A dual-lid-panel shielded cavity zero filter

Abstract

This utility model discloses a double-cover shielded cavity zero-point filter, belonging to the field of filter technology. It includes a cavity, which is an I-shaped elongated structure. Several resonators are disposed within the cavity, with one end fixed to the cavity and the other end connected to a resonant rod. The resonators are arranged in a straight line within the cavity. The top of each resonator is a capacitor terminal, and the bottom is an inductor terminal. The capacitor and inductor terminals form a frequency conversion coupling to achieve a zero-point passband. Two covers are disposed on the front and back of the cavity, respectively, and are locked to the cavity by several locking attachments. This utility model eliminates the coupling screw, achieving zero-coupling adjustment-free operation. This eliminates the need for manual fine-tuning of the coupling screw, improving production efficiency. Furthermore, the removal of the coupling screw enhances the high-frequency performance of the filter. The double-cover design facilitates assembly.

Description

Technical Field

[0001] This utility model belongs to the field of filter technology, and in particular relates to a double-covered shielded cavity zero-point filter. Background Technology

[0002] In the field of high-frequency filter technology, especially in radio frequency communication and microwave systems, filters are used to screen signals of specific frequencies and suppress interference, making them key components for ensuring signal purity. Traditional shielded cavity filters typically rely on coupling screws to achieve inter-cavity coupling in order to construct filtering characteristics. However, this method has significant drawbacks: 1. Low debugging and production efficiency: The coupling screw requires precise debugging by professional personnel, which is time-consuming and labor-intensive, and seriously restricts the efficiency of mass production; 2. Insufficient high-frequency performance: In high-frequency scenarios, the parasitic parameters of the coupling screw can easily cause problems such as large passband ripple and poor out-of-band suppression. 3. Complex assembly and processing: Traditional structural designs are redundant, processing is difficult, and assembly processes are cumbersome; 4. Difficulty in achieving zero point in frequency conversion coupling: For applications requiring a passband zero point, existing technologies either result in large size and high cost due to structural redundancy, or the zero point position is difficult to control precisely, failing to meet the high efficiency and stability requirements of frequency conversion coupling in high-frequency scenarios.

[0003] In summary, existing high-frequency filters have shortcomings in terms of ease of processing and assembly, accuracy of frequency conversion coupling zero-point realization, and production efficiency. There is an urgent need for a double-cover shielded cavity zero-point filter to meet the pressing needs of the high-frequency communication field for filter performance and mass production capabilities. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art by providing a double-cover shielded cavity zero-point filter to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a double-cover shielded cavity zero-point filter, comprising... The cavity is an I-shaped elongated structure. Several resonators are installed inside the cavity. One end of each resonator is fixed inside the cavity, and the other end is connected to a resonant rod. The resonators are arranged in a straight line inside the cavity. The top of each resonator is a capacitor end, and the bottom is an inductor end. The capacitor end and the inductor end form a frequency conversion coupling to achieve a zero point in the passband. The cover plate, there are two cover plates respectively disposed on the front and back of the cavity, and the cover plates are locked to the cavity by a number of locking accessories.

[0006] In a preferred embodiment of this utility model, connectors are provided at both ends of the cavity, one connector is used for signal input, and the other connector is used for signal output.

[0007] In a preferred embodiment of the present invention, the two connectors are coaxially arranged at the ends of the cavity.

[0008] In a preferred embodiment of this utility model, the cavity end is provided with a mounting hole for mounting the cavity.

[0009] In a preferred embodiment of this utility model, one end of the resonant rod is installed in the cavity, and the other end is fixedly connected to the resonator.

[0010] In a preferred embodiment of this utility model, a rectangular cavity is provided inside the cavity, and the resonator is installed inside the rectangular cavity.

[0011] In a preferred embodiment of this invention, the cavity side is provided with several side outlet holes to connect the resonant rod to the outside.

[0012] This utility model solves the defects existing in the background technology, and has the following beneficial effects: This utility model's filter achieves zero coupling and requires no adjustment by eliminating the coupling screw. This eliminates the need for manual fine-tuning of the coupling screw, improving production efficiency. Furthermore, the removal of the coupling screw enhances the filter's high-frequency performance. The double-cover plate and cavity design facilitates assembly and improves efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present utility model; Figure 2 This is a partial structural schematic diagram of a preferred embodiment of the present invention; Figure 3 for Figure 2 Top view; Figure 4 for Figure 2 Side view; In the diagram: 10, cavity; 101, mounting hole; 102, side outlet hole; 11, resonator; 12, resonator rod; 20, cover plate; 30, locking element; 40, connector. Detailed Implementation

[0014] The following drawings will disclose several embodiments of this utility model. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these physical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0015] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0016] This embodiment provides a double-cover shielded cavity zero-point filter. This filter achieves zero coupling and no adjustment by eliminating the coupling screw. It eliminates the need for manual fine-tuning of the coupling screw, improving production efficiency. Furthermore, the removal of the coupling screw enhances the high-frequency performance of the filter. The combination of the double cover plate 20 and the cavity 10 makes it easy to assemble and improves efficiency.

[0017] Combination Figures 1 to 4 As shown, the dual-cover shielded cavity zero-point filter of this embodiment includes a cavity 10 and a cover plate 20. A plurality of resonators 11 are arranged inside the cavity 10. The cover plate 20 covers the front and back of the cavity 10. Its structure is simple and easy to assemble, which can effectively improve the assembly efficiency of the filter.

[0018] In this embodiment, the cavity 10 is an I-shaped elongated structure. One end of the resonator 11 is fixed inside the cavity 10, and the other end is connected to a resonant rod 12. The resonators 11 are arranged in a straight line inside the cavity 10. The top of the resonator 11 is the capacitor end, and the bottom is the inductor end. The capacitor end and the inductor end form a frequency conversion coupling to achieve a zero point in the passband. In this embodiment, the filter achieves frequency conversion coupling and a zero point in the passband under the combined action of the capacitor end and the inductor end of the resonator 11, thereby optimizing and eliminating the coupling screw and achieving the purpose of zero coupling and no adjustment.

[0019] Furthermore, in this embodiment, connectors 40 are connected to both ends of the cavity 10. One connector 40 is used for signal input, and the other connector 40 is used for signal output. The two connectors 40 are coaxially arranged at the ends of the cavity 10. In this embodiment, the connector 40 is a terminal coaxial connector 40, which is used to connect the filter to the outside to realize signal input and output operations.

[0020] Combination Figures 2 to 4 As shown, the cavity 10 in this embodiment has a mounting hole 101 at its end for mounting the cavity 10. One end of the resonant rod 12 is installed inside the cavity 10, and the other end is fixedly connected to the resonator 11. The cavity 10 has a rectangular cavity, and the resonator 11 is installed inside the rectangular cavity. The side of the cavity 10 has several side outlet holes 102 for connecting the resonant rod 12 to the outside. In this embodiment, the resonant rod 12 is a key component at the top of the resonator 11 and directly cooperates with the cover plate 20 of the filter. A stable capacitor is formed through the gap between the two, which is the core carrier of the capacitor end. Furthermore, it is integrated with the inductor end at the bottom of the resonator 11 to form a complete resonant unit, ensuring precise matching of the inductor and capacitor, thereby achieving stable output of frequency conversion coupling and passband zero.

[0021] In this embodiment, there are two cover plates 20, which are respectively disposed on the front and back of the cavity 10. The cover plates 20 are locked to the cavity 10 by several locking attachments. The cover plates 20 and the cavity 10 are locked together to form a shielded cavity filter, which is easy to assemble and improves the structural stability of the filter.

[0022] In practical use, the dual-cover shielded cavity zero-point filter of this embodiment achieves zero coupling and no adjustment by optimizing and removing the coupling screw. It eliminates the need for manual fine-tuning of the coupling screw, thereby improving production efficiency. Furthermore, the removal of the coupling screw enhances the high-frequency performance of the filter. The combination of the dual cover plate 20 and the cavity 10 makes it easy to assemble and improves efficiency.

[0023] While the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the present invention. That is, the methods, systems, or devices discussed above are merely examples. Various configurations can be appropriately omitted, substituted, or added to various processes or components. For example, in alternative configurations, methods can be performed in a different order than described, and / or various stages can be added, omitted, and / or combined. Moreover, features described with respect to certain configurations can be combined in various other configurations. Different aspects and elements of the configuration can be combined in a similar manner. Furthermore, as technology develops, many elements are merely examples and do not limit the scope of this disclosure or the claims.

[0024] Specific details are provided in the specification to offer a thorough understanding of exemplary configurations, including implementations. However, configurations can be practiced without these specific details; for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail to avoid obscuring the configuration. This description provides only exemplary configurations and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes can be made to the function and arrangement of the elements without departing from the spirit or scope of this disclosure.

[0025] Furthermore, although each operation can be described as a sequential process, many operations can be executed in parallel or simultaneously. Additionally, the order of operations can be rearranged. A process may have additional steps. Moreover, examples of methods can be implemented using hardware, software, firmware, middleware, code, hardware description languages, or any combination thereof. When implemented in software, firmware, middleware, or code, the program code or code segments used to perform the necessary tasks can be stored in a non-transitory computer-readable medium such as a storage medium and executed by a processor.

[0026] In summary, the above detailed description is intended to be exemplary rather than limiting, and it should be understood that the claims (including all equivalents) are intended to define the spirit and scope of this invention. These embodiments should be understood as illustrative only and not as limiting the scope of protection of this invention. After reading the description of this invention, those skilled in the art can make various alterations or modifications to it, and these equivalent changes and modifications also fall within the scope defined by the claims of this invention.

Claims

1. A double-cover shielded cavity zero-point filter, characterized in that, include Cavity (10), the cavity (10) is an I-shaped long strip structure, and a plurality of resonators (11) are provided inside the cavity (10). One end of the resonator (11) is fixed inside the cavity (10), and the other end is connected to a resonant rod (12). The resonators (11) are arranged in a straight line inside the cavity (10). The top of the resonator (11) is a capacitor end and the bottom is an inductor end. The capacitor end and the inductor end form a frequency conversion coupling to achieve the zero point of the passband. Cover plate (20), there are two cover plates (20) respectively disposed on the front and back of the cavity (10), and the cover plates (20) are locked to the cavity (10) by a number of locking accessories.

2. The double-cover shielded cavity zero-point filter according to claim 1, characterized in that, Both ends of the cavity (10) are connected to connectors (40), one connector (40) for signal input and the other connector (40) for signal output.

3. A double-cover shielded cavity zero-point filter according to claim 2, characterized in that, The two connectors (40) are coaxially arranged at the ends of the cavity (10).

4. The double-cover shielded cavity zero-point filter according to claim 1, characterized in that, The cavity (10) is provided with a mounting hole (101) at its end for mounting the cavity (10).

5. A double-cover shielded cavity zero-point filter according to claim 1, characterized in that, One end of the resonant rod (12) is installed inside the cavity (10), and the other end is fixedly connected to the resonator (11).

6. A double-cover shielded cavity zero-point filter according to claim 1, characterized in that, The cavity (10) has a rectangular cavity, and the resonator (11) is installed in the rectangular cavity.

7. A double-cover shielded cavity zero-point filter according to claim 1, characterized in that, The cavity (10) has several side outlet holes (102) on its side to connect the resonant rod (12) to the outside.

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