Filters for communication equipment

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, when folded, position a plurality of resonators protruding a predetermined length in a thickness direction or width direction within the cavity. The plurality of resonators include a resonating characteristic end whose tip portion integrally connects the tips of a pair of other portions that extend from within the cavity in the thickness direction.

Description

Technical Field

[0001] The present invention relates to a filter for a communication device (FILTER FOR COMMUNICATION DEVICE), and more particularly, to a filter for a communication device that is easy to manufacture, can easily secure the usage area of a main board (or PA board), and can prevent an increase in the size of the entire antenna device in the thickness direction.

Background Art

[0002] A radio frequency device (including all "communication devices") such as a radio frequency filter is usually composed of a connection structure of a plurality of resonators. Such a resonator is a circuit element that resonates at a specific frequency by a combination of an inductor (L) and a capacitor (C) in terms of an equivalent electronic circuit. Each resonator has a structure in which a dielectric resonance element (DR: Dielectric Resonance element) or a metal resonance element is provided inside a cavity such as a metallic cylinder or a rectangular parallelepiped surrounded by a conductor. Thus, each resonator has a structure that enables high-frequency resonance by allowing only an electromagnetic field of a natural frequency according to a processing frequency band to exist in the cavity. Usually, a multi-stage structure is formed using a plurality of cavities to form a plurality of resonance terminals, and the plurality of resonance terminals are sequentially connected.

[0003] Examples of radio frequency filters having a plurality of cavity structures include those disclosed in Korean Patent Publication No. 10-2004-0100084 (Title: "Radio Frequency Filter", Publication Date: December 2, 2004) previously filed by the applicant of the present application.

[0004] However, a conventional radio frequency filter is provided with a part of a filter tuning cover that covers the cavity so that each resonator extends in the thickness direction within the cavity and the distance from the resonator is tuned by deforming the part by a stamping method to have desired band-pass characteristics. However, there are very restrictive problems in reducing the size of the completed filter in the thickness direction.

[0005] Furthermore, conventional radio frequency filters require the addition of conductive material to achieve inductive or capacitive coupling as part of enhancing the skirt characteristics between adjacent or spaced-out resonators within multiple cavities, but this has been criticized for significantly increasing the weight of the finished filter.

[0006] On the other hand, in recent years, research has been progressing in antenna devices to which Massive MIMO (Multiple Input Multiple Output) technology is applied, with the aim of minimizing the thickness of internal components such as filters in order to slim down the overall product. The most commonly used type of filter for this purpose is dielectric ceramic filter.

[0007] However, due to the material properties of dielectric ceramic filters, they have a problem in that they are bonded to one side of the main board (or PA board) that is laminated inside the antenna housing, which limits their use to both sides of the PCB (printed circuit board). [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The present invention has been made to solve the above technical problems, and aims to provide a filter for communication equipment that can reduce insertion loss due to the coupling of two physical structures by eliminating the conventional joining process for forming a cavity and providing a structure such as a resonator within the cavity.

[0009] Another objective of the present invention is to provide a filter for communication equipment that allows for the easy manufacture of the resonant characteristic ends of multiple resonators provided within a cavity using 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 communication equipment according to one embodiment of the present invention includes a base plate of a conductive material that is manufactured in an unfolded state and, when folded, is foldable such that it forms a cavity inside and simultaneously positions a plurality of resonators protruding for a predetermined length in the thickness or width direction inside the cavity, wherein the plurality of resonators include resonant characteristic ends whose tips integrally connect the tips of a pair of other portions that extend from inside the cavity in the thickness direction.

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

[0013] Furthermore, the plurality of resonators may include a pair of resonant bars corresponding to the other pair of parts, and a resonant characteristic end connecting the ends of the pair of resonant bars, wherein the pair of resonant bars may be formed such that their ends gradually separate as they extend in the thickness direction of the cavity.

[0014] Furthermore, the plurality of resonators may include a pair of resonant bars corresponding to the other pair of parts, and a resonant characteristic end connecting the ends of the pair of resonant bars, and the ends of the pair of resonant bars may be formed parallel to each other in the thickness direction of the cavity.

[0015] Furthermore, the plurality of resonators include a pair of resonant bars corresponding to the other pair of parts, and a resonant characteristic end connecting the tips of the pair of resonant bars, and the resonant characteristic end of the plurality of resonators may be formed to be at least the same width as, or larger than, the tips of the pair of resonant bars.

[0016] Furthermore, the plurality of resonators include a pair of resonant bars corresponding to the other part of the pair, and a resonant characteristic end connecting the tips of the pair of resonant bars, wherein the pair of resonant bars may be formed with the longest length between the base corresponding to the bottom surface of the cavity and the tip, and the shortest length at any one of the intermediate parts.

[0017] Furthermore, the base plate is 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 substance may be formed as a film in at least the interior corresponding to the cavity by a plating method.

[0018] Furthermore, the cavity may be filled with air having a dielectric constant of 1.

[0019] Furthermore, the base plate after folding may include a body bottom forming panel that forms the bottom surface of the cavity, a one-side thickness forming panel and a other-side thickness forming panel that increase the thickness of the cavity, and a body upper forming panel provided in a manner that covers the upper part of the cavity.

[0020] Furthermore, the body bottom forming panel includes a one-side body bottom forming panel that forms one side bottom surface of the cavity and a other-side body bottom forming panel that forms the other side bottom surface of the cavity, and the one-side body bottom forming panel and the other-side body bottom forming panel can form the complete bottom surface of the cavity after folding, excluding the portion where the resonator is formed.

[0021] Further, the base material plate after folding may further include a first shielding panel and a second shielding panel that shield one end and the other end in the longitudinal direction of the cavity.

[0022] Further, the plurality of resonators may be formed on the first body bottom forming panel and the second body bottom forming panel.

Advantages of the Invention

[0023] According to the filter for a communication device of the present invention, as a method for constructing a structure in a cavity, it is provided so that it can be formed by a simple folding process without using a conventional joining (welding or brazing) method. Therefore, the insertion loss generated by the application of the joining method can be reduced, and the effect of improving the reliability of communication is achieved.

[0024] Further, since the present invention can form a cavity using a thin base material plate of 3t or less, by reducing the size in the thickness direction of the entire product of the antenna device, the effects of reducing the weight and slimming down of the product can be achieved.

Brief Description of the Drawings

[0025] [Figure 1] It is a perspective view showing a filter for a communication device according to a first embodiment of the present invention. [Figure 2] It is an internal perspective view of FIG. 1. [Figure 3] It is a perspective view of the state where the base material plate in the configuration of FIG. 1 is unfolded. [Figure 4] It is a plan view of FIG. 3. [Figure 5] It is an exploded perspective view showing an embodiment in which input terminal pins and output terminal pins are provided separately in the configuration of FIG. 1. [Figure 6] It is a cutaway perspective view (a, b) along line A-A. [Figure 7] It is a cross-sectional view showing the fixing structure of the input terminal pin and the output terminal pin in the configuration of FIG. 1 and a partially enlarged plan view thereof. [Figure 8] This is a perspective view showing a first realization example of the configuration of multiple resonators in Figure 1. [Figure 9A] This is a perspective view showing a filter for communication equipment according to a second embodiment of the present invention. [Figure 9B] This is a perspective view showing a filter for communication equipment according to a second embodiment of the present invention. [Figure 10A] This is an internal perspective view of Figure 9A. [Figure 10B] This is an internal perspective view of Figure 9B. [Figure 11] This is a plan view of the base plate, one of the components in Figure 9A. [Figure 12] This is an exploded perspective view showing an embodiment in which the input terminal pins and output terminal pins are provided as separate components in the configuration of Figure 9A. [Figure 13] This is a cross-sectional perspective view of the configuration in Figure 9A, with a portion of the side plate forming section removed. [Figure 14] This is a perspective view showing various implementation examples of the configuration of multiple resonators in Figure 9A. [Figure 15A] This is a perspective view showing a filter for communication equipment according to a third embodiment of the present invention. [Figure 15B] This is a perspective view showing a filter for communication equipment according to a third embodiment of the present invention. [Figure 16A] This is an internal perspective view of Figure 15A. [Figure 16B] This is an internal perspective view of Figure 15B. [Figure 17] This is a plan view of the base plate in the configuration shown in Figure 15A. [Figure 18] This is an exploded perspective view showing an embodiment in which the input terminal pins and output terminal pins are provided as separate components, as shown in Figure 15A. [Figure 19] This is a cross-sectional perspective view of the configuration shown in Figure 15A, with a portion of the upper plate forming section removed. [Modes for carrying out the invention]

[0026] Hereinafter, a filter for communication equipment according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

[0027] When assigning reference numerals to the components in each drawing, it should be noted that, as far as possible, identical components should have the same reference numeral even if they are shown in other drawings. Furthermore, when describing embodiments of the present invention, if it is determined that a specific description of such known configurations or functions would hinder understanding of the embodiments of the present invention, such detailed description will be omitted.

[0028] In describing the components of the embodiments of the present invention, terms such as First, Second, A, B, (a), (b), etc., may be used. Such terms are merely for distinguishing a component from other components, and do not limit the nature, order, or procedure of that component. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the art to which the present invention pertains. Terms as defined in commonly used dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not in an ideal or overly formal sense unless explicitly defined in this application.

[0029] Figure 1 is a perspective view showing a filter for communication equipment according to a first embodiment of the present invention; Figure 2 is an internal perspective view of Figure 1; Figure 3 is a perspective view of the configuration of Figure 1 with the base plate unfolded; Figure 4 is a plan view of Figure 3; Figure 5 is an exploded perspective view showing an embodiment of the configuration of Figure 1 in which the input terminal pins and output terminal pins are provided as separate components; Figure 6 is a cut perspective view (a, b) along line AA; Figure 7 is a partially enlarged view of a cross-sectional view and its plan view showing the fixing structure of the input terminal pins and output terminal pins in the configuration of Figure 1; and Figure 8 is a perspective view showing a first realization example of multiple resonators in the configuration of Figure 1.

[0030] Generally, in the field of antenna technology, filters serve to filter out signals within a specific frequency band from the signals that must be input or output during the transmission and reception process, so that only the signal desired by the consumer (user) is obtained as the result.

[0031] To filter such signals, a cavity filter, as its name suggests, forms a cavity, which is a predetermined signal filtering section, between the input port where the signal is input and the output port where the signal is output. Through a frequency tuning process using the cavity, it obtains frequency signal values ​​in a specific band range desired by the consumer.

[0032] However, until now, the only method disclosed in the antenna equipment manufacturing industry for producing cavity filters was to manufacture the aforementioned cavity by processing the inside of a filter body made of ceramic material or a more rigid material, and then to manufacture the essential frequency filtering components, such as multiple resonators, separately and fix them inside the cavity.

[0033] However, the filter for communication equipment according to the embodiment of the present invention discloses a groundbreaking technical feature that allows a single flat base plate of no more than a predetermined thickness to be processed into a sheet metal shape, and then constructed by a folding process without using any other joining process. The specific technical features will be described below in the order of the embodiment.

[0034] A first embodiment of the present invention includes a base plate 105 made of a conductive material that is manufactured in an unfolded state and is foldable such that when folded, it forms a cavity C inside, and a plurality of resonators 170 protruding for a predetermined length in the thickness direction or width direction inside the cavity C.

[0035] The base plate 105 is preferably made of a conductive material, but it can also be made of a non-conductive material that is easy to manufacture. It should also be made clear in advance that a conductive substance can be formed on the inside and outside of the cavity C, or at least on the inside corresponding to the cavity C, by a plating method, so that the cavity C can perform its function.

[0036] However, as described later, the base plate 105 must maintain its shape continuously after being deformed by the folding process, unless an external force is applied. Therefore, it is preferable that it be made of a variable material that can be processed to suit this purpose.

[0037] Here, cavity C is a dielectric-filled space in which a dielectric having a predetermined dielectric constant is filled, and it means a space that is empty inside so that the dielectric can be filled. Air is also a type of dielectric with a dielectric constant of 1, so it should be made clear in advance that if air at atmospheric pressure is used as the dielectric, no other dielectric-filling process is required.

[0038] On the other hand, in the first embodiment of the present invention, the filter 100 for communication equipment, the base plate 105 plays a role in forming a cavity C, which is a dielectric filling space.

[0039] Here, the base plate 105 may include, as shown in Figures 3 and 4, a body bottom forming panel 110 that forms the bottom surface of the cavity C after folding; a one-side thickness forming panel 120 and a other-side thickness forming panel 130 that are planarly extended from one end and the other end of the body bottom forming panel 110 in the width direction to increase the width and increase the size of the cavity C in the thickness direction; a resonator panel 160 that extends from one end of either the one-side thickness forming panel 120 or the other-side thickness forming panel 130 and is provided with a plurality of resonators 170 that protrude into the cavity C corresponding to the upper part of the body bottom forming panel 110; and a body upper forming panel 150 that extends from the other end of the one-side thickness forming panel 120 or the other-side thickness forming panel 130 and is provided opposite the body bottom forming panel 110 and covering the upper part of the cavity C.

[0040] In addition, one-sided shielding panel 180A and the other-sided shielding panel 180B can be integrally formed on one and the other longitudinal ends of the body bottom forming panel 110, respectively, to shield the one and the other longitudinal ends where the cavity C is open.

[0041] Here, we will limit the description to the case where the one-sided shielding panel 180A and the other-sided shielding panel 180B are integrally formed on the body bottom forming panel 110, but it goes without saying that in some embodiments, they can also be integrally and symmetrically provided on adjacent panels (for example, the body upper forming panel 150). Furthermore, the one-sided shielding panel 180A and the other-sided shielding panel 180B can also be integrally formed on adjacent panels so as to be divided into two members, and can be provided so as to completely shield each open cavity C portion by folding.

[0042] On the other hand, the body bottom forming panel 110 may be provided with an input port mounting portion 115A and an output port mounting portion 115B that penetrate vertically through one end and the other end in the longitudinal direction, respectively. An input terminal pin 175A, described later, may be provided through the input port mounting portion 115A, and an output terminal pin 175B, described later, may be provided through the output port mounting portion 115B.

[0043] In particular, as shown in Figure 7, the input port mounting portion 115A and the output port mounting portion 115B may be formed as circular holes 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 inward into the cavity C for a predetermined length.

[0044] Here, a Teflon® 118 for impedance matching is interposed on the outer surface of the input terminal pin 175A or the output terminal pin 175B, and a fixing projection 117 having the shape of a stud or serration projection is integrally formed on the inner circumferential surface of the hole of the input port mounting portion 115A and the output port mounting portion 115B, which are equipped with a boss portion 116, for the stable fixing installation of the Teflon 118. This has the advantage of minimizing insertion loss by allowing the Teflon 118 to be crimped and inserted and stably fixed.

[0045] In addition, the base plate 105 may further include a notch-forming panel 140 that extends horizontally (or in the thickness direction) within the cavity C, provided between the upper body forming panel 150 connecting the one-sided thickness forming panel 120 and the other-sided thickness forming panel 130, and the resonator 170 of the resonator panel 160, as shown in Figures 3 and 4.

[0046] The notch-forming panel 140 has a shape corresponding to the shape around the cavity C, is provided in a frame shape that penetrates from top to bottom, and may have L-notch portions 141 and C-notch portions 142 in specific shapes at one internal end and the other internal end in the width direction, respectively.

[0047] Here, it goes without saying that the L-notch portion 141 and the C-notch portion 142 do not necessarily have to be provided on the notch forming panel 140, and can be integrally formed on the upper body forming panel 150, as long as their shape can be deformed inside the cavity C by the operator who will later perform frequency tuning.

[0048] As shown in Figures 3 and 4, if the notch forming panel 140 is provided simultaneously with the upper body forming panel 150, a one-sided separation panel 151 and a other-sided separation panel 152 may be further provided integrally with the base plate 105 to separate the notch forming panel 140 and the upper body forming panel 150 in the thickness direction within the cavity C.

[0049] 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 notch-forming panel 140, after the folding of the upper body forming panel 150 is complete.

[0050] Furthermore, the endpoint (other end) of the notch-forming panel 140, which corresponds to the lower end of the one-sided separation panel 151, can be welded to the upper surface of the portion that overlaps with the resonator panel 160 in the thickness direction after the folding of the resonator panel 160 is completed.

[0051] On the other hand, the upper body forming panel 150 may be integrally cut and formed to include a frequency tuning bar (not shown) for fine frequency tuning by adjusting the separation distance from a plurality of resonators 170 provided to form a single layer in the thickness direction inside the cavity C, and a plurality of coupling adjustment bars (not shown) that deform in shape directly below the plurality of resonators 170.

[0052] Furthermore, it goes without saying that tool insertion holes (not shown) can be formed through the upper body panel 150 so that the L-notch portion 141 and C-notch portion 142 described above can be reshaped using a predetermined tool.

[0053] Here, the multiple resonators 170 may be arranged to form a single, identical layer in the thickness direction of the cavity C, assuming, for example, that the cavity C generated by the folding of each part of the base plate 105 is long in the longitudinal direction and is formed as a slim rectangular parallelepiped with a relatively small size in the vertical thickness direction compared to the front-to-back width direction, as shown in Figures 2 to 7.

[0054] In addition, the L-notch portion 141 and 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.

[0055] In this case, the thickness of each single layer formed by the multiple resonators 170 and the L-notch portion 141 and C-notch portion 142 is precisely the thickness of the base plate 105, and is provided with a very slim thickness, thus offering the advantage that a slim design desired by the designer is possible without increasing the overall size, including the thickness of the product.

[0056] On the other hand, as shown in Figure 8, the multiple resonators 170 may include resonant characteristic ends 173 that are flat and wider so that their tips form the same layer as other parts within the cavity C. For the sake of explanation, the body portion of each component of the multiple resonators 170 that extends integrally from the base plate 105 and has a resonant characteristic end 173 connected to its tip will be distinguished and referred to as the resonant bar 171.

[0057] Here, at least one of the multiple resonators 170 may have an integrated 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 one of the multiple resonators 170 may have an integrated output terminal pin 175B connected to an output port (not shown) so that a signal is transmitted to and output from the output port.

[0058] On the other hand, the resonant characteristic ends 173 of the multiple resonators 170 may be integrally extended and angularly formed at the tip of the other part (resonant bar 171), as shown in Figure 8(a).

[0059] Furthermore, the resonant characteristic ends 173 of the multiple resonators 170 may be rounded and integrally formed at the tips of the other parts (resonant bars 171), as shown in Figure 8(b).

[0060] Finally, the resonant characteristic ends 173 of the multiple resonators 170 may be integrally extended to have a "U" shape that surrounds the tip of the other portion (resonant bar 171), as shown in Figure 8(c).

[0061] A brief description of the method for manufacturing a filter for communication equipment according to the first embodiment of the present invention, configured as described above, is as follows.

[0062] First, a base plate 105 made of a conductive or non-conductive material is prepared (base plate preparation step), then it is moved to a press die and pressed into a pre-designed shape (press sheet metal processing step).

[0063] At this time, as described above, it is preferable that the base plate 105 is sheet metal designed to form a cavity C shielded from the outside by a body bottom forming panel 110, a one-side thickness forming panel 120, a other-side thickness forming panel 130, a one-side shielding panel 180A and a other-side shielding panel 180B, a body upper forming panel 150 and other panels directly connected thereto (for example, a one-side separation panel 151 and a other-side separation panel 152) through a folding process described later.

[0064] In addition, after the base plate 105 has been press-formed using a sheet metal pressing process, if the material of the base plate 105 is non-conductive, an additional conductive coating process can be carried out to form a conductive coating on at least the entire interior of the cavity C, and then a folding process to form the cavity C can be carried out in sequence.

[0065] Here, the folding process involves folding the panels related to sequentially forming the cavity C from the bottom to the top, using the body bottom forming panel 110 as a reference, and folding the multiple resonators 170 formed on the resonator panel 160 so that they form the same layer (or a single layer) within the cavity C, while folding the L-notch portion 141 and C-notch portion 142 formed on the notch forming panel 140 so that they form a single layer different from the multiple resonators 170 inside the cavity C.

[0066] On the other hand, as long as the cavity C is formed by folding the base plate 105 (folding method), the embodiments of the communication equipment filter of the present invention are not necessarily limited to the first embodiment 100 described above. A second embodiment of the communication equipment filter 2100 of the present invention will be described in detail below.

[0067] Figures 9A and 9B are perspective views showing a filter for communication equipment according to a second embodiment of the present invention; Figures 10A and 10B are internal perspective views of Figures 9A and 9B; Figure 11 is a plan view of the base plate in the configuration of Figure 9A; Figure 12 is an exploded perspective view showing an embodiment in the configuration of Figure 9A in which the input terminal pins and output terminal pins are provided separately; Figure 13 is a cutaway perspective view of the configuration of Figure 9A with a part of the side plate forming portion removed; and Figure 14 is a perspective view showing various realization examples of multiple resonators in the configuration of Figure 9A.

[0068] In a second embodiment of the present invention, a filter 2100 for communication equipment, as shown in Figures 9A to 14, the base plate 2105 has, after folding, one side body bottom forming panels 2110A-1 and 2110A-2 which form the bottom surface of the cavity C and form one side bottom surface with respect to the middle in the width direction, and the other side body bottom forming panels 2110B-1 and 2110B-2 which form the other side bottom surface with respect to the middle in the width direction, and one side of the cavity C The cavity C may include a one-sided thickness-forming panel 2120 forming a side wall, a other-sided thickness-forming panel 2130 forming the other side wall of the cavity C, a one-sided shielding panel 2180A covering the open portion on one side of the cavity C, a other-sided shielding panel 2180B covering the open portion on the other side of the cavity C, a plurality of resonators 2170 formed protruding in the thickness direction from the bottom surface of the cavity C, and a partition panel 2190 separating the cavity C into two spaces in the width direction.

[0069] Here, the one-side body bottom forming panels 2110A-1 and 2110A-2 may include a first one-side body bottom forming panel 2110A-1 that forms the outer bottom portion of the cavity C with reference to the portion occupied by a part 2170-1 of the multiple resonators 2170, and a second one-side body bottom forming panel 2110A-2 that forms the inner bottom portion of the cavity C with reference to the portion occupied by a part 2170-1 of the multiple resonators 2170.

[0070] Furthermore, the other-side body bottom forming panels 2110B-1 and 2110B-2 may include a first other-side body bottom forming panel 2110B-1 that forms the outer bottom portion of the cavity C based on the portion occupied by the remaining 2170-2 of the multiple resonators 2170, and a second other-side body bottom forming panel 2110B-2 that forms the inner bottom portion of the cavity C based on the portion occupied by the remaining 2170-2 of the multiple resonators 2170.

[0071] In other words, the one-side body bottom forming panels 2110A-1 and 2110A-2 and the other-side body bottom forming panels 2110B-1 and 2110B-2 can form the complete bottom surface of the cavity C after folding, excluding the area where the resonator 2170 is formed.

[0072] In addition, the multiple resonators 2170 may include a first resonator 2170-1 provided between a first one-side body bottom forming panel 2110A-1 and a second one-side body bottom forming panel 2110A-2, and a second resonator 2170-2 provided between a first other-side body bottom forming panel 2110B-1 and a second other-side body bottom forming panel 2110B-2.

[0073] Specifically, the first resonator 2170-1 connects the first one-side body bottom forming panel 2110A-1 and the second one-side body bottom forming panel 2110A-2, and is formed to protrude upward in the thickness direction from the bottom surface of the cavity C when folded, and the second resonator 2170-2 connects the first other-side body bottom forming panel 2110B-1 and the second other-side body bottom forming panel 2110B-2, and is formed to protrude upward in the thickness direction from the bottom surface of the cavity C when folded.

[0074] More specifically, the body bottom forming panels 2110A-1, 2, 2110B-1, 2 that form the bottom of cavity C are each divided into four sections in the width direction, and between the two body bottom forming panels 2110A-1, 2110A-2 on one side in the width direction, a first resonator 2170-1 of the multiple resonators 2170 is integrally formed in a row in the longitudinal direction, and between the two body bottom forming panels 2110B-1, 2110B-2 on the other side in the width direction, a second resonator 2170-2 of the multiple resonators 2170 is integrally formed in a row in the longitudinal direction.

[0075] In addition, a partition panel 2190 may be integrally formed between the two body bottom forming panels 2110A-2 and 2110B-2 formed on the intermediate side of the body bottom forming panel 2110, separating the cavity C into two spaces in the width direction and having at least one or more windows 2191 cut out.

[0076] On the other hand, the body bottom forming panels 2110A-1 and 2110B-1, which are the outermost body bottom forming panels 2110 in the width direction, may have a one-side thickness forming panel 2120 and an other-side thickness forming panel 2130 integrally formed to form the thickness of the cavity C. In particular, a body upper forming panel 2150 which forms the upper part of the cavity C may be integrally formed on the outside of the other-side thickness forming panel 2130, and a one-side shielding panel 2180A and an other-side shielding panel 2180B may be integrally formed on one end and the other end in the longitudinal direction of the body upper forming panel 2150 to shield the open portions on one and the other side in the longitudinal direction of the cavity C.

[0077] Here, the upper body forming panel 2150 may also integrally form a plurality of tuning bars (not shown) for fine frequency tuning by adjusting the distance between the resonant characteristic ends 2173 of a plurality of resonators 2170 that are provided protruding from the bottom to the top of the cavity C, and a coupling adjustment bar (not shown) that changes shape between each resonator 2170 to adjust the coupling value.

[0078] On the other hand, as shown in Figure 14, a plurality of resonators 2170-1, 2170-2 integrally formed between one-side body bottom forming panels 2110A-1, 2110A-2 and the other-side body bottom forming panels 2110B-1, 2110B-2 may include a pair of resonant bars 2171 that extend upward from within the cavity C, aligned with adjacent body bottom forming panels 2110A-1, 2110A-2 or 2110B-1, 2110B-2, and resonant characteristic ends 2173 that mutually orthogonally connect the upper ends of a pair of resonant bars 2171a, 2171b.

[0079] More specifically, as shown in Figures 14(a), (c), and (d), the tips and bases of each of the pair of other parts (e.g., resonant bars 2171a, 2171b) associated with the resonant characteristic ends 2173A, 2173C, and 2173D of the multiple resonators 2170 may be formed parallel to each other and spaced apart, regardless of the height in the thickness direction of the cavity C.

[0080] Furthermore, as shown in Figure 14(b), the tips of a pair of other parts (e.g., resonant bars 2171a, 2171b) associated with the resonant characteristic ends 2173B of the multiple resonators 2170 may be formed to be gradually separated from each other as they extend from their bases toward the thickness direction of the cavity C.

[0081] Here, it goes without saying that the resonant characteristic ends 2173A to D of the multiple resonators 2170 may be formed to be the same width as (see Figure 14(c)) or larger than (see Figure 14(a), (b), and (d)) the tips of at least the pair of other parts (e.g., resonant bars 2171), as shown in Figures 14(a) to (d).

[0082] In addition, a pair of resonant bars 2171a and 2171b associated with the resonant characteristic ends 2173C of the multiple resonators 2170 may be formed so that their width gradually increases from the base to the tip, as shown in Figure 14(c), and a pair of resonant bars 2171a and 2171b associated with the resonant characteristic ends 2173D of the multiple resonators 2170 may be formed so that their width is longest at the base and tip, and the width is shortest at any one intermediate portion, as shown in Figure 14(d).

[0083] Furthermore, in the first embodiment of the present invention, the input terminal pin 175A and the output terminal pin 175B are each integrally formed on one of the resonators 170, and then fixed in place by passing through the input port mounting portion 115A and the output port mounting portion 115B formed on the body bottom forming panel 110 during the folding process. In contrast, in the second embodiment of the present invention, the input terminal pin 2175A and the output terminal pin 2175B are provided separately and fixed in place by passing through the input port mounting portion (not shown in the drawing) formed on the one-side thickness forming panel 2120 and the output port mounting portion (not shown in the drawing) formed on the other-side thickness forming panel 2130, respectively.

[0084] The input terminal pin 2175A is connected to one of the multiple resonators 2170 so that a signal transmitted from an input port formed on a main board (not shown) is input, and the output terminal pin 2175B may be connected to one of the multiple resonators 2170 so that a signal is transmitted to and output from an output port formed on a main board (not shown).

[0085] On the other hand, in the second embodiment of the present invention, the folding method and sequence of the base plate 2105 in the communication equipment filter 2100 is as shown in Figure 11.

[0086] Figures 15A and 15B are perspective views showing a filter for communication equipment according to a third embodiment of the present invention; Figures 16A and 16B are internal perspective views of Figures 15A and 15B; Figure 17 is a plan view of the base plate in the configuration of Figure 15A; Figure 18 is an exploded perspective view showing an embodiment in the configuration of Figure 15A in which the input terminal pins and output terminal pins are provided as separate components; and Figure 19 is a cut-out perspective view of the configuration of Figure 15A with a portion of the upper plate forming section removed.

[0087] In a third embodiment of the present invention, a filter 2200 for communication equipment, the base plate 2205 may include a body bottom forming panel 2210, a one-side thickness forming panel 2220 and a other-side thickness forming panel 2230, a one-side shielding panel 2280A and a other-side shielding panel 2280B, a plurality of resonators 2270, and partition panels 2290, as shown in Figures 15A to 19.

[0088] More specifically, the base plate 2205, after folding, consists of one-side body bottom forming panels 2210A-1 and 2210A-2 which form the bottom surface of cavity C and form one side bottom surface based on the midpoint in the longitudinal direction, other-side body bottom forming panels 2210B-1 and 2210B-2 which form the other side bottom surface based on the midpoint in the longitudinal direction, and one-side thickness forming panel 2220 which forms one side wall of cavity C, and cavity The cavity C may include an other-side thickness-forming panel 2230 forming the other side wall of the cavity C, a one-side shielding panel 2280A covering an open portion on one longitudinal side of the cavity C, an other-side shielding panel 2280B covering an open portion on the other longitudinal side of the cavity C, a plurality of resonators 2170 formed protruding in the thickness direction from the bottom surface of the cavity C, and a partition panel 2190 separating the cavity C into two spaces in the width direction.

[0089] In particular, when the one-side body bottom forming panels 2210A-1, 2 and the other-side body bottom forming panels 2210B-1, 2 that form the bottom of the cavity C are provided in four sections along the longitudinal direction, a portion 2270-1 of the multiple resonators 2270 is integrally provided so as to be formed in a single row in the width direction between the two body bottom forming panels on one side in the longitudinal direction (i.e., the first one-side body bottom forming panel 2210A-1 and the second one-side body bottom forming panel 2210A-2), and the other portion 2270- 2 is integrally provided so as to be formed in a row in the width direction between two body bottom forming panels in the longitudinal middle (i.e., the second first-side body bottom forming panel 2210A-2 and the second other-side body bottom forming panel 2210B-2), and the remaining 2270-3 of the plurality of resonators 2270 may be integrally provided so as to be formed in a row in the width direction between two body bottom forming panels on the other side in the longitudinal direction (i.e., the second other-side body bottom forming panel 2210B-1 and the first other-side body bottom forming panel 2210B-2). Thus, a total of six resonators 2270 can be arranged in 2 in 3 rows in the width direction and 3 in 2 rows in the longitudinal direction.

[0090] In addition, a one-side shielding panel 2280A is integrally formed at the outer end of the first one-side body bottom forming panel 2210A-1, which is formed on the outermost longitudinal side of the body bottom forming panel 2210, to shield one of the open portions on the other longitudinal side of the cavity C. A one-side thickness forming panel 2220 and a other-side thickness forming panel 2230 are integrally formed extending from both ends of the one-side shielding panel 2280A in the width direction, and two other-side shielding panels 2280B may be separated and integrally formed on the one-side thickness forming panel 2220 and the other-side thickness forming panel 2230, respectively, to shield the other longitudinally open side of the cavity C (i.e., see the first other-side shielding panel 2280B-1 and the second other-side shielding panel 2280B-2 in Figure 17).

[0091] On the other hand, a partition panel 2290 may be integrally formed at the outer end of any one of the other-side shielding panels 2280B (in the third embodiment 2200 of the present invention, this corresponds to the first other-side shielding panel 2280B-1). This partition panel 2290 separates the cavity C into two spaces, one on one side and the other, in the width direction, and has at least one window 2291, 2292 cut out.

[0092] In the third embodiment of the present invention, the folding method and sequence of the base plate 2205 in the communication equipment filter 2200 are as shown in Figure 17.

[0093] The communication equipment filters 100, 2100, and 2200 according to embodiments of the present invention have been described in detail above with reference to the attached drawings. However, the embodiments of the present invention are not necessarily limited to those described above, and it goes without saying that various modifications and equivalent implementations are possible by persons with ordinary skill in the art to which the present invention pertains. Therefore, the true scope of the present invention is defined by the claims described later. [Industrial applicability]

[0094] The present invention provides a filter for communication equipment that can reduce insertion loss due to the coupling of two physical structures by eliminating the conventional joining process for forming a cavity and providing a structure such as a resonator within the cavity. [Explanation of Symbols]

[0095] 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 molding panel, 160: Resonator panel 170: Multiple resonators, 2100: Second embodiment 2110A: Body bottom forming panel on one side, 2110B: Body bottom forming panel on the other side 2120: Panel with thickness formed on one side, 2130: Panel with thickness formed on the other side 2150: Upper body molding panel, 2170: Multiple resonators 2180A: One-sided shielding panel, 2180B: Other-sided shielding panel 2190: Partition panel, 2200: Third embodiment 2210A: Body bottom forming panel on one side, 2210B: Body bottom forming panel on the other side 2220: Panel with thickness formed on one side, 2230: Panel with thickness formed on the other side 2250: Upper body molding panel, 2270: Multiple resonators 2280A: One-sided shielding panel, 2280B-1: First other-sided shielding panel 2280B-2: Second other-side shielding panel

Claims

1. It includes a base plate made of a conductive material that is manufactured in an unfolded state and, when folded, is foldable such that it forms a cavity inside, and simultaneously positions a plurality of resonators protruding a predetermined length in the thickness direction inside the cavity, A filter for communication equipment, wherein the plurality of resonators include a pair of resonant bars extending in the thickness direction from within the cavity and a resonant characteristic end integrally connecting the ends of the pair of resonant bars.

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

3. The filter for communication equipment according to claim 1, wherein the pair of resonant bars are formed such that their respective ends gradually separate as they extend in the thickness direction of the cavity.

4. The filter for communication equipment according to claim 1, wherein the pair of resonant bars have their respective ends spaced parallel to each other in the thickness direction of the cavity.

5. The resonant characteristic ends of the plurality of resonators are formed to be the same as or larger than the width of at least the tip of the pair of resonant bars, as in the filter for communication equipment according to claim 1.

6. The filter for communication equipment according to claim 1, wherein the pair of resonant bars are formed with the longest width between the base portion corresponding to the bottom surface of the cavity and the tip portion, and the shortest width at any one of the intermediate portions.

7. The base plate is made of either a conductive material or a non-conductive material. The filter for communication equipment according to claim 1, wherein, if the base plate is made of a non-conductive material, a conductive substance is formed as a coating inside at least the cavity.

8. The filter for communication equipment according to claim 1, wherein the cavity is filled with air having a relative permittivity of 1.

9. The base plate after folding is A body bottom forming panel that forms the bottom surface of the cavity, A one-sided thickness-forming panel and a other-sided thickness-forming panel that increase the size of the cavity in the thickness direction, A filter for communication equipment according to claim 1, further comprising a body upper forming panel provided in a manner that covers the upper part of the cavity.

10. The body bottom forming panel is, A one-side body bottom forming panel that forms one side bottom surface of the cavity, It includes a panel forming the bottom surface of the other side of the body, which forms the bottom surface of the other side of the cavity. The filter for communication equipment according to claim 9, wherein the one-side body bottom forming panel and the other-side body bottom forming panel form the complete bottom surface of the cavity after folding, excluding the portion where the resonator is formed.

11. The base plate after folding is The filter for communication equipment according to claim 9, further comprising a one-side shielding panel and a other-side shielding panel that shield one end and the other end of the cavity in the longitudinal direction.

12. The aforementioned plurality of resonators are, A filter for communication equipment according to claim 10, formed on the one-side body bottom forming panel and the other-side body bottom forming panel.

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