High-power ultra-wideband filter

Abstract

The invention discloses a high-power ultra-wideband filter, and belongs to the field of filters. A high-power ultra-wideband filter comprises a main cavity and further comprises an upper groove and a lower groove which are formed in the top and the bottom of the main cavity respectively, an upper cover plate is connected into the upper groove, and a lower cover plate is connected into the lower groove. The N-type input connector and the N-type output connector are connected to the outer walls of the two sides of the main cavity respectively; the cavity is formed in the main cavity, the inner walls of the two sides of the cavity are fixedly connected with a plurality of first resonance rods and a plurality of second resonance rods respectively, and the first resonance rods and the second resonance rods are arranged in a staggered mode; the filter is good in consistency and stable in performance, the assembling process is very simple and convenient to operate, no tin melting welding point exists, the bearing power of the filter is improved, the operation process is simplified, the production time is shortened, the production cost is greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a high-power ultra-wideband filter. Background Art

[0002] With the rapid development of communication technology, high-power ultra-wideband communication is widely used in electronic countermeasures, broadcast satellites, aerospace, etc., and high-power ultra-wideband communication is also one of the current research focuses in the field of communication technology; in the new era of the Internet of Everything and artificial intelligence, the demand for mobile communications is increasing, and the required communication capacity is also increasing. High-power ultra-wideband has become an inevitable choice for communication systems; the relative bandwidth of previous ultra-wideband filters is about 20%, and most of them use SMA coaxial interfaces. The resonant rod GAP of the inner cavity is relatively small, so the power capacity is also relatively small, which reduces the working efficiency of the communication system.

[0003] In the prior art, the connection between the port coaxial core and the first cavity resonant rod of the high-power ultra-wideband filter is achieved by a molten tin welding process. Since the main body is usually made of metal materials such as aluminum, copper, and steel, the heat dissipation is very fast, and the lap joint is prone to cold soldering and poor contact, resulting in unstable filter performance. In addition, the melting point of tin is relatively low. If the filter is operated at high power and high load for a long time, the tin at the lap joint will be melted, seriously affecting the normal operation of the communication system. In view of this, the present invention is specially proposed. 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 high-power ultra-wideband filter.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-power ultra-wideband filter, including a main cavity, and also including: an upper groove and a lower groove, which are respectively opened at the top and bottom of the main cavity, the upper groove is connected to an upper cover plate, and the lower groove is connected to a lower cover plate; an N-type input connector and an N-type output connector, which are respectively connected to the outer walls on both sides of the main cavity; a cavity, which is arranged in the main cavity, and the inner walls on both sides of the cavity are respectively fixedly connected to a first resonant rod and a second resonant rod, and the first resonant rod and the second resonant rod are each provided with a plurality, and the plurality of the first resonant rods and the second resonant rods are staggered.

[0006] Preferably, there is a first gap between the first resonant rod and the inner wall of the cavity, there is a second gap between the second resonant rod and the inner wall of the cavity, and a channel is formed between adjacent first resonant rods and second resonant rods.

[0007] Furthermore, the upper cover plate is provided with upper fixing screws, and the upper cover plate is fixedly connected in the upper groove by the upper fixing screws.

[0008] Furthermore, a tuning screw is threadedly connected to the upper cover plate, and a plurality of the tuning screws are provided. One end of the plurality of tuning screws placed in the cavity is respectively located in the first gap and the second gap.

[0009] Furthermore, the lower cover plate is connected with a lower fixing screw, and the lower cover plate is fixedly connected in the lower groove through the lower fixing screw.

[0010] Preferably, both the N-type input connector and the N-type output connector are provided with a fixing plate, the fixing plate is provided with connector fixing screws, and the fixing plate is fixedly connected to the outer wall of the main cavity through the connector fixing screws.

[0011] Furthermore, the N-type input connector is provided with an input joint, the N-type output connector is provided with an output joint, and one end of the N-type input connector and the N-type output connector placed in the main cavity are both provided with an inner core probe.

[0012] Furthermore, a first external thread is provided on the inner core probe located on the N-type input connector, a second external thread is provided on the inner core probe located on the N-type output connector, threaded holes are provided on the first resonant rod and the second resonant rod located on both sides, and the first external thread and the second external thread are threadedly connected to the threaded holes.

[0013] Furthermore, circular holes are provided on both side walls of the main cavity, and the inner core probe is inserted into the circular holes.

[0014] Preferably, a connecting hole is provided on the bottom outer wall of the main cavity.

[0015] Compared with the prior art, the present invention provides a high-power ultra-wideband filter, which has the following beneficial effects: 1. The connection method between the inner core probe and the resonant rod of this high-power ultra-wideband filter is threaded matching and fastening. This process not only has good consistency and stable performance, but also is very easy to assemble. There is no need for tin melting and welding. Without tin melting and welding points, the power bearing capacity of the filter is improved. This simplifies the operation process and shortens the production time, so it greatly reduces the production cost and improves the production efficiency.

[0016] 2. In the high-power ultra-wideband filter, one end of the first resonant rod and the second resonant rod are connected to the inner walls of the respective cavities and are located in the middle thereof, and there are unequal spacings of 1.2mm-3mm between adjacent first resonant rods and second resonant rods, and there are unequal gaps of 2mm-3mm between the other ends of the first resonant rod and the inner wall of the cavity on the opposite side, which can improve the power capacity of the filter. The larger the gap, the greater the relative power capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a high-power ultra-wideband filter proposed by the present invention; Figure 2 This is a schematic diagram of the structure of the bottom of a high-power ultra-wideband filter proposed by the present invention; Figure 3 A schematic cross-sectional view of a high-power ultra-wideband filter proposed by the present invention; Figure 4 A top view of a high-power ultra-wideband filter proposed by the present invention; Figure 5 This is a schematic diagram of the structure of a high-power ultra-wideband filter proposed by the present invention without an upper cover plate and a lower cover plate; Figure 6 A bottom view of a high-power ultra-wideband filter without a lower cover plate provided by the present invention; Figure 7 A schematic diagram of the structure of a threaded hole in a high-power ultra-wideband filter proposed by the present invention; Figure 8 A schematic diagram of the structure of an N-type input connector in a high-power ultra-wideband filter proposed by the present invention Figure 1 ; Fig. 9 A schematic diagram of the structure of an N-type input connector in a high-power ultra-wideband filter proposed by the present invention Figure 2 ; Fig.10 A high-power ultra-wideband filter proposed by the present invention Figure 5 A magnified schematic diagram of part A; Fig.11 This is a function curve diagram of a high-power ultra-wideband filter proposed by the present invention.

[0018] In the figure: 1, main cavity; 101, upper groove; 102, lower groove; 103, connecting hole; 104, round hole; 2, N-type input connector; 201, N-type output connector; 202, fixing plate; 203, connector fixing screw; 204, input connector; 205, output connector; 206, first external thread; 207, second external thread; 208, inner core probe; 3, upper cover plate; 301, tuning screw; 302, upper fixing screw; 4, lower cover plate; 401, lower fixing screw; 5, cavity; 501, first resonant rod; 502, second resonant rod; 503, first gap; 504, second gap; 505, threaded 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 11 A high-power ultra-wideband filter comprises a main cavity 1, and also comprises an upper groove 101 and a lower groove 102 respectively opened at the top and the bottom of the main cavity 1, wherein an upper cover plate 3 is connected in the upper groove 101, and a lower cover plate 4 is connected in the lower groove 102, and an N-type input connector 2 and an N-type output connector 201 are fixedly connected to the outer walls on both sides of the main cavity 1, respectively, a cavity 5 is arranged in the main cavity 1, and a first resonant rod 501 and a second resonant rod 502 are fixedly connected to the inner walls on both sides of the cavity 5, and a plurality of the first resonant rods 501 and the second resonant rods 502 are provided, and the plurality of first resonant rods 501 and the second resonant rods 502 are staggered.

[0022] In this embodiment, when in use, firstly, the N-type input connector 2 and the N-type output connector 201 are connected to the two ends of the main cavity 1 respectively, and the signal can be input through the N-type input connector 2, so that the signal enters the main cavity 1, and eight first resonance rods 501 and eight second resonance rods 502 are respectively arranged on the two lateral sides of the main cavity 1, one end of the first resonance rod 501 and the second resonance rod 502 are connected to the inner wall of the cavity 5 respectively and are located in the middle position thereof, and there is an unequal spacing of 1.2mm-3mm between adjacent first resonance rods 501 and second resonance rods 502, and the other ends of the first resonance rod 501 and the second resonance rod 502 are provided with a gap of 2mm-3mm with the inner wall of the cavity 5 on the opposite side, and the signal input by the N-type input connector 2 will pass through the gap of 2mm-3mm, which can improve the power capacity of the filter, and the larger the gap, the larger the relative carrying power capacity, and then the signal is output through the N-type output connector 201 on the other side of the main cavity 1, so as to facilitate subsequent use.

[0023] The upper and lower sides of the main cavity 1 are penetrated, and an upper groove 101 and a lower groove 102 are respectively provided, which are convenient for the installation of the upper cover plate 3 and the lower cover plate 4, and at the same time, it is convenient for machining feed, and both sides can be hollowed out.

[0024] Specifically, the N-type input connector 2 and the N-type output connector 201 are used for the input and output ends of the filter to achieve stable signal transmission. They are used as interfaces to connect the filter with other RF devices or antennas to ensure smooth signal flow. They support wideband transmission, usually up to 11GHz or higher, to meet the needs of high-frequency signal transmission, and can effectively prevent external interference, ensure the stability and reliability of signal transmission. They can withstand higher power levels and are suitable for high-power RF equipment to ensure transmission quality. They have high reliability and stability and can adapt to harsh environments.

[0025] The passband of the filter in this application is 8GHz-13GHz, the bandwidth reaches 4.5GHz, and a relative bandwidth of 45% is achieved. The out-of-band suppression effect is very good, and the near-end is 7.2GHz, which is below 90dB. This greatly improves the working efficiency of the communication system; simplifies the operation process, shortens the production time, and thus greatly reduces the production cost and improves the production efficiency. Example

[0026] Reference Figure 1-Figure 11 A high-power ultra-wideband filter comprises a main cavity 1, and also comprises an upper groove 101 and a lower groove 102 respectively opened at the top and the bottom of the main cavity 1, wherein an upper cover plate 3 is connected in the upper groove 101, and a lower cover plate 4 is connected in the lower groove 102, and an N-type input connector 2 and an N-type output connector 201 are fixedly connected to the outer walls on both sides of the main cavity 1, respectively, a cavity 5 is arranged in the main cavity 1, and a first resonant rod 501 and a second resonant rod 502 are fixedly connected to the inner walls on both sides of the cavity 5, and a plurality of the first resonant rods 501 and the second resonant rods 502 are provided, and the plurality of first resonant rods 501 and the second resonant rods 502 are staggered.

[0027] Reference Figure 3 , Figure 5 , Figure 6 and Fig.10 There is a first gap 503 between the first resonant rod 501 and the inner wall of the cavity 5 , there is a second gap 504 between the second resonant rod 502 and the inner wall of the cavity 5 , and a channel is formed between the adjacent first resonant rods 501 and second resonant rods 502 .

[0028] In this embodiment, there is an unequal spacing of 1.2mm-3mm between the adjacent first resonant rods 501 and the second resonant rods 502, and the lengths of the first gap 503 and the second gap 504 are 2mm-3mm. The power capacity of the filter can be improved by the gap of 2mm-3mm. The larger the gap, the greater the relative power capacity, and the formed channel can provide more convenient for the signal to pass through.

[0029] Reference Figure 1 , Figure 3 and Figure 4 The upper cover plate 3 is provided with upper fixing screws 302 , and the upper cover plate 3 is fixedly connected in the upper groove 101 through the upper fixing screws 302 .

[0030] Reference Figure 1 , Figure 3 and Figure 4 A tuning screw 301 is threadedly connected to the upper cover plate 3, and a plurality of tuning screws 301 are provided. One end of the plurality of tuning screws 301 is placed in the cavity 5 and is respectively in the first gap 503 and the second gap 504.

[0031] Specifically, a tuning screw 301 is provided on the upper cover plate 3, and one end of the tuning screw 301 inserted into the cavity 5 is respectively arranged at the tail end of the first resonance rod 501 and the second resonance rod 502, that is, one end of the tuning screw 301 inserted into the cavity 5 is respectively arranged in the first gap 503 and the second gap 504, and a nut is provided above the tuning screw 301 for fixing, so as to fix the position of the tuning screw 301. In the high-power ultra-wideband filter of the present invention, its electrical performance can be adjusted to the optimal state through the tuning screw 301, and the tolerance influence caused by the machining process is solved. The upper cover plate 3 can be fixed by the upper fixing screw 302.

[0032] Reference Figure 2 and Figure 3 The lower cover plate 4 is connected with a lower fixing screw 401, and the lower cover plate 4 is fixedly connected to the lower groove 102 by the lower fixing screw 401; the lower cover plate 4 is fixed to the lower groove 102 on the lower side of the main cavity 1 by the lower fixing screw 401, and can cooperate with the upper cover plate 3 to seal the cavity 5 on the main cavity 1, thereby forming a high-power ultra-wideband filter. Example

[0033] Reference Figure 1-Figure 11 A high-power ultra-wideband filter comprises a main cavity 1, and also comprises an upper groove 101 and a lower groove 102 respectively opened at the top and the bottom of the main cavity 1, wherein an upper cover plate 3 is connected in the upper groove 101, and a lower cover plate 4 is connected in the lower groove 102, and an N-type input connector 2 and an N-type output connector 201 are fixedly connected to the outer walls on both sides of the main cavity 1, respectively, a cavity 5 is arranged in the main cavity 1, and a first resonant rod 501 and a second resonant rod 502 are fixedly connected to the inner walls on both sides of the cavity 5, and a plurality of the first resonant rods 501 and the second resonant rods 502 are provided, and the plurality of first resonant rods 501 and the second resonant rods 502 are staggered.

[0034] Reference Figure 1-Figure 6 , Figure 8 and Fig. 9Both the N-type input connector 2 and the N-type output connector 201 are provided with a fixing plate 202 , and the fixing plate 202 is provided with a connector fixing screw 203 . The fixing plate 202 is fixedly connected to the outer wall of the main cavity 1 through the connector fixing screw 203 .

[0035] Reference Figure 1-Figure 6 , Figure 8 and Fig. 9 The N-type input connector 2 is provided with an input connector 204 , the N-type output connector 201 is provided with an output connector 205 , and one end of the N-type input connector 2 and the N-type output connector 201 placed in the main cavity 1 is provided with an inner core probe 208 .

[0036] Reference Figure 1-Figure 6 , Figure 8 and Fig. 9 A first external thread 206 is provided on the inner core probe 208 located on the N-type input connector 2, and a second external thread 207 is provided on the inner core probe 208 located on the N-type output connector 201. Threaded holes 505 are provided on the first resonant rod 501 and the second resonant rod 502 located on both sides, and the first external thread 206 and the second external thread 207 are both threadedly connected to the threaded holes 505.

[0037] Reference Figure 7 , circular holes 104 are provided on both side walls of the main cavity 1 , and the inner core probe 208 is inserted into the circular holes 104 .

[0038] In this embodiment, when installing the N-type input connector 2 and the N-type output connector 201, first, the fixing plate 202 is pressed against the outer wall of the main cavity 1, and at the same time, the inner core probes 208 on the N-type input connector 2 and the N-type output connector 201 are respectively inserted into the round holes 104, and then the fixing plate 202 is fixed by the connector fixing screws 203, so as to achieve the fixation of the N-type input connector 2 and the N-type output connector 201.

[0039] Specifically, the first resonant rod 501 and the second resonant rod 502 at both ends are provided with M3 threaded holes 505, and the threaded holes 505 are arranged horizontally through. The fixing plates 202 on the N-type input connector 2 and the N-type output connector 201 specifically adopt standard four-hole flanges, and the tails of the inner core probes 208 of the N-type input connector 2 and the N-type output connector 201 are respectively provided with M3 first external threads 206 and second external threads 207. During assembly, the inner core probes 208 on the N-type input connector 2 and the N-type output connector 201 are respectively matched and tightened with the M3 threaded holes 505 on the first resonant rod 501 and the second resonant rod 502 at both ends, and then the fixing plates 202 are fixed to the two ends of the main cavity 1 by the connector fixing screws 203 to form the input and output ports of the filter.

[0040] Reference Figure 2 A connecting hole 103 is provided on the bottom outer wall of the main cavity 1 to facilitate the installation of the main cavity 1.

[0041] In actual use, the passband of the filter is 8GHz-13GHz, the bandwidth reaches 4.5GHz, and a relative bandwidth of 45% is achieved, and the out-of-band suppression effect is very good, the near-end is 7.2GHz, below 90dB, which greatly improves the working efficiency of the communication system; the high-power ultra-wideband filter of the present invention has an N-type interface for input and output ports, and the connection method between the inner core probe 208 and the resonant rod adopts a threaded matching and fastening connection. This process not only has good consistency and stable performance, but also the assembly process is very simple to operate, and there is no need for tin melting and welding. Without tin melting welding points, the power bearing capacity of the filter is also improved. This simplifies the operation process and shortens the production time, so it greatly reduces the production cost and improves the production efficiency.

[0042] 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 high-power ultra-wideband filter, comprising a main cavity (1), characterized in that: Also includes: An upper groove (101) and a lower groove (102) are respectively provided at the top and bottom of the main cavity (1); an upper cover plate (3) is connected to the upper groove (101), and a lower cover plate (4) is connected to the lower groove (102); An N-type input connector (2) and an N-type output connector (201) are respectively connected to the outer walls on both sides of the main cavity (1); A cavity (5) is arranged in the main cavity (1), and the inner walls on both sides of the cavity (5) are respectively fixedly connected with a first resonant rod (501) and a second resonant rod (502), and a plurality of the first resonant rod (501) and the second resonant rod (502) are provided, and the plurality of the first resonant rods (501) and the second resonant rods (502) are arranged in a staggered manner.

2. A high-power ultra-wideband filter according to claim 1, characterized in that: There is a first gap (503) between the first resonant rod (501) and the inner wall of the cavity (5), there is a second gap (504) between the second resonant rod (502) and the inner wall of the cavity (5), and a channel is formed between adjacent first resonant rods (501) and second resonant rods (502).

3. A high-power ultra-wideband filter according to claim 2, characterized in that: An upper fixing screw (302) is provided on the upper cover plate (3), and the upper cover plate (3) is fixedly connected in the upper groove (101) via the upper fixing screw (302).

4. A high-power ultra-wideband filter according to claim 3, characterized in that: A tuning screw (301) is threadedly connected to the upper cover plate (3), and a plurality of the tuning screws (301) are provided. One end of the plurality of tuning screws (301) placed in the cavity (5) is respectively located in the first gap (503) and the second gap (504).

5. A high-power ultra-wideband filter according to claim 3, characterized in that: The lower cover plate (4) is connected to a lower fixing screw (401), and the lower cover plate (4) is fixedly connected in the lower groove (102) via the lower fixing screw (401).

6. A high-power ultra-wideband filter according to claim 1, characterized in that: The N-type input connector (2) and the N-type output connector (201) are both provided with a fixing plate (202), the fixing plate (202) being provided with connector fixing screws (203), and the fixing plate (202) being fixedly connected to the outer wall of the main cavity (1) via the connector fixing screws (203).

7. A high-power ultra-wideband filter according to claim 6, characterized in that: The N-type input connector (2) is provided with an input connector (204), the N-type output connector (201) is provided with an output connector (205), and one end of the N-type input connector (2) and the N-type output connector (201) placed in the main cavity (1) is provided with an inner core probe (208).

8. A high-power ultra-wideband filter according to claim 7, characterized in that: The inner core probe (208) located on the N-type input connector (2) is provided with a first external thread (206), the inner core probe (208) located on the N-type output connector (201) is provided with a second external thread (207), and threaded holes (505) are provided on the first resonant rod (501) and the second resonant rod (502) located on both sides, and the first external thread (206) and the second external thread (207) are both threadedly connected to the threaded holes (505).

9. A high-power ultra-wideband filter according to claim 8, characterized in that: Circular holes (104) are provided on both side walls of the main cavity (1), and the inner core probe (208) is inserted into the circular holes (104).

10. The high-power ultra-wideband filter according to claim 1, characterized in that: A connecting hole (103) is provided on the bottom outer wall of the main cavity (1).

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