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 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 a 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 a 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) or a metal resonance element is provided inside a cavity such as a metallic cylinder or a rectangular parallelepiped surrounded by a conductor. Thereby, 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 related to a radio frequency filter 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, in a conventional radio frequency filter, each resonator extends in the thickness direction inside the cavity, and a part of a filter tuning cover that covers the cavity is deformed by a stamping method so as to have a desired band-pass characteristic, and the distance from the resonator is tuned. 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) 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 the 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 which is manufactured in an unfolded state and is foldable such that when folded, 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 in which the tip portion has a wider width than the other portion and both ends of the width are rounded in the thickness direction on one side from the tip of the other portion.

[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 resonant characteristic ends of the plurality of resonators are such that both ends of the rounded width can be separated from each other by a predetermined distance.

[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] 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.

[0016] Furthermore, the cavity may be filled with air having a dielectric constant of 1.

[0017] 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.

[0018] 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.

[0019] Furthermore, the base plate after folding may further include 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.

[0020] Furthermore, 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 present invention, the filter for communication equipment is designed so that the structure within the cavity can be constructed by a simple folding process without using conventional joining (welding or brazing) methods. This reduces the insertion loss caused by the application of joining methods, thereby improving the reliability of communication.

[0022] Furthermore, since the present invention allows for the formation of cavities using a thin base plate with a thickness of 3mm or less, it has the effect of reducing the overall thickness of the antenna device, thereby improving the weight reduction and slimming of the product. [Brief explanation of the drawing]

[0023] [Figure 1] Perspective view showing a filter for a communication device according to a first embodiment of the present invention. [Figure 2] Internal perspective view of FIG. 1. [Figure 3] Perspective view of the base plate in the configuration of FIG. 1 in a developed state. [Figure 4] Plan view of FIG. 3. [Figure 5] Exploded perspective view showing an example in which input terminal pins and output terminal pins are provided as separate components in the configuration of FIG. 1. [Figure 6] Cutaway perspective view (a, b) along line A - A. [Figure 7] 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] Perspective view showing a first realization example of a plurality of resonators in the configuration of FIG. 1. [Figure 9A] Perspective view showing a filter for a communication device according to a second embodiment of the present invention. [Figure 9B] Perspective view showing a filter for a communication device according to a second embodiment of the present invention. [Figure 10A] Internal perspective view of FIG. 9A. [Figure 10B] Internal perspective view of FIG. 9B. [Figure 11] Plan view of the base plate in the configuration of FIG. 9A. [Figure 12] Exploded perspective view showing an example in which input terminal pins and output terminal pins are provided as separate components in the configuration of FIG. 9A. [Figure 13] Cutaway perspective view of the state where a part of the upper plate forming portion in the configuration of FIG. 9A is removed along line D - D. [Figure 14] Perspective view showing various realization examples of a plurality of resonators in the configuration of FIG. 9A.

Mode for Carrying Out the Invention

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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 resulting value.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[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 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.

[0046] 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.

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

[0048] 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. On the other hand, the upper body forming panel 150 may have a frequency tuning bar (not shown) for fine frequency tuning by adjusting the separation distance from a plurality of resonators 170, which are 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, integrally cut into it.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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).

[0056] 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).

[0057] 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).

[0058] 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.

[0059] 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).

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 1100 of the present invention will be described in detail below.

[0064] 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 in which a part of the upper plate forming portion has been removed along the DD line; and Figure 14 is a perspective view showing various realization examples of multiple resonators in the configuration of Figure 9A.

[0065] In a second embodiment of the present invention, a filter 1100 for communication equipment, as shown in Figures 9A to 14, the base plate 1105 includes, after folding, a one-side body bottom forming panel 1110A that forms one side bottom surface of the cavity C, a other-side body bottom forming panel 1110B that forms the other side bottom surface of the cavity C, a one-side thickness forming panel 1120 and a other-side thickness forming panel 1130 that extend from the outer widthwise outer end of the one-side body bottom forming panel 1110A and the outer widthwise outer end of the other-side body bottom forming panel 1110B, respectively, and increase the thickness of the cavity C, and a first one-side shielding panel that extends from one longitudinal end of the one-side thickness forming panel 1120 and extends by half the widthwise length. The configuration may include: a 1180A-1; a second one-side shielding panel 1180A-2 extending from the other longitudinal end of the other-side thickness forming panel 1130 and extending by half the width; a other-side shielding panel 1180B extending by the width so as to interconnect the other longitudinal end of the one-side thickness forming panel 1120 and the one longitudinal end of the other-side thickness forming panel 1130; and a body upper forming panel 1150 formed extending from the other widthwise end of the one-side thickness forming panel 1120, which has a one-side body bottom forming panel 1110A formed on it, and provided in a manner that covers the upper part of the cavity C, facing the one-side body bottom forming panel 1110A and the other-side body bottom forming panel 1110B.

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

[0067] More specifically, some (3) of the multiple resonators 1170 are formed at the outer end of one side body bottom forming panel 1110A and are provided to be bent at the bottom of a resonant cutout cut to a predetermined depth on the widthwise inward side of the one side body bottom forming panel 1110A, while the remaining (3) of the multiple resonators 1170 are formed at the outer end of the other side body bottom forming panel 1110B and are provided to be bent at the bottom of a resonant cutout cut to a predetermined depth on the widthwise inward side of the other side body bottom forming panel 1110B, and may be formed to protrude toward the upper body forming panel 1150 while forming two rows in the thickness direction within the cavity C.

[0068] In addition, the second embodiment of the present invention of the communication equipment filter 1100 may further include a partition panel 1190 provided at the outer end of either the first one-sided shielding panel 1180A-1 or the second one-sided shielding panel 1180A-2, which is folded inward into the cavity C during the folding process to spatially divide the cavity C into two sides in the width direction.

[0069] The differences between the communication equipment filter 1100 according to the second embodiment of the present invention, which has the configuration described above, and the communication equipment filter 100 according to the first embodiment of the present invention can be explained as follows.

[0070] First, in the case of the communication equipment filter 100 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, inseparable panel, whereas in the case of the communication equipment filter 1100 according to the second embodiment of the present invention, the body bottom forming panels 1110A and 1110B that form the bottom of the cavity C are provided to be separated into two in the width direction of the cavity C, and a plurality of resonators 1170 can be formed integrally on one side end of each separated body bottom forming panel 1110A and 1110B so as to be foldable toward the thickness direction of the cavity C from one side end of each body bottom forming panel 1110A and 1110B without providing a separate resonator panel.

[0071] The two separate body bottom forming panels, 1110A and 1110B, come into contact with each other at their outer ends during the subsequent folding process, forming the complete bottom surface of the cavity C.

[0072] In addition, in the first embodiment of the present invention, the filter 100 for communication equipment has one side thickness forming panel 120 and the other side thickness forming panel 130 extending from one end and the other end in the width direction of the body bottom forming panel 110, respectively, and one side shielding panel 180A and the other side shielding panel 180B extending from one end and the other end in the longitudinal direction of the body bottom forming panel 110, respectively. In contrast, in the second embodiment of the present invention, the filter 1100 for communication equipment has one side thickness forming panel 1120 and the other side thickness forming panel 1130 extending from the other end of the body bottom forming panels 1110A and 1110B so as to be foldable together, and the one side thickness forming panel 1120 and the other side thickness forming panel 1130 can be integrally connected via the other side shielding panel 1180B.

[0073] Furthermore, in the case of the communication equipment filter 1100 according to the second embodiment of the present invention, the body upper forming panel 1150 is integrally extended and formed at the other end in the width direction opposite to the body bottom forming panel 1110A that is not formed at both ends in the width direction of the one-side thickness forming panel 1120, and the first one-side shielding panel 1180A-1 and the second one-side shielding panel 1180A-2 can be integrally formed at the corresponding ends in the longitudinal direction of the one-side thickness forming panel 1120 and the other-side thickness forming panel 1120 that are not formed with the other-side shielding panel 1180B described above, respectively, so that they each occupy half of the area.

[0074] In particular, in the second embodiment of the present invention, a partition panel 1190 with at least one or more windows 1191 and 1192 cut out is integrally formed at the longitudinal end of any one of the one-sided shielding panels 1180A-1 and 1180A-2, so that the cavity C is spatially divided into two on both sides in the width direction.

[0075] On the other hand, in the second embodiment of the present invention, the filter 1100 for communication equipment, as shown in Figure 14, the plurality of resonators 1170 integrally formed on the body bottom forming panels 1110A and 1110B may include resonant characteristic ends 1173 in which each tip of the resonant bar 1171 has a wider width than the other parts, and both ends of that width are rounded in the thickness direction on one side from the tips of the other parts.

[0076] More specifically, the resonant characteristic ends 1173A and 1173B of the multiple resonators 1170 are such that the ends of the rounded width can be separated from each other by a predetermined distance, as shown in Figures 14(a) and (b).

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

[0078] 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 1175A and the output terminal pin 1175B are provided separately and fixed in place by passing through the input port mounting portion 1115A formed on the first side shielding panel 1180A-1 and the output port mounting portion 1115B formed on the second side shielding panel 1180A-2, respectively.

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

[0080] On the other hand, in the second embodiment 1100, the folding method and sequence of the base plate 1105 are as shown in Figure 11.

[0081] The communication equipment filters 100 and 1100 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 rights of the present invention is defined by the claims described later. [Industrial applicability]

[0082] 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]

[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 molding panel, 160: Resonator panel 170: Multiple resonators, 1100: Second embodiment 1110A: Body bottom forming panel on one side, 1110B: Body bottom forming panel on the other side 1120: Panel with thickness formed on one side, 1130: Panel with thickness formed on the other side 1150: Upper body molding panel, 1170: Multiple resonators 1180A-1: First side shielding panel, 1180A-2: Second side shielding panel 1190: Partition Panel

Claims

1. Includes a base plate made of a conductive material, which 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, The plurality of resonators include a resonant bar and a resonant characteristic end located at the tip of the resonant bar and having a wider width than the resonant bar. A filter for communication equipment, wherein the resonant characteristic ends of the plurality of resonators are formed to have at least one circular or semicircular horizontal cross-section.

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 resonant characteristic ends of the plurality of resonators are spaced a predetermined distance apart from each other in the width direction.

4. 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.

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

6. 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.

7. A base plate made of a conductive material, manufactured in an unfolded state, and foldable such that when folded, 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, The plurality of resonators include a resonant bar and a resonant characteristic end located at the tip of the resonant bar and having a wider width than the resonant bar. 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, Includes a body upper forming panel provided in a manner that covers the upper part of the cavity, 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 aforementioned one-sided body bottom forming panel and the aforementioned other-sided body bottom forming panel form the complete bottom surface of the cavity when folded, and are a filter for communication equipment.

8. The base plate after folding is The filter for communication equipment according to claim 6 or 7, 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.

9. The aforementioned base plate is The filter for communication equipment according to claim 7, further comprising a plurality of resonators formed on the one-side body bottom forming panel and the other-side body bottom forming panel.

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