CN221239781U - Filter for communication equipment - Google Patents

Abstract

The present utility model relates to a filter for a communication device, and more particularly, to a filter for a communication device including a single base plate and composed of a conductive plate material having a predetermined thickness or less and forming an inner surface of a cavity for performing frequency filtering, wherein the cavity is formed by folding at least a part of the base plate, thereby providing advantages that the manufacturing is facilitated and that the overall miniaturization and weight saving of a product can be pursued.

Description

Filter for communication equipment

Technical Field

The present utility model relates to a filter for a communication device and a method for manufacturing the same, and more particularly, to a filter for a communication device and a method for manufacturing the same, which can be manufactured in an integrated manner so that each structure of a single base plate can be folded, thereby minimizing insertion loss due to a bonding process of an internal structure of a cavity (a resonator plate including a plurality of resonators), and which can be manufactured easily, and which can be manufactured in an ultra-thin manner in a thickness direction of an antenna device product.

Background

Radio frequency devices (including all "communication devices") such as radio frequency filters are typically constructed from a connection structure of a plurality of resonators. Such a resonator is a loop device that resonates at a specific frequency by a combination of an inductor L and a capacitor C in an equivalent electronic loop, and each resonator has a structure in which a dielectric resonator device (DR: DIELECTRIC RESONANCE ELEMENT) or a metal resonator device is provided in a cavity (cavity) such as a metallic cylinder or a rectangular parallelepiped surrounded by a conductor. Accordingly, each resonator has a structure in which high-frequency resonance can be achieved by the presence of only an electromagnetic field based on the natural frequency of the processing frequency band in the corresponding cavity. In general, a multi-terminal structure in which a plurality of resonance terminals are formed using a plurality of cavities and the plurality of resonance terminals are sequentially connected is formed.

Examples of the RF filter having a plurality of cavity structures are disclosed in Korean laid-open patent publication No. 10-2004-0100084 (name: RF filter, publication date: 12/02/2004) filed by the applicant of the present application.

However, in the conventional rf filter, there is a problem in that the respective resonators are extended in the thickness direction in the cavity, and a part of the filter tuning cover covering the cavity so as to have a desired bandpass and characteristics is deformed by etching to adjust the distance from the resonators and to tune the frequency, and there is a limitation in reducing the size of the finished filter in the thickness direction.

In addition, in the conventional rf filter, in order to enhance skirt characteristics between adjacent resonators or between resonators spaced apart from each other in the plurality of cavities, it is necessary to provide a separate structure of a conductor material for exhibiting inductive coupling or capacitive coupling, and the weight of the finished filter is also problematic to be greatly increased.

Meanwhile, in recent antenna devices using a Massive MIMO (Multiple In-put Multiple Out-put) technology, in order to realize the ultra-thin production of the entire product, research is being conducted In the direction of minimizing the thickness of the internal structure such as a filter, and for this reason, the type of filter that is most used may be a dielectric ceramic filter.

However, the dielectric ceramic filter is limited in use to both sides of a Printed Circuit Board (PCB) because it is directly bonded to one side of a main board or a power amplifier board stacked in an antenna housing due to the characteristics of its material.

Prior art literature

Patent literature: publication No. 10-2004-0100084 (publication No. 02 of 12 months of 2004)

Disclosure of utility model

The present utility model has been made to solve the above-described problems, and an object of the present utility model is to provide a filter for a communication device and a method for manufacturing the same, which can reduce the amount of insertion loss due to coupling of two physical structures by minimizing a conventional bonding process for forming a cavity and for providing a structure such as a resonator in the cavity.

Another object of the present utility model is to provide a filter for a communication device and a method for manufacturing the same, in which the reliability of a product is improved by reinforcing the joint rigidity of a filter formed by folding a thin base material plate having relatively low rigidity.

The objects of the present utility model are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The filter for a communication device according to an embodiment of the present utility model includes a single base plate made of a conductive plate having a predetermined thickness or less and forming an inner surface of a cavity for performing frequency filtering, and the cavity is formed by folding at least a part of the base plate.

Wherein, the substrate plate may comprise: a main body bottom forming plate for forming a bottom surface of the cavity; a lower one-side thickness forming plate and a lower other-side thickness forming plate folded in the same direction at one widthwise end and the other widthwise end of the main body bottom forming plate to form a part of the cavity; a frequency tuning plate having one end in the width direction connected to the folded lower thickness forming plate in the other end in the width direction, the frequency tuning plate being folded in the width direction so as to be connected to the folded upper end of the lower thickness forming plate, the frequency tuning plate including a plurality of tuning rods each having a different single layer formed in the cavity so as to be spaced apart from the single layer formed by the plurality of resonators by a predetermined distance in the thickness direction; and a main body upper forming plate, wherein one end in the width direction is folded with the upper side thickness forming plate as a medium and the other end in the width direction is folded with the upper side thickness forming plate as a medium, and the other end in the width direction is connected with one end in the width direction of the frequency tuning plate and the upper end of the lower side thickness forming plate, wherein the plurality of tuning rods are separated from each other by a predetermined distance along the thickness direction of the cavity.

The substrate plate may further include a resonator plate extending perpendicularly to the folded lower-side thickness forming plate and lower-side thickness forming plate, and the substrate plate may include a plurality of resonators each having a single layer formed in the cavity.

The resonator plate may be provided in combination with a plurality of resonator plate mounting openings, and the plurality of resonator plate mounting openings may be formed such that one of the lower thickness forming plate and the lower thickness forming plate penetrates the inside and outside of the cavity.

And, the resonator plate may include: a resonator connecting rod horizontally connecting the plurality of resonators along a length direction of the cavity; a plurality of insertion ends provided at outer ends of the resonator connecting rod and inserted into the resonator plate mounting openings; and resonance characteristic ends formed at front ends of the resonators in an extending manner.

The plurality of insertion ends may be coupled by one of a brazing method and a welding method after being inserted into the plurality of resonator plate mounting openings.

At least two of the main body bottom forming plate, the lower portion one-side thickness forming plate, the lower portion other-side thickness forming plate, the resonator plate, the frequency tuning plate, the upper portion one-side thickness forming plate, the upper portion other-side thickness forming plate, and the main body upper portion forming plate may be positioned on the same horizontal plane when fully extended.

And, the present utility model may further include: a one-side shielding plate integrally formed at one longitudinal end of the main body bottom forming plate and folded, and having three sides connected to one longitudinal end of the lower one-side thickness forming plate in a folded state, one longitudinal end of the lower other-side thickness forming plate in a folded state, and one longitudinal end of the frequency tuning plate in a folded state, respectively; and an other side shielding plate integrally formed at the other end of the main body bottom forming plate in the longitudinal direction and folded, and having three sides respectively connected to the other end of the lower side thickness forming plate in the folded state in the longitudinal direction, and the other end of the frequency tuning plate in the folded state in the longitudinal direction.

The frequency tuning plate may be integrally formed with one of the lower-side thickness forming plate and the lower-side thickness forming plate, to which the resonator plate is bonded.

In the frequency tuning plate, the plurality of tuning rods may extend from one inner end in the width direction to the other inner end in the width direction, and may be formed by extending so as to form a single layer along the thickness direction of the cavity.

The frequency tuning plate may be formed by extending the plurality of tuning rods along a length of the cavity where the tuning rods overlap the plurality of resonators provided in different single layers in the thickness direction of the cavity.

The frequency tuning plate may further include a plurality of coupling adjustment rods extending from one inner end in the width direction to the other inner end in the width direction, and a single layer may be formed between adjacent tuning rods among the plurality of tuning rods.

The plurality of coupling adjustment rods may extend from one inner end in the width direction of the frequency tuning plate and may be connected to the other inner end in the width direction.

The main body bottom forming plate, the plurality of resonators, and the main body upper forming plate may each have a pin hole penetrating therethrough in the vertical direction, and support pins penetrating the pin holes may be provided when the base material plate for forming the cavity is folded.

The substrate plate may be folded to form a filter body having the cavity therein, the filter body may be disposed between the power amplifier plate and an antenna plate having a plurality of radiation devices disposed on a front surface thereof, and the filter for a communication device may further include: an input connector part for inputting a predetermined electric signal transmitted from the power amplifier board to one side of the cavity; and an output connector part for receiving a predetermined electric signal transmitted from the other side of the cavity and outputting the electric signal to the antenna board, wherein the output connector part may include an auxiliary cover for transmitting a vertical pressure applied to the power amplifier board so as not to be transmitted to the filter body when lamination bonding is performed on the front surface of the filter body of the antenna board.

The auxiliary cover may penetrate the rear surface portion and the front surface portion of the cavity in the thickness direction, the rear end portion may be connected to the front surface of the power amplifier board, and the front end portion may be connected to the rear surface of the antenna board.

The auxiliary cover may be made of a rigid material having a strength higher than that of the filter main body.

The output connector section may further include: a plurality of soldering pins extending rearward from a rear end portion of the auxiliary cover and inserted into the power amplifier board; a grounding gasket part arranged at the front end part of the auxiliary housing to support the rear surface of the antenna board; and a coaxial connector provided in the hollow space of the auxiliary housing, for electrically connecting an output end of a resonator plate including a plurality of resonators provided in the cavity to the antenna plate.

The output connector may be soldered after the plurality of solder pins are inserted into the front surface of the power amplifier board.

A plate spacer may be formed at a rear end portion of the auxiliary cover, the plate spacer being formed between the plurality of bonding pins and being configured to space a rear surface portion of the filter main body from the power amplifier plate by a predetermined distance.

And, when the plurality of soldering pins of the output connector part are inserted into the front surface of the power amplifier board, the input connector part may be coupled to the front surface of the power amplifier board by a Surface Mount Technology (SMT) method.

A filter for a communication device according to another embodiment of the present utility model may include a single substrate plate for forming a cavity as a dielectric-filled space, and the substrate plate may include: a main body bottom forming plate for forming a bottom surface of the cavity; a resonator plate including a plurality of resonators having a single layer formed in a thickness direction in the cavity corresponding to an upper portion of the main body bottom forming plate; a frequency tuning plate including a plurality of tuning rods formed in different single layers in the cavity so as to be spaced apart from the single layers formed by the plurality of resonators by a predetermined distance in a thickness direction; and a main body upper portion forming plate provided so as to cover an upper portion of the frequency tuning plate, wherein an upper portion of the cavity is formed, and the cavity is formed by connecting and folding a lower portion side thickness forming plate, a lower portion other side thickness forming plate, an upper portion one side thickness forming plate, and an upper portion other side thickness forming plate, which are connected to each other in a thickness direction, as a medium, such that at least two of the main body bottom forming plate, the resonator plate, the frequency tuning plate, and the main body upper portion forming plate are positioned on the same horizontal plane when fully extended.

The method for manufacturing a filter for a communication device according to an embodiment of the present utility model includes: a first folding step of folding a lower one-side thickness forming plate and a lower other-side thickness forming plate integrally connected to one end and the other end of the main body bottom forming plate in the width direction in the same direction so as to form a part including a bottom surface portion of the cavity; a second folding step of folding, after the first folding step, a frequency tuning plate including a plurality of tuning rods forming a predetermined single layer in the cavity in the thickness direction so as to form a single layer in the cavity in the thickness direction different from a plurality of resonators extending in the thickness direction in a direction orthogonal to the lower-side thickness forming plate and the lower-side thickness forming plate; and a third folding step of folding one end of the main body upper forming plate in the width direction with the upper one side thickness forming plate as a medium and folding the other end of the main body upper forming plate in the width direction with the upper other side thickness forming plate as a medium so as to be separated from the plurality of tuning rods by a predetermined distance in the thickness direction of the cavity, and folding the other end in the width direction so as to be connected to the one end of the frequency tuning plate in the width direction and the upper end of the lower other side thickness forming plate.

According to the filter for a communication device and the method of manufacturing the same of an embodiment of the present utility model, the following effects can be achieved.

First, as a method of constructing a structure in a cavity, conventional bonding welding or brazing methods are minimized, and the present utility model can be realized by a simple folding process, and insertion loss due to the use of the bonding method can be reduced, thereby improving communication reliability.

Second, since the present utility model can form the cavity by using a thin substrate of 3t or less, the overall thickness dimension of the product of the antenna device can be reduced, and thus the weight and the thickness of the product can be reduced.

Drawings

Fig. 1 is a perspective view showing a filter for a communication device according to an embodiment of the present utility model.

Fig. 2 is an exploded perspective view of the input port section and the output port section separated from each other and combined with the filter for the communication device in fig. 1.

Fig. 3a and 3b are a top exploded perspective view and a bottom exploded perspective view of the filter for the communication device of fig. 1.

Fig. 4 is an expanded view showing a substrate plate in the structure of the filter for the communication device in fig. 1.

Fig. 5 is an internal perspective view of fig. 1.

Fig. 6 is a cut-away perspective view taken along line A-A in fig. 2.

Fig. 7 (a) is a front view of fig. 1, fig. 7 (B) is a cross-sectional view taken along line B-B, and fig. 7 (c) is a cut-away perspective view.

Part (a) of fig. 8 is a side view of fig. 1, and part (b) of fig. 8 is a cut-away perspective view taken along line C-C.

Fig. 9 is a perspective view showing a modification of the frequency tuning plate in the configuration of fig. 1.

Fig. 10 is a side sectional view for explaining the function of the coupling adjustment lever in the modification of the structure of fig. 9.

Fig. 11a and 11b are a top perspective view and a bottom perspective view of a filter main body including an output connector portion for reinforcing rigidity of a base material plate in a folded state in the structure of fig. 1.

Fig. 12a and 12b are exploded perspective views of fig. 11a and 11 b.

Fig. 13 and 14 are cut-away perspective views showing the internal space of the cavity.

Fig. 15 is a partially cut-away perspective view showing an application pattern of the support pins at the time of the folding process of the base material plate in the structure of fig. 1.

Fig. 16 is a cross-sectional view showing a bonding pattern of the filter body to the power amplifier board.

Description of the reference numerals

100: The filter 105 for communication device: substrate board

110: Body bottom forming plate 120: lower other side thickness forming plate

130: Lower-side thickness forming plate 140: frequency tuning plate

146: Tuning lever 147: coupling adjusting rod

150: The upper body forming plate 151: tuning hole

152: Notch adjustment hole 161: upper other side thickness forming plate

162: Upper side thickness forming plate 180A: one side shielding plate

180B: the other side shielding plate 200: resonator plate

210: Resonator connecting rod 220: resonator with a plurality of resonators

230: Resonator characteristic ends 300A, 1300A: input connector part

300B, 1300B: output connector section 400: supporting pin

1310B: auxiliary housing 1320B: welding pin

1330B: coaxial connector 1340B: connection port

1350B: ground washer portion 1360B: plate partition

Detailed Description

A filter for a communication device and a method of manufacturing the same according to an embodiment of the present utility model are described in detail below with reference to the drawings.

In the process of giving reference numerals to a plurality of constituent elements in each drawing, the same reference numerals are given to the same constituent elements as much as possible even if they appear in different drawings. In the process of describing the embodiments of the present utility model, if it is determined that a specific description of the related known structure or function may obstruct the understanding of the embodiments of the present utility model, a detailed description thereof will be omitted.

In describing the structural elements in the embodiments of the present utility model, terms such as "first", "second", "a", "B", and the like may be used. These terms are only used to distinguish between corresponding structural elements and other structural elements, and the nature or order of the corresponding structural elements or the like is not limited to the terms thereof. And, unless otherwise defined, all terms used in the present specification including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. Terms having the same meaning as in a dictionary are generally used to be interpreted as having the same meaning as the related art in terms of text, and are not interpreted as idealized or excessively formalized meanings unless explicitly defined in the present utility model.

Fig. 1 is a perspective view showing a filter for a communication device according to an embodiment of the present utility model, fig. 2 is an exploded perspective view of separating an input port section and an output port section combined with the filter for a communication device in fig. 1, fig. 3a and 3B are a top exploded perspective view and a bottom exploded perspective view of the filter for a communication device in fig. 1, fig. 4 is an exploded view showing a base plate in a structure of the filter for a communication device in fig. 1, fig. 5 is an internal perspective view of fig. 1, fig. 6 is a cut-away perspective view taken along A-A line in fig. 2, fig. 7 (a) is a front view of fig. 1, fig. 7 (B) is a cut-away perspective view taken along B-B line, fig. 7 (C) is a cut-away perspective view, fig. 8 (a) is a side view of fig. 1, and fig. 8 (B) is a cut-away perspective view taken along C-C line.

In general, in the field of antenna technology, a filter functions to filter only a signal of a specific frequency band from a signal to be input or output in a transmitting/receiving process to acquire only a signal required by a consumer (user) as a result value.

In order to achieve such signal filtering, it is known by the name that a Cavity (Cavity) is formed between an input port for an input signal and an output port for an output signal, and a frequency signal value of a specific frequency band of a section required by a consumer is obtained by a frequency tuning process performed through the Cavity.

However, in the same industry as manufacturing antenna devices, only such a method has been disclosed in which, in order to manufacture a cavity filter, the cavity is manufactured by processing the inside of a filter main body made of a ceramic material or a rigid material having higher strength, and then a necessary structure for frequency filtering such as a plurality of resonators is separately manufactured and then fixed in the cavity.

However, the filter 100 for communication equipment according to the embodiment of the present utility model is not manufactured as described above, and after a single flat base plate having a thickness not exceeding a predetermined thickness is processed into a sheet metal form by a press process, a structure (provided that the resonator plate 200 including a plurality of resonators 220) in a cavity capable of minimizing the insertion loss at the time of bonding can be provided by a folding process, which is an innovative technical feature of the present utility model.

As shown in fig. 1 to 4, a filter 100 for communication equipment according to an embodiment of the present utility model is manufactured in an unfolded state, and includes a base plate 105 which forms a cavity C inside when folded.

The substrate plate 105 may be made of a conductive plate material having a predetermined thickness or less on the inner surface of the cavity C, which is a dielectric-filled space for performing frequency filtering. In this case, the predetermined thickness is a thickness that allows the cavity to be formed by the folding step and that can firmly maintain the formed cavity, and is preferably 3t or less that can prevent weight increase.

On the other hand, the cavity C may be formed by an operation of folding at least a part of the base material plate 105 (folding step).

For this purpose, as shown in fig. 1 to 4, in a filter 100 for a communication device according to an embodiment of the present utility model, a base plate 105 includes: a main body bottom forming plate 110, a lower one-side thickness forming plate 130, a lower other-side thickness forming plate 120, a frequency tuning plate 140, and a main body upper forming plate 150.

Hereinafter, for convenience of explanation, terms such as "space" and "position" will be described on the premise that the cavity C formed after folding the base material plate 105 is formed, and the sheet metal form can be formed by a pressing process, in which all the above structures are in an expanded view form on the same plane before folding the base material plate 105. The same applies to a filter 100' for a communication device according to another embodiment of the present utility model described later.

In more detail, the main body bottom forming plate 110 is configured to form a bottom portion of the folded cavity C, and one side connector installation hole 115A and the other side connector installation hole 115B for connecting and installing the input connector portion 300A and the output connector portion 300B described later are formed so as to communicate with the cavity C.

The lower-side thickness forming plate 130 and the lower-side thickness forming plate 120 are folded so as to be orthogonal to each other at the widthwise end of the main body bottom forming plate 110, which is formed in a rectangular shape extending in the longitudinal direction, to form one widthwise side wall of the cavity C and form one widthwise side thickness and the other widthwise side wall and form the other widthwise side thickness.

The lower thickness forming plate 130 and the lower thickness forming plate 120 are smaller than the width of the main body bottom forming plate 110, and preferably have an ultrathin shape with a smaller thickness in the width direction than the thickness in order to further reduce the space occupied by the thicknesses in the front-rear direction when stacked in an antenna housing portion not shown.

On the other hand, the frequency tuning plate 140 is folded so that the other end in the width direction is connected to the upper end of the folded lower thickness forming plate 130, and includes a plurality of tuning rods 146 that form different single layers in the cavity C at a predetermined distance from the single layer formed by a plurality of resonators 220 described later in the thickness direction.

That is, as shown in fig. 4, the frequency tuning plate 140 is formed to extend integrally with the lower other-side thickness forming plate 120 in an unfolded state, and can be folded so as to be bent orthogonally toward the inner side in which the cavity C is formed when folded.

Here, when a rectangular frame shape with an internal space is formed by penetrating up and down the frequency tuning plate 140 except for the edge end formed along the edge, the plurality of tuning rods 146 formed in the frequency tuning plate 140 are formed to extend from the inner side of one of the width direction one end and the other end of the cavity C (in the embodiment of the present utility model, the width direction one end adjacent to the lower thickness forming plate 130 is shown) so as to protrude and extend in a predetermined length so as to be maintained horizontal to the other width direction end, and may be separated by a predetermined length along the length direction of the cavity C.

The frequency tuning plate 140 as described above may be formed by extending the length of the plurality of tuning rods 146 overlapping the plurality of resonators 220 provided in different single layers in the thickness direction of the cavity C.

On the other hand, as shown in fig. 4, the frequency tuning board 140 may further include: an L-shaped notch portion 141 in which a notch based on inductive coupling (hereinafter referred to as "L-shaped notch") is formed at the right side end (high frequency region) of the passband; and a C-shaped notch portion 142 in which a notch based on capacitive coupling (hereinafter referred to as "C-shaped notch") is formed at the left side end (low frequency region) of the passband.

The L-shaped notch portion 141 and the C-shaped notch portion 142 may be formed in the same single layer with respect to the thickness direction of the cavity C, and may be formed in the same single layer as the plurality of tuning rods 146 already formed in the frequency tuning plate 140. However, the L-shaped notch portion 141 and the C-shaped notch portion 142 may form a single layer different from the plurality of resonators 220 of the resonator plate 200 described later in the cavity C.

As shown in fig. 4, a plurality of coupling adjustment rods 147 may be formed in the frequency tuning plate 140, and may be formed inside the end portion on one side in the width direction, and between a plurality of tuning rods 146 formed so as to be spaced apart from each other by a predetermined distance in the longitudinal direction.

The plurality of coupling adjustment bars 147 are positioned between the plurality of resonators 220 formed in the resonator plate 200 described later in a varying shape, so that an effect on a coupling value between the adjacent plurality of resonators 220 can be performed.

On the other hand, ribs 149A and 149B may be formed on both ends in the longitudinal direction of the frequency tuning plate 140 so as to protrude in the outer direction, and the ribs may be supported in the thickness direction of the cavity C by being interfered by one-side shielding plates 180A and the other-side shielding plates 180B, which will be described later.

The main body upper forming plate 150 is folded so as to shield the upper surface of the cavity C from the outside, and functions to form the upper inner surface of the cavity C.

The main body upper forming plate 150 may be disposed in parallel on the upper portion so as to be spaced apart from the frequency tuning plate 140, which is disposed in a folded state and forms a single layer at least in the cavity C, by a predetermined distance.

For this purpose, an upper one-side thickness forming plate 161 that connects between the width-direction one-side end of the main body upper forming plate 150 and the frequency tuning plate 140 is formed in an integrated manner, and an upper other-side thickness forming plate 162 is formed at the width-direction other-side end of the main body upper forming plate 150 in an integrated manner.

The upper one-side thickness forming plate 161 is folded upward so as to be orthogonal to the inner direction with respect to the width-direction one-side end of the frequency tuning plate 140, the upper other-side thickness forming plate 162 is folded downward so as to be orthogonal to the inner direction with respect to the width-direction other-side end of the main body upper forming plate 150, and the lower end thereof can be connected to the upper end of the lower other-side thickness forming plate 120.

On the other hand, in the filter 100 for a communication device according to an embodiment of the present utility model, the base plate 105 may further include a resonator plate 200 provided with a plurality of resonators 220.

The resonator plate 200 is provided separately, and a single layer is formed so as to be spaced apart from a single layer formed by the plurality of tuning rods 146 of the frequency tuning plate 140 in the thickness direction by using the plurality of resonator plate mounting openings 129h formed in one of the lower side thickness forming plate 130 and the lower side thickness forming plate 120 of the base plate 105 as a medium, and is joined.

In more detail, as shown in fig. 1 to 4, the resonator plate 200 may include a plurality of resonators 220, which are folded and extended orthogonally toward the inner side direction with respect to the folded lower one-side thickness forming plate 130 and the lower other-side thickness forming plate 120, forming a single layer in the cavity C.

The resonator plate 200 may be integrally provided with a plurality of resonator plate installation openings 129h, and the plurality of resonator plate installation openings 129h may penetrate one of the lower-side thickness forming plate 130 and the lower-side thickness forming plate 120 so as to penetrate the inside and outside of the cavity C.

As shown in fig. 3a, the resonator plate 200 may include: a resonator connecting rod 210 horizontally connecting a plurality of resonators 220 along the length direction of the cavity C; a plurality of insertion ends 215 provided at the outer end portions of the resonator connecting rod 210 and inserted into the resonator plate mounting openings 129h; and resonance characteristic ends 230 extending from front ends of the plurality of resonators 220.

On the other hand, the plurality of insertion ends 215 provided at the outer end portions of the resonator connecting rod 210 may be coupled by one of a brazing method and a welding method after being inserted into the plurality of resonator plate setting ports 129h from the inner side where the cavity C is provided.

As shown in fig. 1 to 4, the substrate plate 105 may further include: a one-side shielding plate 180A integrally formed at one longitudinal end of the main body bottom forming plate 110 and folded, and having three sides connected to one longitudinal end of the lower one-side thickness forming plate 130 in a folded state, one longitudinal end of the lower other-side thickness forming plate 120 in a folded state, and one longitudinal end of the frequency tuning plate 200 in a folded state, respectively; and another shielding plate 180B integrally formed at the other longitudinal end of the main body bottom forming plate 110 and folded, and having three sides connected to the other longitudinal end of the lower one-side thickness forming plate 130 in a folded state, the other longitudinal end of the lower other-side thickness forming plate 120 in a folded state, and the other longitudinal end of the frequency tuning plate 140 in a folded state, respectively.

On the other hand, as shown in fig. 1 to 4, one-side rib through-holes 189A and the other-side rib through-holes 189B for inserting one-side installation ribs 149A and the other-side installation ribs 149B formed at both longitudinal end portions of the frequency tuning plate 140 may be formed in the one-side shielding plate 180A and the other-side shielding plate 180B.

In the filter 100 for a communication device according to the embodiment of the present utility model, the vertical cross-sectional shape of the base plate 105 in the folded state includes a rectangular shape of the main body bottom forming plate 110, and from this point, the one-side shielding plate 180A and the other-side shielding plate 180B are defined to have three sides, but the present utility model is not limited thereto, and may be understood to be a side corresponding to the shape of the vertical cross-section formed by the cavity C. Assuming that the vertical cross-sectional shape of the cavity C is triangular, the one-side shielding plate 180A and the other-side shielding plate 180B have two sides in a triangular shape excluding sides (surfaces) occupied by the main body bottom forming plate 110.

Fig. 9 is a perspective view showing a modification of the frequency tuning plate in the structure of fig. 1, and fig. 10 is a side sectional view for explaining the function of the coupling adjustment lever of the modification in the structure of fig. 9.

As described above, the plurality of coupling adjustment rods 147 may be formed to extend from the inner end on one side in the width direction to the inner end on the other side in the width direction in the frequency tuning plate 140, and the same single layer as the plurality of tuning rods 146 may be formed between adjacent tuning rods among the plurality of tuning rods 146.

The plurality of coupling adjustment rods 147 shown in fig. 5 to 8 extend from the inner end of the one end in the width direction of the frequency tuning plate 140 to a degree not exceeding at least the tip ends of the plurality of tuning rods 146, but as shown in fig. 9 and 10, the plurality of coupling adjustment rods 147 formed in the frequency tuning plate 140 of the modification extend from the inner end of the one end in the width direction of the frequency tuning plate 140 to be connected to the inner end of the other end in the width direction.

As shown in fig. 10, the coupling adjusting lever 147 of the frequency tuning plate 140 according to the modification described above can be changed in shape from the upper part to the lower part in the thickness direction of the cavity C by a designer tuning the fine frequency in the cavity C to interfere between the adjacent plural resonators 220 in the path of the signal flow, and thus can function to adjust the coupling value.

On the other hand, as shown in fig. 1 to 8, the filter 100 for a communication device according to an embodiment of the present invention may further include a plurality of tuning holes 151 and notch adjusting holes 152 formed to communicate with the cavity C provided in the body upper forming plate 150.

The tuning holes 151 are formed at corresponding positions on the tuning rods 146 provided in the cavity C, and the tuning rods 146 are inserted into a predetermined tuning tool (not shown) to change the shape of the tuning rods 146, thereby adjusting the separation distance from the resonators provided in different single layers, and realizing fine frequency tuning.

The plurality of notch adjustment holes 152 are inserted into a predetermined coupling adjustment tool (not shown) at positions corresponding to the L-shaped notch portion 141 and the C-shaped notch portion 142 provided so as to form a single layer in the cavity C, and one of the L-shaped notch portion 141 and the C-shaped notch portion 142 is changed in shape so that the notch of the desired passband reaches a design value.

Fig. 11a and 11b are a top perspective view and a bottom perspective view of a filter main body including an output connector portion for reinforcing rigidity of a base plate in a folded state in the structure of fig. 1, fig. 12a and 12b are exploded perspective views of fig. 11a and 11b, fig. 13 and 14 are cut-away perspective views showing an internal space of a cavity, fig. 15 is a partially cut-away perspective view showing an application state of a support pin at a folding process of the base plate in the structure of fig. 1, and fig. 16 is a cross-sectional view showing a coupling state of the filter main body to a power amplifier plate.

Referring to fig. 11a and 11b to 16, in the filter 100 for a communication device according to an embodiment of the present utility model, a filter body having the cavity C therein is formed by a folding process of a base plate 105, and the filter body is disposed between a power amplifier board PCB and an antenna board (not shown) having a plurality of radiation devices disposed on a front surface thereof, and may further include: input connector parts 300A, 1300A for inputting a predetermined electric signal transmitted from the power amplifier board PCB to one side of the cavity C; and output connector portions 300B and 1300B for receiving predetermined electric signals transmitted from the other side of the cavity C and outputting the received electric signals to the antenna board.

As shown in fig. 12b, the input connector portions 300A, 1300A may include: teflon portion 1310A mounted in input connector mounting hole 115A; and a connection pin 1330A connected to one of the resonators 200 inside the cavity C by penetrating the teflon portion 1310A.

On the other hand, the output connector portions 300B and 1300B may be formed in the same configuration as the input connector portions 300A and 1300A, but as will be described later, the output connector portions may be provided in a deformed configuration that minimizes transmission of external force between the antenna plate and the filter main body.

In more detail, as shown in fig. 11a, 11B to 16, the output connector part 1300B may include an auxiliary housing 1310B so that the applied vertical pressure is transmitted to the power amplifier board PCB so as not to be transmitted to the filter body when the filter body of the antenna board is laminated to the front surface.

The auxiliary housing 1310B penetrates both the rear and front portions of the cavity C (defined as the case where the antenna board is located in front and the power amplifier board PCB is located in rear) in the thickness direction, and the rear end portion is connected to the front surface of the power amplifier board PCB and the front end portion is connected to the rear surface of the antenna board. The auxiliary housing 1310B may be formed in a hollow cylindrical shape, but is not limited thereto.

Further, the auxiliary cover 1310B is preferably formed of a rigid material having a strength higher than that of the filter main body.

Therefore, in the process of laminating and bonding the antenna board to the front surface of the filter main body, the external force transmitted from the assembler, the automatic assembly jig, or the like is not transmitted to the filter main body which is relatively thin (3 t or less) and is ultrathin and has poor rigidity, but the external force is directly transmitted to the power amplifier board PCB, thereby providing an advantage that shape deformation or the like can be prevented at the time of assembly.

Wherein the output connector part 1300B may include: a plurality of soldering pins 1320B extending from the rear end of the auxiliary housing 1310B toward the rear for insertion into the power amplifier board PCB; a ground washer 1350B provided at a front end of the auxiliary housing 1310B to support a rear surface of the antenna board; and a coaxial connector 1330B disposed in the hollow space of the auxiliary housing 1310B for electrically connecting the output 240 of the resonator plate 220 including the plurality of resonators 220 disposed in the cavity C with the antenna plate.

The coaxial connector 1330B includes a terminal pin (no reference numeral) for electrically connecting to the antenna board, and a connection port 1340B for inserting the output terminal 240 of the resonator board 220 is formed in the auxiliary housing 1310B so as to communicate with the auxiliary housing.

On the other hand, as shown in fig. 16, the output connector 1300B is soldered after a plurality of solder pins 1320B are inserted into the front surface of the power amplifier board PCB.

As shown in fig. 16, a board separation portion 1360B may be formed at the rear end of the auxiliary cover 1310B, and the board separation portion 1360B may be formed between the plurality of bonding pins 1320B to separate the rear surface of the filter main body from the power amplifier board PCB by a predetermined distance.

Accordingly, the filter main body and the power amplifier board PCB will be partitioned by the board partition 1360B (refer to reference numeral "L" in fig. 16), an advantage can be provided that both sides of the power amplifier board PCB provided with a general printed circuit board can be applied in an unrestricted manner.

On the other hand, preferably, when the plurality of soldering pins 1320B of the output connector part 1300B are inserted into the front surface of the power amplifier board PCB, the input connector part 1300A is combined with the front surface of the power amplifier board PCB by means of a surface assembly technique.

On the other hand, as shown in fig. 15, pin holes 116h, 236h, 156h penetrating in the vertical direction may be formed in the main body bottom forming plate 110, the plurality of resonators 220, and the main body upper forming plate 150, respectively, and support pins 400 penetrating the respective pin holes 116h, 236h, 156h may be provided when the base plate 1105 for forming the cavity C is folded. That is, the support pins 400 are inserted into the respective pin holes 116h, 236h, 156h so that the respective portions are folded to accurate positions when the folding process is performed, and then removed when the folding process is completed, so that the frequency filtering and tuning in the cavity C are not affected.

A method for manufacturing a filter for a communication device according to an embodiment of the present utility model is described below.

That is, as shown in fig. 1 to 16, a method for manufacturing a filter for a communication device according to an embodiment of the present utility model includes: a first folding step of folding the lower one-side thickness forming plate 130 and the lower other-side thickness forming plate 120 integrally connected to one end and the other end of the main body bottom forming plate 110 in the width direction in the same direction so as to form a part including the bottom surface portion of the cavity C; a second folding step of folding the frequency tuning plate 140 including the plurality of tuning rods 146 forming a predetermined single layer in the cavity C in the thickness direction so as to form a different single layer in the cavity C in the thickness direction from the plurality of resonators 220 extending orthogonally to the lower-side thickness forming plate 130 and the lower-side thickness forming plate 120 after the first folding step; and a third folding step of folding the other widthwise end of the frequency tuning plate 140 so as to connect the one widthwise end of the frequency tuning plate 140 and the upper end of the lower other side thickness forming plate 120, with the upper one side thickness forming plate 162 being one widthwise end of the medium folding body upper forming plate 150 and the upper other side thickness forming plate 161 being the other widthwise end of the medium folding body upper forming plate 150, with a predetermined distance from the plurality of tuning rods 146 in the thickness direction of the cavity C.

It was confirmed that the detailed folding process of the remaining structure can be additionally performed with reference to fig. 4.

The filter for communication equipment and the method of manufacturing the same according to an embodiment of the present utility model are described in detail above with reference to the drawings. However, the embodiment of the present utility model is not limited to the above-described embodiment, and it is obvious to those skilled in the art that various modifications can be made without departing from the scope of the utility model. The true scope of the utility model should therefore be determined by the appended claims.

Claims (21)

1. A filter for a communication device, characterized in that,

Comprises a single base plate made of a conductive plate material having a predetermined thickness or less and forming an inner surface of a cavity for performing frequency filtering,

The cavity is formed by folding at least a portion of the base material plate.

2. The filter for a communication device according to claim 1, wherein the base plate comprises:

A main body bottom forming plate for forming a bottom surface of the cavity;

A lower one-side thickness forming plate and a lower other-side thickness forming plate folded in the same direction at one widthwise end and the other widthwise end of the main body bottom forming plate to form a part of the cavity;

A frequency tuning plate having one end in the width direction connected to the folded lower thickness forming plate in the other end in the width direction, the frequency tuning plate being folded in the width direction so as to be connected to the folded upper end of the lower thickness forming plate, the frequency tuning plate including a plurality of tuning rods each having a different single layer formed in the cavity so as to be spaced apart from the single layer formed by the plurality of resonators by a predetermined distance in the thickness direction; and

And a main body upper forming plate in which one end in the width direction is folded with the upper one side thickness forming plate as a medium and the other end in the width direction is folded with the upper other side thickness forming plate as a medium so as to be spaced apart from the plurality of tuning rods by a predetermined distance in the thickness direction of the cavity, and the other end in the width direction is connected to the one end in the width direction of the frequency tuning plate and the upper end of the lower other side thickness forming plate.

3. The filter for a communication device according to claim 2, wherein the base plate further includes a resonator plate extending perpendicularly to the folded lower one-side thickness forming plate and lower other-side thickness forming plate, and the plurality of resonators including a single layer formed in the cavity.

4. The filter for a communication device according to claim 3, wherein the resonator plate is provided in combination with a plurality of resonator plate mounting openings, and the plurality of resonator plate mounting openings are formed such that one of the lower-side thickness forming plate and the lower-side thickness forming plate penetrates the inside and outside of the cavity.

5. The filter for a communication device according to claim 4, wherein said resonator plate comprises:

a resonator connecting rod horizontally connecting the plurality of resonators along a length direction of the cavity;

A plurality of insertion ends provided at outer ends of the resonator connecting rod and inserted into the resonator plate mounting openings; and

Resonance characteristic ends formed at front ends of the resonators.

6. The filter for a communication device according to claim 5, wherein the plurality of insertion ends are coupled by one of a brazing method and a welding method after being inserted into the plurality of resonator plate mounting ports.

7. The filter for a communication device according to claim 2, wherein at least two of the main body bottom forming plate, the lower portion one-side thickness forming plate, the lower portion other-side thickness forming plate, the resonator plate, the frequency tuning plate, the upper portion one-side thickness forming plate, the upper portion other-side thickness forming plate, and the main body upper portion forming plate are positioned on the same horizontal plane when fully extended.

8. The filter for a communication device according to claim 2, further comprising:

A one-side shielding plate integrally formed at one longitudinal end of the main body bottom forming plate and folded, and having three sides connected to one longitudinal end of the lower one-side thickness forming plate in a folded state, one longitudinal end of the lower other-side thickness forming plate in a folded state, and one longitudinal end of the frequency tuning plate in a folded state, respectively; and

The other side shielding plate is formed at the other end of the main body bottom forming plate in the length direction in an integrated manner and is folded, and is provided with three sides which are respectively connected with the other end of the lower side thickness forming plate in the length direction in a folded state, the other end of the lower side thickness forming plate in the length direction in a folded state and the other end of the frequency tuning plate in the length direction in a folded state.

9. The filter for a communication device according to claim 2, wherein the frequency tuning plate is integrally formed with one of the lower-side thickness forming plate and the lower-side thickness forming plate, to which the resonator plate is bonded.

10. A filter for a communication device according to claim 9,

The frequency tuning plate is formed in a hollow frame shape having a rectangular shape and penetrating from top to bottom,

In the frequency tuning plate, the tuning rods extend from one inner end in the width direction to the other inner end in the width direction, and are formed by extending so as to form a single layer along the thickness direction of the cavity.

11. The filter for a communication device according to claim 10, wherein the frequency tuning plate is formed by extending a length of the plurality of tuning rods overlapping the plurality of resonators provided in different single layers in a thickness direction of the cavity.

12. The filter for a communication device according to claim 10, wherein the frequency tuning plate further includes a plurality of coupling adjustment rods extending from one inner end in the width direction to the other inner end in the width direction, and wherein adjacent tuning rods among the plurality of tuning rods form a single layer with the plurality of tuning rods.

13. The filter for a communication device according to claim 12, wherein the plurality of coupling adjustment rods extend from one widthwise inner end of the frequency tuning plate to be connected to the other widthwise inner end.

14. The filter for a communication device according to claim 11, wherein,

The main body bottom forming plate, the plurality of resonators, and the main body upper forming plate are respectively formed with pin holes penetrating in the vertical direction,

When the base plate for forming the cavity is folded, support pins penetrating the pin holes may be provided.

15. A filter for a communication device according to claim 2, wherein,

The substrate plate is formed into a filter body having the cavity therein by a folding process, the filter body is disposed between a power amplifier plate and an antenna plate having a plurality of radiating devices disposed on a front surface thereof,

The filter for a communication device further includes:

An input connector part for inputting a predetermined electric signal transmitted from the power amplifier board to one side of the cavity; and

An output connector part for receiving a predetermined electric signal transmitted from the other side of the cavity and outputting the electric signal to the antenna board,

The output connector section includes an auxiliary cover, and when the filter main body of the antenna board is laminated on the front surface, the vertical pressure applied is transmitted to the power amplifier board so as not to be transmitted to the filter main body.

16. The filter for a communication device according to claim 15, wherein the auxiliary cover penetrates both the rear surface portion and the front surface portion of the cavity in the thickness direction, and the rear end portion is connected to the front surface of the power amplifier board, and the front end portion is connected to the rear surface of the antenna board.

17. The filter for a communication device according to claim 15, wherein said auxiliary cover is formed of a rigid material having a strength higher than that of said filter main body.

18. The filter for a communication device according to claim 17, wherein said output connector section further comprises:

a plurality of soldering pins extending rearward from a rear end portion of the auxiliary cover and inserted into the power amplifier board;

A grounding gasket part arranged at the front end part of the auxiliary housing to support the rear surface of the antenna board; and

And a coaxial connector provided in the hollow space of the auxiliary housing, for electrically connecting an output end of a resonator plate including a plurality of resonators provided in the cavity to the antenna plate.

19. The filter for a communication device according to claim 18, wherein the output connector portion is soldered after the plurality of solder pins are inserted into the front surface of the power amplifier board.

20. The filter for a communication device according to claim 18, wherein a plate spacer is formed at a rear end portion of the auxiliary cover, and the plate spacer is formed between the plurality of bonding pins so as to space a rear surface portion of the filter main body from the power amplifier plate by a predetermined distance.

21. The filter for a communication device according to claim 18, wherein said input connector portion is coupled to a front surface of said power amplifier board by means of a surface mount technique when said plurality of solder pins of said output connector portion are inserted into the front surface of said power amplifier board.