Filter for communication device

Abstract

The invention discloses a filter for communication equipment. According to one embodiment of the present disclosure, provided is a filter for a communication device, comprising: a filter housing including a cavity for performing frequency filtering processing; and at least one connector which is integrally disposed with the filter housing, and which inputs an electric signal to the cavity or outputs the electric signal input into the cavity to the outside of the cavity, the filter housing being formed by folding at least a portion of a main board composed of a conductive plate material.

Description

Technical Field

[0001] This disclosure relates to filters for communication equipment. Background Technology

[0002] The contents described in this section are merely for providing background information for this disclosure and do not constitute prior art.

[0003] Filters for communication equipment (such as radio frequency filters) can be used to selectively filter specific frequency bands. Filters for communication equipment can be constructed from multiple resonators connected together.

[0004] A resonator is a circuit device used to resonate at a specific frequency. As an equivalent electronic circuit, a resonator can be constructed using a combination of inductors and capacitors. Resonators can be housed within cavities such as cylinders or cubes. They can be configured as either dielectric resonance elements (DR) or metal resonance devices. Resonators induce resonance by creating an electromagnetic field within the cavity that has only the natural frequency of the target frequency band.

[0005] Existing filters for communication equipment are constructed using multiple cavities to form multiple resonant segments, and these segments are connected sequentially in a multi-stage structure. Due to this multi-stage structure with multiple resonant segments, these filters are bulky. To enhance the skirt characteristics between the multiple resonators, additional structures are needed within the cavities to form inductive or capacitive coupling, further increasing the overall weight.

[0006] Existing communication equipment uses bolted connections to attach the output connector to the filter housing. When using bolts to fix the connector to the filter housing, irregular contact can occur between them. This irregular contact may lead to damage to the filter housing and increased insertion loss.

[0007] On the other hand, in antenna devices recently applied to Massive MIMO (Massive Multiple-Input Multiple-Output) technology, efforts are being made to minimize the thickness of internal components such as filters in order to achieve a thinner overall product design. The main filters used include MBF (Microwave Corrugated Filter) and CWF (Ceramic Waveguide Filter).

[0008] However, existing filters have the following problems: since the PCB boards need to be mounted on the top and bottom of the filter respectively, the filter itself must have sufficient thickness and size to support its weight. Furthermore, the large size of the filter results in insufficient space between the top and bottom PCB boards for mounting other electronic components. Summary of the Invention

[0009] (a) Technical problems to be solved Therefore, in order to solve the above problems, the main objective of this disclosure is to provide a filter for communication devices that reduces both size and weight.

[0010] Furthermore, the main objective of this disclosure is to provide a filter for communication devices that reduces insertion loss when multiple physical structures are combined by minimizing existing bonding processes used to form cavities and resonators within the cavities.

[0011] Furthermore, the main objective of this invention is to provide a filter for communication devices. In order to fix the PCB to the upper and lower parts of the filter, when combining the filter formed by folding a thin motherboard with relatively weak rigidity, the rigidity of the filter is enhanced to prevent filter loss and improve product reliability.

[0012] The technical problem to be solved by the present invention is not limited to the technical problem described above. Other technical problems not mentioned can also be clearly understood by those skilled in the art based on the following description.

[0013] (II) Technical Solution To achieve the above objectives, according to an embodiment of the present disclosure, a filter for a communication device is provided, the filter housing including a cavity for performing frequency filtering; and at least one connector integrally disposed with the filter housing and for inputting an electrical signal into the cavity or outputting an electrical signal input in the cavity to the outside of the cavity, the filter housing being formed by folding at least a portion of a main board made of conductive plate material.

[0014] (III) Beneficial Effects As described above, according to this embodiment, a filter for communication devices with reduced size and weight can be provided.

[0015] Furthermore, by minimizing existing bonding processes used to form cavities and resonators within cavities, a filter for communication devices is provided that can reduce insertion loss when multiple physical structures are combined.

[0016] Furthermore, in order to fix the PCB to the top and bottom of the filter, when combining the filter formed by folding a thin motherboard with relatively weak rigidity, it is possible to provide a filter for communication equipment that can prevent filter loss and improve product reliability by enhancing the rigidity of the filter. Attached Figure Description

[0017] Figure 1 This is a perspective view of a filter for a communication device according to a first embodiment of the present disclosure.

[0018] Figure 2 This is an unfolded view of the filter housing according to the first embodiment of this disclosure.

[0019] Figure 3 This is a left cross-sectional view of a filter for a communication device according to a first embodiment of the present disclosure.

[0020] Figure 4 This is a front cross-sectional view of a filter for a communication device according to the first embodiment of this disclosure.

[0021] Figure 5 This is a rear cross-sectional view of a filter for a communication device according to a first embodiment of the present disclosure.

[0022] Figure 6 This is a diagram showing the arrangement of the resonator panel and the frequency tuning panel according to the first embodiment of this disclosure.

[0023] Figure 7 This is a top oblique view of the connector according to the first embodiment of the present disclosure.

[0024] Figure 8 This is a perspective view of a filter for a communication device according to a second embodiment of the present disclosure.

[0025] Figure 9 This is an unfolded view of the filter housing according to the second embodiment of the present disclosure.

[0026] Figure 10 This is a bottom oblique view of the connector according to the second embodiment of the present disclosure. Detailed Implementation

[0027] The following is a detailed description of some embodiments of the present disclosure with reference to the accompanying drawings. When assigning reference numerals to the components in the drawings, the same reference numerals are used as much as possible for the same components, even when labeled in another drawing. Furthermore, in the process of describing the present disclosure, detailed descriptions of related well-known structures or functions will be omitted if it is believed that such detailed descriptions would obscure the main points of the disclosure.

[0028] In describing the components of the embodiments of this disclosure, symbols such as first, second, A), B), (a), and (b) may be used. These symbols are merely used to distinguish the component from other components, and they do not limit the nature, sequence, or order of the corresponding components.

[0029] When a component is described as "connected", "combined", or "in contact" with another component, it should be understood as a component being directly connected or in contact with another component, including cases where the two components are "connected", "combined", or "in contact" with another component.

[0030] Throughout the instruction manual, if a component "includes" or "possesses" another component, unless otherwise stated otherwise, it can be understood that a component also includes the other component, rather than that a component excludes the other component.

[0031] To illustrate the shape of the filter for communication equipment according to this disclosure, terms such as length, width, and height may be used. Length refers to the horizontal length relative to the front view; width refers to the horizontal length relative to the right side view; and height refers to the vertical length relative to the front view.

[0032] Figure 1 This is a perspective view of a filter for a communication device according to a first embodiment of the present disclosure.

[0033] Figure 2 This is an unfolded view of the filter housing according to the first embodiment of this disclosure.

[0034] Figure 3 This is a left cross-sectional view of a filter for a communication device according to a first embodiment of the present disclosure.

[0035] Reference Figures 1 to 3 According to the first embodiment of the present disclosure, the filter for communications apparatus 100 may include all or part of a filter housing 110, at least one connector 120, a resonator panel 210, and a frequency tuning panel 220.

[0036] The filter housing 110 may include a cavity 112. The cavity 112 refers to the hollow space inside the filter housing 110. The cavity 112 can induce the propagation of electrical signals. The cavity 112 can be used for resonance-based frequency filtering. That is, the frequency of the electrical signal flowing into the cavity 112 can be filtered based on the resonance effect.

[0037] The filter housing 110 can be manufactured using a conductive plate. For example, the filter housing 110 can be made of materials such as aluminum, copper, stainless steel, titanium, or nickel. Because the filter housing 110 is made of a conductive plate, it effectively prevents electrical signals input to the inside of the filter housing 110 from leaking to the outside. Filter housings 110 made using such materials exhibit excellent durability and strong corrosion resistance.

[0038] The filter housing 110 can be arranged between multiple boards. These multiple boards can refer to a printed circuit board (PCB) 130 or an antenna board (not shown) with at least one radiating element on its front. Thus, the communication device filter 100 can transmit and receive filtered signals between the multiple boards via connector 120.

[0039] The filter housing 110 may include an opening part 111 on the other side of the cavity 112. The opening part 111 refers to the open portion of the filter housing 110 and the entire filter housing 110 located in that portion. The other side of the cavity refers to the right side relative to the front view. The opening part 111 may have a structure that forms a step with the filter 100 for a communication device according to the first embodiment of this disclosure. For example, when viewing the filter housing 110 in the right side view, the opening part 111 and the filter housing 110 have the same height, but the width of the opening part 111 is smaller than the width of the filter housing 110. The width of the opening part 111 may be the same as the width or diameter of the support part 121. When the filter housing 110 and the connector 120 are integrally joined, the opening part 111 may be covered. For details on the method and shape of the integral joining of the filter housing 110 and the connector 120, please refer to... Figure 7 The details will be provided later.

[0040] The filter housing 110 can be formed by folding at least a portion of the main body 110-1 to 110-4 of the conductive plate and integrally combining it with the cover plate 110-5.

[0041] The motherboards 110-1 to 110-4 may include a front panel 110-1, a bottom panel 110-4, a top panel 110-3, and an end panel 110-2.

[0042] The front panel 110-1 can form the front face of the filter housing.

[0043] The end face forming panel 110-2 can be folded from one side of the front forming panel 110-1 to form one end face of the filter housing 110.

[0044] The bottom forming panel 110-4 and the top forming panel 110-3 can be folded from the lower and upper sides of the front forming panel 110-1 in the same direction to form the bottom and top surfaces of the filter housing 110.

[0045] The filter housing 110 and connector 120 can be integrally joined by the following process.

[0046] The motherboards 110-1 to 110-4 are folded. A three-dimensional shape is formed by integrally joining the contacting edges of the motherboards 110-1 to 110-4. The motherboards 110-1 to 110-4 are integrally joined with the connector 120. The edges of the cover plate 110-5 are integrally joined with the edges of the motherboards 110-1 to 110-4. The connector 120 is integrally joined with the cover plate 110-5. In this disclosure, the filter 100 for communication equipment is cuboid in shape, but the shape of the filter 100 for communication equipment is not limited to this. For example, the filter 100 for communication equipment can be a triangular prism or a pentagonal prism. In this case, it should be noted that the shape of the motherboard and the folding method may differ from the previously described content.

[0047] like Figure 2 As shown, the top surface forming panel 110-3 and the bottom surface forming panel 110-4 can be configured in a shape that is integrally integrated with the connector 120.

[0048] As an example different from the first embodiment, the motherboards 110-1 to 110-4 may not include a panel 110-2 for forming an end face, the filter housing 110 may include multiple open portions, and the connector 120 may be integrally combined with the filter housing 110 to cover the multiple open portions.

[0049] Figure 4 This is a front cross-sectional view of a filter for a communication device according to the first embodiment of this disclosure.

[0050] Figure 5 This is a rear cross-sectional view of a filter for a communication device according to a first embodiment of the present disclosure.

[0051] Figure 6 This is a diagram showing the arrangement of the resonator panel and the frequency tuning panel according to the first embodiment of this disclosure.

[0052] Reference Figures 1 to 6 The resonator panel 210 and frequency tuning panel 220 of the filter 100 for communication devices according to the first embodiment of the present disclosure will be described in detail.

[0053] The resonator panel 210 can be arranged inside the cavity 112 to filter the frequency of the electrical signal. The resonator panel 210 is connected to the connector 120, receives the electrical signal from the connector, filters the frequency, and then sends the frequency-filtered electrical signal to the connector 120. In order to filter the frequency of the electrical signal based on the generation of resonance effect, the resonator panel 210 may include all or part of a plurality of resonators 211, resonator connect bars 212, and resonant characteristic sections 213.

[0054] Multiple resonators 211 can be configured to form a single layer inside the cavity 112. For example, with Figure 3 From a reference perspective, when observing the filter 100 for a communication device according to the first embodiment of this disclosure, the plurality of resonators 211 appear to overlap each other. The plurality of resonators 211 are arranged horizontally with respect to the length direction of the filter 100 for a communication device according to the first embodiment of this disclosure, thereby forming a single layer.

[0055] The resonator connecting rod 212 horizontally connects multiple resonators 211 along the length of the cavity 112. The resonator connecting rod 212 may include an input section 214 and an output section 215. The input section 214 connects to the printed circuit board 130 from one side of the cavity 112. The output section 215 connects to the connector 120 from the other side of the cavity 112. The resonator connecting rod 212 acts as an electrical wire to transmit the electrical signal received from the input section 214 to each resonator 211. After the electrical signal input to the input section 214 is transmitted to each resonator 211 via the resonator connecting rod 212 and filtered, it can be transmitted to the outside of the cavity 112 via the output section 215.

[0056] The resonant characteristic segment 213 can extend and form from the front ends of each of the multiple resonators 211. The resonant characteristic segment 213 can partially overlap with the tuning rod 221, which can play a role in adjusting the resonant frequency. That is, by taking advantage of the shape and arrangement of the resonant characteristic segment 213 and the tuning rod 221, multiple inductors and capacitors can be formed.

[0057] A frequency tuning panel 220 is disposed inside the cavity 112 and is adjustable to adjust the frequency characteristic of the filter 100 for a communication device according to the first embodiment of this disclosure. The frequency tuning panel 220 may be rectangular in shape and hollow inside. To adjust the frequency characteristic, the frequency tuning panel 220 may include a plurality of tuning bars 221 and at least one coupling control bar 222.

[0058] Multiple tuning rods 221 can be configured to form a single layer inside the cavity 112. For example, with Figure 3 When observing the filter 100 for a communication device according to the first embodiment of this disclosure from a reference perspective, the plurality of tuning rods 221 appear to overlap each other. The plurality of tuning rods 221 can be arranged horizontally with respect to the length direction of the filter 100 for a communication device according to the first embodiment of this disclosure and form a single layer. The plurality of tuning rods 221 are respectively formed inside the frequency tuning panel 220, extending from one end to the other.

[0059] The coupling adjustment rod 222 can be formed by extending from one end to the other from the inside of the frequency tuning panel 220. The coupling adjustment rod 222 can be arranged between adjacent tuning rods 221 in a plurality of tuning rods 221 and is configured to form the same single layer as the plurality of tuning rods 221.

[0060] The resonator panel 210 and the frequency tuning panel 220 can be arranged spaced apart within the cavity 112. The resonators 211 of the resonator panel 210 and the tuning rods 221 of the frequency tuning panel 220 can be arranged to partially overlap each other. For example, as... Figure 6 As shown, when viewed from the front or back of the filter 100 for a communication device according to the first embodiment of this disclosure, the resonators 211 of each resonator panel 210 and the tuning rods 221 of each frequency tuning panel 220 may partially overlap each other.

[0061] Figure 7 This is a top oblique view of the connector according to the first embodiment of the present disclosure.

[0062] Reference Figures 1 to 7The connector 120 according to the first embodiment of the present disclosure will be described in detail.

[0063] The connector can be configured to receive electrical signals from the printed circuit board 130 and input these signals to one side of the cavity 112, or output signals from the other side of the cavity 112. Here, "one side of the cavity 112" refers to the opposite side of the cavity 112 described above, specifically the left side as shown in the front view. To input the electrical signals received from the printed circuit board 130 into the cavity 112, the connector can be configured as a component independent of the resonator panel 210. In contrast, the connector, as part of the resonator panel 210, can be configured as either an input section 214 or an output section 215. In this case, the connector can be attached to the front of the printed circuit board 130 using SMT (Surface Mount Technology).

[0064] Connector 120 can be configured as a hollow type, allowing output section 215 to pass through connector 120 along the height direction of cavity 112. The height of connector 120 can be greater than the height of filter housing 110. Connector 120 can be made of a material with greater rigidity than mainboards 110-1 to 110-4. Because connector 120 is taller and more rigid than filter housing 110, it protects the communication equipment filter 100 when multiple boards are connected to the communication equipment filter 100, and also reduces insertion loss. For example, when multiple boards are connected to the communication equipment filter 100 using connector 120, the height of connector 120 creates a space between the multiple boards and the communication equipment filter 100. This space prevents contact between filter housing 110 and the multiple boards, thereby reducing damage to filter housing 110 and insertion loss. Furthermore, the weight of the board attached to the upper part of the filter is borne by the connector rather than the filter, and the weight is absorbed by the lower end of the connector (i.e., the lower end of the connector that passes through the filter and is placed on the lower part of the board). Thus, the weight of the board does not directly affect the filter, which can prevent filter damage and signal loss.

[0065] Connector 120 can be manufactured by forming a metal sheet using a deep drawing process and then using a cutting process. The deep drawing process refers to the press machining of a hollow container by applying pressure along the vertical direction to a punch and die with a depth shape in the center of a flat plate.

[0066] If connector 120 is manufactured using deep drawing and cutting processes, the manufacturing process can be as follows.

[0067] The metal sheet is placed on the die of a deep drawing press. The punch of the deep drawing press is activated and pressure is repeatedly applied to the metal sheet. If the punch applies pressure to the metal sheet, the metal sheet deforms according to the shape of the die. The metal shape is then formed using cutting processes such as laser cutting, needle cutting, or punch cutting.

[0068] The connector 120 is manufactured through deep drawing and cutting processes, thereby minimizing material loss during the manufacturing process of the connector 120.

[0069] Connector 120 may include a supporting part 121 and a radial part 122.

[0070] The support portion 121 can be formed by extending vertically from the lower part of the inner surface of the filter housing 110 toward the top surface of the filter housing 110. The support portion 121 can be configured to be integrally integrated with the filter housing 110 to cover the open portion 111. Therefore, the height of the support portion 121 can be greater than or equal to the height of the filter 100 for the communication device according to the first embodiment of this disclosure.

[0071] The support portion 121 may include a first support body 121-1 and a second support body 121-2. When at least one of the plurality of boards is connected to the connector 120, and the connector 120 experiences a normal stress along the direction of the printed circuit board 130, the first support body 121-1 can support the stiffness of the connector 120. The first support body 121-1 may be open along the placement direction of the cavity 112. Since a portion of the first support body 121-1 is open, a space can be formed between the cavity 112 and the connector 120. The second support body 121-2 may extend from the open end of the first support body 121-1 toward the length direction of the cavity 112. Based on the front view, the second support body 121-2 may partially overlap and integrally combine with at least a portion of the open portion 111. The second support body 121-2 may be integrally combined with at least a portion of the filter housing 110 using welding or brazing processes.

[0072] The radiating portion 122 may be configured to extend from one end of the support portion 121 and protrude toward the back side of the antenna plate. The radiating portion 122 may support the back side of the antenna plate. The radiating portion 122 may serve to ground the filter housing 110. The radiating portion 122 may include a first portion 122-1 and a second portion 122-2.

[0073] The first part 122-1 can be formed by extending directly from one end of the support part 121. The first part 122-1 can serve as a support for forming the second part 122-2. A dielectric 120-1 can be inserted into the first part 122-1. The dielectric 120-1 can enhance the rigidity of the connector 120, prevent foreign matter from flowing into the cavity 112, and prevent the loss of electrical signals input into the cavity 112. The dielectric 120-1 can be made of materials such as Teflon, polypropylene, polyamide, polystyrene, polycarbonate, polyphenylene sulfide, polyvinyl fluoride, or polytetrafluoroethylene.

[0074] The second part 122-2 can be formed radially from the first part 122-1 in the opposite direction to the support part 121. For example, the area of ​​the horizontal end face of the second part 122-2 can be larger the further away from the first part 122-1 it is. If the filter 100 for communication equipment is connected to the connecting plate, the filter 100 for communication equipment disclosed herein can increase its connection width by utilizing the radial part 122 in order to prevent irregular breakage between the filter and the plate caused by vibration, etc.

[0075] Figure 8 This is a perspective view of a filter for a communication device according to a second embodiment of the present disclosure.

[0076] Figure 9 This is an unfolded view of the filter housing according to the second embodiment of the present disclosure.

[0077] Figure 10 This is a bottom oblique view of the connector according to the second embodiment of the present disclosure.

[0078] Reference Figures 8 to 10 According to the second embodiment of the present disclosure, the filter 700 for communication devices may include all or part of a filter housing 710, at least one connector 720, a resonator panel (not shown), and a frequency tuning panel (not shown).

[0079] Except for the components specifically described below, the components in the second embodiment of this disclosure are the same as those in the first embodiment, and therefore detailed descriptions of the same parts are omitted.

[0080] The filter housing 710 according to the second embodiment of this disclosure does not include the opening 111. At least a portion of the connector 720 can penetrate and be inserted into the filter housing 710 according to the second embodiment of this disclosure, and is integrally combined with the filter housing 710.

[0081] Therefore, the motherboards 710-1 to 710-5 according to the second embodiment of this disclosure differ from the motherboards 110-1 to 110-4 in the first embodiment, and may further include a right end face forming panel 710-4. The right end face forming panel 710-4 can be folded from the front forming panel 710-1 along the same direction as the left end face forming panel 710-2 to form the right end face of the filter housing 710.

[0082] At least one of the front forming panel 710-1, the left end forming panel 710-2, the right end forming panel 710-4, the bottom forming panel 710-5, the top forming panel 710-3, and the cover plate 710-6 may include a hole through which at least one connector 720 passes.

[0083] At least one connector 720 can be coupled to and installed with the filter housing 710 after passing through the hole and cavity 712.

[0084] The connector 720 may include a support part 721, a connecting washer part 722, and a radiating part 723.

[0085] As in the first embodiment of this disclosure, the support unit 721 may include a first auxiliary body 721-1 and a second auxiliary body 721-2. However, unlike the first embodiment of this disclosure, the second auxiliary body 721-2 can be configured on top of the first auxiliary body to cover the open portion formed by the first auxiliary body 721-1. The second auxiliary body 721-2 covering at least a portion of the open portion of the first auxiliary body 721-1 is to reinforce the rigidity of the connector 720 and reduce the amount of material loss caused by the cutting process. The lower end of the first auxiliary body 721-1 can be integrally combined with the bottom surface.

[0086] The connecting washer portion 722 may extend from the lower end of the radiating portion 723. The connecting washer portion 722 may be integrally formed with the top or bottom surface of the filter housing 710. The connecting washer portion 722 may be integrally formed with the filter housing 710 by welding or brazing.

[0087] When assembling the components of a filter for communication equipment, the connector and the filter housing are not integrally joined. When the connector and filter housing are not integrally joined, irregular breaks in the connection between the filter housing and the connector may occur. These irregular breaks may damage the filter housing, leading to loss of the electrical signal input inside the cavity. According to the communication equipment filters 100 and 700 of this disclosure, by integrally joining the connectors 120 and 720 with the filter housings 110 and 710, irregular breaks in the connection between the connectors 120 and 720 and the filter housings 110 and 710 are prevented.

[0088] According to the communication equipment filters 100 and 700 disclosed herein, by manufacturing the motherboards 110-1 to 110-4 and 710-1 to 710-5 in a folding manner, the manufacturing process of the communication equipment filters 100 and 700 is minimized, thereby achieving the effect of saving manufacturing costs.

[0089] The above description is merely illustrative of the technical concept of this embodiment. For those skilled in the art, various modifications and variations can be made without departing from the essential characteristics of this embodiment. Therefore, this embodiment is not intended to limit the technical concept but is for illustrative purposes, and the scope of the technical concept is not limited by the described embodiment. The scope of protection of this embodiment should be interpreted based on the appended claims, and all technical concepts within the equivalent scope should be interpreted as falling within the scope of the rights of this embodiment.

[0090] [Explanation of reference numerals in the attached figures] 100: Filters for communication equipment; 110: Filter housing 111: Open section 112: Cavity 120: Connector according to the first embodiment; 130: Printed circuit board (PCB) 210: Resonator panel; 220: Frequency tuning panel [Cross-references to related applications] This patent application claims priority to Korean Patent Application No. 10-2023-0105533, filed on August 11, 2023 with the Korean Intellectual Property Office, the contents of which are incorporated herein by reference.

Claims

1. A filter for a communication device, characterized in that, include: A filter housing, which includes a cavity for performing frequency filtering; as well as At least one connector is integrally disposed with the filter housing and provides an electrical signal input to the cavity or an electrical signal input from the cavity to the outside of the cavity. The filter housing is formed by folding at least a portion of a main board made of conductive sheet material.

2. The filter for communication equipment as described in claim 1, characterized in that, The motherboard includes: A front panel is formed for forming the front of the filter housing; A panel for forming an end face, which is folded from one side of the front panel for forming to form one end face of the filter housing; and The bottom forming panel and the top forming panel are folded in the same direction from the lower and upper sides of the front forming panel, respectively, to form the bottom and top surfaces of the filter housing.

3. The filter for communication equipment as described in claim 2, characterized in that, It further includes a cover plate for forming the back side of the filter housing. The cavity is formed by folding the motherboard and then combining the cover plate with the folded motherboard into one piece.

4. The filter for communication equipment as described in claim 3, characterized in that, The filter housing includes an opening that opens to the other side of the cavity. By integrating the at least one connector with the filter housing, the other side of the cavity is covered.

5. The filter for communication equipment as described in claim 1, characterized in that, The motherboard includes: A front panel is formed for forming the front of the filter housing; A left end face forming panel and a right end face forming panel are respectively folded from the left and right sides of the front forming panel in the same direction to form the left end face and right end face of the filter housing; and The bottom forming panel and the top forming panel are folded in the same direction from the lower and upper sides of the front forming panel, respectively, to form the bottom and top surfaces of the filter housing.

6. The filter for communication equipment as described in claim 5, characterized in that, It further includes a cover plate for forming the back side of the filter housing. The cavity is formed by folding the motherboard and then combining the cover plate with the folded motherboard into one piece.

7. The filter for communication equipment as described in claim 6, characterized in that, At least one of the front forming panel, the left end face forming panel, the right end face forming panel, the bottom face forming panel, the top face forming panel, and the cover plate includes: A hole through which at least one connector passes. The at least one connector passes through the hole and the cavity, and is coupled to and installed with the filter housing.

8. The filter for communication equipment as described in claim 1, characterized in that, The at least one connector is joined to the filter housing by at least one of brazing and welding processes.

9. The filter for communication equipment as described in claim 1, characterized in that, The height of at least one connector is greater than the height of the filter housing.

10. The filter for communication equipment as claimed in claim 1, characterized in that, The at least one connector is made of a material with greater rigidity than the motherboard.

11. The filter for communication equipment as claimed in claim 1, characterized in that, The connector is formed by deep drawing a metal plate and then by cutting.

12. The filter for communication equipment as claimed in claim 1, characterized in that, Further includes: A resonator panel, which is connected to the at least one connector, and includes a plurality of resonators arranged inside the cavity along the length of the cavity; as well as A frequency tuning panel comprising a plurality of tuning bars arranged along the length of the cavity inside the cavity.

13. The filter for communication equipment as described in claim 12, characterized in that, The resonator panel further includes: A resonator connecting rod, which runs along the length of the cavity, is used to horizontally connect the plurality of resonators; and Multiple resonant characteristic segments are formed extending from the front end of the multiple resonators.

14. The filter for communication equipment as described in claim 12, characterized in that, Inside the cavity, the frequency tuning panel and the resonator panel are arranged at a distance.

15. The filter for communication equipment as described in claim 12, characterized in that, The frequency tuning panel is a rectangular, hollow frame. The plurality of tuning rods are respectively formed on the inner side of the frequency tuning panel, extending from one end to the other.

16. The filter for communication equipment as described in claim 12, characterized in that, The resonator panel and the frequency tuning panel are arranged as follows: Each of the plurality of tuning rods partially overlaps with each of the plurality of resonators along the width direction of the filter housing.

17. The filter for communication equipment as described in claim 12, characterized in that, The frequency tuning panel further includes: At least one coupling adjustment rod extends from one end to the other on the inner side of the frequency tuning panel and is arranged between adjacent tuning rods among the plurality of tuning rods, forming the same single layer with the plurality of tuning rods.

18. The filter for communication equipment as described in claim 12, characterized in that, The resonator panel and frequency tuning panel are joined to the filter housing using at least one of brazing and welding processes.

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