CN216818585U - Miniaturized ultra-wideband harmonic suppression filter - Google Patents

Abstract

The embodiment of the utility model provides a miniaturized ultra-wideband harmonic suppression filter, which relates to the technical field of communication and comprises the following components: a shield case for blocking an external signal; the resonance component is arranged in the shielding box and comprises a resonance column and a resonance disc, the resonance disc is connected with one end of the resonance column, the resonance disc extends along the direction of the resonance column and is close to the other end of the resonance column, and therefore the frequency is reduced under the condition that the volume of the filter is not increased by utilizing redundant space around the resonance column.

Description

Miniaturized ultra-wideband harmonic suppression filter

Technical Field

The utility model relates to the technical field of communication, in particular to a miniaturized ultra-wideband harmonic suppression filter.

Background

The cavity filter has the advantages of high suppression, low insertion loss and the like, is widely applied to systems such as communication, radar navigation, electronic countermeasure, satellite communication, missile guidance, test instruments and the like, is an indispensable important device in radio frequency/microwave and millimeter wave systems, and the performance of the cavity filter is often directly influenced by the performance index of the whole communication system. The electromagnetic environment in modern advanced wireless systems is more and more complex, the functions and requirements of the systems are explosively increased, available spectrum resources are more and more strained, and better suppression between adjacent frequency bands is required, so that the requirements on various performance indexes of the filter are higher and higher.

In the related art, the resonant disks of the cavity filter are usually circular, and the frequency can be reduced only by increasing the area of the circular resonant disks, because the resonant disks in the related art are all arranged on the same plane, increasing the area of the resonant disks can increase the area of the plane where the resonant disks are located, and further inevitably leads to the increase of the volume of the cavity filter, which is not in line with the development trend of filter miniaturization and also increases the manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a miniaturized ultra-wideband harmonic suppression filter, which can solve the problem that the volume of a cavity filter is increased due to the fact that the frequency is reduced by increasing the area of a circular resonant disc in the related art.

The embodiment of the utility model provides a miniaturized ultra-wideband harmonic suppression filter, which comprises:

a shield case for blocking an external signal;

the resonance component is arranged in the shielding box and comprises a resonance column and a resonance disc, the resonance disc is connected with one end of the resonance column, and the resonance disc extends along the direction of the resonance column and is close to the other end of the resonance column.

The miniaturized ultra-wideband harmonic suppression filter provided by the embodiment of the utility model at least has the following beneficial effects:

the resonance component of the miniaturized ultra-wideband harmonic suppression filter comprises the resonance column and the resonance disc, wherein the resonance disc is connected with one end of the resonance column, extends along the direction of the resonance column and is close to the other end of the resonance disc, so that the surface area of the resonance disc is expanded by using redundant space around the resonance column, and the area of the resonance component does not change greatly from the overlooking perspective, thereby avoiding the situation that the volume of the filter is increased due to the expansion of the resonance disc, and realizing the reduction of the frequency without increasing the volume of the filter.

Optionally, in an embodiment of the present invention, the resonant disk has two extending portions extending along a direction in which the resonant pillar is located and approaching the other end of the resonant pillar, the two extending portions are opposite to each other, and areas of the two extending portions are equal. The two extending parts are opposite to each other and extend along the direction of the resonant column to be close to the other end of the resonant column, and the redundant space around the resonant column is more fully utilized to reduce the frequency.

Optionally, in an embodiment of the present invention, the resonant column is a hollow structure, the resonant disk is provided with a through hole at a connection point with the resonant column, the resonant assembly further includes a dielectric column, the dielectric column penetrates through the through hole of the resonant disk, and the dielectric column is partially located inside the resonant column. The dielectric post portion is located inside the resonant post such that the frequency of the resonant assembly becomes controllable.

Optionally, in an embodiment of the present invention, the shielding box further includes a tuning assembly, the number of the tuning assembly in the shielding box is the same as that of the tuning assembly in the shielding box, the tuning assembly is movably connected to the tuning assembly, the dielectric column is of a hollow structure, and the tuning assembly is directly opposite to the opening of the dielectric column. The frequency of the resonant assembly may be adjusted by adjusting the position of the tuning assembly.

Optionally, in an embodiment of the present invention, an outer sidewall of the dielectric pillar is attached to an inner sidewall of the resonant pillar. The lateral wall of medium post and the laminating of the inside wall of resonance post can be solved under the condition of high power, the problem of striking sparks of tuning unit and resonance assembly.

Optionally, in an embodiment of the present invention, the tuning assembly includes a tuning screw and a fixing nut, the tuning screw is movably connected to the connecting hole and is partially located inside the dielectric column, the fixing nut is disposed on the tuning screw and is located outside the shielding box, and the fixing nut is configured to fix a position of the tuning screw. The tuning screw rod is movably connected with the connecting hole, so that the position of the tuning screw rod in the medium column can be adjusted to adjust the frequency, the fixing nut is arranged on the tuning screw rod, the fixing nut is adjusted to the connecting hole, and the position of the tuning screw rod in the medium column can be fixed to fix the frequency.

Optionally, in an embodiment of the present invention, there are a plurality of the resonant assemblies, and the number of the tuning assemblies is the same as the number of the resonant assemblies. The plurality of resonant assemblies can better filter unwanted signals, one for each tuning assembly, thereby enabling independent control of the frequency of each resonant assembly.

Optionally, in an embodiment of the present invention, each of the resonant assemblies is linearly arranged in the shielding box, and in each pair of adjacent two of the resonant assemblies, a position of one of the resonant assemblies is inverted from a position of the other resonant assembly, so that all the resonant assemblies are staggered from each other. In each pair of two adjacent resonance assemblies, the position of one resonance assembly and the position of the other resonance assembly are reversed up and down, so that all the resonance assemblies are arranged in a staggered mode up and down, the coupling bandwidth can be changed by adjusting the distance between the resonance columns under the condition of not adjusting frequency-variable coupling in an alternative staggered connection mode between the resonance columns, an ultra-wide inhibition band is realized, and meanwhile, spaces are reserved for two sides of the tuning assemblies, so that all the tuning assemblies are not stacked on the same plane any more, but are arranged in a staggered mode up and down, the size of the filter is reduced, and the tuning assemblies can be operated conveniently.

Optionally, in an embodiment of the present invention, the resonant columns of the resonant assemblies are cascaded through a connecting line. The resonance columns of the resonance assembly are cascaded through the connecting line, so that frequency-dependent coupling can be reduced, and the coupling bandwidth is changed.

Optionally, in an embodiment of the present invention, the shielding box further includes a signal input unit and a signal output unit, the signal input unit and the signal output unit are both disposed outside the shielding box, the signal input unit is connected to the resonant assembly at one end of each of the linearly connected resonant assemblies, and the signal output unit is connected to the resonant assembly at the other end of each of the linearly connected resonant assemblies. After the signal input part inputs the signal, the useless signal is filtered by the multi-stage resonance assembly, and finally the multi-stage filtered signal can be output from the signal output part.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the example serve to explain the principles of the utility model and not to limit the utility model.

FIG. 1 is a schematic diagram of a miniaturized ultra-wideband harmonic rejection filter according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the resonant components of a filter of an embodiment of the present invention;

FIG. 3 is a schematic view of a resonating column and a resonating disk of a resonating assembly of an embodiment of the present invention;

FIG. 4 is an internal schematic view of a dielectric post of a resonant assembly of an embodiment of the present invention;

FIG. 5 is a schematic view of a tuning screw of the tuning assembly of an embodiment of the present invention;

reference numerals: a miniaturized ultra-wideband harmonic rejection filter 100; a shield case 101; a resonant assembly 102; a resonant column 103; a resonant disk 104; a dielectric column 105; a tuning component 106; a tuning screw 107; a fixing nut 108; a signal input section 109; a signal output section 110.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explanation and should not be construed as limiting the utility model.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the related art, the resonant disks 104 of the cavity filter are generally circular, and the frequency can be reduced only by increasing the area of the circular resonant disks 104, and the resonant disks in the related art are all disposed on the same plane, and increasing the area of the resonant disks 104 increases the area of the plane where the resonant disks 104 are located, which inevitably leads to an increase in the volume of the cavity filter, which neither meets the development trend of miniaturization of the filter, nor increases the manufacturing cost.

Accordingly, the embodiment of the present invention provides a miniaturized ultra-wideband harmonic suppression filter 100, which can reduce the frequency without increasing the volume of the filter by extending the structure of the resonant disk 104 toward the resonant post 103 and approaching the other end of the resonant post 103, thereby utilizing the extra space around the resonant post 103 to enlarge the area of the resonant disk 104.

The following disclosure provides many different embodiments, or examples, for implementing different aspects of the utility model.

Referring to fig. 1 and 2, the miniaturized ultra-wideband harmonic suppression filter 100 of the present invention includes a shielding box 101, the shielding box 101 is used for blocking external signals, a cavity environment suitable for filtering can be formed inside the shielding box 101, and interference of the external signals to the filtering process is prevented, furthermore, important components of the miniaturized ultra-wideband harmonic suppression filter 100 of the present invention include a resonance component 102, the resonance component 102 includes a resonance column 103 and a resonance disk 104, wherein the resonance disk 104 is connected with one end of the resonance column 103, and the resonance disk 104 extends along the direction of the resonance column 103 and tends to gradually approach the other end of the resonance column 103.

For example, in some embodiments of the present invention, referring to fig. 1, 2 and 3, the resonant assembly 102 includes a resonant post 103 and a resonant disk 104, the shielding box 101 forms a cavity environment for filtering, and 4 resonant assemblies 102 can be included inside the shielding box 101, wherein the resonant post 103 of the resonant assembly 102 is connected to one side of the shielding box 101 to fix the position of the resonant assembly 102 inside the filter, and in the resonant assembly 102, the resonant disk 104 is connected to one end of the resonant post 103, it is noted that the resonant disk 104 does not exist in only one plane, and the resonant disk 104 has two portions extending in the direction of the resonant post 103 (i.e., extending parallel to the resonant post 103), and the extending direction is the other end near the connecting end of the resonant disk 104 to the resonant post 103, so that the resonant disk 104 can expand the surface area of the resonant disk 104 in a manner extending to excess space around the resonant post 103, thereby achieving a reduction in the frequency of the filter without enlarging the planar footprint of the resonant assembly 102 and without increasing the filter volume.

It should be noted that only one portion of the resonant disk 104 may extend in the direction of the resonant post 103 to the other end near the connection end of the resonant disk 104 and the resonant post 103, as long as the surface area of the resonant disk 104 can be expanded by extending the extra space around the resonant post 103 to reduce the frequency of the filter without enlarging the planar footprint of the resonant assembly 102.

In addition, it is understood that in the above embodiments, the resonant column 103 may be connected to the shielding box 101 by using an adhesive or welding, as long as the position of the resonant assembly 102 on the shielding box 101 can be fixed, and details are not described herein; in the above embodiment, the interior of the shielding box 101 may further include 5, 6, 7 or even more resonant assemblies 102, and the specific situation may be determined in consideration of the requirements on the filtering precision, the size of the filter and the like of the filter in practice, and will not be described herein again; the shape of the resonant disk 104 may be rectangular, and then the rectangular portion is bent to form an extended structure of the resonant disk 104 according to the embodiment of the present invention, or may be oval, and so on, which is not described herein in detail.

In the above-described embodiment, the resonant disk 104 may have two extending portions extending in the direction of the resonant post 103 and near the other end of the resonant post 103, the two extending portions facing each other and the areas of the two extending portions being equal.

For example, as shown in fig. 2 and 3, the resonant disk 104 has a portion connected to one end of the resonant column 103, and the resonant disk 104 extends toward the other end of the resonant column 103 along the direction of the resonant column 103 on both sides of the joint connecting the resonant disk 104 and the resonant column 103 and forms two extending portions, or it can be understood that the resonant disk 104 is bent to form two bent portions (i.e., extending portions) on both sides of the joint connecting the resonant disk 104 and the resonant column 103, and the areas of the two extending portions are equal, and the two extending portions of the resonant disk 104 fully utilize the excess space on both sides of the resonant column 103, so as to greatly increase the surface area of the resonant disk 104 and reduce the frequency, and also avoid the expansion of the occupied area of the resonant component 102, so that the size of the resonant component 102 is not affected by the expansion of the surface area of the resonant disk 104.

In some embodiments, the resonant post 103 may be a hollow structure, the resonant disk 104 is provided with a through hole at the connection with the resonant post 103, the resonant assembly 102 further comprises a dielectric post 105, the dielectric post 105 may pass through the through hole of the resonant disk 104 and a portion of the dielectric post 105 is located inside the resonant post 103.

Specifically, referring to fig. 2, 3 and 4, the resonant column 103 is a hollow column structure, the resonant disk 104 is provided with a through hole corresponding to the hollow of the resonant column 103 at the joint of the resonant disk 104 and the resonant column 103, the resonant assembly 102 may further include a dielectric column 105, and the dielectric column 105 may pass through the through hole on the resonant disk 104 to enter the interior of the resonant column 103 of the hollow column structure, so that the frequency of the resonant assembly 102 becomes controllable.

In some embodiments, the filter of the present invention may further include a tuning assembly 106, the shielding box 101 is provided with a number of connection holes equal to the number of the tuning assembly 106, the tuning assembly 106 is movably connected to the connection holes, the dielectric post 105 is of a hollow structure, the connection holes are opposite to the opening of the dielectric post 105, and since the tuning assembly 106 is movably connected to the connection holes and the connection holes are opposite to the opening of the dielectric post 105, the position of the tuning assembly 106 may be adjusted, so as to adjust the frequency of the resonant assembly 102.

For example, referring to fig. 1, 2 and 4, the filter of the present invention includes 4 tuning assemblies 106, and the 4 tuning assemblies 106 can be inserted through the connection holes on the shielding box 101 on the side wall of the shielding box 101, and at the same time, the dielectric column 105 is of a hollow structure, and part of the dielectric column 105 enters the interior of the resonant column 103 of the resonant assembly 102, which means that the frequency of the resonant assembly 102 can be adjusted by interference, since the connection holes on the shielding box 101 are opposite to the opening of the dielectric column 105 of the hollow structure, and the resonant assembly 102 is movably connected with the connection holes, the frequency of the resonant assembly 102 can be adjusted by adjusting the position of the tuning assemblies 106.

In the above embodiment, the outer sidewall of the dielectric column 105 may also be attached to the inner sidewall of the resonant column 103, and the distance between the outer sidewall of the dielectric column 105 and the inner sidewall of the resonant column 103 is very small due to the attached structure, so that the problem of sparking between the tuning assembly 106 and the resonant assembly 102 in the case of high power can be solved.

In some embodiments, the tuning assembly 106 may further include a tuning screw 107 and a fixing nut 108, the tuning screw 107 is movably connected with the connecting hole and partially located inside the dielectric column 105, the fixing nut 108 is disposed on the tuning screw 107 and located outside the shielding box 101, and the fixing nut 108 is used for fixing the position of the tuning screw 107.

Specifically, as shown in fig. 1 and fig. 5, the tuning assembly 106 may be composed of a tuning screw 107 and a fixing nut 108, wherein the tuning screw 107 is movably connected to the connection hole, for example, the connection hole may have a thread, the threaded portion of the tuning screw 107 is movably connected to the connection hole, the tuning screw 107 may be moved up and down by rotating the tuning screw 107, the tuning screw 107 may be partially located inside the dielectric column 105, so as to influence the frequency of the resonant assembly 102, and the fixing nut 108 is further provided on the tuning screw 107, it is understood that the fixing nut 108 may be provided on the threaded portion of the tuning screw 107, the fixing nut 108 may be provided outside the shielding box 101, so as to facilitate the operation, the fixing nut 108 causes a pressure with the shielding box 101 by rotating the fixing nut 108, thereby clamping the tuning screw 107, the position of the tuning screw 107 is fixed to fix the frequency of the resonant assembly 102.

In the above embodiments, there may also be a plurality of resonant assemblies 102, and the number of tuning assemblies 106 is the same as the number of resonant assemblies 102. The plurality of resonant assemblies 102 can better filter unwanted signals, one tuning assembly 106 for each tuning assembly 106, thereby allowing independent control of the frequency of each resonant assembly 102.

For example, as shown in fig. 1, the shielding box 101 includes 4 resonant assemblies 102, and the number of the tuning assemblies 106 is 4 as much as the number of the resonant assemblies 102, so that a better filtering effect can be achieved by 4 stages of resonant assemblies 102, and the frequencies of the resonant assemblies 102 can be controlled by independently adjusting the tuning assemblies 106 corresponding to the 4 resonant assemblies 102 to adapt to different filtering requirements.

In the above embodiment, the respective resonant assemblies 102 are linearly arranged inside the shield case 101, and in each pair of adjacent two resonant assemblies 102, the position of one resonant assembly 102 is inverted from the position of the other resonant assembly 102, so that all the resonant assemblies 102 are staggered up and down.

Specifically, as shown in fig. 1, the filter includes 4 resonant assemblies 102, wherein the position of each pair of adjacent resonant assemblies 102 is inverted, for example, the first resonant assembly 102, the first tuning assembly 106, the second resonant assembly 102, and the second tuning assembly 106 (counting from left to right) in fig. 1, the position of the contact between the first resonant assembly 102 and the first tuning assembly 106 is located at an upper position, the position of the contact between the second resonant assembly 102 and the second tuning assembly 106 is located at a lower position, and so on, so that the position of each pair of adjacent resonant assemblies 102 is inverted, the respective resonant assemblies 102 are staggered up and down and staggered alternately, the arrangement manner of the staggered up and down and staggered arrangement can change the coupling bandwidth by adjusting the spacing between the resonant columns 103 without adjusting the frequency-variable coupling, thereby realizing the ultra-wide rejection band, meanwhile, as shown in fig. 1, by the up-down staggered arrangement, there is a certain space on both sides of each tuning assembly 106, so that all tuning assemblies 106 are not stacked on the same plane any more, the volume of the filter is not affected by the size of the tuning assembly 106 to a certain extent, and meanwhile, the tuning assemblies 106 can be operated more conveniently by the spaces on both sides of the tuning assemblies 106.

In addition, it is understood that the linear arrangement refers to that only a linear logical arrangement connection relationship exists between the resonant assemblies 102, and is not limited to only an arrangement on a straight line, and may be any linear arrangement relationship, for example, the arrangement manner of the resonant assemblies 102 may be an arrangement manner on a straight line as shown in fig. 1, so that the shape of the filter is an elongated shape as shown in fig. 1, or may be arranged on a line segment that is wound into a square in a top plan view, so that the filter is a square shape in a top plan view, and details thereof are not repeated here.

In the above embodiment, the resonant columns 103 of the respective resonant assemblies 102 may be cascaded by a connecting line, and the resonant columns 103 of the resonant assemblies 102 may be cascaded by a connecting line, so that the frequency-dependent coupling may be reduced, and the coupling bandwidth may be changed.

In addition, it can be understood that the resonant columns 103 are cascaded through connecting lines, so that the linear logical arrangement and connection relationship existing between the resonant assemblies 102 mentioned in the above embodiments can be realized, multi-stage filtering is realized, and the connecting lines can be used for reducing frequency-dependent coupling and changing the coupling bandwidth.

In some embodiments of the present invention, the filter may further include a signal input part 109 and a signal output part 110, the signal input part 109 and the signal output part 110 are both disposed outside the shield case 101, the signal input part 109 is connected to the resonant assembly 102 at one end of the linearly connected respective resonant assemblies 102, and the signal output part 110 is connected to the resonant assembly 102 at the other end of the linearly connected respective resonant assemblies 102.

For example, as shown in fig. 1, four resonant assemblies 102 are disposed in the shielding box 101, because the resonant assemblies 102 may be arranged in a straight line, so that the filter has a long shape, the signal input part 109 and the signal output part 110 are disposed at two ends of the filter, respectively, it can be understood that the signal input part 109 may be connected to the first resonant assembly 102 from left to right through a metal conductor, and the signal output part 110 may be connected to the fourth resonant assembly 102 from left to right through a metal conductor, so that after a signal is input into the signal input part 109, an unwanted signal is filtered by the fourth resonant assembly 102, and finally a signal after four-stage filtering may be output from the signal output part 110.

In addition, it can be understood that the interior of the shielding box 101 may further include 5, 6, 7, and the like resonant assemblies 102, and the specific situation may be determined in consideration of the requirements on the filtering precision, the size, and the like of the filter in practice, and details are not described herein.

Claims (10)

1. A miniaturized ultra-wideband harmonic rejection filter, comprising:

a shield case for blocking an external signal;

the resonance component is arranged in the shielding box and comprises a resonance column and a resonance disc, the resonance disc is connected with one end of the resonance column, and the resonance disc extends along the direction of the resonance column and is close to the other end of the resonance column.

2. The miniaturized ultra-wideband harmonic suppression filter according to claim 1, wherein the resonant disk has two extending portions extending in a direction of the resonant post and near the other end of the resonant post, the two extending portions are opposite to each other and have equal areas.

3. The miniaturized ultra-wideband harmonic suppression filter according to claim 1, wherein the resonant post is a hollow structure, the resonant disk is provided with a through hole at a connection with the resonant post, the resonant assembly further comprises a dielectric post, the dielectric post passes through the through hole of the resonant disk, and the dielectric post is partially located inside the resonant post.

4. The miniaturized ultra-wideband harmonic suppression filter according to claim 3, further comprising a tuning assembly, wherein the number of the tuning assembly connecting holes is the same as that of the tuning assembly connecting holes on the shielding box, the tuning assembly is movably connected with the connecting holes, the dielectric column is of a hollow structure, and the connecting holes are opposite to the opening of the dielectric column.

5. The miniaturized ultra-wideband harmonic suppression filter according to claim 4, wherein outer sidewalls of the dielectric posts are attached to inner sidewalls of the resonant posts.

6. The miniaturized ultra-wideband harmonic suppression filter according to claim 4, wherein the tuning assembly comprises a tuning screw movably connected with the connection hole and partially located inside the dielectric column, and a fixing nut disposed on the tuning screw and located outside the shielding box, the fixing nut being used for fixing the position of the tuning screw.

7. The miniaturized ultra-wideband harmonic rejection filter of claim 4, wherein there are a plurality of said resonant components, and wherein the number of said tuning components is the same as the number of said resonant components.

8. The miniaturized ultra-wideband harmonic suppression filter according to claim 7, wherein each of said resonating assemblies is linearly arranged within said shielding box with the position of one of said resonating assemblies being upside-down from the position of the other of said resonating assemblies in each pair of adjacent two of said resonating assemblies such that all of said resonating assemblies are staggered up and down.

9. The miniaturized ultra-wideband harmonic suppression filter according to claim 7, wherein the resonant columns of each resonant assembly are cascaded by a connecting wire.

10. The miniaturized ultra-wideband harmonic suppression filter according to claim 9, further comprising a signal input section and a signal output section, both of which are disposed outside the shield case, the signal input section being connected to the resonant assembly at one end of each of the resonant assemblies that are linearly connected, and the signal output section being connected to the resonant assembly at the other end of each of the resonant assemblies that are linearly connected.

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