Communications equipment filters

Abstract

The advantages of this type of connector include ease of slim manufacturing, reduced insertion loss, and improved resonance characteristics. The filter for a communication device includes a base plate made of a conductive material that is manufactured in an unfolded state and foldable to form a cavity therein and to position a plurality of resonators protruding a predetermined length in a thickness direction or width direction within the cavity when folded. The plurality of resonators include resonant characteristic ends that are flat and wider so that their tips form the same layer as other parts within the cavity.

Description

[Technical Field]

[0001] The present invention relates to a filter for communication devices, and more particularly to a filter for communication devices that is easy to manufacture, easily ensures usable area on a main board (or PA board), and prevents an increase in the size of the entire antenna device in the thickness direction. [Background technology]

[0002] Radio frequency devices (including all "communications devices") such as radio frequency filters are typically constructed with a structure in which multiple resonators are connected. Such resonators are circuit elements that resonate at a specific frequency by combining an inductor (L) and a capacitor (C) in an equivalent electronic circuit. Each resonator has a structure in which a dielectric resonance element (DR) or a metal resonance element is provided inside a cavity such as a metallic cylinder or rectangular parallelepiped surrounded by a conductor. As a result, each resonator has a structure that enables high-frequency resonance by allowing only an electromagnetic field of a natural frequency according to the processing frequency band to exist within the cavity. Typically, multiple resonant ends are formed using multiple cavities, and a multi-stage structure is formed in which the multiple resonant ends are connected in sequence.

[0003] An example of a radio frequency filter having a multiple cavity structure is disclosed in Korean Patent Publication No. 10-2004-0100084 (title: "Radio Frequency Filter", publication date: December 2, 2004), which was filed earlier by the applicant of the present application.

[0004] However, in conventional radio frequency filters, each resonator extends in the thickness direction within the cavity, and the distance between the resonators is tuned by deforming a part of the filter tuning cover covering the cavity using a stamping method to achieve desired bandpass characteristics. However, this method has a problem of very limited size reduction in the thickness direction of the completed filter.

[0005] Furthermore, conventional radio frequency filters require the installation of additional conductive material structures to achieve inductive or capacitive coupling as part of strengthening the skirt characteristics between adjacent or distant resonators in multiple cavities, but this has been pointed out as a problem in that the weight of the completed filter increases significantly.

[0006] Meanwhile, in recent years, in antenna devices to which Massive MIMO (Multiple Input-Multiple Output) technology is applied, research is being conducted to minimize the thickness of internal components such as filters in order to slim down the entire product, and the most commonly used type of filter for this purpose is a dielectric ceramic filter.

[0007] However, due to the characteristics of the material, dielectric ceramic filters are bonded directly to one side of the main board (or PA board) stacked inside the antenna housing, which means that they are limited to being used on both sides of the PCB (printed circuit board). Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made to solve the above-mentioned technical problems, and aims to provide a filter for a communication device that can reduce the amount of insertion loss caused by coupling two physical structures, without the conventional bonding process for forming a cavity and providing a structure such as a resonator in the cavity.

[0009] Another object of the present invention is to provide a filter for a communication device in which the resonance characteristic ends of a plurality of resonators provided in a cavity can be easily manufactured by a folding method.

[0010] The technical problems of the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0011] A filter for a communication device according to one embodiment of the present invention includes a base plate made of a conductive material that is manufactured in an unfolded state and is foldable so that, when folded, a cavity is formed therein and a plurality of resonators are positioned within the cavity, protruding a predetermined length in a thickness direction or width direction. The plurality of resonators include resonant characteristic ends that are flat and wider so that their tips form the same layer as other parts within the cavity.

[0012] At least one of the plurality of resonators may be integrally formed with an input terminal pin connected to the input port so that a signal transmitted from the input port is input, and at least another of the plurality of resonators may be integrally formed with an output terminal pin connected to the output port so that a signal is transmitted to and output from the output port.

[0013] The resonant characteristic ends of the plurality of resonators may be integrally extended to form an angular tip at the other portion.

[0014] The resonant characteristic ends of the plurality of resonators may be integrally extended in a round shape from the tip of the other portion.

[0015] The resonant characteristic ends of the plurality of resonators may be integrally extended to form a "U" shape surrounding the tip of the other part.

[0016] In addition, the base plate may be made of either a conductive material or a non-conductive material, and if the base plate is made of a non-conductive material, a conductive material may be coated on at least the inside corresponding to the cavity by plating.

[0017] The cavity may also be filled with air, which has a dielectric constant of 1.

[0018] In addition, the base plate after folding may include a body bottom forming panel that forms the bottom portion of the cavity, one side thickness forming panel and another side thickness forming panel that increase the thickness dimension of the cavity, a resonator panel having a plurality of resonators protruding into the cavity corresponding to the upper part of the body bottom forming panel, and a body upper forming panel that is formed in a shape that covers the upper part of the cavity.

[0019] In addition, the base plate after folding may further include one-side and other-side shielding panels for shielding one and other longitudinal ends of the cavity.

[0020] In addition, the base plate after folding may further include a notch forming panel provided between the body upper forming panel and the plurality of resonators of the resonator panel.

[0021] In addition, at least one of the plurality of resonators may be integrally formed with an input terminal pin connected to an input port so that a signal transmitted from the input port is input, and at least another of the plurality of resonators may be integrally formed with an output terminal pin connected to an output port so that a signal is transmitted to the output port and output, and the body bottom forming panel may be formed with input port mounting portions and output port mounting portions, each having a boss shape penetrating vertically, through which the input terminal pin or the output terminal pin is inserted, and fixing protrusions having a stud or serration protrusion shape for fixing Teflon (registered trademark) may be formed on inner surfaces of the holes of the input port mounting portion and the output port mounting portion. [Effects of the Invention]

[0022] According to the filter for a communication device of the present invention, the structure within the cavity can be constructed by a simple folding process without using the conventional joining (welding or brazing) method, thereby reducing insertion loss that occurs when a joining method is used, thereby improving communication reliability.

[0023] Furthermore, since the present invention can form a cavity using a thin base material plate of 3t or less, it has the effect of reducing the thickness-wise size of the entire antenna device product, thereby making the product lighter and slimmer. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view showing a filter for a communication device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is an internal perspective view of FIG. [Figure 3] FIG. 2 is a perspective view of the base plate of the configuration of FIG. 1 in an expanded state. [Figure 4] FIG. 4 is a plan view of FIG. 3. [Figure 5] 2 is an exploded perspective view showing an embodiment in which the input terminal pins and the output terminal pins are provided as separate parts in the configuration of FIG. 1. FIG. [Figure 6] (a, b) are perspective cutaway views along line AA. [Figure 7] 2A and 2B are a cross-sectional view and a partially enlarged plan view showing the fixing structure of the input terminal pins and the output terminal pins in the configuration of FIG. 1. [Figure 8] 2 is a perspective view showing a first example of realizing a plurality of resonators in the configuration of FIG. 1. FIG. [Figure 9] FIG. 10 is a perspective view showing a filter for a communication device according to a second embodiment of the present invention. [Figure 10] FIG. 10 is an internal perspective view of FIG. [Figure 11] FIG. 10 is a plan view of a base plate in the configuration of FIG. 9. [Figure 12]10 is an exploded perspective view showing an embodiment in which the input terminal pins and the output terminal pins are provided as separate parts in the configuration of FIG. 9. FIG. [Figure 13] 10 is a cutaway perspective view of the configuration of FIG. 9 in which a part of the upper plate forming portion is removed along line BB. [Figure 14] 10 is a cutaway perspective view of the configuration of FIG. 9 in which a part of the upper plate forming portion is removed along line CC. [Figure 15] 10 is a perspective view and a partially enlarged view of FIG. 9. FIG. [Figure 16] 10 is a perspective view showing a second example of realizing a plurality of resonators in the configuration of FIG. 9. FIG. [Figure 17] FIG. 10 is a perspective view showing a filter for a communication device according to a third embodiment of the present invention. [Figure 18] FIG. 18 is an internal perspective view of FIG. [Figure 19] FIG. 18 is a plan view of a base plate in the configuration of FIG. 17. [Figure 20] FIG. 18 is an exploded perspective view showing an embodiment in which the input terminal pins and the output terminal pins are provided as separate parts in the configuration of FIG. 17. [Figure 21] (a, b) are perspective views cut along line DD. [Figure 22] FIG. 10 is a perspective view showing a filter for a communication device according to a fourth embodiment of the present invention. [Figure 23] FIG. 23 is an internal perspective view of FIG. 22. [Figure 24] FIG. 23 is a plan view of a base plate in the configuration of FIG. 22. [Figure 25] FIG. 23 is an exploded perspective view showing an embodiment in which the input terminal pins and the output terminal pins are provided as separate parts in the configuration of FIG. 22. [Figure 26] FIG. 1 is a perspective cutaway view taken along line EE. [Figure 27] FIG. 1 is a perspective view of an embodiment of the present invention in an unfolded state that is closest to an actual product. [Figure 28] FIG. 28 is a perspective view showing a state in which a part of the base plate of FIG. 27 is folded. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, a filter for a communication device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0026] When assigning reference numerals to components in each drawing, it should be noted that the same components are assigned the same numerals as much as possible even if they are displayed in different drawings. Furthermore, when describing the embodiments of the present invention, if it is determined that a detailed description of such well-known configurations or functions would hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

[0027] When describing components of embodiments of the present invention, terms such as "first," "second," "A," "B," "(a)," and "(b)" may be used. These terms are merely used to distinguish the component from other components and do not limit the nature, order, or procedure of the components. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0028] FIG. 1 is a perspective view showing a filter for a communication device according to a first embodiment of the present invention, FIG. 2 is an internal perspective view of FIG. 1, FIG. 3 is a perspective view of the base plate of the configuration of FIG. 1 in an expanded state, FIG. 4 is a plan view of FIG. 3, FIG. 5 is an exploded perspective view showing an embodiment of the configuration of FIG. 1 in which input terminal pins and output terminal pins are provided as separate objects, FIG. 6 is a cutaway perspective view (a, b) along line AA, FIG. 7 is a cross-sectional view showing the fixing structure of the input terminal pins and output terminal pins of the configuration of FIG. 1, and a partially enlarged view of the plan view, and FIG. 8 is a perspective view showing a first implementation example of multiple resonators of the configuration of FIG. 1.

[0029] Generally, in the field of antenna technology, a filter serves to filter out only signals of a specific frequency band from among signals that must be input or output during a transmission / reception process, so that only the signal desired by the consumer (user) is obtained as the result value.

[0030] To filter such signals, a cavity filter, as the name suggests, forms a cavity, which is a predetermined signal filtering section, between an input port where the signal is input and an output port where the signal is output, and obtains a frequency signal value of a specific band in the section desired by the consumer through a frequency tuning process using the cavity.

[0031] However, until now, in the industry of manufacturing antenna devices, only a method has been disclosed for manufacturing a cavity filter, in which the inside of a filter body made of a ceramic material or a material with higher rigidity is processed to manufacture the above-mentioned cavity, and essential components for frequency filtering, such as a plurality of resonators, are manufactured separately and then fixed inside the cavity.

[0032] However, the filter for communication devices according to the embodiment of the present invention breaks away from the above-mentioned manufacturing method and discloses an innovative technical feature in which a single flat base plate not exceeding a predetermined thickness is processed into a sheet metal shape, and then a structure within a cavity is constructed through a folding process without a separate joining process. Specific technical features will be described below in the order of the embodiment.

[0033] The filter 100 for a communication device according to the first embodiment of the present invention is manufactured in an unfolded state and includes a base plate 105 made of a conductive material that is foldable so that, when folded, a cavity C is formed therein and a plurality of resonators 170 protruding a predetermined length in the thickness direction or width direction are positioned within the cavity C.

[0034] It is preferable that the base plate 105 is made of a conductive material, but it can also be made of a non-conductive material that is easy to manufacture, and it should be made clear in advance that in order to perform the function of cavity C, a conductive material can be coated by plating on both the inside and outside including cavity C, or at least on the inside corresponding to cavity C.

[0035] However, since the base plate 105 must maintain its shape continuously after being deformed by the folding process as described below unless an external force is applied, it is preferable that the base plate 105 be made of a deformable material that can be processed to suit this purpose.

[0036] Here, the cavity C is a dielectric-filled space to be filled with a dielectric having a predetermined dielectric constant, and refers to a space that is empty inside so that it can be filled with a dielectric. It should be made clear in advance that, since air is also a type of dielectric with a dielectric constant of 1, when air under atmospheric pressure is used as the dielectric, a separate dielectric filling step is not required.

[0037] Meanwhile, in the filter 100 for a communication device according to the first embodiment of the present invention, the base material plate 105 serves to form a cavity C, which is a space filled with a dielectric.

[0038] Here, as shown in Figures 3 and 4, the base plate 105 may include a body bottom forming panel 110 that forms the bottom of the cavity C after folding; one side thickness forming panel 120 and another side thickness forming panel 130 that are extended in plan to increase the width at one and other widthwise ends of the body bottom forming panel 110, thereby increasing the thickness of the cavity C; a resonator panel 160 that is extended from the tip of one of the one side thickness forming panel 120 and the other side thickness forming panel 130 and has a plurality of resonators 170 protruding into the cavity C corresponding to the upper part of the body bottom forming panel 110; and an upper body forming panel 150 that is extended from the other tip of the one side thickness forming panel 120 and the other side thickness forming panel 130 and is configured to face the body bottom forming panel 110 and cover the upper part of the cavity C.

[0039] In addition, one side shielding panel 180A and the other side shielding panel 180B that shield the open one and other longitudinal ends of the cavity C can be integrally formed at one and other longitudinal ends of the body bottom forming panel 110 by extending them.

[0040] Here, the description is limited to the case where the one-side shielding panel 180A and the other-side shielding panel 180B are integrally formed with the body bottom forming panel 110, but it goes without saying that in some embodiments, they may be symmetrically formed integrally with adjacent panels (e.g., the body upper forming panel 150, etc.). Also, the one-side shielding panel 180A and the other-side shielding panel 180B may be formed integrally with adjacent panels so as to be separated into two members, and may be configured to completely shield each open cavity C portion by a folding operation.

[0041] Meanwhile, the body bottom forming panel 110 may be provided with an input port mounting portion 115A and an output port mounting portion 115B formed by penetrating vertically at one longitudinal end and the other longitudinal end, respectively, and an input terminal pin 175A, which will be described later, may be inserted through the input port mounting portion 115A, and an output terminal pin 175B, which will be described later, may be inserted through the output port mounting portion 115B.

[0042] In particular, as shown in FIG. 7, the input port mounting portion 115A and the output port mounting portion 115B may be formed as a circular hole larger than the horizontal cross-sectional area of ​​the input terminal pin 175A or the output terminal pin 175B, and a portion of the edge of the hole may be provided as a boss portion 116 that protrudes a predetermined length inside the cavity C.

[0043] Here, Teflon 118 for impedance matching is interposed on the outer surface of the input terminal pin 175A or the output terminal pin 175B, and fixing protrusions 117 having a stud or serration protrusion shape for stable and fixed installation of the Teflon 118 are integrally formed on the inner circumferential surfaces of the holes of the input port mounting part 115A and the output port mounting part 115B, which are provided with the boss part 116. The Teflon 118 is inserted by interference fit and stably fixed, which advantageously minimizes insertion loss.

[0044] In addition, as shown in Figures 3 and 4, the base plate 105 may further include a notch forming panel 140 that is provided between the body upper forming panel 150 connecting the one-side thickness forming panel 120 and the other-side thickness forming panel 130 and the resonator 170 of the resonator panel 160, and is extended horizontally (or in the thickness direction) within the cavity C.

[0045] The notch forming panel 140 has a shape corresponding to the surrounding shape of the cavity C, and is formed in a frame shape that is perforated from top to bottom, and an L-notch portion 141 and a C-notch portion 142 may be formed in specific shapes at one inner side end and the other inner side end in the width direction, respectively.

[0046] Here, it goes without saying that the L-notch portion 141 and the C-notch portion 142 do not necessarily have to be provided in the notch forming panel 140, but can also be formed integrally with the body upper forming panel 150 as long as they can be deformed into shape inside the cavity C by an operator who will later perform frequency tuning.

[0047] As shown in Figures 3 and 4, when the notch forming panel 140 is provided simultaneously with the body upper forming panel 150, one side spacing panel 151 and another side spacing panel 152 that separate the notch forming panel 140 and the body upper forming panel 150 in the thickness direction within the cavity C may further be provided integrally with the base plate 105.

[0048] Here, the lower end of the other-side separation panel 152 can be welded to the upper end of the other-side thickness forming panel 130, which is the starting point (one end) of the formation of the notch forming panel 140, after the folding of the body upper forming panel 150 is completed.

[0049] In addition, the end portion (other end) of the notch-forming panel 140, which corresponds to the lower end of the one-side separation panel 151, can be welded to the upper surface of the portion overlapping the resonator panel 160 in the thickness direction after the resonator panel 160 is completely folded.

[0050] Meanwhile, the upper body forming panel 150 may be integrally cut out to have a frequency tuning bar (not shown) for fine frequency tuning by adjusting the distance between the resonators 170 arranged inside the cavity C to form a single layer in the thickness direction, and a plurality of coupling adjustment bars (not shown) that are each deformed in shape and located directly below the resonators 170.

[0051] It goes without saying that tool insertion holes (not shown) can be formed through the upper body forming panel 150 from top to bottom so that the above-mentioned L-notch portion 141 and C-notch portion 142 can be deformed using a predetermined tool.

[0052] Here, as shown in Figures 2 to 7, assuming that the cavity C generated by folding each portion of the base plate 105 is formed into a slim rectangular parallelepiped shape that is long in the longitudinal direction and whose size in the vertical thickness direction is relatively very small compared to the front-to-back width direction, the multiple resonators 170 may be arranged to form the same single layer in the thickness direction of the cavity C.

[0053] In addition, the L-notch portion 141 and the C-notch portion 142 provided in the notch forming panel 140 may also be provided to form the same single layer in the thickness direction of the cavity C, and to form a single layer different from the multiple resonators 170 described above.

[0054] In this case, the thickness of each single layer formed by the plurality of resonators 170 and the L-notch portion 141 and the C-notch portion 142 is exactly the thickness of the base plate 105, which is a very slim thickness, and therefore provides an advantage that a designer can achieve a slim design as desired without increasing the size including the thickness of the entire product.

[0055] 8, the plurality of resonators 170 may include a resonating characteristic end 173 that is flat and has a wider width so that the tip end forms the same layer as other portions within the cavity C. For ease of explanation, the body portion of each component of the plurality of resonators 170 that extends integrally from the base plate 105 and has the resonating characteristic end 173 connected to its tip will be referred to as a resonating bar 171.

[0056] Here, at least one of the plurality of resonators 170 may be integrally formed with an input terminal pin 175A connected to an input port (not shown) so that a signal transmitted from the input port is input, and at least another of the plurality of resonators 170 may be integrally formed with an output terminal pin 175B connected to an output port (not shown) so that a signal is transmitted to and output from the output port.

[0057] Meanwhile, the resonant characteristic ends 173 of the plurality of resonators 170 may be integrally formed by extending the other portions (resonant bars 171) to have an angular shape at the tip thereof, as shown in FIG. 8(a).

[0058] Also, the resonant characteristic ends 173 of the plurality of resonators 170 may be formed as a rounded integral extension at the tip of the other portion (resonant bar 171) as shown in FIG. 8(b).

[0059] Finally, the resonant characteristic ends 173 of the multiple resonators 170 may be integrally extended to have a "U" shape surrounding the tip of the other portion (resonant bar 171), as shown in (c) of Figure 8.

[0060] A method for manufacturing the filter for a communication device according to the first embodiment of the present invention configured as above will be briefly described as follows.

[0061] First, a base plate 105 made of a conductive or non-conductive material is prepared (base plate preparation process), and then it is moved to a press mold where it can be press-formed into a pre-designed shape (press sheet metal processing process).

[0062] At this time, as described above, it is preferable that the base plate 105 is designed as sheet metal so as to form a cavity C that is shielded from the outside by the body bottom forming panel 110, the one side thickness forming panel 120, the other side thickness forming panel 130, the one side shielding panel 180A and the other side shielding panel 180B, the body upper forming panel 150 and other panels directly connected thereto (e.g., the one side separation panel 151 and the other side separation panel 152) through the folding process described below.

[0063] In addition, after the base plate 105 is press-processed through the press sheet metal processing process, if the material of the base plate 105 is non-conductive, a separate conductive coating process can be additionally carried out so that a conductive material is coated on at least the entire inside of the cavity C, and then a folding process can be carried out to form the cavity C.

[0064] Here, the folding process may involve folding related panels sequentially from bottom to top to form the cavity C based on the body bottom forming panel 110, folding the resonator panel 160 so that the multiple resonators 170 formed in the resonator panel 160 form the same layer (or single layer) within the cavity C, and folding the L-notch portion 141 and the C-notch portion 142 formed in the notch forming panel 140 so that they form a single layer different from the multiple resonators 170 within the cavity C.

[0065] FIG. 9 is a perspective view showing a filter for a communication device according to a second embodiment of the present invention, FIG. 10 is an internal perspective view of FIG. 9, FIG. 11 is a plan view of a base plate in the configuration of FIG. 9, FIG. 12 is an exploded perspective view showing an embodiment in which the input terminal pin and the output terminal pin are provided as separate parts in the configuration of FIG. 9, FIGS. 13 and 14 are cutaway perspective views of the configuration of FIG. 9 in which part of the upper plate forming portion has been removed along lines BB and CC, FIG. 15 is a perspective view and a partial enlarged view of FIG. 9, and FIG. 16 is a perspective view showing a second example of realizing multiple resonators in the configuration of FIG. 9.

[0066] As shown in FIGS. 9 to 16 , filter 200 for a communication device according to the second embodiment of the present invention has the same technical features as first embodiment 100 described above in that a slim rectangular parallelepiped cavity C is formed by a folding process of each portion of base plate 205, and multiple resonators 270, L-notch portion 241, and C-notch portion 242 are formed inside cavity C so as to form different single layers in the thickness direction.

[0067] More specifically, in the filter 200 for a communication device according to the second embodiment of the present invention, as shown in FIGS. 9 to 16, the base plate 205 includes a body bottom forming panel 210 that forms the bottom of the cavity C after folding, one side thickness forming panel 220 and the other side thickness forming panel 230 that are extended in plane so that the width increases at one side end and the other side end of the body bottom forming panel 210, thereby increasing the size of the cavity C in the thickness direction, and one end of the one side thickness forming panel 220 and the other side thickness forming panel 230 (the present invention). In the second embodiment, the body bottom forming panel 210 may include a resonator panel 260 having a plurality of resonators 270 extending from the other end of the one-side thickness forming panel 220 and the other-side thickness forming panel 230, and extending from the other end of the one-side thickness forming panel 220 and the other-side thickness forming panel 230, facing the body bottom forming panel 210 and covering the upper part of the cavity C, and having an L-notch portion 241 and a C-notch portion 242 formed by incisions.

[0068] In addition, one side shielding panel 280A and the other side shielding panel 280B for shielding the open one and other longitudinal ends of the cavity C can be integrally formed at one and other longitudinal ends of the body bottom forming panel 210 by extending them.

[0069] Here again, the one side shielding panel 280A and the other side shielding panel 280B are not limited to being integrally formed with the body bottom forming panel 210, and depending on the embodiment, they may also be symmetrically formed integrally with adjacent panels (e.g., the body upper forming panel 250, etc.), and the one side shielding panel 280A and the other side shielding panel 280B may be formed integrally with adjacent panels so as to be separated into two parts, and may be configured to completely shield each open cavity C portion by a folding action.

[0070] Furthermore, in the filter 200 for a communication device according to the second embodiment of the present invention, the body bottom forming panel 210 may be provided with an input port mounting portion 215A and an output port mounting portion 215B formed to penetrate vertically at one longitudinal end and the other longitudinal end, respectively, as in the filter 100 for a communication device according to the first embodiment already described. An input terminal pin 275A may be inserted through the input port mounting portion 215A, and an output terminal pin 275B, which will be described later, may be inserted through the output port mounting portion 215B. Fixing protrusions 117 having a stud or serration protrusion shape for stably and securely installing Teflon 118 may be integrally formed on the inner circumferential surfaces of the holes of the input port mounting portion 215A and the output port mounting portion 215B, in which the input terminal pin 275A or the output terminal pin 275B is installed, as shown in FIG. 7 . This allows the Teflon 118 to be inserted and stably fixed by an interference fit, thereby advantageously minimizing insertion loss.

[0071] In the filter 100 for a communication device according to the first embodiment of the present invention, the upper body forming panel 150 and the resonator panel 160 have different heights in the thickness direction and are formed to be stepped relative to each other, whereas in the filter 200 for a communication device according to the second embodiment of the present invention, the upper body forming panel 250 and the resonator panel 260 all have the same height in the thickness direction, and therefore essentially function to shield each other by partially covering the upper part of the cavity C.

[0072] Furthermore, as shown in FIGS. 9 to 16 , filter 200 for a communication device according to the second embodiment of the present invention differs from first embodiment 100 in that a separate notch-forming panel in which L-notch portion 241 and C-notch portion 242 are formed is not provided, and instead, upper body forming panel 250 is formed with L-notch incision grooves 241 h and C-notch incision grooves 242 h, which are deformed inward in the thickness direction of cavity C using a predetermined tool or press machine during a press sheet metal process, and are integrally formed with the upper body forming panel 250 in a partially incised shape that allows the cavity C to protrude.

[0073] Meanwhile, in the filter 200 for a communication device according to the second embodiment of the present invention, the plurality of resonators 270 may not form a single layer at the same height as the resonator panel 260 as shown in FIG. 11 , but may further have a folding line 270′ formed along which the resonators 270 are folded to form a single layer within the cavity C, which is lower than the resonator panel 260 and the body upper forming panel 250.

[0074] Along with this, multiple resonators 270 can also be formed in various implementations, as shown in FIG.

[0075] More specifically, the plurality of resonators 270 may include a resonating characteristic end 273 whose tip is bent perpendicular to the longitudinal direction of the other portion (resonating bar 271) and has a wider width.

[0076] Here, the resonant characteristic ends 273 of the multiple resonators 270 may be formed as an integral extension such that one end of the rectangle is bent perpendicular to the tip of the other part (resonant bar 271), as shown in (a) of Figure 16.

[0077] In addition, the resonant characteristic ends 273 of the plurality of resonators 270 may be integrally formed so that an arc-shaped intermediate portion with one side open is bent perpendicular to the tip, as shown in FIG. 16(b).

[0078] Finally, the resonating characteristic ends 273 of the plurality of resonators 270 may be integrally formed so that the middle portion of the inverted U-shaped portion, which is open on one side, is bent perpendicular to the tip end.

[0079] Meanwhile, filter 200 for a communication device according to the second embodiment of the present invention is different from filter 100 for a communication device according to the first embodiment of the present invention in the folding method and sequence of base plate 205. The specific folding method and sequence are as shown in FIG.

[0080] FIG. 17 is a perspective view showing a filter for a communication device according to a third embodiment of the present invention, FIG. 18 is an internal perspective view of FIG. 17, FIG. 19 is a plan view of a base plate in the configuration of FIG. 17, FIG. 20 is an exploded perspective view showing an embodiment in which the input terminal pin and the output terminal pin are provided as separate parts in the configuration of FIG. 17, and FIG. 21 are cut-away perspective views (a, b) along line DD.

[0081] As shown in FIGS. 17 to 21 , filter 300 for a communications device according to the third embodiment of the present invention has the same technical features as filter 100 for a communications device according to the first embodiment of the present invention and filter 200 for a communications device according to the second embodiment of the present invention in that a slim rectangular parallelepiped cavity C is formed by folding each portion of base plate 305, and a plurality of resonators 370 and L-notch portion 341 and C-notch portion 342 are formed inside cavity C so as to form different single layers in the thickness direction.

[0082] More specifically, in the filter 300 for a communication device according to the third embodiment of the present invention, the base plate 305 includes, as shown in FIGS. 17 to 21, a body bottom forming panel 310 that forms the bottom of the cavity C after folding, a one-side thickness forming panel 320 that is extended in a plane at one widthwise end of the body bottom forming panel 310 to increase the width and thereby increase the size of the cavity C in the thickness direction, and a other-side thickness forming panel 320 that is extended in a plane at the other widthwise end of the body bottom forming panel 310 to increase the width and thereby increase the size of the cavity C in the thickness direction. the upper body forming panel 350, which is formed by extending from the one-side thickness forming panel 320 and facing the body bottom forming panel 310 to cover the upper part of the cavity C, and which has an L-notch groove 341h and a C-notch groove 342h formed therein so that an L-notch portion 341 and a C-notch portion 342 are formed; and a resonator panel 360, which is formed by extending from the other side end in the width direction of the upper body forming panel 350 and has a plurality of resonators 370 protruding into the cavity C corresponding to the upper part of the body bottom forming panel 310.

[0083] In addition, one side shielding panel 380A and the other side shielding panel 380B for shielding the open one and other longitudinal ends of the cavity C can be integrally formed at one and other longitudinal ends of the body bottom forming panel 310 by extending them.

[0084] Comparing filter 300 for a communication device according to the third embodiment of the present invention with filter 100 for a communication device according to the first embodiment of the present invention already described, there is a difference in that a separate notch forming panel in which L-notch portion 341 and C-notch portion 342 are formed is not provided, and instead upper body forming panel 350 is formed with L-notch incision groove 341h and C-notch incision groove 342h, which are formed in upper body forming panel 350 and are integrally formed with a partially incised shape that can be deformed and protruded inward in the thickness direction of cavity C using a predetermined tool or press equipment.

[0085] In addition, in the filter 300 for a communication device according to the third embodiment of the present invention, while in the filter 200 for a communication device according to the second embodiment of the present invention, the portions of the base plate 305 for forming the cavity C where final butt welding is performed are designed and realized at the outer widthwise edge of the body upper forming panel 250 and the outer widthwise edge of the resonator panel 260 where the multiple resonators 270 are formed, a second thickness forming panel 330 equivalent to half the area of ​​the body upper forming panel 350 is integrally provided at the outer edge, and the outer edge of the resonator panel 360 to which the multiple resonators 370 are connected abuts against the second thickness forming panel 330 so as to be butt-welded.

[0086] Meanwhile, the third embodiment 300 is different from the first embodiment 100 and the second embodiment 200 in the folding method and sequence of the base plate 305. The specific folding method and sequence are as shown in FIG.

[0087] FIG. 22 is a perspective view showing a filter for a communication device according to a fourth embodiment of the present invention, FIG. 23 is an internal perspective view of FIG. 22, FIG. 24 is a plan view of a base plate in the configuration of FIG. 22, FIG. 25 is an exploded perspective view showing an embodiment in which the input terminal pin and the output terminal pin are provided as separate parts in the configuration of FIG. 22, and FIG. 26 is a cutaway perspective view along the line EE.

[0088] As shown in Figures 22 to 26, filter 400 for a communication device according to the fourth embodiment of the present invention has the same technical features as the first to third embodiments 100 to 300 described above in that a slim rectangular parallelepiped cavity C is formed by folding each portion of base plate 405, and multiple resonators 470 and L-notch portion 441 and C-notch portion 442 are formed inside cavity C so as to form different single layers in the thickness direction.

[0089] More specifically, in the filter 400 for a communication device according to the fourth embodiment of the present invention, as shown in FIGS. 22 to 26, the base plate 405 includes a body bottom forming panel 410 that forms the bottom portion of the cavity C after folding, a one-side thickness forming panel 420 that is extended in plane at one widthwise end of the body bottom forming panel 410 to increase its width and thereby increases the size of the cavity C in the thickness direction, a other-side thickness forming panel 430 that is extended in plane at the other widthwise end of the body bottom forming panel 410 to increase its width and thereby partially increases the size of the cavity C in the thickness direction, and a body bottom forming panel 440 that is extended in plane at the outer widthwise end of the one-side thickness forming panel 420 to increase its width and thereby increases the size of the cavity C in the thickness direction. The body bottom forming panel 410 may include an upper body forming panel 450 facing the upper body forming panel 410 and covering the upper part of the cavity C; a resonator panel 460 extending in plane so as to increase in width at the outer end of the upper body forming panel 450 and having a plurality of resonators 470 protruding into the cavity C corresponding to the upper part of the body bottom forming panel 410; and a notch forming panel 440 extending in plane so as to increase in width at the outer end of the other thickness forming panel 430 and having an L-notch portion 441 and a C-notch portion 442 disposed as a single layer in the cavity C corresponding to the lower part of the cavity C below the resonator panel 460 and the plurality of resonators 470 in the cavity C corresponding to the upper part of the body bottom forming panel 410.

[0090] In addition, one side shielding panel 480A and the other side shielding panel 480B for shielding the open one and other longitudinal ends of the cavity C can be integrally formed at one and other longitudinal ends of the body bottom forming panel 410 by extending them.

[0091] As shown in Figures 22 to 26, a filter 400 for a communication device according to the fourth embodiment of the present invention is different from the first embodiment 100 in that a notch-forming panel 440 having an L-notch portion 441 and a C-notch portion 442 formed therein is configured to form a single layer that is relatively closer to the body bottom-forming panel 410 in the thickness direction of the cavity C compared to a plurality of resonators 470.

[0092] 22 to 26, the filter 400 for a communication device according to the fourth embodiment of the present invention is different from the second embodiment 200 and the third embodiment 300 in that the resonator bars 471 of the plurality of resonators 470 are integrally formed in a groove-chamfered portion (see reference numeral 465) so as not to coincide with the edge of the resonator panel 460, and a filling portion 435 shaped to fill the separately chamfered resonator panel 460 is further provided in the other thickness-forming panel 430 by the folding process of the base plate 405.

[0093] On the other hand, the fourth embodiment 400 is different from the first to third embodiments 100 to 300 in the folding method and sequence of the base plate 405. The specific folding method and sequence are as shown in FIG.

[0094] FIG. 27 is a perspective view of an embodiment of the present invention in an unfolded state that is closest to an actual product, and FIG. 28 is a perspective view showing a state in which a part of the base plate of FIG. 27 is folded.

[0095] 27 and 28, in embodiments 100 to 400 of the present invention, a plurality of tuning bars 190A and a plurality of coupling adjustment bars 190B may be integrally formed on the upper body forming panel 150 to adjust a predetermined distance between the plurality of resonators 170 provided inside the cavity C by a folding process. Thus, prior to the actual folding process of the first base plate 105, the plurality of tuning bars 190A, the coupling adjustment bars 190B, the L-notch portion 141, the C-notch portion 142, and the plurality of resonators 170 can be folded according to the design, as shown in FIG. At this time, the one-side terminal pin 175A and the other-side terminal pin 175B can also be folded by the folding process so as to be bent toward the input port mounting portion 115A and the output port mounting portion 115B.

[0096] The filters 100 to 400 for communication devices according to the embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, it goes without saying that the embodiments of the present invention are not necessarily limited to the above-described embodiments, and that various modifications and equivalent implementations are possible by those skilled in the art. Therefore, the true scope of the present invention is defined by the claims that follow. [Industrial Applicability]

[0097] The present invention provides a filter for a communications device that eliminates the traditional bonding process for forming a cavity and providing a structure such as a resonator within the cavity, thereby reducing the amount of insertion loss due to the coupling of two physical structures. [Explanation of symbols]

[0098] 100: First embodiment, 105: Base plate 110: Body bottom forming panel, 120: One side thickness forming panel 130: other side thickness forming panel, 140: notch forming panel 150: Upper body forming panel, 160: Resonator panel 170: Multiple resonators, 200: Second embodiment 300: Third embodiment, 400: Fourth embodiment

Claims

1. a base plate made of a conductive material, which is manufactured in an unfolded state and is foldable so that a cavity is formed therein when folded, and a plurality of resonators protruding a predetermined length in a thickness direction or a width direction are positioned inside the cavity; The plurality of resonators each include a resonating characteristic end portion having a flat and wider width such that the tip portion forms the same layer as the other portions within the cavity; The base plate after folding is a body bottom forming panel that forms a bottom surface of the cavity; one side thickness forming panel and another side thickness forming panel that increase the size of the cavity in the thickness direction; a resonator panel having a plurality of resonators protruding into the cavity corresponding to an upper portion of the body bottom forming panel; an upper body forming panel provided in a form covering an upper portion of the cavity, The base plate after folding is The filter for a communication device further includes a notch forming panel provided between the body upper forming panel and the plurality of resonators of the resonator panel.

2. At least one of the plurality of resonators is integrally formed with an input terminal pin connected to an input port so that a signal transmitted from the input port is input thereto; 2. The filter for a communication device according to claim 1, wherein at least one other of the plurality of resonators is integrally formed with an output terminal pin connected to the output port so that a signal is transmitted and output from the output port.

3. 2. The filter for a communication device according to claim 1, wherein the resonance characteristic ends of the plurality of resonators are integrally extended to form an angular tip on the other portion.

4. 2. The filter for a communication device according to claim 1, wherein the resonance characteristic ends of the plurality of resonators are integrally extended to the tip of the other portion via a curved surface.

5. 2. The filter for a communication device according to claim 1, wherein the resonant characteristic ends of the plurality of resonators are integrally extended to form a "U" shape surrounding the tip of the other portion.

6. the base plate is made of either a conductive material or a non-conductive material; 2. The filter for a communication device according to claim 1, wherein when said base plate is made of a non-conductive material, at least an interior portion corresponding to said cavity is coated with a conductive material.

7. 2. The filter for a communication device according to claim 1, wherein the cavity is filled with air having a relative dielectric constant of 1.

8. The base plate after folding is 2. The filter for a communication device according to claim 1, further comprising one-side shielding panel and another-side shielding panel for shielding one and the other longitudinal ends of the cavity.

9. A device comprising: a base plate made of a conductive material that is manufactured in an unfolded state and that, when folded, forms a cavity therein and is foldable so that a plurality of resonators protruding a predetermined length in the thickness direction or width direction are positioned inside the cavity; The plurality of resonators each include a resonating characteristic end portion having a flat and wider width such that the tip portion forms the same layer as the other portions within the cavity; The base plate after folding is a body bottom forming panel that forms a bottom surface of the cavity; one side thickness forming panel and another side thickness forming panel that increase the size of the cavity in the thickness direction; a resonator panel having a plurality of resonators protruding into the cavity corresponding to an upper portion of the body bottom forming panel; an upper body forming panel provided in a form covering an upper portion of the cavity, At least one of the plurality of resonators is integrally formed with an input terminal pin connected to an input port so that a signal transmitted from the input port is input thereto; an output terminal pin is integrally formed with at least another of the plurality of resonators and is connected to the output port so that a signal is transmitted to and output from the output port; a filter for a communication device, wherein input port mounting portions and output port mounting portions, through which the input terminal pins or the output terminal pins are inserted, are formed in a boss shape penetrating vertically in the body bottom forming panel, and fixing protrusions, having a stud or serration protrusion shape, of Teflon (registered trademark) for fixed installation are formed on inner peripheral surfaces of the holes in the input port mounting portion and the output port mounting portion.

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