Interdigital inverting filter

Abstract

The utility model discloses an interdigital anti-phase filter, which comprises a shell, a shell cover is fixedly arranged on one side of the shell, a plurality of positioning blocks are fixedly arranged at the bottom in the shell, a mounting block is fixedly arranged at the bottom of each positioning block, a sleeve is fixedly arranged at the top of each mounting block, an inductor is sleeved in each sleeve, and the inductor is fixedly connected with the shell. A first connecting wire is arranged between every two adjacent inductors, a plurality of U-shaped clamping blocks are fixedly arranged at the inner bottom of the shell, the inductors are clamped in the U-shaped clamping blocks, the tops of the inductors are fixedly arranged at the inner top of the shell, capacitors are fixedly arranged on the side walls of the U-shaped clamping blocks, and the capacitors are fixedly arranged on the side walls of the U-shaped clamping blocks. According to the interdigital filter, the problems that the length of a resonance part of the filter is generally 1 / 4 wavelength of the center frequency of the filter, so that the size of the interdigital filter is large, and sometimes, the design requirement of small size cannot be met are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an interdigital anti-phase filter. Background Art

[0002] The interdigital filter is an interdigital cavity bandpass filter, which is widely used in communication, navigation and other systems. It is a schematic diagram of the principle of an existing interdigital filter. It mainly uses the length of the resonant component and the spacing characteristics between multiple resonant components to achieve resonant filter characteristics with different resonant components; a certain gap is set between the top end face of the resonant component of the filter and the surface of the support block.

[0003] However, the length of the filter resonant component is generally one-quarter wavelength of the filter center frequency, which makes the interdigital filter larger and sometimes cannot meet the design requirements of small volume. Therefore, the utility model proposes an interdigital anti-phase filter to solve the above problem. Utility Model Content

[0004] In view of the above defects in the prior art, the purpose of the present invention is to provide an interdigital inversion filter.

[0005] To achieve the above-mentioned purpose, the utility model provides an interdigital inverting filter, comprising a shell, a shell cover is fixedly arranged on one side of the shell, a plurality of positioning blocks are fixedly arranged on the bottom of the shell, a mounting block is fixedly arranged on the bottom of each positioning block, a sleeve is fixedly arranged on the top of the mounting block, an inductor is sleeved in the sleeve, a first connecting line is arranged between adjacent inductors, a plurality of U-shaped card blocks are fixedly arranged on the bottom of the shell, the inductor is clamped in the U-shaped card block, the top of the inductor is fixedly arranged on the top of the shell, a capacitor is fixedly arranged on the side wall of the U-shaped card block, and the capacitor is connected to the inductor through a third connecting line.

[0006] Furthermore, the shell cover is matched with the shell body, and the shell body and the side wall of the shell cover are respectively provided with four through holes, and the four through holes are provided at four corners of the shell cover.

[0007] Furthermore, a plurality of first limiting holes are respectively arranged on the circumferential side of the shell, a first positioning screw is arranged in each of the first limiting holes, and the shell cover is installed and fixed by tightening the first positioning screws.

[0008] Furthermore, a plurality of second limiting holes are provided at the bottom of the shell, a second positioning screw is provided in each of the second limiting holes, and the positioning block is installed and fixed by tightening the second positioning screw.

[0009] Furthermore, nine U-shaped blocks are provided in total, and adjacent U-shaped blocks are fixedly connected.

[0010] Furthermore, a plurality of third limiting holes are opened on the top of the shell, and a third positioning screw is arranged in each of the third limiting holes, and the inductor is installed and fixed by tightening the third positioning screw.

[0011] Furthermore, the shell cover side wall is provided with a plurality of first mounting through holes, in which a first copper core is arranged, and the shell top is provided with a plurality of second mounting through holes, in which a second copper core is arranged.

[0012] Furthermore, a plurality of third mounting through holes are provided at the bottom of the shell, a third copper core is provided in the third mounting through holes, mounting blocks are provided on both sides of the shell, and fixing screws are provided on the side walls of the mounting blocks.

[0013] Furthermore, the mounting block is fixed by the fixing screws, a connector is installed through the outer side of the mounting block, and the connector is connected to the inductor through a second connecting line.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Through the inductor, capacitor, U-shaped card block and connector structures, the filter is a radar ultra-wideband filter with a frequency band of 1830MHz to 2450MHz and a relative bandwidth of up to 64%. In a row of straight cavity distribution, a conventional magnetic coupling structure is used to obtain a conventional electric coupling effect, thereby achieving the effect of suppressing the low-end zero point. In the zero point formed by the three cavities, the middle cavity is inverted, so that the original +90° phase of the middle cavity becomes a -90° phase change, thereby achieving the effect of electromagnetic inversion. The filter has a simple structure and a small volume, which solves the problem that the length of the filter resonant component is generally one-quarter of the wavelength of the filter center frequency, making the volume of the interdigital filter larger and sometimes unable to meet the design requirements of a small volume;

[0016] 2. By setting the first positioning screw, positioning block, second positioning screw and shell cover, the shell cover is installed and fixed by tightening the first positioning screw, the positioning block is installed and fixed by tightening the second positioning screw, and the inductor is installed and fixed by tightening the third positioning screw. The entire filter structure is easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments of the utility model. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1It is a stereogram provided by the utility model;

[0019] Figure 2 It is the front view provided by the utility model;

[0020] Figure 3 It is a top view provided by the utility model;

[0021] Figure 4 It is a bottom view provided by the utility model;

[0022] Figure 5 It is a rear view provided by the utility model;

[0023] Figure 6 It is a side view provided by the utility model;

[0024] Figure 7 This is a three-dimensional diagram of the utility model without a shell cover;

[0025] Figure 8 This is the front view of the utility model without the shell cover;

[0026] Fig. 9 This is an exploded view of the utility model without a shell cover.

[0027] Description of reference numerals:

[0028] 1. Shell; 2. Shell cover; 3. First positioning screw; 4. Through hole; 5. First mounting through hole; 6. First copper core; 7. Second mounting through hole; 8. Second copper core; 9. Third limiting hole; 10. Third positioning screw; 11. Mounting block; 12. Fixing screw; 13. Connector; 14. Second limiting hole; 15. Second positioning screw; 16. Third mounting through hole; 17. Third copper core; 18. Positioning block; 19. Mounting block; 20. Sleeve; 21. U-shaped block; 22. Third connecting wire; 23. Capacitor; 24. Inductor; 25. Second connecting wire; 26. First connecting wire; 27. First limiting hole. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the protection scope of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] The terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present utility model or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order.

[0031] See also Figure 1-9 The utility model provides an interdigital inverting filter, comprising a housing 1, a housing cover 2 is fixedly arranged on one side of the housing 1, a plurality of positioning blocks 18 are fixedly arranged on the bottom of the housing 1, a mounting block 19 is fixedly arranged on the bottom of each positioning block 18, a sleeve 20 is fixedly arranged on the top of the mounting block 19, an inductor 24 is sleeved in the sleeve 20, a first connecting line 26 is arranged between adjacent inductors 24, a plurality of U-shaped card blocks 21 are fixedly arranged on the bottom of the housing 1, the inductor 24 is clamped in the U-shaped card block 21, the top of the inductor 24 is fixedly arranged on the top of the housing 1, and the side wall of the U-shaped card block 21 A capacitor 23 is fixedly arranged, and the capacitor 23 is connected to the inductor 24 through a third connecting line 22. The shell cover 2 is adapted to the shell 1. The side walls of the shell 1 and the shell cover 2 are respectively provided with through holes 4. Four through holes 4 are arranged on the shell 1 and the shell cover 2. The four through holes 4 are arranged at the four corners of the shell cover 2. A total of nine U-shaped blocks 21 are arranged, and adjacent U-shaped blocks 21 are fixedly connected. A total of two capacitors 23 are arranged. A plurality of first mounting through holes 5 are arranged on the side wall of the shell cover 2, and a first copper core 6 is arranged in the first mounting through hole 5. A plurality of second mounting through holes 7 are arranged on the top of the shell 1, and the second mounting through holes 7 are arranged on the top of the shell 1. A second copper core 8 is arranged in the hole 7, a plurality of third mounting through holes 16 are provided at the bottom of the shell 1, a third copper core 17 is arranged in the third mounting through hole 16, mounting blocks 11 are arranged on both sides of the shell 1, fixing screws 12 are arranged on the side walls of the mounting blocks 11, the mounting blocks 11 are fixed by the fixing screws 12, a connector 13 is installed through the outside of the mounting blocks 11, the connector 13 is connected to the inductor 24 through the second connecting line 25, and the filter is a radar ultra-wideband filter through the inductor 24, the capacitor 23, the U-shaped card block 21 and the connector 13 and other structures. The frequency band is: 1830 MHz~2450MHz, with a relative bandwidth of up to 64%. In a row of straight cavity distribution, a conventional magnetic coupling structure is used to obtain a conventional electric coupling effect, thereby achieving the effect of suppressing the low-end zero point. In the three-cavity zero point formation, the middle cavity is inverted, so that the original +90° phase of the middle cavity becomes a -90° phase change, thereby achieving the effect of electromagnetic inversion. The filter structure is simple and the volume is small, which solves the problem that the length of the filter resonant component is generally one-quarter of the wavelength of the filter center frequency, making the volume of the interdigital filter larger and sometimes unable to meet the design requirements of small volume;

[0032] See also Figure 1-7A plurality of first limiting holes 27 are respectively provided on the circumferential side of the shell 1, and a first positioning screw 3 is provided in each of the first limiting holes 27. The shell cover 2 is installed and fixed by tightening the first positioning screw 3. A plurality of second limiting holes 14 are provided at the bottom of the shell 1, and a second positioning screw 15 is provided in each of the second limiting holes 14. The positioning block 18 is installed and fixed by tightening the second positioning screw 15. A plurality of third limiting holes 9 are provided at the top of the shell 1, and a third positioning screw 10 is provided in each of the third limiting holes 9. The inductor 24 is installed and fixed by tightening the third positioning screw 10. Through the structures such as the first positioning screw 3, the positioning block 18, the second positioning screw 15 and the shell cover 2, the shell cover 2 is installed and fixed by tightening the first positioning screw 3, the positioning block 18 is installed and fixed by tightening the second positioning screw 15, and the inductor 24 is installed and fixed by tightening the third positioning screw 10. The entire filter structure is easy to install and disassemble.

[0033] Working principle and usage of the utility model:

[0034] When in use, the filter is a radar ultra-wideband filter with a frequency band of 1830MHz to 2450MHz and a relative bandwidth of up to 64%. It is implemented in a row of straight cavity distribution, and a conventional magnetic coupling structure is used to obtain a conventional electric coupling effect, thereby achieving the effect of suppressing the low-end zero point. In the three-cavity zero point formation, the middle cavity is inverted, so that the original +90° phase of the middle cavity becomes a -90° phase change, thereby achieving the effect of electromagnetic inversion. The filter has a simple structure and a small volume. The shell cover 2 is installed and fixed by tightening the first positioning screw 3, the positioning block 18 is installed and fixed by tightening the second positioning screw 15, and the inductor 24 is installed and fixed by tightening the third positioning screw 10. The entire filter structure is easy to install and disassemble.

[0035] The above description is only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the utility model, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.

Claims

1. An interdigital inverse phase filter, characterized in that: It includes a shell, a shell cover is fixedly provided on one side of the shell, a plurality of positioning blocks are fixedly provided on the bottom of the shell, a mounting block is fixedly provided on the bottom of each positioning block, a sleeve is fixedly provided on the top of the mounting block, an inductor is sleeved in the sleeve, a first connecting line is provided between adjacent inductors, a plurality of U-shaped card blocks are fixedly provided on the bottom of the shell, the inductor is clamped in the U-shaped card blocks, the top of the inductor is fixedly provided on the top of the shell, a capacitor is fixedly provided on the side wall of the U-shaped card block, and the capacitor is connected to the inductor through a third connecting line.

2. The interdigital anti-phase filter according to claim 1, characterized in that: The shell cover is matched with the shell body, and the shell body and the side wall of the shell cover are respectively provided with four through holes, and the four through holes are provided at four corners of the shell cover.

3. The interdigital inverse phase filter according to claim 2, characterized in that: A plurality of first limiting holes are respectively arranged on the circumferential side of the shell, a first positioning screw is arranged in each of the first limiting holes, and the shell cover is installed and fixed by tightening the first positioning screws.

4. The interdigital anti-phase filter according to claim 3, characterized in that: A plurality of second limiting holes are formed at the bottom of the housing, and a second positioning screw is disposed in each of the second limiting holes. The positioning block is installed and fixed by tightening the second positioning screw.

5. The interdigital anti-phase filter according to claim 4, characterized in that: A total of nine U-shaped card blocks are provided, and adjacent U-shaped card blocks are fixedly connected.

6. The interdigital inversion filter according to claim 5, characterized in that: A plurality of third limiting holes are formed on the top of the shell, and a third positioning screw is disposed in each of the third limiting holes. The inductor is installed and fixed by tightening the third positioning screw.

7. The interdigital inversion filter according to claim 6, characterized in that: The shell cover side wall is provided with a plurality of first mounting through holes, in which a first copper core is arranged, and the shell top is provided with a plurality of second mounting through holes, in which a second copper core is arranged.

8. The interdigital inversion filter according to claim 7, characterized in that: A plurality of third mounting through holes are provided at the bottom of the shell, a third copper core is provided in the third mounting through holes, mounting blocks are provided on both sides of the shell, and fixing screws are provided on the side walls of the mounting blocks.

9. The interdigital inversion filter according to claim 8, characterized in that: The mounting block is fixed by the fixing screws, a connector is installed through the outer side of the mounting block, and the connector is connected to the inductor through a second connecting line.

Images