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 when folded, and a plurality of resonators that protrude a predetermined length in a thickness direction or width direction within the cavity. The plurality of resonators include resonant characteristic ends whose tip ends are wider than other portions and whose both ends of the width are rounded from the tip of the other portion in one side in the thickness direction.

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] According to one embodiment of the present invention, a filter for a communication device 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 a width direction. The plurality of resonators each include a resonant characteristic end having a width greater than that of other portions, and both ends of the width being wound in a round shape from the tip of the other portion in one thickness direction.

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

[0013] The resonance characteristic ends of the plurality of resonators may be spaced apart from each other by a predetermined distance at both ends of the width in a rounded state.

[0014] Furthermore, the resonant characteristic ends of the plurality of resonators may be formed to have at least one circular or semicircular horizontal cross section.

[0015] 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.

[0016] The cavity may also be filled with air, which has a dielectric constant of 1.

[0017] In addition, the base plate after folding may include a body bottom forming panel that forms the bottom of the cavity, one side thickness forming panel and an other side thickness forming panel that increase the thickness dimension of the cavity, and a body top forming panel that is provided in a form that covers the top of the cavity.

[0018] In addition, the body bottom forming panel includes a one-side body bottom forming panel that forms one side of the bottom of the cavity and an other-side body bottom forming panel that forms the other side of the bottom of the cavity, and the one-side body bottom forming panel and the other-side body bottom forming panel can form the complete bottom of the cavity after folding.

[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] The base plate may further include a plurality of resonators formed on the one-side body bottom forming panel and the other-side body bottom forming panel. [Effects of the Invention]

[0021] 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.

[0022] 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]

[0023] [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 9A] FIG. 10 is a perspective view showing a filter for a communication device according to a second embodiment of the present invention. [Figure 9B] FIG. 10 is a perspective view showing a filter for a communication device according to a second embodiment of the present invention. [Figure 10A] FIG. 9B is an internal perspective view of FIG. 9A. [Figure 10B] FIG. 9C is an internal perspective view of FIG. 9B. [Figure 11] FIG. 9B is a plan view of a base plate in the configuration of FIG. 9A. [Figure 12] 9B 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. 9A. FIG. [Figure 13] 9B is a cutaway perspective view of the configuration of FIG. 9A in which a part of the upper plate forming portion is removed along line DD. FIG. [Figure 14] 9B is a perspective view showing various implementations of multiple resonators in the configuration of FIG. 9A. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] Here, Teflon (registered trademark) 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] In addition, an end portion (other end) of the notch-forming panel 140 corresponding to the lower end of the one-side separation panel 151 may be welded to an upper surface of a portion overlapping the resonator panel 160 in the thickness direction after the resonator panel 160 is completely folded. Meanwhile, the upper body forming panel 150 may be integrally formed with a frequency tuning bar (not shown) for fine frequency tuning by adjusting the distance between the resonators 170 provided in the cavity C to form a single layer in the thickness direction, and a plurality of coupling adjustment bars (not shown) that are deformed in shape and located directly below the resonators 170.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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).

[0056] 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).

[0057] 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.

[0058] 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.

[0059] 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).

[0060] 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.

[0061] 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.

[0062] 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.

[0063] On the other hand, as long as the cavity C is formed by folding the base plate 105 (folding method), the embodiment of the filter for a communication device of the present invention is not necessarily limited to the above-mentioned first embodiment 100. A filter for a communication device 1100 according to a second embodiment of the present invention will now be described in detail.

[0064] 9A and 9B are perspective views showing a filter for a communication device according to a second embodiment of the present invention, FIGS. 10A and 10B are internal perspective views of FIGS. 9A and 9B, FIG. 11 is a plan view of a base plate in the configuration of FIG. 9A, FIG. 12 is an exploded perspective view showing an embodiment in which an input terminal pin and an output terminal pin are provided as separate parts in the configuration of FIG. 9A, FIG. 13 is a cutaway perspective view in which a portion of the upper plate forming portion in the configuration of FIG. 9A has been removed along line DD, and FIG. 14 is a perspective view showing various examples of realizing multiple resonators in the configuration of FIG. 9A.

[0065] In a filter 1100 for a communication device according to a second embodiment of the present invention, as shown in FIGS. 9A to 14, a base plate 1105 includes a one-side body bottom forming panel 1110A that forms one side of the bottom surface of the cavity C after folding, an other-side body bottom forming panel 1110B that forms the other side of the bottom surface of the cavity C, a one-side thickness forming panel 1120 and an other-side thickness forming panel 1130 that are respectively extended from the outer widthwise ends of the one-side body bottom forming panel 1110A and the other-side body bottom forming panel 1110B and increase the thickness of the cavity C, and a first one-side shielding panel 1130 that extends from one longitudinal end of the one-side thickness forming panel 1120 and extends by half the width. The panel 1180A may include a first shielding panel 1180A-1, a second shielding panel 1180A-2 extending from the other longitudinal end of the other thickness forming panel 1130 and extending half the widthwise dimension, an other shielding panel 1180B extending the widthwise dimension to interconnect the other longitudinal end of the one thickness forming panel 1120 and one longitudinal end of the other thickness forming panel 1130, and an upper body forming panel 1150 extending to the other widthwise end opposite to the one widthwise end of the one thickness forming panel 1120 on which the one side body bottom forming panel 1110A is formed, and configured to face the one side body bottom forming panel 1110A and the other side body bottom forming panel 1110B and cover the top of the cavity C.

[0066] Here, the outer end of one side body bottom forming panel 1110A and the outer end of the other side body bottom forming panel 1110B may include a plurality of resonators 1170 extending from the inside of the bottom of cavity C toward the thickness direction facing the body upper forming panel 1150.

[0067] More specifically, some (three) of the multiple resonators 1170 are formed at the outer end of the one-side body bottom forming panel 1110A and are configured to be bent at the bottom of a resonance cutout cut to a predetermined depth on the inside of the width direction of the one-side body bottom forming panel 1110A, and the remaining (three) of the multiple resonators 1170 are formed at the outer end of the other-side body bottom forming panel 1110B and are configured to be bent at the bottom of a resonance cutout cut to a predetermined depth on the inside of the width direction of the other-side body bottom forming panel 1110B, and may be formed to protrude toward the body upper forming panel 1150 while forming two rows in the thickness direction within the cavity C.

[0068] In addition, the filter 1100 for a communication device according to the second embodiment of the present invention may further include a partition panel 1190 that is provided at the outer end of either the first one-side shielding panel 1180A-1 or the second one-side shielding panel 1180A-2 and is folded inside the cavity C during the folding process to spatially divide the cavity C into two widthwise sides.

[0069] The difference between the filter 1100 for a communication device according to the second embodiment of the present invention and the filter 100 for a communication device according to the first embodiment of the present invention will be explained as follows.

[0070] First, in the case of the filter 100 for a communication device according to the first embodiment of the present invention, the body bottom forming panel 110 that forms the bottom of the cavity C is formed as a single panel that is not separated, whereas in the case of the filter 1100 for a communication device according to the second embodiment of the present invention, the body bottom forming panels 1110A, 1110B that form the bottom of the cavity C are provided so as to be separated into two in the width direction of the cavity C, and multiple resonators 1170 can be formed integrally at one side end of the body bottom forming panels 1110A, 1110B without a separate resonator panel, so as to be foldable from one side end of each separated body bottom forming panel 1110A, 1110B toward the thickness direction of the cavity C.

[0071] The two separated body bottom forming panels 1110A and 1110B form the complete bottom of the cavity C when their outer ends abut against each other during the subsequent folding process.

[0072] In addition, in the filter 100 for a communication device according to the first embodiment of the present invention, the one-side thickness forming panel 120 and the other-side thickness forming panel 130 are respectively extended from one end and the other end of the width direction of the body bottom forming panel 110, and the one-side shielding panel 180A and the other-side shielding panel 180B are respectively extended from one end and the other end of the length direction of the body bottom forming panel 110, whereas in the case of the filter 1100 for a communication device according to the second embodiment of the present invention, the one-side thickness forming panel 1120 and the other-side thickness forming panel 1130 are respectively extended from the other end of the body bottom forming panels 1110A and 1110B so as to be able to be folded integrally, and the one-side thickness forming panel 1120 and the other-side thickness forming panel 1130 can be connected integrally via the other-side shielding panel 1180B.

[0073] In addition, in the case of the filter 1100 for communication equipment according to the second embodiment of the present invention, the body upper portion forming panel 1150 is integrally extended from the other end of the width direction of the one-side thickness forming panel 1120, opposite the end in the width direction where the body bottom portion forming panel 1110A is not formed, and the first one-side shielding panel 1180A-1 and the second one-side shielding panel 1180A-2 can be integrally formed so as to occupy half the area at one end and the other end in the longitudinal direction of the one-side thickness forming panel 1120 and the other-side thickness forming panel 1120, respectively, corresponding to the ends where the above-mentioned other-side shielding panel 1180B is not formed.

[0074] In particular, in the filter 1100 for a communication device according to the second embodiment of the present invention, a partition panel 1190 having at least one or more windows 1191, 1192 cut therein may be integrally formed at the longitudinal end of one of the side shielding panels 1180A-1, 1180A-2, thereby spatially dividing the cavity C into two on both sides in the width direction.

[0075] Meanwhile, in the filter 1100 for a communication device according to the second embodiment of the present invention, as shown in FIG. 14, the plurality of resonators 1170 formed integrally with the body bottom forming panels 1110A and 1110B include resonant characteristic ends 1173 in which each end of the resonant bar 1171 has a width wider than the other parts, and both ends of the width are wound in a round shape in the thickness direction on one side from the end of the other parts.

[0076] More specifically, the resonant characteristic ends 1173A, 1173B of the plurality of resonators 1170 can be spaced apart from each other by a predetermined distance at both ends of the width in the rounded state, as shown in FIGS. 14(a) and 14(b).

[0077] Furthermore, the resonant characteristic ends 1173A of the plurality of resonators 1170 may be formed to have at least one circular (see FIG. 14(b)) or semicircular horizontal cross section (see FIG. 14(a)).

[0078] In the filter 100 for a communication device according to the first embodiment of the present invention, the input terminal pin 175A and the output terminal pin 175B are each formed integrally with one of the resonators 170, and then during the folding process, they are fixedly installed by passing through the input port mounting portion 115A and the output port mounting portion 115B formed on the body bottom forming panel 110, whereas in the filter 1100 for a communication device according to the second embodiment of the present invention, the input terminal pin 1175A and the output terminal pin 1175B are provided separately and are fixedly installed by passing through the input port mounting portion 1115A formed on the first one-side shielding panel 1180A-1 and the output port mounting portion 1115B formed on the second one-side shielding panel 1180A-2, respectively.

[0079] The input terminal pin 1175A may be connected to an input port formed on a main board (not shown) and one of the plurality of resonators 1170 so that a signal transmitted from the input port is input, and the output terminal pin 1175B may be connected to an output port formed on a main board (not shown) and one of the plurality of resonators 1170 so that a signal is transmitted to and output from the output port.

[0080] On the other hand, in the second embodiment 1100, the folding method and sequence of the base plate 1105 are as shown in FIG.

[0081]

[0033] The filters 100 and 1100 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 should be understood that the embodiments of the present invention are not limited to the above-described embodiments, and that various modifications and variations within the scope of equivalents may be made by those skilled in the art. Therefore, the true scope of the present invention is defined by the claims that follow. [Industrial Applicability]

[0082] 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]

[0083] 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, 1100: Second embodiment 1110A: one side body bottom forming panel, 1110B: other side body bottom forming panel 1120: One side thickness forming panel, 1130: Other side thickness forming panel 1150: Upper body forming panel, 1170: Multiple resonators 1180A-1: first one-side shielding panel, 1180A-2: second one-side shielding panel 1190: Partition panel

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 within the cavity; the plurality of resonators include a resonant characteristic end having a tip portion that is wider than the other portions, and both ends of the width being wound in a round shape from the tip of the other portions in one thickness direction.

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

3. 2. The filter for a communication device according to claim 1, wherein both ends of the width of the resonance characteristic ends of the plurality of resonators in a rounded state are spaced apart from each other by a predetermined distance.

4. 2. The filter for a communication device according to claim 1, wherein the resonance characteristic ends of the plurality of resonators are formed to have at least one circular or semicircular horizontal cross section.

5. 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 the base plate is made of a non-conductive material, a conductive material is coated by plating at least inside the cavity.

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

7. 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; The filter for a communication device according to claim 1 , further comprising: an upper body forming panel provided in a form covering an upper portion of the cavity.

8. The body bottom forming panel is a body bottom forming panel on one side that forms a bottom surface of one side of the cavity; an other-side body bottom forming panel that forms the other-side bottom portion of the cavity, 8. The filter for a communication device according to claim 7, wherein the one-side body bottom forming panel and the other-side body bottom forming panel form a complete bottom portion of the cavity after folding.

9. The base plate after folding is 8. The filter for a communication device according to claim 7, further comprising one-side shielding panel and another-side shielding panel for shielding one and the other longitudinal ends of the cavity.

10. The base plate is 9. The filter for a communication device according to claim 8, further comprising a plurality of resonators formed in the one-side body bottom forming panel and the other-side body bottom forming panel.

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