KR102652627B1 - Cavity filter assembly - Google Patents

Abstract

The present invention relates to a cavity filter assembly. In particular, the present invention relates to a filter body having a cavity with a predetermined space inside, and a filter body whose front end surface is parallel to the bottom surface of the filter body of the cavity for frequency tuning within the cavity. It includes at least one resonance bar that forms a steering angle portion, which is a protruding surface protruding from the bottom toward the cavity, and has a tuning correction hole penetrating the steering angle portion, wherein the resonance bar is located on the outside of the filter body and is formed in the steering angle portion. Frequency tuning within the cavity is performed through a striking angle on the outer surface, and the tuned frequency can be modified through the tuning correction hole, thereby reducing the overall weight and component cost of the antenna device and improving product productivity. It provides advantages.

Description

Cavity filter assembly {CAVITY FILTER ASSEMBLY}

The present invention relates to a cavity filter assembly, and more specifically, to a cavity filter assembly that can reduce the overall weight of an antenna device and reduce costs.

Generally, an antenna device includes a main board on which power supply elements and a number of RF filters are mounted, a plurality of antenna elements that serve as radiating elements are mounted on the front, and a main board is spaced apart from the main board. It includes an antenna board that is stacked and arranged at the front end of the RF filter.

1 is an exploded perspective view showing a cavity filter assembly according to the prior art and a cross-sectional view taken along line A-A in an assembled state.

There are many different types of RF filters, but in particular, cavity filters are the most commonly used type of RF filter these days due to their ease of frequency tuning and assembly on the main board.

As shown in FIG. 1, the cavity filter 1 is a filter body formed in the shape of a metallic enclosure that is long in the longitudinal direction and has a predetermined space (hereinafter referred to as a cavity) C inside. (10), a plurality of resonator installation bosses 15 provided spaced apart from each other on the bottom surface of the cavity C of the filter body 10, and a plurality of resonators 20 respectively installed on the resonator installation bosses 15. do.

In addition, as shown in FIG. 1, the cavity filter 1 is combined in a form that covers one open side of the cavity C formed in the filter body 10, and is formed into the cavity (C) through an external angle method of the frequency tuning designer. C) It further includes a filter cover 30 on which a tuning angle portion 31 is formed to facilitate internal frequency tuning. The tuning piercing portion 31 formed on the filter cover 30 is formed on the outer surface of the filter cover 30, but is machined to be relatively thinner than the thickness of the filter cover 30, and the tuning piercing portion 31 is located in the middle portion of the piercing portion 31. Since the correction hole 35 is formed, the frequency tuning designer can easily correct the incorrectly performed steering angle amount using a predetermined insertion tool (not shown).

The plurality of resonators 20 is screwed to the resonator bar 21 and the resonator installation boss 15 through the inside of the resonator bar 21, and performs primary frequency tuning as described later. It includes a tuning screw 23 that performs.

Here, the frequency tuning of the cavity filter 1 is primarily performed by adjusting the height within the cavity C of the resonant bar 21 through the tuning screw 23 of the resonant bar 21, thereby adjusting the surrounding configuration (e.g. , Frequency tuning is performed by adjusting the distance from the filter cover 30, and secondarily, the stamping portion 31 of the filter cover 30 located correspondingly to the upper side of each resonator 20 is cut using a predetermined stamping tool ( (not shown), detailed adjustment of frequency tuning can be made according to the amount of striking angle from the outside to the inside.

However, in the cavity filter 1 according to the prior art, the resonator installation boss 15 must be formed inside the filter body 10 in order to install the resonator bar 21. While there are limitations in the manufacturing method, there is a problem that the tuning screw 23 must be provided, which increases the overall weight of the antenna device and increases component costs.

The present invention was developed to solve the above-mentioned technical problem, and its purpose is to provide a cavity filter assembly that can reduce the overall weight of the antenna device.

Another object of the present invention is to provide a cavity filter assembly that can reduce costs by removing some of the parts of the cavity filter assembly.

In addition, another object of the present invention is to provide a cavity filter assembly that can improve product productivity by enabling each part to be manufactured using a variety of manufacturing methods.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

The cavity filter assembly according to an embodiment of the present invention is formed in a cylindrical shape with a filter body having a cavity as a predetermined space inside and one side open, and is moved from one open side to the other side and closes to the inside of the filter body. and at least one resonance bar installed on the filter body so that the other side is introduced and positioned, wherein the resonance bar is a front end surface of the closed other side and is parallel to the bottom surface of the filter body for frequency tuning within the cavity. A rudder part, which is a protruding surface protruding toward the cavity, is formed, and a tuning correction hole penetrating the rudder part is formed.

Here, in the resonant bar, frequency tuning within the cavity is performed through the striking angle of the striking angle portion on the outside of the filter body, and the tuned frequency may be modified through the tuning correction hole.

Additionally, frequency tuning within the cavity may be performed by an operation in which the striking portion of the resonance bar is struck into the cavity by a striking tool inserted from the outside of the filter body to the inside of the resonance bar, thereby deforming its shape.

In addition, correction of the frequency tuning within the cavity is performed by a pulling tool that is inserted from the outside of the filter body into the inside of the resonance bar and then inserted into the cavity through the tuning correction hole so that the striking portion of the resonance bar is outside the cavity. It can be performed by pulling and changing the shape.

In addition, it may further include a filter cover coupled along an edge of an edge of the filter body to form the cavity together with the filter body.

Additionally, a resonance bar installation hole for installation of the resonance bar may be formed in the filter body, and a coupling flange may be formed on the resonance bar to be closely coupled to an outer edge of the resonance bar installation hole.

Additionally, the tuning correction hole may be formed in the form of a hole having a predetermined diameter at the center of the rudder angle portion.

Additionally, the cavity may be provided in plurality by a partition wall partially dividing adjacent resonance bars among the at least one resonance bar or a window in the form of a part of the partition wall being cut.

Additionally, the cavity may be defined by the filter body manufactured by a molding method to have a box shape with one side open, and a filter cover manufactured by a pressing method to cover one open side of the filter body.

Additionally, one open side of the filter body may be a portion opposite to the other side where the at least one resonance bar is installed.

In addition, the cavity is combined with the filter body manufactured by a molding method to have a plate shape and along the edge edge of the filter body, and the deep drawing press method is used to have a box shape in which the portion corresponding to the filter body side is open. It can be defined by the filter cover manufactured by .

In addition, the cavity is formed by the filter body manufactured by an extrusion method so that the longitudinal one end and the other end are open, and one end cover and the other end cover covering the opened longitudinal one end and the other end of the filter body. can be defined.

Additionally, the resonant bar may be manufactured using a deep drawing press method.

The cavity filter assembly according to an embodiment of the present invention includes a filter body that defines a cavity that causes resonance and forms at least a bottom surface of the cavity, and has at least one resonance bar installation hole penetrating inside and outside, the filter The cavity is defined together with the body, and a portion of the space inside the cavity defined by the filter body and the filter cover is provided through a filter cover that shields the open portion of the filter body and a resonance bar installation hole of the filter body. It is installed to point, and includes at least one resonant bar where frequency tuning is achieved through deformation of the tip protruding surface inside the cavity.

According to the cavity filter assembly according to an embodiment of the present invention, the following various effects can be achieved.

First, since the fixed skew and resonator installation boss, which are major components of a conventional cavity filter, can be eliminated, the overall weight and component cost of the antenna device can be reduced.

Second, since the shape of the filter body can be simplified, the manufacturing method of the filter cover and resonator including the filter body can be diversified, which has the effect of improving the productivity of the product.

1 is an exploded perspective view showing a cavity filter assembly according to the prior art and a cross-sectional view taken along line AA in the assembled state;
Figure 2 is an upward perspective view and a downward perspective view showing a cavity filter assembly according to the first embodiment of the present invention;
Figure 3 is an exploded perspective view showing the filter cover in the configuration of Figure 2 in a separated state;
Figure 4 is an exploded perspective view for explaining the implementation of coupling by the cavity filter assembly according to the first embodiment of the present invention;
Figure 5 is a cut-away perspective view for explaining the operation of the input side notch bar and the output side notch bar in the configuration of Figure 4;
Figures 6a and 6b are a downward exploded perspective view and an upward exploded perspective view showing the filter cover and the resonant bar in the configuration of Figure 2 in a separated state;
Figure 7 is a vertical cross-sectional view of Figure 2 and a partial enlarged view thereof;
Figure 8 is a vertical cross-sectional view of Figure 2 and a partially enlarged view thereof;
9A and 9B are exploded perspective views and cross-sectional views of the cavity filter assembly according to the second and third embodiments of the present invention.

Hereinafter, embodiments of the cavity filter assembly according to the present invention will be described in detail with reference to the attached drawings.

When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. Additionally, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present application. No.

Figure 2 is an upward perspective view and a downward perspective view showing the cavity filter assembly according to the first embodiment of the present invention, Figure 3 is an exploded perspective view showing the filter cover in the configuration of Figure 2 in a separated state, and Figure 4 is an exploded perspective view of the cavity filter assembly according to the first embodiment of the present invention. It is an exploded perspective view for explaining the implementation of coupling by the cavity filter assembly according to the first embodiment, and Figure 5 is a cut-away perspective view for explaining the operation of the input side notch bar and the output side notch bar in the configuration of Figure 4, Figures 6a and Figure 6b is a downward exploded perspective view and an upward exploded perspective view showing the filter cover and the resonance bar in the configuration of Figure 2 in a separated state.

As shown in FIGS. 2 to 6B, the cavity filter assembly 100 according to the first embodiment of the present invention includes a filter body 110 having a cavity (C), which is a predetermined space therein, and a filter. It may include at least one resonance bar 120 provided for frequency filtering within the cavity C of the body 110.

Here, the at least one resonance bar 120 may be formed in a cylindrical shape with one side open, and may be installed on the filter body 110 so that the other closed side is introduced into the inside of the filter body 110. However, the external shape of the resonance bar 120 is not necessarily limited to a complete cylindrical shape, but includes a cylindrical shape whose diameter gradually decreases toward the other closed side. In this case, the diameter of one open side of the resonance bar 120 may be larger than the diameter of the other closed side (the steering angle portion 124 to be described later).

Meanwhile, the cavity filter assembly 100 according to the first embodiment of the present invention is a filter manufactured by a molding method so that the cavity C has a box shape with one side open, as shown in FIGS. 2 to 4B. It can be understood as a space defined by the body 110 and the filter cover 130 manufactured by a press method to cover one open side of the filter body 110. However, it should be noted in advance that the cavity C may be defined differently from the cavity filter assembly 100 according to the first embodiment described above, as in the second and third embodiments described later.

A plurality of cavities C may be provided inside the filter body 110 to be divided into a number corresponding to the number of resonance bars 120 .

More specifically, as referred to in FIG. 3, in the cavity filter assembly 100 according to the first embodiment of the present invention, seven resonant bars 120 are located in the cavity C of the filter body 110. It can be provided. The seven resonant bars 120 implement coupling characteristics during the process of transmitting the electrical signal supplied from the input connector 111a on one side to the adjacent resonant bar 120, and the output connector 111b on the other side. It is equipped to output an electrical signal through.

Here, the coupling characteristics between each resonating bar 120 in the cavity C are realized by cutting the partition wall 113 formed to partition the cavity C as many as the number of resonance bars 120 and a portion of the partition wall 113. The frequency band to be filtered can be precisely adjusted by the window 114 in the form of a window 114.

In the cavity filter assembly 100 according to the first embodiment of the present invention, the filter body 110 is provided to have a rectangular parallelepiped shape elongated in the longitudinal direction, as shown in FIGS. 3 and 4, and has an internal Seven cavities (C) are formed by the partition wall 113 and the window 114 that are integrally formed (or manufactured and installed separately), and each cavity ( It is placed in C) and functions as seven resonators.

Such a filter body 110 may be manufactured using a molding method. The molding material of the filter body 110 may include a non-conductive resin material such as plastic. However, the filter body 110 is coated with a metal film on the inner surface forming the cavity (C) so that coupling characteristics according to the electrical signal within the cavity (C) can be implemented, so that the cavity (C) and It can be provided to completely block external electromagnetic waves.

Meanwhile, in the filter body 110, a plurality of resonance bar installation holes ( 115) can be processed and formed into a circular shape. The plurality of resonance bar installation holes 115 may be formed to be stepped so that the edge portion of the resonance bar 120 is in close contact with the resonance bar 120.

Here, the front end surface of the resonant bar 120 is parallel to the bottom surface of the filter body 110 in the cavity (C) for frequency tuning in the cavity (C), as shown in FIG. 3. A angled portion 124, which is a protruding surface protruding from the bottom surface toward the cavity C (more preferably, one open side of the filter body 110), is formed.

The resonance bar 120 is formed in a cylindrical shape with an opening to the outside (one side) of the filter body 110, and when inserted through the resonance bar installation hole 115 of the filter body 110, the empty interior is formed into a cavity (C ) is located on the inside, and the edge end of the open side of the resonance bar 120 may be tightly coupled to the stepped resonance bar installation hole 115.

For this purpose, a coupling flange 127 may be formed on the resonance bar 120 to be tightly coupled to the outer edge of the terminal-shaped resonance bar installation hole 115. The coupling flange 127 and the resonance bar installation hole 115 can be closely coupled in various ways, and it is natural that bonding coupling using a bonding material is also possible.

The stamped portion 124 is inserted from the outside of the filter body 110 through the empty interior of the resonance bar 120 using a stamping tool (not shown), and then stamped with a predetermined external force, and is stamped into the cavity C to form a shape. It may be a configuration in which frequency tuning within the cavity C is performed through a deforming operation. That is, secondary frequency tuning within the cavity C may be performed depending on the amount of the steering angle of the steering angle portion 124.

Meanwhile, the resonance bar 120 may further have a tuning correction hole 125 penetrating the steering angle portion 124, as shown in FIG. 3 .

The tuning correction hole 125 is a pulling tool (opposite concept to the striking tool) when modification of the frequency tuning is required when changing the shape by striking the striking part 124 to the inside of the cavity (C) using a striking tool ( The tuned frequency tuning state can be modified again by adjusting the steering angle using (not shown). The tuning correction hole 125 may be formed in the shape of a hole having a predetermined diameter at the center of the steering angle portion 124. Here, since the horizontal area of the rudder part 124 is required to be the minimum area required for frequency tuning, the tuning correction hole 125 has a size that ensures that the area of the rudder part 124 is wider than the above minimum area. It is desirable to have it.

More specifically, the pulling tool, not shown, is formed in a structure that protrudes toward the cavity (C) through the tuning correction hole 125 and then catches on the edge of the cavity (C) side of the tuning correction hole 125, In this way, when the pulling tool caught on the edge of the tuning correction hole 125 is pulled outward (i.e., toward one open side of the resonance bar 120), it is struck by the striking tool and the shape is deformed to the inside of the cavity (C). The rudder angle portion 124 is pulled to its original position, thereby making it possible to correct the frequency tuning by correcting the rudder angle in a direction to reduce it.

Meanwhile, the cavity filter assembly 100 according to the first embodiment of the present invention, as described above, has one open side of the filter body 110 (of the resonance bar 120 when the resonance bar 120 is referenced). It may further include a filter cover 130 provided to cover the closed other side.

Unlike the filter body 110, the filter cover 130 may be manufactured using a press method. For this purpose, the filter cover 130 may be made of a metal material. However, the manufacturing method of the filter cover 130 is not limited to the press method. The filter cover 130 may be manufactured by a molding method like the filter body 110. In this case, it includes a plastic resin molding material, and when manufactured with a plastic resin molding material, it has a cavity (like the filter body 110). C) It is natural that a metal film can be formed to block internal and external electromagnetic waves.

That is, the filter cover 130 is coupled to cover one open side of the filter body 110, as shown in FIGS. 6A and 6B, thereby forming a cavity (i.e., coupling characteristics) for implementing frequency characteristics (i.e., coupling characteristics). C) defines the internal space and, together with the filter body 110, plays a role in blocking the influence of the external electromagnetic wave environment to be minimized.

The electrical signal input through the input connector 111a is sequentially passed through a plurality of resonant bars 120a to 120g provided spaced apart in a straight direction inside the filter body 110 to perform frequency filtering and then to the output connector. It is output through (111b).

However, when the resonant bars 120a to 120g are arranged in a straight line in one direction as in the cavity filter assembly 100 according to the first embodiment of the present invention, adjacent coupling between adjacent resonant bars can be smoothly implemented. On the other hand, there is a difficult problem in implementing cross coupling to form specific notches on the left and right sides of the pass band. This is because cross-coupling is generally implemented by transmitting an input electrical signal to a resonant bar that skips one or two or more adjacent resonant bars (or cavities), and the resonant bars 120a to 120g (or cavities) are This is because it is difficult to design such a structure when it is arranged in a long straight line.

Accordingly, the cavity filter assembly 100 according to the first embodiment of the present invention, as shown in FIGS. 4 and 5, has a first resonant bar 120a where the input connector 111a is formed at an ultra-short resonator and a first resonant bar 120a. It is designed to be located between the second resonant bar 120b adjacent thereto, and the formation position of the output connector 111b is located between the seventh resonant bar 120g, which is an end resonator, and the sixth resonant bar 120f adjacent thereto. It is designed to be The ends of the input connector 111a and the output connector 111b may be exposed to protrude into the cavity C through an input porthole (not indicated) and an output porthole (not indicated), respectively.

Furthermore, the cavity filter assembly 100 according to the first embodiment of the present invention is electrically connected to the input connector 111a, as shown in FIGS. 4 and 5, and one end is connected to the first resonating bar 120a. is located in the cavity corresponding to, the other end is located in the cavity corresponding to the second resonating bar 120b, the input side metal notch bar 141, and one end is located in the cavity corresponding to the seventh resonating bar 120g, , the other end may include an output-side metal notch bar 142 located in the cavity corresponding to the sixth resonant bar 120f.

The input-side metal notch bar 141 implements cross-coupling by allowing the dry signal input through the input connector 111a to skip one first resonance bar 120a and transmit it to the second resonance bar 120b. A specific notch (more specifically, an L-Notch) is formed at the right end of the pass band, and the output side metal notch bar 142 allows the electrical signal passing through the sixth resonance bar 120f to pass through the seventh resonance bar ( 120g), a specific notch (more specifically, a C-Notch) can be formed at the left end of the pass band by implementing cross coupling while outputting to the output connector 111b.

At this time, the input side metal notch bar 141 is short so as to directly contact the structure in the cavity C. As described above, an L-Notch is formed at the right end of the pass band, while the output side metal notch bar 141 is short to directly contact the structure in the cavity C. As shown in FIGS. 4 and 5, (142) is a bar pass that is opened through a Teflon block 143 made of a dielectric material to prevent direct contact with the structure of the cavity (C). A C-Notch is formed at the left end of the band.

FIG. 7 is a vertical cross-sectional view of FIG. 2 and a partially enlarged view thereof, and FIG. 8 is a vertical cross-sectional view of FIG. 2 and a partially enlarged view thereof.

As shown in FIGS. 7 and 8, the cavity filter assembly 100 according to the first embodiment of the present invention is installed inside the cavity (C) defined by the filter body 110 and the filter cover 130. A plurality of resonance bars 120 are inserted and installed, and frequency tuning within the cavity C is performed by inserting a striking tool through the empty internal space of the resonance bar 120 to adjust the striking angle amount of the striking part 124. You can. At this time, the plurality of resonance bars 120 are installed so that the coupling flanges 127 are coupled to each other at the outer edge end of the plurality of resonance bar installation holes 115 formed in the filter body 110, and are open on one side. As it is provided in a cylindrical shape, the stamped portion 124 can be stamped through the open portion using a stamping tool.

The cavity filter assembly 100 according to the first embodiment of the present invention is different from the striking angle direction of the cavity filter assembly 1 according to the prior art illustrated in FIG. 1, and the direction of the resonance bar 120 itself is different. A bar is provided so that frequency tuning within the cavity (C) can be performed through shape deformation, and a resonance bar installation boss (see reference numeral 15 in FIG. 1) for installation of a resonant bar (see reference numeral 21 in FIG. 1) compared to the prior art. ) can be deleted, and the tuning screw 23 can also be deleted, so not only can the manufacturing method of the filter body 110 be diversified, but the overall manufacturing cost can be reduced.

Looking at the advantages in terms of manufacturing method, for example, as shown in FIG. 1, when the filter body 10 is integrally equipped with a resonance bar installation boss (see reference numeral 15 in FIG. 1), the filter body The manufacturing method of (10) has no choice but to use a molding method, and there are limits to manufacturing using the extrusion method or press method due to the shape of the resonance bar installation boss 15.

In addition, the cavity filter assembly 100 according to the first embodiment of the present invention includes frequency tuning within the cavity C in the filter cover 30 among the configurations of the cavity filter assembly 1 according to the prior art illustrated in FIG. 1. Unlike the striking portion 31 formed integrally with the resonating bar 120, the striking portion 124 is provided on the resonating bar 120, and the shape of the striking portion 124 of the resonating bar 120 that is completely unrelated to the filter cover 130 is deformed. Since frequency tuning can be performed through this method, it is possible to diversify the manufacturing method of the filter cover 130. That is, the filter cover 130 is not formed with an angle portion 31 for frequency tuning and only performs the function of shielding the cavity C, so the manufacturing method is improved by simplifying the shape of the filter cover 130. can be diversified.

More specifically, as shown in FIG. 1, when the stamped portion 31 is formed on the filter cover 30, manufacturing may be limited to a molding method, whereas the stamped portion 31 from the filter cover 30 may be limited to manufacturing. If is deleted, it is natural that the filter cover 130 can be manufactured by extrusion (see the third embodiment of the present invention) or deep drawing press method (including general press method) (see the second embodiment of the present invention). It will be said that it is.

Meanwhile, in the cavity filter assembly 100 according to the first embodiment of the present invention, as shown in FIGS. 2 to 8, the resonant bar 120 may be manufactured by a deep drawing press method. As is well known, the deep drawing press method is an advantageous method for manufacturing a molded product in a cylindrical shape (or a rectangular shape) with only one side open by placing a plate on a die and using a punch mechanism.

9A and 9B are exploded perspective views and cross-sectional views of the cavity filter assembly according to the second and third embodiments of the present invention.

As shown in FIGS. 2 to 8, the cavity filter assembly 100 according to the first embodiment of the present invention is a filter body in which the cavity C for substantially implementing frequency characteristics is opened on one side. It is defined by 110 and a filter cover 130 coupled to cover one open side of the filter body 110, but the cavity C does not necessarily have to be defined according to the first embodiment.

That is, as referred to in the second embodiment of the present invention referred to in Figure 9a, the cavity C is a filter body 110a manufactured by a molding method to have a plate shape and an edge edge of the filter body 110a. It can be defined by a filter cover (130a) manufactured by a deep drawing press method that is coupled along and has a box shape with an open portion corresponding to the filter body (110a). Since the filter cover 130a itself can be manufactured using a deep drawing press method, product productivity can be greatly improved.

Furthermore, as referred to in the third embodiment of the present invention referred to in FIG. 9B, the cavity C includes a filter body 110b manufactured by an extrusion method so that one end and the other end in the longitudinal direction are open, and a filter body. It may be defined by one end cover 110b-1 and the other end cover 110b-2 covering the opened longitudinal direction one end and the other end of (110b). Compared to the cavity filter assembly 100 according to the first embodiment, the filter cover 130 itself, which substantially covers the open side of the cavity C, can be removed, and the filter cover 110b can be easily formed through an extrusion method. Since it can be manufactured, the productivity of the product can be greatly improved.

In addition, the cavity filter assembly 100 according to the first to third embodiments of the present invention configured as described above, compared to the prior art, fixes the resonance bar 20 using a separate tuning screw 23. Since there is no need for tuning or primary frequency tuning, the tuning screw 23 is not needed from the beginning, and some of the component configuration can be deleted. In this way, it is natural that a reduction in the manufacturing cost of a product can also be achieved through a reduction in the cost of parts due to deletion of the component configuration.

As described above, the cavity filter assembly according to the first to third embodiments of the present invention may be defined as follows.

That is, the cavity filter assembly according to embodiments of the present invention defines a cavity (C) that causes resonance, forms the bottom of the cavity (C), and has at least one resonance bar penetrating inside and outside. A filter body 110 in which a hole 115 is formed, a filter cover 130 that defines a cavity C together with the filter body 110 and shields the open portion of the filter body 110, and a filter body ( It is installed to occupy part of the space inside the cavity (C) defined by the filter body 110 and the filter cover 130 through the resonance bar installation hole 115 of 110, and the protruding surface of the tip inside the cavity (C) It can be defined as a structure that includes at least one resonant bar 120 where frequency tuning is performed through modification of the striking portion 124.

Here, compared to the cavity filter assembly according to the prior art (see Figure 1 and the 'Background Technology of the Invention' section), in the case of the prior art, the shape of the tuning stamp formed on the filter cover for frequency tuning within the cavity (C) and changing the tuning screw, but in the embodiments of the present invention, only the protruding surface of the tip of the resonating bar 120 (the angled portion 124) is changed for frequency tuning within the cavity C, which is similar to the prior art. This leads to differences in frequency tuning methods.

Above, embodiments of the cavity filter assembly according to the present invention have been described in detail with reference to the attached drawings. However, the embodiments of the present invention are not necessarily limited to the above-described embodiments, and it is natural that various modifications and equivalent implementations can be made by those skilled in the art. will be. Therefore, the true scope of rights of the present invention will be determined by the claims described later.

100: cavity filter assembly 110: filter body
111a: input connector 111b: output connector
113: partition wall 114: window
115: resonance bar installation hole 120: resonance bar
124: Steering wheel part 125: Tuning correction hole
127: coupling flange 130: filter cover

Claims (14)

A filter body having a cavity, which is a predetermined space inside;
a filter cover coupled along an edge of an edge of the filter body to form the cavity together with the filter body; and
At least one resonance bar formed in a cylindrical shape with one side open, and installed on the filter body so that the other closed side flows from the open side to the other side and is positioned inside the filter body; Including,
The resonance bar is a front end surface of the other closed side, and forms a steering angle portion, which is a protruding surface parallel to the bottom surface of the filter body and protruding toward the cavity, in order to tune the frequency within the cavity, and also forms a tuning correction portion penetrating the steering angle portion. A hole is formed,
A cavity filter assembly in which a resonance bar installation hole is formed in the filter body so that the resonance bar is inserted and installed from the outside of the bottom surface of the cavity into the interior of the cavity. In claim 1,
The resonance bar is a cavity filter assembly in which frequency tuning within the cavity is performed through the striking angle of the striking portion on the outside of the filter body, and the tuned frequency can be modified through the tuning correction hole. In claim 1,
Frequency tuning within the cavity is,
A cavity filter assembly, wherein an operation is performed in which a stamped portion of the resonance bar is struck into the cavity and its shape is deformed by a stamping tool inserted from the outside of the filter body to the inside of the resonance bar. In claim 3,
Correction of the frequency tuning within the cavity is performed by pulling the striking portion of the resonance bar to the outside of the cavity by a pulling tool that is inserted from the outside of the filter body into the inside of the resonance bar and then inserted into the cavity through the tuning correction hole. A cavity filter assembly, which is performed by an operation in which the shape is deformed. delete In claim 1,
A cavity filter assembly wherein the resonance bar is formed with a coupling flange that is tightly coupled to the outer surface of the edge of the resonance bar installation hole. In claim 1,
The tuning correction hole is a cavity filter assembly formed in the shape of a hole having a predetermined diameter at the center of the angled portion. In claim 1,
The cavity filter assembly includes a plurality of cavities, including a partition wall that partially partitions adjacent resonant bars among the at least one resonant bar, or a window in the form of a part of the partition wall being cut. In claim 1,
The cavity is defined by the filter body manufactured by a molding method to have a box shape with one side open, and a filter cover manufactured by a pressing method to cover the open one side of the filter body. In claim 9,
A cavity filter assembly wherein one open side of the filter body is opposite to the other side where the at least one resonance bar is installed. In claim 1,
The cavity is coupled to the filter body, which is manufactured using a molding method to have a flat plate shape, along an edge of the edge of the filter body, and is manufactured using a deep drawing press process to have a box shape with an open portion corresponding to the filter body side. Cavity filter, defined by the filter cover. In claim 1,
The cavity is defined by the filter body manufactured by an extrusion method so that one longitudinal end and the other end are open, and one end cover and the other end cover covering the opened longitudinal one end and the other end of the filter body. , cavity filter assembly. The method of any one of claims 9 to 12,
The resonance bar is a cavity filter assembly manufactured by a deep drawing press method. a filter body that defines a cavity causing resonance and forms at least a bottom surface of the cavity, and has at least one resonance bar installation hole penetrating inside and outside;
a filter cover that defines the cavity together with the filter body and shields an open portion of the filter body; and
It is inserted into the cavity from the outside of the bottom surface of the cavity to occupy a portion of the space inside the cavity defined by the filter body and the filter cover through the resonance bar installation hole of the filter body, and is installed inside the cavity. At least one resonant bar whose frequency is tuned through deformation of the protruding surface of the tip of the bar; A cavity filter assembly comprising:

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