Filters for communication equipment and methods for manufacturing the same

Abstract

To provide a filter for communication equipment that is easy to manufacture and allows the entire product to be made slimmer and lighter. The filter for a communication device includes a single base plate made of a conductive plate material having a predetermined thickness or less, which forms an inner surface of a cavity for frequency filtering. The cavity is formed by folding at least a portion of the base plate.

Description

Technical Field

[0001] The present invention relates to a filter for a communication device and a manufacturing method thereof (FILTER FOR COMMUNICATION DEVICE AND MANUFACTURING METHOD FOR THE SAME), and more particularly, integrally manufactures each component of a single base material plate in a foldable manner, minimizes insertion loss due to the coupling process of internal structures of a cavity (for example, a resonator panel including a plurality of resonators), is easy to manufacture, and relates to a filter for a communication device and a manufacturing method thereof capable of manufacturing a slim antenna device product in the thickness direction.

Background Art

[0002] A radio frequency device such as a radio frequency filter (including all "communication devices") 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. 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 ends, and the plurality of resonance ends 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, conventional radio frequency filters have a very limiting problem in reducing the size of the finished filter in the thickness direction, as each resonator extends in the thickness direction within the cavity, and the frequency is tuned by adjusting the distance between the resonator and a part of the filter tuning cover that covers the cavity by deforming it using a stamping method to achieve the desired bandpass characteristics.

[0005] Furthermore, conventional radio frequency filters require the addition of conductive material components to achieve inductive or capacitive coupling in order to enhance the skirt characteristics between adjacent or spaced-out resonators within multiple cavities, which has been pointed out as a problem that significantly increases 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 and a method for manufacturing the same that can reduce insertion loss due to the coupling of two physical structures by minimizing the conventional bonding 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 and a method for manufacturing the same, which can improve the reliability of the product by reinforcing the bonding rigidity to the filter, which is provided by a folding method of a relatively low-rigidity thin base plate.

[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 single base plate made of a conductive plate material of a predetermined thickness or less that forms the inner surface of a cavity for frequency filtering, wherein the cavity is formed by folding at least a portion of the base plate.

[0012] Here, the base plate may include a body bottom forming panel that forms the bottom surface of the cavity; a lower one-side thickness forming panel and a lower other-side thickness forming panel that are folded in the same direction at one end and the other end in the width direction of the body bottom forming panel to form a part of the cavity; a frequency tuning panel that includes a plurality of tuning bars, the other end of which is integrally connected to the folded lower other-side thickness forming panel, and the one end of which is folded so as to be connected to the upper end of the folded lower one-side thickness forming panel, and which forms different single layers separated by a predetermined distance in the thickness direction from a single layer formed by a plurality of resonators in the cavity; and a body upper forming panel, the one end of which is folded via an upper one-side thickness forming panel and the other end of which is folded via an upper other-side thickness forming panel, and the other end of which is connected to the one end of the frequency tuning panel in the width direction and the upper end of the lower other-side thickness forming panel, so as to be separated by a predetermined distance from the plurality of tuning bars in the thickness direction of the cavity.

[0013] Furthermore, the base plate may further include a resonator panel containing the plurality of resonators that extend perpendicularly to the folded lower one-sided thickness-forming panel and the lower other-sided thickness-forming panel, forming a single layer within the cavity.

[0014] Furthermore, the resonator panel can be coupled and installed in a plurality of resonator panel mounting slits formed so that either one of the lower one-side thickness-forming panel and the lower other-side thickness-forming panel penetrates the inside and outside of the cavity.

[0015] Furthermore, the resonator panel may include a resonator connecting bar that horizontally connects the plurality of resonators in the longitudinal direction of the cavity, a plurality of insertion ends provided at the outer end of the resonator connecting bar and inserted into the resonator panel mounting slit, and resonant characteristic ends extended from the tip of each of the plurality of resonators.

[0016] Furthermore, the multiple insertion ends may be joined together by either a brazing method or a welding method after being inserted into the multiple resonator panel mounting slits.

[0017] Furthermore, at least two of the body bottom forming panel, the lower one-side thickness forming panel, the lower other-side thickness forming panel, the resonator panel, the frequency tuning panel, the upper one-side thickness forming panel, the upper other-side thickness forming panel, and the body upper forming panel can be positioned on the same horizontal plane when fully unfolded.

[0018] Furthermore, it may include a one-side shielding panel integrally formed at one longitudinal end of the body bottom forming panel and folded, having three sides connected to the longitudinal end of the lower one-side thickness forming panel in its folded state, the longitudinal end of the lower other-side thickness forming panel in its folded state, and the longitudinal end of the frequency tuning panel in its folded state, and a other-side shielding panel integrally formed at the other longitudinal end of the body bottom forming panel and folded, having three sides connected to the longitudinal end of the lower one-side thickness forming panel in its folded state, the longitudinal end of the lower other-side thickness forming panel in its folded state, and the longitudinal end of the frequency tuning panel in its folded state.

[0019] Furthermore, the frequency tuning panel can be integrally formed with one of the lower one-side thickness-forming panel and the lower other-side thickness-forming panel, to which the resonator panel is coupled.

[0020] Furthermore, the frequency tuning panel is formed as a hollow frame that extends vertically through a rectangular shape, and the plurality of tuning bars can be extended on the frequency tuning panel so as to extend from one inner end in the width direction to the other inner end in the width direction and form a single layer in the thickness direction of the cavity.

[0021] Furthermore, the frequency tuning panel can be extended to a length that overlaps the thickness direction of the cavity with the multiple resonators, each of which is provided with a different single layer of tuning bars.

[0022] Furthermore, the frequency tuning panel can be further extended by a plurality of coupling adjustment bars that extend from one inner end in the width direction to the other inner end in the width direction, and that form a single layer identical to the plurality of tuning bars between adjacent tuning bars.

[0023] In addition, the plurality of coupling adjustment bars extend from the inner end on one side in the width direction of the frequency tuning panel and can be connected to the inner end on the other side in the width direction.

[0024] Moreover, pinholes penetrating in the vertical direction are formed in the body bottom forming panel, the plurality of resonators, and the body upper forming panel, and support pins penetrating the respective pinholes can be installed when folding the base material plate for forming the cavity.

[0025] In addition, the base material plate forms a filter body having the cavity inside by a folding process, and the filter body is disposed between a PA board and an antenna board on which a plurality of radiation elements are arranged on the front surface. The filter body further includes an input connector portion for inputting a predetermined electrical signal transmitted from the PA board to one side of the cavity, and an output connector portion for receiving a predetermined electrical signal transmitted from the other side of the cavity and outputting the signal to the antenna board. The output connector portion can include a supporting housing in which the vertical pressure acting when the antenna board is laminated and coupled to the front surface of the filter body is transmitted to the PA board without being transmitted to the filter body.

[0026] In addition, the supporting housing may be formed in a hollow cylindrical shape that penetrates the rear surface portion and the front surface portion of the cavity in the thickness direction, the rear end portion is connected to the front surface of the PA board, and the front end portion is connected to the rear surface of the antenna board.

[0027] In addition, the supporting housing may be made of a rigid material having a higher strength than the filter body.

[0028] Further, the output connector portion may further include a plurality of solder pins extending rearward from the rear end portion of the supporting housing and inserted into the PA board, a ground washer portion provided at the front end portion of the supporting housing for supporting the rear surface of the antenna board, and a coaxial connector provided in the empty space of the supporting housing for electrically connecting the output end of a resonator panel including a plurality of resonators provided in the cavity and the antenna board. [[ID=​​​​​​​​​​​​​A filter for communication equipment according to another embodiment of the present invention includes a single base plate that forms a cavity which is a dielectric-filled space, the base plate including a body bottom forming panel that forms the bottom surface of the cavity, a resonator panel including a plurality of resonators that form a single layer in the thickness direction within the cavity corresponding to the upper part of the body bottom forming panel, a frequency tuning panel including a plurality of tuning bars that form different single layers so as to be separated by a predetermined distance in the thickness direction from the single layer formed by the plurality of resonators within the cavity, and a body upper forming panel provided to cover the upper part of the frequency tuning panel and form the upper surface of the cavity, wherein the cavity is formed by the body bottom forming panel, the resonator panel, the frequency tuning panel and the body upper forming panel being connected and folded together via a lower one-side thickness forming panel, a lower other-side thickness forming panel, an upper one-side thickness forming panel and an upper other-side thickness forming panel that connect them in the thickness direction, and at least two of the body bottom forming panel, the resonator panel, the frequency tuning panel and the body upper forming panel are located on the same horizontal plane when fully unfolded.

[0033] A method for manufacturing a filter for communication equipment according to one embodiment of the present invention includes: a first folding step of folding a lower one-side thickness forming panel and a lower other-side thickness forming panel, which are integrally connected to one end and the other end in the width direction of a body bottom forming panel so as to form a part including the bottom surface of a cavity, in the same direction; a second folding step of folding a frequency tuning panel, which includes a plurality of tuning bars that form a predetermined single layer in the thickness direction within the cavity, after the first folding step, so as to form different single layers in the thickness direction within the cavity with a plurality of resonators that extend perpendicularly to the lower one-side thickness forming panel and the lower other-side thickness forming panel; and a third folding step of folding one end in the width direction of a body upper forming panel with the upper one-side thickness forming panel interposed therebetween, and folding the other end in the width direction of the body upper forming panel with the upper other-side thickness forming panel interposed therebetween, so as to be separated from the plurality of tuning bars by a predetermined distance in the thickness direction of the cavity. [Effects of the Invention]

[0034] According to one embodiment of the present invention, a filter for communication equipment and a method for manufacturing the same can achieve a variety of effects, including the following:

[0035] Firstly, by minimizing conventional joining (welding or brazing) methods for constructing structures within the cavity and enabling them to be built through a simple folding process, insertion losses caused by the application of joining methods can be reduced, thereby improving the reliability of communications.

[0036] Secondly, 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]

[0037] [Figure 1] This is a perspective view showing a filter for communication equipment according to one embodiment of the present invention. [Figure 2] Figure 1 is an exploded perspective view showing the input port and output port sections, which are connected to the filter for communication equipment, separated. [Figure 3A] Figure 1 is a downward exploded perspective view of a filter for communication equipment. [Figure 3B] Figure 1 is an exploded top perspective view of the communication equipment filter. [Figure 4] Figure 1 is an exploded view showing the base plate, which is part of the configuration of the filter for communication equipment. [Figure 5] This is an internal perspective view of Figure 1. [Figure 6] This is a fluoroscopic view of the incision along line AA in Figure 2. [Figure 7] Figure 1 shows a front view (a), a cross-sectional view along the BB line (b), and an incision oblique view (c). [Figure 8] Figure 1 shows a lateral view (a) and an incision perspective along the CC line. [Figure 9] This is a perspective view showing a modified example of the frequency tuning panel in the configuration of Figure 1. [Figure 10] This is a side view illustrating the function of the coupling adjustment bar in a modified configuration shown in Figure 9. [Figure 11A] This is a downward perspective view of the filter body, including the output connector section for reinforcing the rigidity of the base plate in the folded state, as shown in Figure 1. [Figure 11B] This is an overhead perspective view of the filter body, including the output connector section for reinforcing the rigidity of the base plate in the folded state, as shown in Figure 1. [Figure 12A] Figure 11A is an exploded perspective view. [Figure 12B] Figure 11B is an exploded perspective view. [Figure 13] This is a cross-sectional perspective view showing the internal space of the cavity. [Figure 14]This is a cross-sectional perspective view showing the internal space of the cavity. [Figure 15] This is a partially cut perspective view showing how the support pins are used during the folding process of the base plate, as shown in Figure 1. [Figure 16] This is a cross-sectional view showing how the filter body is coupled to the PA board. [Modes for carrying out the invention]

[0038] Hereinafter, a filter for communication equipment according to one embodiment of the present invention and a method for manufacturing the same will be described in detail with reference to the attached drawings.

[0039] 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.

[0040] 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.

[0041] Figure 1 is a perspective view showing a filter for communication equipment according to one embodiment of the present invention; Figure 2 is an exploded perspective view showing the input port and output port sections separated from the filter for communication equipment in Figure 1; Figures 3A and 3B are exploded perspective views of the filter for communication equipment in Figure 1, showing the lower and upper exploded perspective views, respectively; Figure 4 is an unfolded view showing the base plate among the components of the filter for communication equipment in Figure 1; Figure 5 is an internal perspective view of Figure 1; Figure 6 is a cut perspective view along line AA in Figure 2; Figure 7 is a front view (a), a cross-sectional view (b) along line BB, and a cut perspective view (c) of Figure 1; and Figure 8 is a side view (a) and a cut perspective view along line CC of Figure 1.

[0042] 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.

[0043] To filter such signals, a cavity filter, as its name suggests, forms a predetermined signal filtering section called a cavity 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 a specific bandwidth frequency signal value in the range desired by the consumer.

[0044] 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.

[0045] However, a filter 100 for communication equipment according to one embodiment of the present invention discloses a groundbreaking technical feature that minimizes insertion loss when a single flat base plate of no more than a predetermined thickness is processed into a sheet metal shape by a pressing process, and then the structures within the cavity (for example, a resonator panel 200 including multiple resonators 220) are joined by a folding process, thus escaping the above-described manufacturing method.

[0046] A filter 100 for communication equipment according to one embodiment of the present invention is manufactured in an unfolded state, as shown in Figures 1 to 4, and includes a base plate 105 that forms a cavity C inside when folded.

[0047] Here, the base plate 105 may be made of a conductive plate material of a predetermined thickness or less that forms the inner surface of the cavity C, which is a dielectric-filled space for frequency filtering. The predetermined thickness is preferably 3t or less, which is sufficient to form the cavity by the folding process, to firmly maintain the formed cavity, and to prevent an increase in weight.

[0048] On the other hand, cavity C can be formed by folding at least a portion of the base plate 105 (folding process).

[0049] In a filter 100 for communication equipment according to one embodiment of the present invention, the base plate 105 includes a body bottom forming panel 110, a lower one-side thickness forming panel 130 and a lower other-side thickness forming panel 120, a frequency tuning panel 140, and a body upper forming panel 150, as shown in Figures 1 to 4.

[0050] For the sake of explanation, the terms used below to indicate "space" and "position" will be explained assuming the cavity C is formed after folding the base plate 105. It should be made clear beforehand that all of the above-described components can be formed into sheet metal shapes in an unfolded form by a pressing process on the same plane before folding the base plate 105. This is also applicable to the communication equipment filter 100 according to other embodiments of the present invention, which will be described later.

[0051] More specifically, the body bottom forming panel 110 is configured to form the bottom surface of the cavity C after folding, and one connector mounting hole 115A and the other connector mounting hole 115B for connecting and installing the input connector section 300A and the output connector section 300B, which will be described later, can be formed in communication with the cavity C.

[0052] The lower one-sided thickness forming panel 130 and the lower other-sided thickness forming panel 120 are folded perpendicularly at the widthwise ends of the body bottom forming panel 110, which is long in the longitudinal direction and rectangular, to form one side wall in the widthwise direction of the cavity C, and can play a role in forming the thickness on the other side in the widthwise direction while forming the thickness on one side in the widthwise direction and the other side wall in the widthwise direction.

[0053] Here, the lower one-sided thickness forming panel 130 and the lower other-sided thickness forming panel 120 are preferably formed to be smaller than the widthwise size of the body bottom forming panel 110, so that when they are stacked in an antenna housing (not shown), the space occupied by the thickness in the front-to-back direction is further reduced, and they are provided in a slim shape in which the thickness is smaller than the widthwise size.

[0054] On the other hand, the frequency tuning panel 140 may be folded such that its other end in the width direction is connected to the upper end of the folded lower one-sided thickness forming panel 130, and may have multiple tuning bars 146 formed so as to be separated by a predetermined distance in the thickness direction from the single layer formed by the multiple resonators 220 described later within the cavity C.

[0055] In other words, as shown in Figure 4, the frequency tuning panel 140 may be formed to extend integrally with the lower other-side thickness forming panel 120 when unfolded, and may be folded so as to be perpendicular to the inward direction in which the cavity C is formed when folded.

[0056] Here, assuming that the frequency tuning panel 140 is formed as a hollow rectangular frame extending vertically through the frame, except for the edge ends formed along the edge, the plurality of tuning bars 146 formed on the frequency tuning panel 140 may be formed extending from the inner passage of either one of the widthwise end or the other end of the cavity C (in one embodiment of the present invention, the widthwise end adjacent to the lower one-sided thickness forming panel 130), extending horizontally and projecting a predetermined length toward the other widthwise end, and being formed spaced apart by a predetermined length in the longitudinal direction of the cavity C.

[0057] Such a frequency tuning panel 140 can be extended to a length that overlaps in the thickness direction of the cavity C with multiple resonators 220, each having multiple tuning bars 146, each provided in a different single layer.

[0058] On the other hand, the frequency tuning panel 140 may further include an L-notch section 141 that forms an inductively coupled notch (hereinafter referred to as "L-notch") at the right end (high frequency region) of the passband, as shown in Figure 4, and a C-notch section 142 that forms a capacitively coupled notch (hereinafter referred to as "C-notch") at the left end (low frequency region) of the passband.

[0059] The L-notch portion 141 and the C-notch portion 142 may form the same single layer in the thickness direction of the cavity C and form the same single layer as the plurality of tuning bars 146 that are pre-formed on the frequency tuning panel 140. However, the L-notch portion 141 and the C-notch portion 142 may be provided to form a different single layer within the cavity C from the plurality of resonators 220 of the resonator panel 200, which will be described later.

[0060] Furthermore, as shown in Figure 4, the frequency tuning panel 140 may have a plurality of coupling adjustment bars 147 formed between a plurality of pre-formed tuning bars 146 that are formed on the inside of one end in the width direction and spaced a predetermined distance apart in the longitudinal direction.

[0061] The multiple coupling adjustment bars 147 can adjust the coupling value between adjacent resonators 220 by deforming in shape and positioning themselves between the multiple resonators 220 formed on the resonator panel 200, which will be described later.

[0062] On the other hand, one mounting rib 149A and the other mounting rib 149B may be further formed at both longitudinal ends of the frequency tuning panel 140, protruding outward so as to be supported in the thickness direction of the cavity C by interference with the one-side shielding panel 180A and the other-side shielding panel 180B, which will be described later.

[0063] In addition, the upper body forming panel 150 is folded so as to shield the upper surface of the cavity C from the outside, and plays a role in forming the upper inner surface of the cavity C.

[0064] Here, the upper body forming panel 150 may be positioned parallel to the top of the frequency tuning panel 140, which is folded and arranged to form at least a single layer within the cavity C, at a predetermined distance apart.

[0065] For this purpose, an upper one-side thickness forming panel 161 may be integrally formed between one end in the width direction of the upper body forming panel 150 and the frequency tuning panel 140 to connect them, and an upper other-side thickness forming panel 162 may be integrally formed at the other end in the width direction of the upper body forming panel 150.

[0066] The upper one-sided thickness forming panel 161 is folded upward perpendicular to the inward direction relative to one end in the width direction of the frequency tuning panel 140, and the upper other-sided thickness forming panel 162 is folded downward perpendicular to the inward direction relative to the other end in the width direction of the upper body forming panel 150, and its lower end may be connected to the upper end of the lower other-sided thickness forming panel 120.

[0067] On the other hand, in a filter 100 for communication equipment according to one embodiment of the present invention, the base plate 105 may further include a resonator panel 200 equipped with a plurality of resonators 220.

[0068] The resonator panel 200 is provided separately and may be bonded to the base plate 105 by forming a different single layer at a predetermined distance in the thickness direction from the single layer formed by the multiple tuning bars 146 of the frequency tuning panel 140, via a plurality of resonator panel mounting slits 129h formed in either the lower one-side thickness-forming panel 130 or the lower other-side thickness-forming panel 120.

[0069] More specifically, the resonator panel 200 may include multiple resonators 220 that are folded inward perpendicular to the folded lower one-sided thickness-forming panel 130 and lower other-sided thickness-forming panel 120, as shown in Figures 1 to 4, to form a single layer within the cavity C.

[0070] The resonator panel 200 can be coupled and installed in one of the lower one-sided thickness-forming panel 130 and the lower other-sided thickness-forming panel 120, which are formed to penetrate the inside and outside of the cavity C.

[0071] Here, the resonator panel 200 may include, as shown in Figure 3A, a resonator connecting bar 210 that horizontally connects a plurality of resonators 220 in the longitudinal direction of the cavity C, a plurality of insertion ends 215 provided at the outer ends of the resonator connecting bar 210 and inserted into the resonator panel mounting slit 129h, and resonant characteristic ends 230 that are extended and formed at the ends of each of the plurality of resonators 220.

[0072] On the other hand, the multiple insertion ends 215 provided at the outer end of the resonator connecting bar 210 may be inserted into the multiple resonator panel mounting slits 129h from the inside where the cavity C is provided, and then joined by either a brazing method or a welding method.

[0073] Here, the base plate 105 may further include a one-side shielding panel 180A, which is integrally formed and folded at one longitudinal end of the body bottom forming panel 110 as shown in Figures 1 to 4, and has three sides connected to one longitudinal end of the lower one-side thickness forming panel 130, one longitudinal end of the lower other-side thickness forming panel 120, and one longitudinal end of the frequency tuning panel 200, respectively when folded; and a other-side shielding panel 180B, which is integrally formed and folded at the other longitudinal end of the body bottom forming panel 110, and has three sides connected to the other longitudinal end of the lower one-side thickness forming panel 130, the other longitudinal end of the lower other-side thickness forming panel 120, and the other longitudinal end of the frequency tuning panel 140, respectively when folded.

[0074] On the other hand, as shown in Figures 1 to 4, the one-sided shielding panel 180A and the other-sided shielding panel 180B may have one-sided rib through-slits 189A and 189B into which the one-sided mounting rib 149A and the other-sided mounting rib 149B, which are formed at both longitudinal ends of the frequency tuning panel 140, are inserted.

[0075] In a filter 100 for communication equipment according to one embodiment of the present invention, the one-side shielding panel 180A and the other-side shielding panel 180B are defined as having three sides, in that the vertical cross-sectional shape of the base plate 105 in the folded state is formed as a rectangle including the surface occupied by the body bottom forming panel 110. However, they are not limited to this, and can be understood as having sides corresponding to the shape of the vertical cross-section formed by the cavity C. For example, if the vertical cross-sectional shape of the cavity C is triangular, the one-side shielding panel 180A and the other-side shielding panel 180B can have two sides, being triangular in shape excluding the side (surface) occupied by the body bottom forming panel 110.

[0076] Figure 9 is a perspective view showing a modified version of the frequency tuning panel in the configuration of Figure 1, and Figure 10 is a side view illustrating the function of the coupling adjustment bar in the modified configuration of Figure 9.

[0077] As described above, the frequency tuning panel 140 can be further extended by a plurality of coupling adjustment bars 147 that extend from one inner end in the width direction to the other inner end in the width direction and form a single layer identical to the plurality of tuning bars 146 between adjacent tuning bars 146.

[0078] Here, the multiple coupling adjustment bars 147 shown in Figures 5 to 8 are formed to extend from the inner end of one end in the width direction of the frequency tuning panel 140 and to extend less than the tips of at least the multiple tuning bars 146. However, as shown in Figures 9 and 10, the multiple coupling adjustment bars 147 formed in the modified frequency tuning panel 140 may be provided to extend from the inner end of one end in the width direction of the frequency tuning panel 140 and to be connected to the inner end of the other end in the width direction.

[0079] As shown in Figure 10, the coupling adjustment bar 147 of the frequency tuning panel 140, modified in the manner described above, can be deformed from the top to the bottom in the thickness direction of the cavity C by a designer tuning the fine frequencies within the cavity C, thereby interfering with the adjacent resonators 220 in the signal path, and thus adjusting the coupling value.

[0080] On the other hand, a filter 100 for communication equipment according to one embodiment of the present invention may further include a plurality of tuning holes 151 and notch adjustment holes 152 formed in the upper body forming panel 150 and communicating with the cavity C, as shown in Figures 1 to 8.

[0081] Multiple tuning holes 151 are formed at positions corresponding to multiple tuning bars 146 provided inside the cavity C. By inserting a predetermined tuning tool (not shown) through the multiple tuning bars 146 and deforming the shape of the multiple tuning bars 146, fine frequencies can be tuned by adjusting the separation distance between them and multiple resonators 220 provided in different single layers.

[0082] Furthermore, the multiple notch adjustment holes 152 are formed at positions corresponding to the L-notch portion 141 and C-notch portion 142, which are provided to form a single layer inside the cavity C. By inserting a predetermined coupling adjustment tool (not shown) through the multiple notch adjustment holes 152, the shape of either the L-notch portion 141 or the C-notch portion 142 can be deformed to achieve the desired passband notch according to the design value.

[0083] Figures 11A and 11B are downward and upward perspective views of the filter body, including the output connector section for reinforcing the rigidity of the base plate in the folded state as shown in Figure 1; Figures 12A and 12B are exploded perspective views of Figures 11A and 11B; Figures 13 and 14 are cutaway perspective views showing the internal space of the cavity; Figure 15 is a partial cutaway perspective view showing how the support pins are used during the folding process of the base plate as shown in Figure 1; and Figure 16 is a cross-sectional view showing how the filter body is connected to the PA board.

[0084] Referring to Figures 11A, 11B to 16, in a filter 100 for communication equipment according to one embodiment of the present invention, the base plate 105 forms a filter body having the cavity C inside by a folding process, and the filter body is positioned between a PA board (PCB) and an antenna board (not shown) on which a plurality of radiating elements are arranged on the front, and may further include input connector sections 300A, 1300A that input a predetermined electrical signal transmitted from the PA board (PCB) to one side of the cavity C, and output connector sections 300B, 1300B that receive a predetermined electrical signal transmitted from the other side of the cavity C and output it to the antenna board.

[0085] As shown in Figure 12B, the input connector sections 300A and 1300A may include a Teflon® section 1310A interposed in the input connector mounting hole 115A, and a connecting pin 1330A that penetrates the Teflon section 1310A and connects to one of the multiple resonators 200 inside the cavity C.

[0086] On the other hand, the output connectors 300B and 1300B may be provided with the same configuration as the input connectors 300A and 1300A, but as will be described later, they can be modified and installed in a way that minimizes the transmission of external forces between the antenna board and the filter body.

[0087] More specifically, the output connector section 1300B may include a supporting housing 1310B, as shown in Figures 11A, 11B to 16, which transmits the vertical pressure acting on the filter body of the antenna board during lamination bonding to the front surface to the PA board (PCB) without being transmitted to the filter body.

[0088] The supporting housing 1310B may be formed as a hollow cylindrical shape that penetrates the entire rear and front portions of the cavity C (limited to cases where the antenna board is located in front and the PA board (PCB) is located in rear) in the thickness direction, with its rear end connected to the front of the PA board (PCB) and its front end connected to the rear of the antenna board.

[0089] Furthermore, it is preferable that the supporting housing 1310B be made of a rigid material with even greater strength than the filter body.

[0090] Therefore, when laminating and bonding the antenna board to the front of the filter body, the external force transmitted from the assembler or automated assembly jig (etc.) is relatively thin (3t or less) and slim, so that it is not transmitted to the less rigid filter body, but is immediately transmitted to the PA board (PCB), thereby providing the advantage of preventing deformation of the shape during assembly.

[0091] Here, the output connector section 1300B may include a plurality of solder pins 1320B extending rearward from the rear end of the supporting housing 1310B and inserted into the PA board (PCB), a ground washer section 1350B provided at the front end of the supporting housing 1310B to support the rear surface of the antenna board, and a coaxial connector 1330B provided in the empty space of the supporting housing 1310B to electrically connect the output terminal 240 of the resonator panel 200, which includes a plurality of resonators 220 provided in the cavity C, to the antenna board.

[0092] The coaxial connector 1330B includes terminal pins (not shown in the drawing reference numerals) for electrical connection to the antenna board, and a connector 1340B can be formed in the supporting housing 1310B for insertion of the output terminal 240 of the resonator panel 200 described above.

[0093] On the other hand, the output connector section 1300B can be soldered after multiple solder pins 1320B are inserted into the front surface of the PA board (PCB), as shown in Figure 16.

[0094] Here, a board separation portion 1360B may be formed at the rear end of the supporting housing 1310B, as shown in Figure 16, between a plurality of solder pins 1320B to separate the rear surface of the filter body from the PA board (PCB) by a predetermined distance.

[0095] Therefore, the board separation portion 1360B separates the filter body from the PA board (PCB) (see the drawing reference numeral "L" in Figure 16), which provides the advantage of being able to utilize both sides of the PA board (PCB) provided on a typical printed circuit board without restriction.

[0096] On the other hand, it is preferable that the input connector section 1300A is provided so as to be coupled to the front surface of the PA board (PCB) using the SMT method when the multiple solder pins 1320B of the output connector section 1300B are inserted into the front surface of the PA board (PCB).

[0097] On the other hand, as shown in Figure 15, the body bottom forming panel 110, the multiple resonators 220, and the body upper forming panel 150 each have vertically penetrating pinholes 116h, 236h, and 156h, respectively, and support pins 400 can be installed through each pinhole 116h, 236h, and 156h when folding the base plate 105 for forming the cavity C. That is, the support pins 400 are inserted into each pinhole 116h, 236h, and 156h so that each part is folded to the correct position during the folding process, and are removed once the folding process is complete, so as not to affect the frequency filtering and tuning within the cavity C.

[0098] A method for manufacturing a filter for communication equipment according to one embodiment of the present invention is described below.

[0099] In other words, a method for manufacturing a filter for communication equipment according to one embodiment of the present invention, as shown in Figures 1 to 16, involves a first folding step in which a lower one-side thickness forming panel 130 and a lower other-side thickness forming panel 120, which are integrally connected to one end and the other end in the width direction of a body bottom forming panel 110 so as to form a part including the bottom surface of the cavity C, are folded in the same direction; and after the first folding step, a frequency tuning panel 140 including a plurality of tuning bars 146 that form a predetermined single layer in the thickness direction within the cavity C is formed by a plurality of lower one-side thickness forming panel 130 and a lower other-side thickness forming panel 120 extending perpendicularly to each other. The second folding step involves folding the resonator 220 to form different single layers in the thickness direction within the cavity C, and the third folding step involves folding one end of the upper body forming panel 150 in the width direction with the upper one-side thickness forming panel 162 interposed therebetween, folding the other end of the upper body forming panel 150 in the width direction with the upper other-side thickness forming panel 161 interposed therebetween, and folding the other end in the width direction so as to be connected to one end of the frequency tuning panel 140 in the width direction and the upper end of the lower other-side thickness forming panel 120, so as to be separated by a predetermined distance from a plurality of tuning bars 146 in the thickness direction of the cavity C.

[0100] You can see that the detailed folding process for the remaining components may be carried out additionally by referring to Figure 4.

[0101] A filter for communication equipment and a method for manufacturing the same, according to one embodiment 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 the embodiment 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]

[0102] The present invention provides a filter for communication equipment and a method for manufacturing the same, which can reduce insertion loss due to the coupling of two physical structures by minimizing conventional bonding processes for forming cavities and providing structures such as resonators within the cavities. [Explanation of symbols]

[0103] 100: Filter for communication equipment, 105: Base plate 110: Body bottom forming panel, 120: Lower other side thickness forming panel 130: Lower one-sided thickness-forming panel, 140: Frequency tuning panel 146: Tuning bar, 147: Coupling adjustment bar 150: Upper body molding panel, 151: Tuning hole 152: Notch adjustment hole, 161: Upper other side thickness forming panel 162: Upper one-sided thickness-forming panel, 180A: One-sided shielding panel 180B: Other-side shielding panel, 200: Resonator panel 210: Resonator connecting bar, 220: Resonator 230: Resonator characteristic terminal, 300A, 1300A: Input connector section 300B, 1300B: Output connector section, 400: Support pin 1310B: Supporting housing section, 1320B: Solder pin 1330B: Coaxial connector, 1340B: Connector 1350B: Ground washer section, 1360B: Board separation section

Claims

1. It includes a single base plate made of a conductive plate material of a predetermined thickness or less that forms the inner surface of a cavity for frequency filtering, The cavity is formed by folding at least a portion of the base plate. The aforementioned base plate is A body bottom forming panel that forms the bottom surface of the cavity, The lower one-side thickness forming panel and the lower other-side thickness forming panel are folded in the same direction at one end and the other end in the width direction of the body bottom forming panel to form a part of the cavity, The other end in the width direction is integrally connected to the folded lower other-side thickness-forming panel, and one end in the width direction is folded so as to be connected to the upper end of the folded lower one-side thickness-forming panel, and the frequency tuning panel includes a plurality of tuning bars that form a single layer formed by a plurality of resonators within the cavity and a different single layer spaced a predetermined distance apart in the thickness direction, A filter for communication equipment, comprising a body upper forming panel, one end in the width direction folded via an upper one-side thickness forming panel, and the other end in the width direction folded via an upper other-side thickness forming panel, such that it is spaced a predetermined distance apart from the plurality of tuning bars in the thickness direction of the cavity, and the one end and the other end in the width direction are connected to the width direction one end of the frequency tuning panel and the upper end of the lower other-side thickness forming panel.

2. The filter for communication equipment according to claim 1, further comprising a resonator panel including the plurality of resonators that extend perpendicularly to the folded lower one-sided thickness-forming panel and the lower other-sided thickness-forming panel and form a single layer within the cavity.

3. The filter for communication equipment according to claim 2, wherein the resonator panel is coupled and installed in a plurality of resonator panel mounting slits formed so that one of the lower one-side thickness-forming panel and the lower other-side thickness-forming panel penetrates the inside and outside of the cavity.

4. The aforementioned resonant panel is, A resonator connecting bar horizontally connects the plurality of resonators in the longitudinal direction of the cavity, The resonator connecting bar has multiple insertion ends provided at its outer end, which are inserted into the resonator panel mounting slit, The filter for communication equipment according to claim 3, further comprising a resonant characteristic end extended from each of the multiple resonators.

5. The filter for communication equipment according to claim 4, wherein the plurality of insertion ends are inserted into the plurality of resonator panel mounting slits and then joined by either a brazing method or a welding method.

6. The filter for communication equipment according to claim 1, wherein at least two of the body bottom forming panel, the lower one-side thickness forming panel, the lower other-side thickness forming panel, the frequency tuning panel, the upper one-side thickness forming panel, the upper other-side thickness forming panel, and the body upper forming panel are located on the same horizontal plane when fully deployed.

7. A one-sided shielding panel having three sides that are integrally formed and folded at one longitudinal end of the body bottom forming panel, and that are connected to one longitudinal end of the lower one-sided thickness forming panel in the folded state, one longitudinal end of the lower other-sided thickness forming panel in the folded state, and one longitudinal end of the frequency tuning panel in the folded state, The filter for communication equipment according to claim 1, further comprising: an other-side shielding panel integrally formed with the other longitudinal end of the body bottom forming panel and folded, having three sides connected to the other longitudinal end of the lower one-side thickness forming panel in a folded state, the other longitudinal end of the lower other-side thickness forming panel in a folded state, and the other longitudinal end of the frequency tuning panel in a folded state.

8. The filter for communication equipment according to claim 2, wherein the frequency tuning panel is integrally formed with one of the lower one-side thickness-forming panel and the lower other-side thickness-forming panel, to which the resonator panel is coupled.

9. The frequency tuning panel is formed in a hollow frame shape with an opening that penetrates vertically in the thickness direction, The filter for communication equipment according to claim 8, wherein the frequency tuning panel is extended so that the plurality of tuning bars extend from one inner end in the width direction to the other inner end in the width direction and form a single layer.

10. The filter for communication equipment according to claim 9, wherein the frequency tuning panel is extended to a length that overlaps in the thickness direction of the plurality of resonators and the cavity, each having a plurality of tuning bars provided in a different single layer.

11. The filter for communication equipment according to claim 9, wherein the frequency tuning panel has a plurality of coupling adjustment bars that extend from one inner end in the width direction to the other inner end in the width direction and form a single layer identical to the plurality of tuning bars between adjacent tuning bars.

12. The filter for communication equipment according to claim 11, wherein the plurality of coupling adjustment bars extend from the inner end on one side in the width direction of the frequency tuning panel and are connected to the inner end on the other side in the width direction.

13. The body bottom forming panel, the plurality of resonators, and the body upper forming panel each have pinholes that penetrate in the vertical direction. The filter for communication equipment according to claim 10, wherein support pins can be installed through each of the pinholes when the base plate is folded to form the cavity.

14. The base plate is formed by a folding process to create a filter body having the cavity inside, and the filter body is positioned between the PA board and the antenna board on which a plurality of radiating elements are arranged on the front. An input connector section that inputs a predetermined electrical signal transmitted from the PA board to one side of the cavity, The system further includes an output connector that receives a predetermined electrical signal transmitted from the other side of the cavity and outputs it to the antenna board, The output connector portion includes a supporting housing that transmits the vertical pressure acting on the filter body of the antenna board when it is laminated to the front surface to the PA board without being transmitted to the filter body, according to claim 1, the filter for communication equipment.

15. The support housing is formed in a hollow cylindrical shape, penetrating the entire rear and front portions of the cavity in the thickness direction, with its rear end connected to the front surface of the PA board and its front end connected to the rear surface of the antenna board, as described in claim 14.

16. The filter for communication equipment according to claim 14, wherein the supporting housing is made of a rigid material having even greater strength than the filter body.

17. The output connector section is, A plurality of solder pins extending rearward from the rear end of the supporting housing and inserted into the PA board, A ground washer portion is provided at the front end of the supporting housing and supports the rear surface of the antenna board, The filter for communication equipment according to claim 16, further comprising: a coaxial connector that electrically connects the output terminal of a resonator panel, which includes a plurality of resonators provided in the cavity and located in the supporting housing, to the antenna board; and a coaxial connector that is provided in the empty space of the supporting housing.

18. The output connector portion is soldered together after the plurality of solder pins are inserted into the front surface of the PA board, as described in claim 17, for a communication equipment filter.

19. The filter for communication equipment according to claim 17, wherein a board separation portion is formed at the rear end of the supporting housing between the plurality of solder pins, thereby separating the rear surface of the filter body from the PA board by a predetermined distance.

20. The aforementioned input connector section is The filter for communication equipment according to claim 17, wherein when the plurality of solder pins of the output connector portion are inserted into the front surface of the PA board, they are coupled to the front surface of the PA board in an SMT manner.

21. It includes a single base plate that forms a cavity which is a dielectric-filled space, and a resonator panel that includes a plurality of resonators that form a single layer in the thickness direction within the cavity corresponding to the upper part of the body bottom forming panel, The aforementioned base plate is A body bottom forming panel that forms the bottom surface of the cavity, A frequency tuning panel including a plurality of tuning bars that form a single layer separated by a predetermined distance in the thickness direction from a single layer formed by a plurality of resonators within the cavity, It includes a body upper forming panel that covers the upper part of the frequency tuning panel and forms the upper surface of the cavity, A filter for communication equipment, wherein the cavity is formed by the body bottom forming panel, the frequency tuning panel, and the body upper forming panel being connected and folded together via a lower one-side thickness forming panel, a lower other-side thickness forming panel, an upper one-side thickness forming panel, and an upper other-side thickness forming panel, which connect each of them in the thickness direction, and at least two of the body bottom forming panel, the frequency tuning panel, and the body upper forming panel are located on the same horizontal plane when fully unfolded.

22. A first folding step involves folding a lower one-side thickness forming panel and a lower other-side thickness forming panel, which are integrally connected to one end and the other end in the width direction of the body bottom forming panel so as to form a portion including the bottom surface of the cavity, in the same direction. A second folding step is performed to fold the frequency tuning panel, which includes a plurality of tuning bars that form a predetermined single layer in the thickness direction within the cavity, so as to form a plurality of resonators extending perpendicularly to the lower one-side thickness-forming panel and the lower other-side thickness-forming panel, and different single layers in the thickness direction within the cavity. A method for manufacturing a filter for communication equipment, comprising: a third folding step, in which one end in the width direction of the upper body forming panel is folded with the upper one-side thickness forming panel interposed so that it is spaced a predetermined distance apart from the plurality of tuning bars in the thickness direction of the cavity; the other end in the width direction of the upper body forming panel is folded with the upper other-side thickness forming panel interposed and the other end in the width direction is folded so that it is connected to one end in the width direction of the frequency tuning panel and the upper end of the lower other-side thickness forming panel.

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