness direction of the cavity, folding the other end in the width direction of the main body upper forming board with the upper other-side thickness forming board as a dielectric, and folding the other end in the width direction to be connected to one end in the width direction of the frequency tuning board and the upper end of the lower other-side thickness forming board.

[0036] Effects of the Invention

[0037] According to the filter for a communication device and its manufacturing method according to an embodiment of the present invention, the following effects can be achieved.

[0038] First, as a way of constructing the structure inside the cavity, minimizing the existing bonding, soldering, or brazing methods, the present invention can be realized through a simple folding process, reducing the insertion loss caused by using the bonding method, and thus improving communication reliability.

[0039] Second, since the present invention can form a cavity using a thin base material plate with a thickness of less than 3t, the overall thickness direction dimension of the antenna device product can be reduced, thereby improving the lightweight and ultra-thinness of the product. Description of the Drawings

[0040] Figure 1 A perspective view of a filter for a communication device showing an embodiment of the present invention.

[0041] Figure 2 For separating the Figure 1 Exploded perspective view of the input port portion and the output port portion combined with the filter for a communication device in

[0042] Figure 3a And Figure 3b For exploded Figure 1 Top exploded perspective view and bottom exploded perspective view of the filter for a communication device in

[0043] Figure 4 For showing Figure 1 Developed view of the base material plate in the structure of the filter for a communication device in

[0044] Figure 5 For Figure 1 Internal perspective view of

[0045] Figure 6 For a sectional perspective view taken along the A-A line in Figure 2 in

[0046] Figure 7 Part (a) of Figure 1 is the front view of Figure 7 Part (b) of Figure 7 is a sectional view taken along the B-B line,

[0047] Figure 8 is Figure 1 Side view (a) of

[0048] Figure 9 For showing Figure 1 Perspective view of a modified example of the frequency tuning plate in the structure of

[0049] Figure 10 For explaining Figure 9 Function of the coupling adjustment rod in a modified example of the structure of

[0050] Figure 11a And Figure 11b For strengthening Figure 1Top and bottom perspective views of a filter body including an output connector portion with a rigid base substrate in a folded state in the structure.

[0051] Figure 12a and Figure 12b is Figure 11a and Figure 11b Exploded perspective view.

[0052] Figure 13 and Figure 14 Is a sectional perspective view showing the internal space of the cavity.

[0053] Figure 15 Is to show Figure 1 Partial sectional perspective view of the application state of the support pins during the folding process of the base substrate in the structure.

[0054] Figure 16 Is a cross-sectional view showing the bonding state of the filter body to the power amplifier board.

[0055] Description of reference numerals

[0056] 100: Filter for communication equipment 105: Base substrate

[0057] 110: Main body bottom forming plate 120: Lower other side thickness forming plate

[0058] 130: Lower one side thickness forming plate 140: Frequency tuning plate

[0059] 146: Tuning rod 147: Coupling adjustment rod

[0060] 150: Main body upper forming plate 151: Tuning hole

[0061] 152: Notch adjustment hole 161: Upper other side thickness forming plate

[0062] 162: Upper one side thickness forming plate 180A: One side shielding plate

[0063] 180B: The other side shielding plate 200: Resonator plate

[0064] 210: Resonator connecting rod 220: Resonator

[0065] 230: Resonator characteristic end 300A, 1300A: Input connector portion

[0066] 300B, 1300B: Output connector portion 400: Support pin

[0067] 1310B: Auxiliary cover 1320B: Welding pin

[0068] 1330B: Coaxial connector 1340B: Connection port

[0069] 1350B: Ground washer part 1360B: Plate separation part Detailed implementation mode

[0070] Hereinafter, with reference to the drawings, a filter for a communication device according to an embodiment of the present invention and a manufacturing method thereof will be described in detail.

[0071] In the process of assigning reference numerals to a plurality of structural elements in each drawing, even if they appear in different drawings, the same reference numerals are assigned to the same structural elements as much as possible. And, in the process of describing an embodiment of the present invention, if it is judged that a detailed description of a related well-known structure or function may hinder the understanding of the embodiment of the present invention, its detailed description is omitted.

[0072] In the process of describing the structural elements in the embodiment of the present invention, terms such as "first", "second", "A", "B", "a", "b", etc. may be used. These terms are only used to distinguish the corresponding structural elements from other structural elements, and the essence or order or sequence, etc. of the corresponding structural elements are not limited by their terms. And, if there is no other definition, the meanings of all terms used in this specification, including technical terms or scientific and technical terms, are the same as those generally understood by those of ordinary skill in the technical field to which the present invention belongs. Terms whose commonly used meanings are the same as those in the dictionary should be interpreted as having the same meanings as their meanings in the context of the related technology. If not clearly defined in this application, they are not interpreted as idealized or overly formalized meanings.

[0073] Figure 1 To show a perspective view of a filter for a communication device according to an embodiment of the present invention, Figure 2 For separation and Figure 1 A disassembled perspective view of the input port part and the output port part combined with the filter for a communication device in Figure 3a And Figure 3b For disassembling Figure 1 A top disassembled perspective view and a bottom disassembled perspective view of the filter for a communication device in Figure 4 To show Figure 1 An unfolded view of the base plate in the structure of the filter for a communication device in Figure 5 For Figure 1 An internal perspective view of Figure 6 For a cutaway perspective view taken along the A-A line in Figure 2 The filter for a communication device in Figure 7 Part (a) of Figure 1 Is a front view of Figure 7 Part (b) of Figure 7 Is a sectional view taken along the B-B line, and part (c) ofFigure 8 is Figure 1 The side view (a) and the sectional perspective view taken along the line C-C.

[0074] Generally, in the field of antenna technology, a filter functions to filter only the signals in a specific frequency band from the signals to be input or output during the transceiver process, so as to obtain only the signals required by consumers (users) as the result value.

[0075] To achieve such signal filtering, as can be known from the name, a cavity filter forms a cavity, which is a specified signal filtering interval, between the input port part for input signals and the output port part for output signals, and obtains the frequency signal value of the specific frequency band in the interval required by consumers through the frequency tuning process via the cavity.

[0076] However, so far, in the same industry of manufacturing antenna devices, to manufacture a cavity filter, the above-mentioned cavity is manufactured by processing the inside of a filter body made of a ceramic material or a more rigid material with higher strength. After separately manufacturing the necessary structures for frequency filtering such as a plurality of resonators, etc., and fixing them inside the cavity, only this method has been disclosed.

[0077] However, the filter 100 for a communication device according to an embodiment of the present invention does not adopt the above-mentioned manufacturing method. After processing a single flat base material plate with a thickness not exceeding a specified thickness into a sheet metal form through a stamping process, a structure (assuming a resonator plate 200 including a plurality of resonators 220) inside the cavity that can minimize the insertion loss during combination can be provided through a folding process. This is the innovative technical feature of the present invention.

[0078] As Figures 1 to 4 shown, the filter 100 for a communication device according to an embodiment of the present invention is manufactured in an unfolded state, and includes a base material plate 105 that forms a cavity C inside when folded.

[0079] Among them, the base material plate 105 can be made of a conductive plate material with a thickness below a specified thickness that forms the inner side surface of the cavity C, which is a dielectric filling space for performing frequency filtering. The specified thickness in this case is the thickness that can form a cavity through a folding process and can firmly maintain the formed cavity, and is preferably 3t or less to prevent the weight from increasing.

[0080] On the other hand, the cavity C can be formed by folding at least a part of the base material plate 105 (folding process).

[0081] For this purpose, as Figures 1 to 4As shown, in the filter 100 for a communication device according to an embodiment of the present invention, the base substrate 105 includes: a main body bottom forming plate 110, a lower side thickness forming plate 130, a lower other side thickness forming plate 120, a frequency tuning plate 140, and a main body upper forming plate 150.

[0082] Hereinafter, for the sake of convenience of explanation, terms such as "space" and "position" are described on the premise of the cavity C formed after folding the base substrate 105. Before folding the base substrate 105, the above structures are all in a developed view form on the same plane and can be formed into a sheet metal form through a stamping process. This also applies to the filter 100' for a communication device according to another embodiment of the present invention described later.

[0083] More specifically, the main body bottom forming plate 110 is a structure for forming the bottom surface of the folded cavity C, and can form one side connector setting holes 115A and the other side connector setting holes 115B for connecting and setting the input connector portion 300A and the output connector portion 300B described later in a manner communicating with the cavity C.

[0084] The lower side thickness forming plate 130 and the lower other side thickness forming plate 120 are respectively folded orthogonally at the width direction ends of the rectangular main body bottom forming plate 110 extending along the length direction to form one side wall in the width direction of the cavity C and form one side thickness in the width direction, and form the other side wall in the width direction and form the other side thickness in the width direction.

[0085] Among them, the sizes of the lower side thickness forming plate 130 and the lower other side thickness forming plate 120 are smaller than the width direction size of the main body bottom forming plate 110. In order to further reduce the space occupied by the thickness in the front-rear direction when stacked and arranged in an antenna cover portion (not shown), it is preferably formed in an ultra-thin form with a thickness direction size smaller than the width direction size.

[0086] On the other hand, the frequency tuning plate 140 is folded in such a way that the other end in the width direction is connected to the upper end of the folded lower side thickness forming plate 130, and includes a plurality of tuning rods 146 that form different single layers at a predetermined distance from the single layer formed by a plurality of resonators 220 described later along the thickness direction in the cavity C.

[0087] That is, as Figure 4 shown, the frequency tuning plate 140 extends integrally with respect to the lower other side thickness forming plate 120 in the unfolded state, and when folded, can be folded in a manner of orthogonally bending toward the inner direction where the cavity C is formed.

[0088] Among them, except for the edge ends formed along the edge of the frequency tuning plate 140, a rectangular shape penetrates vertically to form a quadrilateral frame shape with an internal cavity. On this premise, a plurality of tuning rods 146 formed on the frequency tuning plate 140 extend from the inside of one of the end portions on the width direction side and the other end portion of the cavity C (in an embodiment of the present invention, it represents the end portion on the width direction side adjacent to the lower side thickness forming plate 130), so as to protrude and extend with a specified length in a manner of maintaining horizontal toward the other end portion in the width direction, and can be separated by a specified length along the length direction of the cavity C respectively.

[0089] The frequency tuning plate 140 as described above can extend in a length such that a plurality of tuning rods 146 respectively overlap with a plurality of resonators 220 provided in different single layers along the thickness direction of the cavity C.

[0090] On the other hand, as Figure 4 shown, the frequency tuning plate 140 may further include: an L-shaped notch portion 141, which forms a notch based on inductive coupling (hereinafter referred to as an "L-shaped notch") at the right end (high-frequency region) of the passband; and a C-shaped notch portion 142, which forms a notch based on capacitive coupling (hereinafter referred to as a "C-shaped notch") at the left end (low-frequency region) of the passband.

[0091] The L-shaped notch portion 141 and the C-shaped notch portion 142 form the same single layer with respect to the thickness direction of the cavity C, and can form the same single layer with a plurality of tuning rods 146 already formed on the frequency tuning plate 140. However, the L-shaped notch portion 141 and the C-shaped notch portion 142 can form a single layer different from a plurality of resonators 220 of a resonator plate 200 to be described later in the cavity C.

[0092] Furthermore, as Figure 4 shown, a plurality of coupling adjustment rods 147 can also be formed on the frequency tuning plate 140, formed inside the end portion on the width direction side, and located between a plurality of tuning rods 146 formed at a specified distance along the length direction.

[0093] The plurality of coupling adjustment rods 147 are located between a plurality of resonators 220 formed on a resonator plate 200 to be described later in a varying shape, so as to act on the coupling value between adjacent plurality of resonators 220.

[0094] On the other hand, one-side setting ribs 149A and the other-side setting ribs 149B protruding outward can also be formed at both ends in the length direction of the frequency tuning plate 140, and are supported along the thickness direction of the cavity C by being interfered by a one-side shielding plate 180A and the other-side shielding plate 180B to be described later.

[0095] Moreover, the upper body forming plate 150 is folded in such a way as to shield the upper surface of the cavity C and be separated from the outside, and functions to form the upper inner side surface of the cavity C.

[0096] Among them, the upper body forming plate 150 can be arranged in parallel on the upper part in such a way as to be separated from the frequency tuning plate 140 by a predetermined distance after being folded and configured to form at least a single layer in the cavity C.

[0097] For this purpose, an upper one-side thickness forming plate 161 for connection is integrally formed between one end in the width direction of the upper body forming plate 150 and the frequency tuning plate 140, and an upper other-side thickness forming plate 162 is integrally formed at the other end in the width direction of the upper body forming plate 150.

[0098] The upper one-side thickness forming plate 161 is folded upward in a direction orthogonal to the inner side direction of one end in the width direction of the frequency tuning plate 140, and the upper other-side thickness forming plate 162 is folded downward in a direction orthogonal to the inner side direction of the other end in the width direction of the upper body forming plate 150, and its lower end can be connected to the upper end of the lower other-side thickness forming plate 120.

[0099] On the other hand, in the filter 100 for a communication device according to an embodiment of the present invention, the substrate plate 105 may further include a resonator plate 200 provided with a plurality of resonators 220.

[0100] The resonator plate 200 is provided separately, and a plurality of resonator plate setting ports 129h formed in one of the lower one-side thickness forming plate 130 and the lower other-side thickness forming plate 120 of the substrate plate 105 are used as a medium to be able to form a single layer and be combined in such a way as to be separated from the single layer formed by the plurality of tuning rods 146 of the frequency tuning plate 140 along the thickness direction.

[0101] More specifically, as Figures 1 to 4 shown, the resonator plate 200 may include a plurality of resonators 220, which orthogonally fold and extend toward the inner side direction with respect to the folded lower one-side thickness forming plate 130 and the lower other-side thickness forming plate 120 to form a single layer in the cavity C.

[0102] The resonator plate 200 can be combined and arranged in a plurality of resonator plate setting ports 129h, and the plurality of resonator plate setting ports 129h penetrate one of the lower one-side thickness forming plate 130 and the lower other-side thickness forming plate 120 in such a way as to penetrate the inside and outside of the cavity C.

[0103] Among them, as Figure 3aAs shown, the resonator plate 200 may include: a resonator connecting rod 210 that horizontally connects a plurality of resonators 220 along the length direction of the cavity C; a plurality of insertion ends 215 provided at the outer ends of the resonator connecting rod 210 and inserted into the resonator plate setting opening 129h; and a resonance characteristic end 230 extending and formed at the front end of each of the plurality of resonators 220.

[0104] On the other hand, the plurality of insertion ends 215 provided at the outer ends of the resonator connecting rod 210 can be combined by one of a brazing method and a welding method after being inserted into the plurality of resonator plate setting openings 129h from the inside of the cavity C where they are provided.

[0105] Among them, as Figures 1 to 4 shown, the base material plate 105 may further include: a first shielding plate 180A integrally formed at one end in the length direction of the main body bottom forming plate 110 and folded, having three sides respectively connected to one end in the length direction of the lower one-side thickness forming plate 130 in the folded state, one end in the length direction of the lower other-side thickness forming plate 120 in the folded state, and one end in the length direction of the frequency tuning plate 200 in the folded state; and a second shielding plate 180B integrally formed at the other end in the length direction of the main body bottom forming plate 110 and folded, having three sides respectively connected to the other end in the length direction of the lower one-side thickness forming plate 130 in the folded state, the other end in the length direction of the lower other-side thickness forming plate 120 in the folded state, and the other end in the length direction of the frequency tuning plate 140 in the folded state.

[0106] On the other hand, as Figures 1 to 4 shown, a first rib through hole 189A and a second rib through hole 189B for inserting a first set rib 149A and a second set rib 149B formed at both ends in the length direction of the frequency tuning plate 140 may be formed in the first shielding plate 180A and the second shielding plate 180B.

[0107] In the filter 100 for a communication device according to an embodiment of the present invention, in the folded state, the vertical cross-sectional shape of the base material plate 105 includes a rectangle formed by the surface occupied by the main body bottom forming plate 110. From this point, the first shielding plate 180A and the second shielding plate 180B are defined as having three sides, but are not limited thereto, and can be understood as the sides corresponding to the vertical cross-sectional shape formed by the cavity C. Assuming that the vertical cross-sectional shape of the cavity C is a triangle, the first shielding plate 180A and the second shielding plate 180B have two sides in a triangular shape excluding the side (surface) occupied by the main body bottom forming plate 110.

[0108] Figure 9 To show Figure 1Stereogram of a deformation example of a frequency tuning plate in the structure Figure 10 For the purpose of illustration Figure 9 Side cross-sectional view showing the function of the coupling adjustment rod of the deformation example in the structure

[0109] As described above, a plurality of coupling adjustment rods 147 may also be formed extending from the inner end on one side in the width direction to the inner end on the other side in the width direction of the frequency tuning plate 140, and may form the same single layer with the plurality of tuning rods 146 between adjacent tuning rods among the plurality of tuning rods 146

[0110] Among them Figures 5 to 8 The plurality of coupling adjustment rods 147 shown extend from the inner end of the end on one side in the width direction of the frequency tuning plate 140, and the extension degree does not exceed the front ends of the plurality of tuning rods 146 at least, but as Figure 9 And Figure 10 Shown, the plurality of coupling adjustment rods 147 formed on the frequency tuning plate 140 of the deformation example extend from the inner end of the end on one side in the width direction of the frequency tuning plate 140 to be connected to the inner end of the end on the other side in the width direction

[0111] As Figure 10 Shown, the coupling adjustment rod 147 of the frequency tuning plate 140 of the deformation example as described above can be shaped by the designer who tunes the fine frequency in the cavity C from the upper part in the thickness direction of the cavity C to the lower side, so as to interfere between adjacent plurality of resonators 220 in the signal flow path, thereby playing a role in adjusting the coupling value

[0112] On the other hand, as Figures 1 to 8 Shown, the filter 100 for a communication device according to an embodiment of the present invention may further include a plurality of tuning holes 151 and notch adjustment holes 152 formed in the main body upper forming plate 150 in a manner communicating with the cavity C

[0113] The plurality of tuning holes 151 are formed at corresponding positions on the plurality of tuning rods 146 provided inside the cavity C. By inserting a specified tuning tool (not shown) through the plurality of tuning rods 146, the shape of the plurality of tuning rods 146 is changed, thereby adjusting the separation distance from the plurality of resonators provided in different single layers, so as to achieve fine frequency tuning

[0114] And, the plurality of notch adjustment holes 152 are at positions corresponding to the L-shaped notch portion 141 and the C-shaped notch portion 142 provided in a manner of forming a single layer inside the cavity C. By inserting a specified coupling adjustment tool (not shown) through the plurality of notch adjustment holes 152, the shape of one of the L-shaped notch portion 141 and the C-shaped notch portion 142 is changed to make the notch of the required passband reach the design value

[0115] Figure 11a AndFigure 11b The top and bottom perspective views of a filter body including an output connector portion for enhancing the rigidity of a base substrate in a folded state in a structure to be used, Figure 1 and the exploded perspective views of Figure 12a and Figure 12b For Figure 11a and Figure 11b The exploded perspective view of Figure 13 and Figure 14 The sectional perspective view showing the internal space of the cavity, Figure 15 For showing Figure 1 The partial sectional perspective view showing the application state of the support pins during the folding process of the base substrate in the structure of Figure 16 The cross-sectional view showing the bonding state of the filter body to the power amplifier board.

[0116] Referring to Figure 11a and Figures 11b to 16 , in the filter 100 for a communication device according to an embodiment of the present invention, the base substrate 105 forms a filter body having the above-described cavity C inside through a folding process, and the filter body is disposed between the power amplifier board PCB and an antenna board (not shown) having a plurality of radiating devices disposed on the front surface. It may further include: input connector portions 300A, 1300A for inputting a predetermined electrical signal transmitted from the power amplifier board PCB to one side of the cavity C; and output connector portions 300B, 1300B for receiving a predetermined electrical signal transmitted from the other side of the cavity C and outputting it to the antenna board.

[0117] As Figure 12b shown, the input connector portions 300A, 1300A may include: a Teflon portion 1310A mounted on the input connector setting hole 115A; and a connection pin 1330A connected to one of the plurality of resonators 200 inside the cavity C by passing through the Teflon portion 1310A.

[0118] On the other hand, the output connector portions 300B, 1300B can also be formed in the same structure as the input connector portions 300A, 1300A, but as will be described later, they can be deformed and arranged in a form that minimizes the transmission of external force between the antenna board and the filter body.

[0119] More specifically, as Figure 11a and Figures 11b to 16 shown, the output connector portion 1300B may include an auxiliary outer cover 1310B that transmits the vertical pressure applied during the laminating bonding of the filter body to the front surface of the antenna board to the power amplifier board PCB in a manner that does not transmit to the filter body.

[0120] The auxiliary outer cover 1310B penetrates through both the rear part and the front part of the cavity C in the thickness direction (in the case where the antenna board is located in the front and the power amplifier board PCB is located in the rear), the rear end is connected to the front surface of the power amplifier board PCB, and the front end is connected to the rear surface of the antenna board. Among them, the auxiliary outer cover 1310B can form a hollow cylindrical shape, but is not limited thereto.

[0121] And, preferably, the auxiliary outer cover 1310B is formed of a rigid material with a strength higher than that of the filter body.

[0122] Therefore, during the process of laminating and bonding the antenna board to the front surface of the filter body, the external force transmitted from an assembler or an automatic assembly jig, etc. will not be transmitted to the filter body which is relatively thin (below 3t) and has poor rigidity due to ultra-thinning, but the external force will be directly transmitted to the power amplifier board PCB, thus providing the advantage of preventing shape deformation, etc. during assembly.

[0123] Among them, the output connector part 1300B may include: a plurality of welding pins 1320B, extending rearward from the rear end of the auxiliary outer cover 1310B to be inserted into the power amplifier board PCB; a ground washer part 1350B, arranged at the front end of the auxiliary outer cover 1310B to support the rear surface of the antenna board; and a coaxial connector 1330B, arranged in the hollow space of the auxiliary outer cover 1310B for electrically connecting the output end 240 of the resonator board 220 including a plurality of resonators 220 arranged in the cavity C to the antenna board.

[0124] The coaxial connector 1330B includes a terminal pin (not marked) for electrically connecting to the antenna board, and a connection port 1340B for inserting and arranging the output end 240 of the resonator board 220 can be formed in the auxiliary outer cover 1310B in a communicating manner.

[0125] On the other hand, as Figure 16 shown, the output connector part 1300B will be soldered and bonded after the plurality of welding pins 1320B are inserted into the front surface of the power amplifier board PCB.

[0126] Among them, as Figure 16 shown, a board separation part 1360B can be formed at the rear end of the auxiliary outer cover 1310B, and the board separation part 1360B is formed between the plurality of welding pins 1320B for separating the rear part of the filter body from the power amplifier board PCB by a predetermined distance.

[0127] Therefore, the filter body and the power amplifier board PCB will be separated by the board separation part 1360B (refer to Figure 16The attached drawing reference numeral “L” in ) can provide the advantage that both sides of the power amplifier board PCB provided in a common printed circuit board can be applied in an unrestricted manner.

[0128] On the other hand, preferably, when the plurality of soldering pins 1320B of the output connector portion 1300B are inserted into the front surface of the power amplifier board PCB, the input connector portion 1300A is combined with the front surface of the power amplifier board PCB by means of surface mounting technology.

[0129] On the other hand, as Figure 15 shown, pin holes 116h, 236h, and 156h penetrating in the vertical direction can be respectively formed in the board 110 formed at the bottom of the main body, the plurality of resonators 220, and the board 150 formed at the upper part of the main body. When folding the base board 1105 for forming the cavity C, the support pins 400 penetrating through the respective pin holes 116h, 236h, and 156h can be provided. That is, after the support pins 400 are inserted into the respective pin holes 116h, 236h, and 156h in such a manner that each part is folded to an accurate position during the folding process, they are removed after the folding process is completed, so as not to affect the frequency filtering and tuning in the cavity C.

[0130] The manufacturing method of the filter for a communication device according to an embodiment of the present invention will be described as follows.

[0131] That is, as Figures 1 to 16 shown, the manufacturing method of the filter for a communication device according to an embodiment of the present invention includes: a first folding step of folding the lower side thickness forming plate 130 and the lower other side thickness forming plate 120 integrally connected to one end and the other end in the width direction of the main body bottom forming plate 110 along the same direction so as to form a part including the bottom surface portion of the cavity C; a second folding step of folding the frequency tuning plate 140 including a plurality of tuning rods 146 forming a prescribed single layer in the thickness direction in the cavity C in such a manner that different single layers are formed with the plurality of resonators 220 extending orthogonally to the lower side thickness forming plate 130 and the lower other side thickness forming plate 120 in the thickness direction after the first folding step; and a third folding step of folding one end in the width direction of the main body upper forming plate 150 with the upper side thickness forming plate 162 as a medium and folding the other end in the width direction of the main body upper forming plate 150 with the upper other side thickness forming plate 161 as a medium at a prescribed distance from the plurality of tuning rods 146 in the thickness direction of the cavity C, and folding the other end in the width direction so as to be connected to one end in the width direction of the frequency tuning plate 140 and the upper end of the lower other side thickness forming plate 120.

[0132] It can be confirmed that the detailed folding process of the remaining structure can be referred to Figure 4 and additionally executed.

[0133] As described above in detail with reference to the accompanying drawings, a filter for a communication device and a manufacturing method thereof according to an embodiment of the present invention have been described. However, the embodiments of the present invention are not limited to the above-described one embodiment, and various modifications can be made by those of ordinary skill in the technical field to which the present invention pertains, and it is natural that they can be implemented within an equivalent range. Therefore, the true scope of the rights of the present invention is defined by the appended claims for protection of the invention.

[0134] Industrial applicability

[0135] The present invention provides a filter for a communication device and a manufacturing method thereof as follows, that is, by minimizing an existing bonding process for forming a cavity and for disposing structures such as resonators in the cavity, the amount of insertion loss generated due to the bonding of two physical structures can be reduced.

Claims

1. A filter for a communication device, characterized in that it includes a single base plate made of a conductive plate material with a thickness below a specified thickness that forms the inner side surface of a cavity for performing frequency filtering, and the cavity is formed by folding at least a part of the base plate.

2. The filter for a communication device according to claim 1, characterized in that, The base plate includes: a main body bottom forming plate for forming the bottom surface of the cavity; a lower side thickness forming plate and a lower opposite side thickness forming plate that are folded along the same direction at one end and the other end in the width direction of the main body bottom forming plate to form a part of the cavity; a frequency tuning plate, the other end in the width direction is integrally connected to the folded lower opposite side thickness forming plate, and the one end in the width direction is folded in a manner connected to the upper end of the folded lower side thickness forming plate, and includes a plurality of tuning rods that form different single layers at a specified distance along the thickness direction in the cavity from a single layer formed by a plurality of resonators; and a main body upper forming plate that is folded with the upper side thickness forming plate as a medium at one end in the width direction at a specified distance along the thickness direction of the cavity from the plurality of tuning rods, and is folded with the upper opposite side thickness forming plate as a medium at the other end in the width direction, and the other end in the width direction is connected to the one end in the width direction of the frequency tuning plate and the upper end of the folded lower opposite side thickness forming plate.

3. The filter for a communication device according to claim 2, characterized in that, The base plate further includes a resonator plate that orthogonally extends with respect to the folded lower side thickness forming plate and the lower opposite side thickness forming plate, and includes the plurality of resonators that form a single layer in the cavity.

4. The filter for a communication device according to claim 3, wherein, The resonator plate is combined and arranged at a plurality of resonator plate setting ports, and the plurality of resonator plate setting ports are formed in a manner that one of the lower side thickness forming plate and the lower opposite side thickness forming plate penetrates the inside and outside of the cavity.

5. The filter for a communication device according to claim 4, wherein, The resonator plate includes: a resonator connecting rod that horizontally connects the plurality of resonators along the length direction of the cavity; a plurality of insertion ends provided at the outer ends of the resonator connecting rod and inserted into the resonator plate setting ports; and resonant characteristic ends that extend and are formed at the front ends of the plurality of resonators respectively.

6. The filter for a communication device according to claim 6, characterized in that, After the plurality of insertion ends are inserted into the plurality of resonator plate setting ports, they are combined by one of a hard soldering method and a welding method.

7. The filter for a communication device according to claim 2, wherein At least two of the main body bottom forming plate, the lower side thickness forming plate, the lower opposite side thickness forming plate, the resonator plate, the frequency tuning plate, the upper side thickness forming plate, the upper opposite side thickness forming plate, and the main body upper forming plate are located on the same horizontal plane when fully unfolded.

8. The filter for a communication device according to claim 2, wherein, It further includes: a side shielding plate that is integrally formed at one end in the length direction of the main body bottom forming plate and is folded, and has three sides respectively connected to the one end in the length direction of the folded lower side thickness forming plate, the one end in the length direction of the folded lower opposite side thickness forming plate, and the one end in the length direction of the folded frequency tuning plate; and The other shielding plate is integrally formed at the other end in the longitudinal direction of the bottom forming plate of the above-mentioned main body and is folded, and has three sides respectively connected to the other end in the longitudinal direction of the lower one-side thickness forming plate in the folded state, the other end in the longitudinal direction of the lower other-side thickness forming plate in the folded state, and the other end in the longitudinal direction of the above-mentioned frequency tuning plate in the folded state.

9. The filter for a communication device according to claim 2, wherein The above-mentioned frequency tuning plate is integrally formed on one of the lower one-side thickness forming plate and the lower other-side thickness forming plate that combines the resonator plate.

10. The filter for a communication device according to claim 9, wherein The above-mentioned frequency tuning plate is formed in the shape of a hollow frame that penetrates vertically in a rectangular shape. In the above-mentioned frequency tuning plate, the above-mentioned plurality of tuning rods extend from the inner end on one side in the width direction to the inner end on the other side in the width direction, and extend in such a way as to form a single layer along the thickness direction of the above-mentioned cavity.

11. The filter for a communication device according to claim 10, characterized in that, The above-mentioned frequency tuning plate extends in length such that the above-mentioned plurality of tuning rods respectively overlap with the above-mentioned plurality of resonators provided in different single layers along the thickness direction of the above-mentioned cavity.

12. The filter for a communication device according to claim 10, wherein In the above-mentioned frequency tuning plate, a plurality of coupling adjustment rods are also formed and extend from the inner end on one side in the width direction to the inner end on the other side in the width direction, and form the same single layer as the above-mentioned plurality of tuning rods between adjacent tuning rods among the above-mentioned plurality of tuning rods.

13. The filter for a communication device according to claim 12, wherein The above-mentioned plurality of coupling adjustment rods extend from the inner end on one side in the width direction of the above-mentioned frequency tuning plate to connect to the inner end on the other side in the width direction.

14. The filter for a communication device according to claim 11, wherein Pin holes that penetrate vertically are respectively formed in the above-mentioned main body bottom forming plate, the above-mentioned plurality of resonators, and the above-mentioned main body upper forming plate. When folding the above-mentioned base material plate for forming the above-mentioned cavity, support pins that respectively penetrate the above-mentioned pin holes can be provided.

15. The filter for a communication device according to claim 2, wherein The above-mentioned base material plate forms a filter main body with the above-mentioned cavity inside through a folding process, and the filter main body is arranged between a power amplifier board and an antenna board having a plurality of radiation devices arranged on the front surface. The above-mentioned filter for a communication device further includes: An input connector portion for inputting a specified electrical signal transmitted from the above-mentioned power amplifier board to one side of the above-mentioned cavity; and An output connector portion for receiving a specified electrical signal transmitted from the other side of the above-mentioned cavity and outputting it to the above-mentioned antenna board. The above-mentioned output connector portion includes an auxiliary outer cover, which transmits the vertical pressure exerted when the filter main body is laminated on the front surface of the above-mentioned antenna board to the above-mentioned power amplifier board in such a way that it is not transmitted to the above-mentioned filter main body.

16. The filter for a communication device according to claim 15, characterized in that, The above-mentioned auxiliary outer cover penetrates both the rear portion and the front portion of the above-mentioned cavity in the thickness direction, the rear end portion is connected to the front surface of the above-mentioned power amplifier board, and the front end portion is connected to the rear surface of the above-mentioned antenna board.

17. The filter for a communication device according to claim 15, wherein The above-mentioned auxiliary outer cover is formed of a rigid material having a higher strength than the above-mentioned filter main body.

18. The filter for a communication device according to claim 17, wherein The above-mentioned output connector portion further includes: A plurality of welding pins that extend rearward from the rear end portion of the above-mentioned auxiliary outer cover and are inserted into the above-mentioned power amplifier board. A ground washer portion is provided at the front end of the auxiliary outer cover to support the rear surface of the antenna board; and A coaxial connector is provided in the hollow space of the auxiliary outer cover for electrically connecting the output end of a resonator board including a plurality of resonators provided in the cavity to the antenna board.

19. The filter for a communication device according to claim 18, characterized in that, The output connector portion is soldered after the plurality of soldering pins are inserted into the front surface of the power amplifier board.

20. The filter for a communication device according to claim 18, wherein A board separation portion is formed at the rear end of the auxiliary outer cover, and the board separation portion is formed between the plurality of soldering pins for separating a rear surface portion of the filter body from the power amplifier board by a predetermined distance.

21. The filter for a communication device according to claim 18, characterized in that, When the plurality of soldering pins of the output connector portion are inserted into the front surface of the power amplifier board, the input connector portion is combined with the front surface of the power amplifier board by a surface mounting technology method.

22. A filter for a communication device, characterized in that It includes a single base plate for forming a cavity as a dielectric-filled space, The base plate includes: A main body bottom forming plate for forming the bottom surface portion of the cavity; A resonator board including a plurality of resonators formed in a single layer along the thickness direction in the cavity corresponding to the upper part of the main body bottom forming plate; A frequency tuning board including a plurality of tuning rods formed in different single layers in the cavity in a manner separated from the single layer formed by the plurality of resonators by a predetermined distance along the thickness direction; and A main body upper forming plate is provided to cover the upper part of the frequency tuning board to form the upper surface portion of the cavity, The cavity is formed by connecting the main body bottom forming plate, the resonator board, the frequency tuning board, and the main body upper forming plate with a lower side thickness forming plate, a lower side thickness forming plate, an upper side thickness forming plate, and an upper side thickness forming plate that are respectively connected along the thickness direction as dielectrics and are folded with each other. At least two of the main body bottom forming plate, the resonator board, the frequency tuning board, and the main body upper forming plate are located on the same horizontal plane when fully unfolded.

23. A manufacturing method of a filter for a communication device, characterized in that, It includes: A first folding step of folding the lower side thickness forming plate and the lower side thickness forming plate integrally connected to one end and the other end in the width direction of the main body bottom forming plate along the same direction to form a part including the bottom surface portion of the cavity; A second folding step of folding a frequency tuning board including a plurality of tuning rods formed in a predetermined single layer along the thickness direction in the cavity in a manner of forming different single layers along the thickness direction in the cavity with respect to the lower side thickness forming plate and the lower side thickness forming plate after the first folding step; And Third folding step: With respect to the thickness direction of the above-described cavity, the upper one-side thickness forming plate is used as one end in the width direction of the upper forming plate of the dielectric folding body, and the upper other-side thickness forming plate is used as the other end in the width direction of the upper forming plate of the dielectric folding body, and the other end in the width direction is folded in a manner that connects to one end in the width direction of the above-described frequency tuning plate and the upper end of the lower other-side thickness forming plate.

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