CN220935147U

CN220935147U - Laminated low-pass filter

Info

Publication number: CN220935147U
Application number: CN202322871385.6U
Authority: CN
Inventors: 张琳; 李月婵; 管雨佩; 黄盼盼
Original assignee: Hefei Fangyuan Microwave Co ltd
Current assignee: Hefei Fangyuan Microwave Co ltd
Priority date: 2023-10-25
Filing date: 2023-10-25
Publication date: 2024-05-10
Anticipated expiration: 2033-10-25

Abstract

The utility model relates to a laminated sheet type low-pass filter, which comprises a device cover body and a device shell, wherein a shell inner cavity is formed in the top of the device shell, second sleeves are arranged at the centers of two sides of the shell inner cavity, second guide holes are formed in the second sleeves, second guide columns are arranged in the second guide holes, the second guide columns are connected with a support plate, through holes are formed in the center of the top of the support plate, electric fans are fixedly connected to the surfaces of the through holes, first sleeves are arranged at four corners of the shell inner cavity, first guide holes are formed in the first sleeves, first guide columns are arranged in the first guide holes, the other ends of the first guide columns are connected with the device cover body, support plates are connected to the shell inner cavity in a guide column mode, fans are arranged in the center of the support plates, and can be started in the process of increasing the temperature in the shell, and then heat dissipation performance is improved by accelerating the air circulation rate in the shell.

Description

Laminated low-pass filter

Technical Field

The utility model relates to the technical field of filters, in particular to a laminated low-pass filter.

Background

The filter is a filter circuit composed of a capacitor, an inductor and a resistor. The filter can effectively filter the frequency points of the specific frequency or the frequencies outside the frequency points in the power line to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency.

Whereas a low pass filter is an electronic filter device that allows signals below the cut-off frequency to pass but not above the cut-off frequency.

With the development of communication technology, a laminated type radio frequency low-pass filter is produced, and the laminated type ceramic radio frequency (microwave) filter is a high-frequency filter manufactured by various technological processes such as an electronic ceramic material tape casting forming process, a high-precision printing lamination technology, a low-temperature sintering technology and the like. The microwave antenna has the characteristics of small volume, low insertion loss and the like, is widely applied to systems such as microwave communication, radar navigation, electronic countermeasure, satellite communication, VHF/UHF transmitters/receivers, harmonic suppressors, digital-to-analog converters, test instruments and the like, is an indispensable important device in a microwave system, and the performance of the microwave antenna is always directly influenced by the performance index of the whole communication system.

Chinese authorized utility model disclosure (bulletin) number: CN209805777U is a lamination formula ceramic radio frequency low pass filter, which comprises a top plate, the fastening screw, rectangular housing, the stand, the input is anodal, the output is anodal, first public earth connection, the public earth connection of second, air switch, remove the handle, the inductance, medium, electric capacity and fagging, this be used for lamination formula ceramic radio frequency low pass filter reasonable in design, the inductance is provided with the multiunit and all is the equidistance setting, and vertical welding has ceramic division board between every inductance, and the chucking of inductance through the mode chucking of joint sets up between ceramic division board.

However, the above laminated rf low-pass filter in the prior art does not consider heat dissipation, and generates a lot of heat during the use of the laminated rf low-pass filter, and the heat needs to be dissipated.

Disclosure of utility model

The present utility model is directed to a laminated low-pass filter to solve the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a lamination formula low pass filter, includes device lid, device casing, the casing inner chamber has been seted up at the top of device casing, the both sides center of casing inner chamber is provided with the second sleeve, the second guiding hole has been seted up to the inside of second sleeve, the inside of second guiding hole is provided with the second guide post, the second guide post is connected with the backup pad, the through-hole has been seted up at the top center of backup pad, through-hole surface fixedly connected with electric fan, four angles department of casing inner chamber is provided with first sleeve, first guiding hole has been seted up to the inside of first sleeve, the inside of first guiding hole is provided with first guide post, the other end of first guide post is connected with the device lid;

The ceramic capacitor is characterized in that a ceramic guide plate is arranged at the bottom of the middle of the inner cavity of the shell, a capacitor substrate is arranged at the top of the ceramic guide plate, another ceramic guide plate is arranged at the top of the capacitor substrate, the capacitor substrate and the another ceramic guide plate are connected through a ceramic point column, and an inductance substrate is arranged at the top of the another ceramic guide plate.

Preferably, the bottoms of the first sleeve and the second sleeve are connected with the bottom of the inner cavity of the shell, the height of the first sleeve is matched with the height of the inner cavity of the shell, and the height of the second sleeve is smaller than the height of the inner cavity of the shell.

Preferably, the inner side surface of the second sleeve is provided with a first notch, the height of the first notch is matched with the height of the supporting plate, and the top of the first notch is positioned at the top of the second sleeve.

Preferably, second notches are formed in four corners of the supporting plate, and the diameters of the second notches are matched with those of the first sleeve.

Preferably, the device cover and the device housing are made of ceramic materials.

Compared with the prior art, the utility model has the beneficial effects that:

The utility model relates to a laminated sheet type low-pass filter which mainly comprises a device cover body and a device shell, wherein a supporting plate is connected to the inner cavity of the shell in a guide column mode, a fan is arranged at the center of the supporting plate, the fan is started in the process of increasing the temperature in the shell, and the heat dissipation performance is further improved by accelerating the air circulation rate in the shell, wherein the device cover body and the device shell are both made of ceramic materials, and the ceramic is in a micro-hole structure, so that the heat dissipation area contacted with air is greatly increased, and the heat dissipation effect is greatly enhanced.

The capacitors and the inductors of the internal low-pass filter of the laminated low-pass filter are arranged in a plurality of groups and are all equidistantly arranged, the capacitors and the inductors are designed on the ceramic guide plates, and each layer is connected through the connecting ceramic point columns, so that the design of the low-pass filter is developed towards the miniaturization direction.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a device housing according to the present utility model;

FIG. 3 is an exploded view of the present utility model;

Fig. 4 is a schematic view of the internal structure of the present utility model.

In the figure: 1. a device cover; 2. a device housing; 3. a housing interior; 4. a first sleeve; 5. a first guide hole; 6. a second sleeve; 7. a second guide hole; 8. a first notch; 9. a first guide post; 10. a support plate; 11. a second notch; 12. a through hole; 13. an electric fan; 14. a second guide post; 15. connecting ceramic point columns; 16. ceramic guide plates; 17. a capacitive substrate; 18. an inductive substrate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a lamination formula low pass filter, including device lid 1, device casing 2, device casing 3 has been seted up at the top of device casing 2, the both sides center of casing 3 is provided with second sleeve 6, second guiding hole 7 has been seted up to the inside of second sleeve 6, the inside of second guiding hole 7 is provided with second guide post 14, second guide post 14 is connected with backup pad 10, through-hole 12 has been seted up at the top center of backup pad 10, through-hole 12 surface fixedly connected with electric fan 13, four angles department of casing inner chamber 3 is provided with first sleeve 4, first guiding hole 5 has been seted up to the inside of first sleeve 4, the inside of first guiding hole 5 is provided with first guide post 9, the other end of first guide post 9 is connected with device lid 1;

The middle bottom of the inner cavity 3 of the shell is provided with a ceramic guide plate 16, the top of the ceramic guide plate 16 is provided with a capacitor substrate 17, the top of the capacitor substrate 17 is provided with another ceramic guide plate 16, the capacitor substrate 17 and the another ceramic guide plate 16 are connected through a ceramic point column 15, and the top of the another ceramic guide plate 16 is provided with an inductor substrate 18.

Further, various electronic components of the filter are provided in the housing cavity 3, and are connected by a laminated type.

Further, the bottoms of the first sleeve 4 and the second sleeve 6 are connected with the bottom of the inner cavity 3 of the shell, the height of the first sleeve 4 is matched with the height of the inner cavity 3 of the shell, and the height of the second sleeve 6 is smaller than the height of the inner cavity 3 of the shell.

Specifically, in order to facilitate the maintenance of the electronic components in the housing cavity 3, the support plate 10 needs to be removed easily, wherein the height of the second guide post 14 is matched with the height of the housing cavity 3, when the second guide post 14 is inserted into the second guide hole 7, the second guide post 14 will extend out of the second sleeve 6, and the maintenance personnel holds the second guide post 14 with two hands, so that the support plate 10 is pulled out by the staff conveniently.

After the overhaul is completed, the device cover body 1 needs to be installed, an overhaul worker inserts the first guide post 9 of the device cover body 1 into the first guide hole 5, and then the device cover body can be installed, wherein the height of the first guide post 9 is matched with the height of the first guide hole 5, so that the device cover body can be better installed and fixed.

Further, the inner side surface of the second sleeve 6 is provided with a first notch 8, the height of the first notch 8 is matched with the height of the supporting plate 10, and the top of the first notch 8 is located at the top of the second sleeve 6.

Further, the four corners of the supporting plate 10 are provided with second notches 11, and the diameters of the second notches 11 are matched with those of the first sleeve 4.

Further, the device cover body 1 and the device shell body 2 are made of ceramic, and the structure of micro holes of the ceramic greatly increases the heat dissipation area contacted with air, and greatly enhances the heat dissipation effect.

Specifically, when the second guide post 14 at the support plate 10 is inserted into the second guide hole 7, the bottom of the support plate 10 will contact the bottom of the first notch 8 when the bottom of the second guide post 14 is connected to the bottom of the housing cavity 3.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. The utility model provides a lamination formula low pass filter, includes device lid (1), device casing (2), its characterized in that: the device comprises a device body and is characterized in that a body inner cavity (3) is formed in the top of the device body (2), second sleeves (6) are arranged in the centers of two sides of the body inner cavity (3), second guide holes (7) are formed in the second sleeves (6), second guide columns (14) are arranged in the second guide holes (7), the second guide columns (14) are connected with a supporting plate (10), through holes (12) are formed in the centers of the tops of the supporting plate (10), electric fans (13) are fixedly connected to the surfaces of the through holes (12), first sleeves (4) are arranged at four corners of the body inner cavity (3), first guide holes (5) are formed in the first sleeves (4), first guide columns (9) are arranged in the first guide holes (5), and the other ends of the first guide columns (9) are connected with a device cover body (1);

The ceramic capacitor is characterized in that a ceramic guide piece (16) is arranged at the bottom of the middle of the inner cavity (3) of the shell, a capacitor substrate (17) is arranged at the top of the ceramic guide piece (16), another ceramic guide piece (16) is arranged at the top of the capacitor substrate (17), the capacitor substrate (17) and the another ceramic guide piece (16) are connected through a ceramic point column (15), and an inductance substrate (18) is arranged at the top of the another ceramic guide piece (16).

2. A laminated low pass filter according to claim 1, wherein: the bottoms of the first sleeve (4) and the second sleeve (6) are connected with the bottom of the inner cavity (3) of the shell, the height of the first sleeve (4) is matched with the height of the inner cavity (3) of the shell, and the height of the second sleeve (6) is smaller than the height of the inner cavity (3) of the shell.

3. A laminated low pass filter according to claim 1, wherein: the inner side surface of the second sleeve (6) is provided with a first notch (8), the height of the first notch (8) is matched with the height of the supporting plate (10), and the top of the first notch (8) is positioned at the top of the second sleeve (6).

4. A laminated low pass filter according to claim 1, wherein: the four corners of the supporting plate (10) are provided with second notches (11), and the diameters of the second notches (11) are matched with those of the first sleeve (4).

5. A laminated low pass filter according to claim 1, wherein: the device cover body (1) and the device shell body (2) are made of ceramic materials.