Large and small low-pass cascade combined filter

Abstract

The utility model 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 utility model, a conventional interval passband low-pass filter is changed into a combination scheme of large low-pass and small low-pass, so that the defect that strong coupling is difficult to realize in the design of a broadband combiner is solved, 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 utility model relates to filter technical field especially relates to a big and small low pass cascade combination filter. BACKGROUND

[0002] Low pass filter is a kind of electronic filter device, it allows the signal below cut-off frequency to pass, but the signal above cut-off frequency is inhibited or attenuated;The main function of low pass filter is to filter and adjust input signal, so that the high-frequency component in output signal is weakened or eliminated, so as to retain low-frequency component;In signal processing, low pass filter is often used to smooth signal, remove noise, suppress high-frequency interference etc.

[0003] In the demand use process of low pass filter, there is often the demand of interval passband, if using conventional single low pass component to realize, it will involve the problems such as product size is relatively long, processing is more difficult and cost is relatively high, based on this problem, the design proposes a combination filter that changes the conventional form of interval passband low pass to big and small flow combination scheme. UTILITY MODEL CONTENT

[0004] The utility model discloses a big and small low pass cascade combination filter to solve the problems in the prior art.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A big and small low pass cascade combination filter, comprising a cavity, further comprising:

[0007] Output connector and input connector fixedly connected on the two sides of the cavity respectively;

[0008] Sleeve assembly, set up in the cavity, and the sleeve assembly is equipped with low pass assembly in it;

[0009] The low pass assembly comprises:

[0010] First connecting rod and second connecting rod fixedly connected, first connecting rod is equipped with big round plate, the outer wall of second connecting rod is equipped with small round plate, and the big round plate and small round plate are all in close contact with the inner wall of sleeve assembly;

[0011] Output block and input block are connected with output connector and input connector respectively.

[0012] Preferably, the sleeve assembly comprises big sleeve and small sleeve, the big sleeve is fixedly connected with the small sleeve, the big round plate is in abutment with the inner wall of big sleeve, and the small round plate is in abutment with the inner wall of small sleeve.

[0013] Further, the large circular plates and small circular plates are all three, the thickness of the large circular plate in the middle is greater than the thickness of the large circular plate on both sides, and the thickness of the small circular plate in the middle is greater than the thickness of the small circular plate on both sides.

[0014] Preferably, the output joint is integrally formed with an output baffle, the output baffle is provided with an output fixing screw, the output fixing screw passes through the output baffle and is connected with the cavity thread, and the output joint is provided with an external thread.

[0015] Further, the output joint is internally provided with an output core rod, the output baffle is provided with an output insertion rod, the output block is provided with a first counterbore, and the output insertion rod is inserted into the first counterbore.

[0016] Further, the input joint is integrally formed with an input baffle, the input baffle is provided with an input fixing screw, the input fixing screw passes through the input baffle and is connected with the cavity thread.

[0017] Further, the input joint is internally provided with an input core rod, the input baffle is provided with an input insertion rod, the input block is provided with a second counterbore, and the input insertion rod is inserted into the second counterbore.

[0018] Further, 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.

[0019] 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.

[0020] Preferably, the cross section of the cavity is rectangular, and the sleeve assembly is circular.

[0021] Compared with the prior art, the low-pass cascade combination filter has the following beneficial effects:

[0022] 1. The low-pass cascade combination filter can make the signal smoother, reduce noise interference, make the signal change more continuous and stable, 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.

[0023] 2. This cascaded low-pass filter, by tightly fitting the sleeve assembly and the low-pass component together, improves filtering effect and stability; it helps to form a transmission zero above the filter's cutoff frequency, thereby more effectively suppressing high-frequency signals and improving filtering performance; the close-fitting design also enhances the fixation of the low-pass component within the sleeve assembly, reducing displacement or damage caused by vibration or external impact, improving the overall stability of the filter, and further smoothing the signal, reducing jitter and abrupt changes in the signal, and improving signal quality and stability. Attached Figure Description

[0024] Figure 1 This invention presents a schematic diagram of the structure of a cascaded low-pass filter of varying sizes. Figure 1 ;

[0025] Figure 2 This invention presents a schematic diagram of the structure of a cascaded low-pass filter of varying sizes. Figure 2 ;

[0026] Figure 3 This is a cross-sectional view of a cascaded low-pass filter of various sizes proposed in this utility model.

[0027] Figure 4 This is a front cross-sectional view of a cascaded low-pass filter proposed in this utility model.

[0028] Figure 5 This is a schematic diagram of the sleeve assembly in a cascaded low-pass filter of varying sizes proposed in this utility model;

[0029] Figure 6 This is a schematic diagram of the low-pass component in a cascaded low-pass filter of varying sizes proposed in this utility model;

[0030] Figure 7 This is an enlarged view of section A in path 4 of the large and small low-pass cascaded combined filter proposed in this utility model.

[0031] In the diagram: 1. Cavity; 2. Output connector; 201. Output baffle; 202. Output fixing screw; 203. Output core rod; 204. Output insertion rod; 205. First annular groove; 206. External thread; 3. Input connector; 301. Input baffle; 302. Input fixing screw; 303. Input core rod; 304. Input insertion 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

[0032] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0033] In the description of the utility model, it needs to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. EMBODIMENT

[0034] WITH REFERENCE TO Figures 1-7 A size low-pass cascade combination filter, comprising a cavity 1, further comprising output connectors 2 and input connectors 3 fixedly connected on both sides of the cavity 1 respectively; a sleeve assembly 4 is arranged in the cavity 1, and the sleeve assembly 4 is provided with a low-pass assembly 5; the low-pass assembly 5 comprises a first connecting rod 501 and a second connecting rod 502 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; the large circular plate 503 and the small circular plate 504 are in close contact with the inner wall of the sleeve assembly 4; an output block 505 and an input block 507 are connected with the output connectors 2 and the input connectors 3 respectively.

[0035] In the embodiment, in use, the output connectors 2 and the input connectors 3 are connected at both ends of the filter cavity 1 respectively, signals can be input through the input connectors 3, and filtered signals can be output through the output connectors 2; after the signals enter the filter cavity 1 through the input connectors 3, the signals first enter the low-pass assembly 5 inside the sleeve assembly 4; specifically, the low-pass assembly 5 comprises the large circular plate 503 connected to the first connecting rod 501 and the 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 assembly 5 form a combination mode of large and small flow, can make the signals smoother, reduce noise interference, make the signal change more continuous and stable, can also filter out high-frequency noise in the signals, improve the quality and reliability of the signals, and reduce the bandwidth and energy consumption of the signals; the design solves the difficulty in realizing strong coupling in the design of a wideband combiner, can realize a relatively wide passband, solves the problems of long interval passband low-pass design, difficult processing, high cost and difficult control, and replaces the effect of an ultra-long low-pass with a smaller low-pass size and a processing control scheme. EMBODIMENT

[0036] Referring to Figures 1-7 The size low-pass cascade combination filter comprises a cavity 1, further comprises output connectors 2 and input connectors 3 fixedly connected on both sides of the cavity 1 respectively; 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 first connecting rods 501 and second connecting rods 502 fixedly connected, a large circular plate 503 is arranged on the first connecting rod 501, small circular plates 504 are arranged on the outer walls of the second connecting rods 502, the large circular plate 503 and the small circular plates 504 are in close contact with the inner walls of the sleeve assembly 4; output blocks 505 and input blocks 507 are connected with the output connectors 2 and the input connectors 3 respectively.

[0037] The sleeve assembly 4 comprises a large sleeve 401 and a small sleeve 402, the large sleeve 401 is fixedly connected with the small sleeve 402, the large circular plate 503 is in abutment with the inner wall of the large sleeve 401, and the small circular plate 504 is in abutment with the inner wall of the small sleeve 402.

[0038] The large circular plate 503 and the small circular plate 504 are both provided with three, the thickness of the large circular plate 503 in the middle is greater than that of the large circular plates 503 on both sides, and the thickness of the small circular plate 504 in the middle is greater than that of the small circular plates 504 on both sides.

[0039] In the embodiment, the sleeve assembly 4 and the low-pass assembly 5 are in close abutment, the filtering effect and stability are improved, the transmission zero point is formed above the cutoff frequency of the filter, the high-frequency signal is more effectively suppressed, the filtering performance is improved, the design of close abutment can enhance the fixation of the low-pass assembly 5 in the sleeve assembly 4, the displacement or damage caused by vibration or external impact is reduced, the overall stability of the filter is improved, the signal is further smoothed, the jitter and mutation in the signal are reduced, and the quality and stability of the signal are improved. Embodiment

[0040] Referring to Figures 1-7 The size low-pass cascade combination filter comprises a cavity 1, further comprises output connectors 2 and input connectors 3 fixedly connected on both sides of the cavity 1 respectively; 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 first connecting rods 501 and second connecting rods 502 fixedly connected, a large circular plate 503 is arranged on the first connecting rod 501, small circular plates 504 are arranged on the outer walls of the second connecting rods 502, the large circular plate 503 and the small circular plates 504 are in close contact with the inner walls of the sleeve assembly 4; output blocks 505 and input blocks 507 are connected with the output connectors 2 and the input connectors 3 respectively.

[0041] The output baffle 201 is integrally formed on the output connector 2, and the output fixing screw 202 is arranged on the output baffle 201 and passes through the output baffle 201 and is in threaded connection with the cavity 1. The output connector 2 is provided with external threads 206.

[0042] The output core rod 203 is arranged in the output connector 2, the output plug rod 204 is arranged on the output baffle 201, the first counterbore 506 is arranged on the output block 505, and the output plug rod 204 is inserted into the first counterbore 506.

[0043] In use, the output baffle 201 is fixedly installed on the cavity 1 through the output fixing screw 202, so that the connection of the output connector 2 is more stable. The output core rod 203 on the output connector 2 can output the signal processed by the filter for subsequent circuit or equipment use. In use, the output plug rod 204 is inserted into the first counterbore 506, so that the filtered signal can be more easily output, and the output connector 2 can be easily connected with the low-pass assembly 5. The external threads 206 can facilitate the installation of the output connector 2 with external pipelines and the like.

[0044] The input baffle 301 is integrally formed on the input connector 3, and the input fixing screw 302 is arranged on the input baffle 301 and passes through the input baffle 301 and is in threaded connection with the cavity 1.

[0045] The input core rod 303 is arranged in the input connector 3, the input plug rod 304 is arranged on the input baffle 301, the second counterbore 508 is arranged on the input block 507, and the input plug rod 304 is inserted into the second counterbore 508.

[0046] In use, the input baffle 301 is fixedly installed on the cavity 1 through the input fixing screw 302, so that the connection of the input connector 3 is more stable. The input core rod 303 on the input connector 3 is responsible for receiving and transmitting external signals into the filter, so as to facilitate subsequent signal processing. In use, the input plug rod 304 is inserted into the second counterbore 508, so that the filtered signal can be more easily input, and the input connector 3 can be easily connected with the low-pass assembly 5.

[0047] The first annular groove 205 is arranged on the output baffle 201, the second annular groove 305 is arranged on the input baffle 301, 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.

[0048] In the application, the output baffle 201 and the input baffle 301 are respectively provided with a first annular groove 205 and a second annular groove 305. During installation, the low-pass assembly 5 is first installed in the sleeve assembly 4, then the sleeve assembly 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 on the low-pass assembly 5 is just placed in the first annular groove 205, and at the same time, the output plug rod 204 is inserted into the first counterbore 506, so that the output block 505 is connected more tightly, thereby improving the connection stability of the low-pass assembly 5. Secondly, in the same way, when the input baffle 301 is installed, the input block 507 is installed in the second annular groove 305, and at the same time, the input plug rod 304 is inserted into the second counterbore 508, which also improves the stability of the low-pass assembly 5. Therefore, in the application, the conventional interval passband low-pass filter is changed to a combination scheme of large low-pass and small low-pass, which effectively solves the disadvantage of difficult to realize strong coupling in the design of a wideband combiner, can realize a relatively wide passband, and is easy to process, reduces the cost, and is easy to control. EMBODIMENT

[0049] REFERENCE Figures 1-7 A large and small low-pass cascade combination filter, comprising a cavity 1, further comprising an output connector 2 and an input connector 3 fixedly connected to the two sides of the cavity 1 respectively; a sleeve assembly 4 arranged in the cavity 1, and the sleeve assembly 4 is provided with a low-pass assembly 5; the low-pass assembly 5 comprises: a first connecting rod 501 and a second connecting rod 502 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; an output block 505 and an input block 507 are respectively connected with the output connector 2 and the input connector 3.

[0050] 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.

[0051] In the application, the conventional interval passband low-pass filter is changed to a combination scheme of large low-pass and small low-pass, which effectively solves the disadvantage of difficult to realize strong coupling in the design of a wideband combiner, can realize a relatively wide passband, and is easy to process, reduces the cost, and is easy to control.

[0052] The cross section of the cavity 1 is set as a rectangle, and the sleeve assembly 4 is set as a circle, through setting as the circle, the connection effect between the low-pass assembly 5 and the sleeve assembly 4 is more stable, meanwhile, the connection between the sleeve assembly 4 and the cavity 1 is more stable, the displacement or damage caused by vibration or external impact is reduced, the overall stability of the filter is improved, and the signal is further smoothed, the jitter and mutation in the signal are reduced, and the quality and stability of the signal are improved.

[0053] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

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

2. A lowpass cascade combination filter of claim 1, characterized in that The sleeve assembly (4) comprises a large sleeve (401) and a small sleeve (402), the large sleeve (401) is fixedly connected with the small sleeve (402), the large circular plate (503) is in abutment with the inner wall of the large sleeve (401), and the small circular plate (504) is in abutment with the inner wall of the small sleeve (402).

3. A lowpass cascade combination filter of claim 2, characterized in that The large circular plate (503) and small circular plate (504) are all provided with three, the thickness of the large circular plate (503) in the middle is greater than that of the large circular plate (503) on both sides, and the thickness of the small circular plate (504) in the middle is greater than that of the small circular plate (504) on both sides.

4. A lowpass cascade combination filter according to claim 1 or 3, characterized in that The output baffle (201) is integrally formed on the output connector (2), the output fixing screw (202) is arranged on the output baffle (201), the output fixing screw (202) penetrates through the output baffle (201) and is connected with the cavity (1) in a threaded manner, and the output connector (2) is provided with an external thread (206).

5. A lowpass cascade combination filter of claim 4, characterized in that The output core rod (203) is arranged in the output connector (2), the output plug rod (204) is arranged on the output baffle (201), the first counterbore (506) is arranged on the output block (505), and the output plug rod (204) is inserted into the first counterbore (506).

6. A lowpass cascade combination filter of claim 5, characterized in that The input baffle (301) is integrally formed on the input connector (3), the input fixing screw (302) is arranged on the input baffle (301), and the input fixing screw (302) penetrates through the input baffle (301) and is connected with the cavity (1) in a threaded manner.

7. A lowpass cascade combination filter of claim 6, characterized in that The input core rod (303) is arranged in the input connector (3), the input plug rod (304) is arranged on the input baffle (301), the second counterbore (508) is arranged on the input block (507), and the input plug rod (304) is inserted into the second counterbore (508).

8. A lowpass cascade combination filter of claim 7, characterized in that The first annular groove (205) is arranged on the output baffle (201), the second annular groove (305) is arranged on the input baffle (301), 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 lowpass cascade combination filter of claim 1, wherein, The diameter of the first connecting rod (501) is greater than that of the second connecting rod (502), and the diameter of the output block (505) is greater than that of the input block (507).

10. A lowpass cascade combination filter of claim 1, wherein, The cross section of the cavity (1) is rectangular, and the sleeve assembly (4) is circular.

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