Large and small low-pass cascade combined filter

Abstract

The invention discloses a large and small low-pass cascade combined filter, and belongs to the field of filters. A large and small low-pass cascade combined filter comprises a cavity and further comprises an output connector and an input connector which are fixedly connected to the two sides of the cavity respectively. The sleeve assembly is arranged in the cavity, and a low-pass assembly is arranged in the sleeve assembly; the low-pass assembly comprises a first connecting rod and a second connecting rod which are fixedly connected, a large circular plate is arranged on the first connecting rod, a small circular plate is arranged on the outer wall of the second connecting rod, and the large circular plate and the small circular plate are both attached to the inner wall of the sleeve assembly; the output block and the input block are respectively connected with the output connector and the input connector; according to the broadband combiner, a conventional interval passband low-pass filter is changed into a combined scheme of large low pass and small low pass, so that the defect that strong coupling is difficult to realize in the design of the broadband combiner is overcome, and meanwhile, the problems that the interval passband low-pass filter is relatively long in design, difficult to process, high in cost, difficult to control and the like are solved.

Description

Technical Field

[0001] The invention relates to the technical field of filters, and in particular to a large and small low-pass cascade combination filter. Background Art

[0002] A low-pass filter is an electronic filtering device that allows signals below the cutoff frequency to pass through, but suppresses or attenuates signals above the cutoff frequency. The main function of a low-pass filter is to filter and adjust the input signal so that the high-frequency components in the output signal are weakened or eliminated, thereby retaining the low-frequency components. In signal processing, low-pass filters are often used to smooth signals, remove noise, suppress high-frequency interference, etc.

[0003] In the process of using low-pass filters, there is often a demand for interval passbands. If a conventional single low-pass component is used to achieve this, it will involve problems such as long product size, difficult processing and high cost. Based on this problem, this design proposes a combined filter that changes the conventional form of interval passband low-pass into a large and small flow combination scheme. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a large and small low-pass cascade combination filter.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A large and small low-pass cascade combination filter, comprising a cavity, and also comprising: An output connector and an input connector are respectively fixedly connected to two sides of the cavity; A sleeve assembly is arranged in the cavity, and a low-pass assembly is arranged in the sleeve assembly; The low-pass component comprises: A first connecting rod and a second connecting rod are fixedly connected, a large circular plate is provided on the first connecting rod, a small circular plate is provided on the outer wall of the second connecting rod, and both the large circular plate and the small circular plate are in contact with the inner wall of the sleeve assembly; The output block and the input block are connected to the output connector and the input connector respectively.

[0006] Preferably, the sleeve assembly comprises a large sleeve and a small sleeve, the large sleeve is fixedly connected to the small sleeve, the large circular plate abuts against the inner wall of the large sleeve, and the small circular plate abuts against the inner wall of the small sleeve.

[0007] Furthermore, there are three large circular plates and three small circular plates, the thickness of the large circular plate in the middle is greater than the thickness of the large circular plates on both sides, and the thickness of the small circular plate in the middle is greater than the thickness of the small circular plates on both sides.

[0008] Preferably, an output baffle is integrally formed on the output connector, an output fixing screw is provided on the output baffle, the output fixing screw passes through the output baffle and is threadably connected to the cavity, and an external thread is provided on the output connector.

[0009] Furthermore, an output core rod is provided inside the output joint, an output plug rod is provided on the output baffle, a first countersunk hole is provided on the output block, and the output plug rod is plugged into the first countersunk hole.

[0010] Furthermore, an input baffle is integrally formed on the input connector, an input fixing screw is disposed on the input baffle, and the input fixing screw passes through the input baffle and is threadedly connected to the cavity.

[0011] Furthermore, an input core rod is provided inside the input joint, an input plug rod is provided on the input baffle, a second countersunk hole is provided on the input block, and the input plug rod is plugged into the second countersunk hole.

[0012] Furthermore, the output baffle is provided with a first annular groove, the input baffle is provided with a second annular groove, the output block is connected in the first annular groove, and the input block is connected in the second annular groove.

[0013] Preferably, the diameter of the first connecting rod is greater than the diameter of the second connecting rod, and the diameter of the output block is greater than the diameter of the input block.

[0014] Preferably, the cross section of the cavity is configured to be rectangular, and the sleeve assembly is configured to be circular.

[0015] Compared with the prior art, the present invention provides a large and small low-pass cascade combination filter, which has the following beneficial effects: 1. The large and small low-pass cascade combination filter, by changing the conventional interval passband low-pass filter into a combination of a large low-pass and a small low-pass, forms a combination of large and small flows, which can make the signal smoother, reduce noise interference, make the signal change more continuous and stable, and can also filter out high-frequency noise in the signal, improve the quality and reliability of the signal, and reduce the bandwidth and energy consumption of the signal; through this design, the disadvantage of the difficulty in achieving strong coupling in the design of broadband combiner is solved, a relatively wide passband can be achieved, and the problems of long interval passband low-pass design, difficult processing, high cost, and difficult control are solved. The effect of the ultra-long low-pass is replaced by a smaller low-pass size and a solution that is easy to process and control.

[0016] 2. The large and small low-pass cascade combination filter can improve the filtering effect and stability by making the sleeve assembly and the low-pass assembly closely offset each other; it helps to form a transmission zero point above the cutoff frequency of the filter, thereby more effectively suppressing high-frequency signals and improving filtering performance; the fitted design can also enhance the fixation of the low-pass component in the sleeve assembly, reduce displacement or damage caused by vibration or external impact, improve the overall stability of the filter, and help to further smooth the signal, reduce jitter and mutation in the signal, and improve the quality and stability of the signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of a large and small low-pass cascade combination filter proposed by the present invention is shown in FIG. Figure 1 ; Figure 2 The structure of a large and small low-pass cascade combination filter proposed by the present invention is shown in FIG. Figure 2 ; Figure 3 A cross-sectional view of a large and small low-pass cascade combination filter proposed by the present invention; Figure 4 A cross-sectional view of a large and small low-pass cascade combination filter proposed by the present invention; Figure 5 A schematic diagram of the structure of a sleeve assembly in a large and small low-pass cascade combination filter proposed by the present invention; Figure 6 A schematic diagram of the structure of a low-pass component in a large and small low-pass cascade combination filter proposed by the present invention; Figure 7 It is an enlarged view of the A part of the large and small low-pass cascade combination filter circuit 4 proposed by the present invention.

[0018] In the figure: 1, cavity; 2, output connector; 201, output baffle; 202, output fixing screw; 203, output core rod; 204, output plug rod; 205, first annular groove; 206, external thread; 3, input connector; 301, input baffle; 302, input fixing screw; 303, input core rod; 304, input plug rod; 305, second annular groove; 4, sleeve assembly; 401, large sleeve; 402, small sleeve; 5, low-pass assembly; 501, first connecting rod; 502, second connecting rod; 503, large circular plate; 504, small circular plate; 505, output block; 506, first countersunk hole; 507, input block; 508, second countersunk hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0021] Reference Figure 1-Figure 7 A large and small low-pass cascade combination filter comprises a cavity 1, and also comprises an output connector 2 and an input connector 3 respectively fixedly connected to both sides of the cavity 1; a sleeve assembly 4 is arranged in the cavity 1, and a low-pass assembly 5 is arranged in the sleeve assembly 4; the low-pass assembly 5 comprises: a first connecting rod 501 and a second connecting rod 502 which are fixedly connected, a large circular plate 503 is arranged on the first connecting rod 501, and a small circular plate 504 is arranged on the outer wall of the second connecting rod 502, and the large circular plate 503 and the small circular plate 504 are both in contact with the inner wall of the sleeve assembly 4; an output block 505 and an input block 507 are respectively connected to the output connector 2 and the input connector 3.

[0022] In this embodiment, when in use, the output connector 2 and the input connector 3 are first connected to the two ends of the filter cavity 1 respectively, and the signal can be input through the input connector 3, and the filtered signal can be output through the output connector 2. After the signal enters the filter cavity 1 through the input connector 3, it will first enter the low-pass component 5 inside the sleeve component 4. Specifically, the low-pass component 5 includes a large circular plate 503 connected to the first connecting rod 501 and a small circular plate 504 connected to the second connecting rod 502. The large circular plate 503 and the small circular plate 504 can make the low-pass component 5. The combination of large and small flows can make the signal smoother, reduce noise interference, make the signal change more continuous and stable, and filter out high-frequency noise in the signal, improve the quality and reliability of the signal, and reduce the bandwidth and energy consumption of the signal. This design solves the disadvantage of the difficulty in achieving strong coupling in the design of broadband combiners, and can achieve a relatively wide passband. It solves the problems of long interval passband low-pass design, difficult processing, high cost, and difficult control, and uses a smaller low-pass size and a solution that is easy to process and control to replace the effect of an ultra-long low-pass. Example

[0023] Reference Figure 1-Figure 7A large and small low-pass cascade combination filter comprises a cavity 1, and also comprises an output connector 2 and an input connector 3 respectively fixedly connected to both sides of the cavity 1; a sleeve assembly 4 is arranged in the cavity 1, and a low-pass assembly 5 is arranged in the sleeve assembly 4; the low-pass assembly 5 comprises: a first connecting rod 501 and a second connecting rod 502 which are fixedly connected, a large circular plate 503 is arranged on the first connecting rod 501, and a small circular plate 504 is arranged on the outer wall of the second connecting rod 502, and the large circular plate 503 and the small circular plate 504 are both in contact with the inner wall of the sleeve assembly 4; an output block 505 and an input block 507 are respectively connected to the output connector 2 and the input connector 3.

[0024] The sleeve assembly 4 includes a large sleeve 401 and a small sleeve 402 . The large sleeve 401 is fixedly connected to the small sleeve 402 . The large circular plate 503 abuts against the inner wall of the large sleeve 401 , and the small circular plate 504 abuts against the inner wall of the small sleeve 402 .

[0025] There are three large circular plates 503 and three small circular plates 504 . The thickness of the large circular plate 503 in the middle is greater than the thickness of the large circular plates 503 on both sides. The thickness of the small circular plate 504 in the middle is greater than the thickness of the small circular plates 504 on both sides.

[0026] In this embodiment, the sleeve assembly 4 and the low-pass assembly 5 can be closely abutted against each other, which improves the filtering effect and stability; helps to form a transmission zero point above the cutoff frequency of the filter, thereby more effectively suppressing high-frequency signals and improving filtering performance; the fitted design can also enhance the fixation of the low-pass assembly 5 in the sleeve assembly 4, reduce displacement or damage caused by vibration or external impact, improve the overall stability of the filter, and help to further smooth the signal, reduce jitter and mutation in the signal, and improve the quality and stability of the signal. Example

[0027] Reference Figure 1-Figure 7 A large and small low-pass cascade combination filter comprises a cavity 1, and also comprises an output connector 2 and an input connector 3 respectively fixedly connected to both sides of the cavity 1; a sleeve assembly 4 is arranged in the cavity 1, and a low-pass assembly 5 is arranged in the sleeve assembly 4; the low-pass assembly 5 comprises: a first connecting rod 501 and a second connecting rod 502 which are fixedly connected, a large circular plate 503 is arranged on the first connecting rod 501, and a small circular plate 504 is arranged on the outer wall of the second connecting rod 502, and the large circular plate 503 and the small circular plate 504 are both in contact with the inner wall of the sleeve assembly 4; an output block 505 and an input block 507 are respectively connected to the output connector 2 and the input connector 3.

[0028] An output baffle 201 is integrally formed on the output connector 2 , and an output fixing screw 202 is provided on the output baffle 201 . The output fixing screw 202 passes through the output baffle 201 and is threadedly connected to the cavity 1 . An external thread 206 is provided on the output connector 2 .

[0029] An output core rod 203 is provided inside the output connector 2 , an output plug rod 204 is provided on the output baffle 201 , a first countersunk hole 506 is provided on the output block 505 , and the output plug rod 204 is inserted into the first countersunk hole 506 .

[0030] When in use, the output baffle 201 can be fixedly installed on the cavity 1 by the output fixing screw 202, so that the connection of the output connector 2 is more stable, and the output core rod 203 on the output connector 2 can transmit the signal processed by the filter for use by subsequent circuits or equipment. When in use, the output plug rod 204 is inserted into the first countersunk hole 506, which can make the filtered signal easier to output and the output connector 2 easier to connect with the low-pass component 5. The external thread 206 provided can make it easier for the output connector 2 to install an external pipeline, etc.

[0031] An input baffle 301 is integrally formed on the input connector 3 , and an input fixing screw 302 is disposed on the input baffle 301 . The input fixing screw 302 passes through the input baffle 301 and is threadedly connected to the cavity 1 .

[0032] An input core rod 303 is provided inside the input joint 3 , an input plug rod 304 is provided on the input baffle 301 , a second countersunk hole 508 is provided on the input block 507 , and the input plug rod 304 is inserted into the second countersunk hole 508 .

[0033] When in use, the input baffle 301 can be fixedly installed on the cavity 1 through the input fixing screw 302, so that the input connector 3 can be connected more stably. The input core rod 303 on the input connector 3 is responsible for receiving and transmitting external signals into the filter for subsequent signal processing. When in use, the input plug rod 304 is inserted into the second countersunk hole 508, which can make the filtered signal easier to input and facilitate the connection between the input connector 3 and the low-pass component 5.

[0034] The output baffle 201 is provided with a first annular groove 205 , the input baffle 301 is provided with a second annular groove 305 , the output block 505 is connected in the first annular groove 205 , and the input block 507 is connected in the second annular groove 305 .

[0035] In the present application, the output baffle 201 and the input baffle 301 are further provided with a first annular groove 205 and a second annular groove 305, respectively. During installation, the low-pass component 5 is first installed in the sleeve component 4, and then the sleeve component 4 is installed in the cavity 1, and then the input baffle 301 and the output baffle 201 are respectively connected to the two sides of the cavity 1. When the output baffle 201 is fixed by the output fixing screw 202, the output block 505 located on the low-pass component 5 is just placed in the first annular groove 205. At the same time, the output plug rod 204 is inserted into the first countersunk hole 506, so that the output block 505 can be connected. The connection is tighter, thereby improving the connection stability of the low-pass component 5. Secondly, similarly, when the input baffle 301 is installed, the input block 507 will be installed in the second annular groove 305. At the same time, the input plug rod 304 will be inserted in the second countersunk hole 508, which will also improve the stability of the low-pass component 5. While ensuring the stability of the low-pass component 5, therefore, in the present application, the conventional interval passband low-pass filter is changed to a combination of a large low-pass and a small low-pass, which effectively solves the disadvantage that it is difficult to achieve strong coupling in the design of a broadband combiner, and can achieve a relatively wide passband. In addition, the present application is easy to process, reduces costs, and is easier to control. Example

[0036] Reference Figure 1-Figure 7 A large and small low-pass cascade combination filter comprises a cavity 1, and also comprises an output connector 2 and an input connector 3 respectively fixedly connected to both sides of the cavity 1; a sleeve assembly 4 is arranged in the cavity 1, and a low-pass assembly 5 is arranged in the sleeve assembly 4; the low-pass assembly 5 comprises: a first connecting rod 501 and a second connecting rod 502 which are fixedly connected, a large circular plate 503 is arranged on the first connecting rod 501, and a small circular plate 504 is arranged on the outer wall of the second connecting rod 502, and the large circular plate 503 and the small circular plate 504 are both in contact with the inner wall of the sleeve assembly 4; an output block 505 and an input block 507 are respectively connected to the output connector 2 and the input connector 3.

[0037] The diameter of the first connecting rod 501 is greater than the diameter of the second connecting rod 502 , and the diameter of the output block 505 is greater than the diameter of the input block 507 .

[0038] In the present application, by changing the conventional interval passband low-pass filter to a combination of a large low-pass and a small low-pass, the disadvantage of difficulty in achieving strong coupling in the design of a broadband combiner is effectively solved, a relatively wide passband can be achieved, and the present application is easy to process, reduces costs, and is easier to control.

[0039] The cross-section of the cavity 1 is set to a rectangle, and the sleeve assembly 4 is set to a circle. By setting it to a circle, the connection effect between the low-pass component 5 and the sleeve assembly 4 can be made more stable, while ensuring that the connection between the sleeve assembly 4 and the cavity 1 is more stable, reducing displacement or damage caused by vibration or external impact, improving the overall stability of the filter, and helping to further smooth the signal, reduce jitter and mutation in the signal, and improve the quality and stability of the signal.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large and small low-pass cascade combination filter, comprising a cavity (1), characterized in that: Also includes: An output connector (2) and an input connector (3) respectively fixedly connected to two sides of the cavity (1); A sleeve assembly (4) is arranged in the cavity (1), and a low-pass assembly (5) is arranged in the sleeve assembly (4); The low-pass component (5) comprises: A first connecting rod (501) and a second connecting rod (502) are fixedly connected, a large circular plate (503) is provided on the first connecting rod (501), and a small circular plate (504) is provided on the outer wall of the second connecting rod (502), and the large circular plate (503) and the small circular plate (504) are both in contact with the inner wall of the sleeve assembly (4); The output block (505) and the input block (507) are connected to the output connector (2) and the input connector (3) respectively.

2. A large and small low-pass cascade combination filter according to claim 1, characterized in that: The sleeve assembly (4) comprises a large sleeve (401) and a small sleeve (402), wherein the large sleeve (401) is fixedly connected to the small sleeve (402), the large circular plate (503) abuts against the inner wall of the large sleeve (401), and the small circular plate (504) abuts against the inner wall of the small sleeve (402).

3. A large and small low-pass cascade combination filter according to claim 2, characterized in that: There are three large circular plates (503) and three small circular plates (504), the thickness of the large circular plate (503) located in the middle is greater than the thickness of the large circular plates (503) located on both sides, and the thickness of the small circular plate (504) located in the middle is greater than the thickness of the small circular plates (504) located on both sides.

4. A large and small low-pass cascade combination filter according to claim 1 or 3, characterized in that: An output baffle (201) is integrally formed on the output connector (2), an output fixing screw (202) is provided on the output baffle (201), the output fixing screw (202) passes through the output baffle (201) and is threadedly connected to the cavity (1), and an external thread (206) is provided on the output connector (2).

5. A large and small low-pass cascade combination filter according to claim 4, characterized in that: An output core rod (203) is provided inside the output joint (2), an output plug rod (204) is provided on the output baffle (201), a first countersunk hole (506) is provided on the output block (505), and the output plug rod (204) is plugged into the first countersunk hole (506).

6. A large and small low-pass cascade combination filter according to claim 5, characterized in that: An input baffle (301) is integrally formed on the input connector (3), and an input fixing screw (302) is provided on the input baffle (301). The input fixing screw (302) passes through the input baffle (301) and is threadedly connected to the cavity (1).

7. A large and small low-pass cascade combination filter according to claim 6, characterized in that: An input core rod (303) is provided inside the input joint (3), an input plug rod (304) is provided on the input baffle (301), a second countersunk hole (508) is provided on the input block (507), and the input plug rod (304) is plugged into the second countersunk hole (508).

8. A large and small low-pass cascade combination filter according to claim 7, characterized in that: The output baffle (201) is provided with a first annular groove (205), the input baffle (301) is provided with a second annular groove (305), the output block (505) is connected in the first annular groove (205), and the input block (507) is connected in the second annular groove (305).

9. A large and small low-pass cascade combination filter according to claim 1, characterized in that: The diameter of the first connecting rod (501) is greater than the diameter of the second connecting rod (502), and the diameter of the output block (505) is greater than the diameter of the input block (507).

10. The large and small low-pass cascade combination filter according to claim 1, characterized in that: The cross section of the cavity (1) is arranged to be rectangular, and the sleeve assembly (4) is arranged to be circular.

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