KR102081950B1 - High frequency filter and apparatus for tunning the same - Google Patents

Abstract

Disclosed are a high frequency filter capable of easily performing frequency tuning and a device for tuning the same. According to one disclosed embodiment of the present invention, the device for tuning the high frequency filter comprises: a base panel in which the high frequency filter is seated; a tuning adjustment unit provided to press a tuning unit of the high frequency filter from top of the high frequency filter; and an insert guide to which the tuning adjustment unit is inserted and coupled, wherein the tuning adjustment unit is provided to be movable in a vertical direction.

Description

High frequency filter and its tuning device {HIGH FREQUENCY FILTER AND APPARATUS FOR TUNNING THE SAME}

Embodiments of the present invention relate to frequency tuning techniques of high frequency filters.

In general, high frequency filters are used in most transmission and reception communication equipment, such as a mobile communication base station or a repeater. Among them, a cavity filter having a cavity structure is mainly used for a device requiring high power, such as a mobile communication base station. The cavity filter has a structure in which a plurality of cavities are formed inside the filter and a resonator is installed in the cavity, and the filter performs filtering through resonance in each cavity.

Korean Patent Publication No. 10-2009-0036327 (2009.04.14)

An embodiment of the present invention is to provide a high frequency filter and its tuning device that can easily perform frequency tuning.

An apparatus for tuning a high frequency filter according to an embodiment of the present disclosure includes a base panel on which a high frequency filter is mounted; A tuning controller provided to press the tuning unit of the high frequency filter on the upper portion of the high frequency filter; And an insert guide in which the tuning control unit is inserted and coupled, and the tuning control unit is provided to be movable up and down.

The insert guide includes a tuning adjustment part insertion hole into which the tuning adjustment part is inserted, and a first thread is provided on an outer surface of the tuning adjustment part, and a second thread corresponding to the first thread on an inner surface of the tuning adjustment part insertion hole. A thread is provided, and the tuning adjustment part may be provided to maintain the state coupled with the insert guide while moving up and down along the tuning adjustment part insertion hole.

The tuning control unit may move downward while rotating in the first direction to press the tuning unit, and the degree of stretching the tuning unit down may be adjusted according to the degree of pressing the tuning unit.

The tuning unit may include a first tuning unit provided on an upper surface of the case unit of the high frequency filter and provided at positions corresponding to resonators in the high frequency filter, respectively; And a second tuning part provided on an upper surface of the case part of the high frequency filter to be positioned between resonators in the high frequency filter, wherein the tuning control part is positioned above the first tuning part in the insert guide, respectively. A first tuning control unit which presses the first tuning unit on an upper part of the tuning unit so that the first tuning unit extends downward; And a second tuning control unit positioned at an upper portion of the second tuning unit in the insert guide and compressing the second tuning unit from the top of the second tuning unit so that the second tuning unit extends downward.

The insert guide may include: a first fixing part fixed to the base panel at one side of an upper surface of the base panel and provided higher than the high frequency filter; A second fixing part fixed to the base panel on the other side of the upper surface of the base panel and provided at a height corresponding to the first fixing part; And a guide part connected to an end of the first fixing part and an end of the second fixing part, and inserted into and coupled to the tuning adjusting part so as to be movable up and down.

The tuning device for the high frequency filter may include a first connector provided on a bottom surface of the base panel and electrically connected to an input terminal of the high frequency filter; A second connector provided on a lower surface of the base panel and electrically connected to an output terminal of the high frequency filter; And a stand supporting the base panel at a lower portion of the base panel and spaced apart from the base panel by a predetermined distance from the ground.

In another aspect, a tuning device for a high frequency filter includes a base panel on which a high frequency filter is mounted; A tuning controller provided to press the tuning unit of the high frequency filter on the upper portion of the high frequency filter; A tuning adjustment jig provided on an upper portion of the high frequency filter and coupled to the tuning adjustment unit and movable to a first axis and a second axis perpendicular to the first axis; And a rotation driving unit configured to move the tuning control unit up and down in a state of being coupled to the tuning control jig.

The tuning adjustment jig includes a tuning adjustment part insertion hole into which the tuning adjustment part is inserted, a first thread is provided on an outer surface of the tuning adjustment part, and an inner surface of the tuning adjustment part insertion hole corresponds to the first thread. Two threads are provided, and the tuning adjustment unit may be provided to maintain the state coupled with the tuning adjustment jig while moving up and down along the tuning adjustment unit insertion hole.

The rotation drive unit, the first gear provided on the outer surface of the tuning adjustment unit; A second gear provided on one side of the first gear and engaged with the first gear; And a motor for rotating the second gear in a first direction or in a second direction opposite to the first direction, wherein the tuning adjustment part is rotated downwardly along the tuning adjustment part insertion hole while rotating by the rotation driving part. It may be moved to press the tuning portion, so that the tuning portion is stretched down.

The tuning jig includes: a first jig frame provided in parallel with the base panel at an upper portion of the high frequency filter; And a second jig frame provided in parallel with the first jig frame at an upper portion of the first jig frame, wherein the tuning adjustment part is inserted through the first jig frame and includes the first jig frame and the screw. It may be provided to be coupled to move up and down.

The rotation driving unit may be provided in a space between the first jig frame and the second jig frame, and the rotation driving unit may include a first gear provided on an outer surface of the tuning adjustment unit; A second gear provided on one side of the first gear and engaged with the first gear; And a motor for rotating the second gear in a first direction or in a second direction opposite to the first direction, wherein the tuning controller moves downward while rotating by the rotation driving unit to press the tuning unit, The tuning unit may be stretched downward.

In one embodiment, a high frequency filter includes a base plate made of a conductive material; At least one resonator formed on the base plate and provided to form a resonance in a frequency band used by the high frequency filter; A case part covering the base plate and the resonator on an upper portion of the base plate and made of a conductive material; And a tuning part provided on an upper surface of the case part, the tuning part for tuning a resonance frequency of the resonator, wherein the tuning part has a thickness thinner than a thickness of the upper surface of the case part, and is recessed downward based on the upper surface of the case part. It includes one or more recesses are provided, and is provided to be stretched down by the pressure applied from the top.

The recessed portion, the first recessed portion provided along the edge of the tuning unit; And a second concave portion provided at the center portion of the tuning portion, wherein the first concave portion and the second concave portion may have different depths.

The tuning part may further include a convex part connecting the first concave part and the second concave part, and the convex part may be provided at a height equal to or less than an upper surface of the case part.

According to the disclosed embodiment, by forming a tuning portion having a thickness thinner than the upper surface of the case portion and having at least one concave portion on the upper surface of the case portion, the degree of pressing of the tuning portion can be easily adjusted without affecting other portions. Therefore, the resonant frequency of the resonator can be finely tuned.

In addition, the resonant frequency of the high frequency filter can be easily tuned through an automated tuning system, thereby reducing the manufacturing time of the high frequency filter, thereby reducing the cost and mass production, and reducing the cost of tuning the high frequency filter. You can do it. That is, in the past, the tuning of the high frequency filter was performed manually by a skilled worker. In this case, a lot of time and cost are consumed to increase the cost and increase the product production time. The cost and time of the tuning work can be minimized.

1 is an exploded perspective view of a high frequency filter according to an embodiment of the present invention;
2 is a perspective view showing a coupling of a high frequency filter according to an embodiment of the present invention;
Figure 3 is a bottom perspective view of the case portion in the high frequency filter according to an embodiment of the present invention
4 is a bottom perspective view of a notch filter unit according to an exemplary embodiment of the present invention.
5 is a cross-sectional view showing a tuning unit according to an embodiment of the present invention.
6 is a graph showing an S parameter of a high frequency filter according to an embodiment of the present invention.
7 is a view showing a tuning device for a high frequency filter according to an embodiment of the present invention
8 is a view showing a tuning device of a high frequency filter according to another embodiment of the present invention
9 is a diagram illustrating an automated tuning system of a high frequency filter according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to assist in a comprehensive understanding of the methods, devices, and / or systems described herein. However, this is only an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, and may be changed according to intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification. The terminology used in the description is for the purpose of describing embodiments of the invention only and should not be limiting. Unless expressly used otherwise, the singular forms “a,” “an,” and “the” include plural forms of meaning. In this description, expressions such as "comprises" or "equipment" are intended to indicate certain features, numbers, steps, actions, elements, portions or combinations thereof, and one or more than those described. It should not be construed to exclude the presence or possibility of other features, numbers, steps, actions, elements, portions or combinations thereof.

Meanwhile, directional terms such as upper side, lower side, one side, the other side, and the like are used in connection with the orientation of the disclosed drawings. Since components of the embodiments of the present invention may be positioned in various orientations, the directional terminology is used for the purpose of illustration and not limitation.

In addition, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

1 is an exploded perspective view of a high frequency filter according to an embodiment of the present invention, FIG. 2 is a combined perspective view of a high frequency filter according to an embodiment of the present invention, and FIG. 3 is a high frequency filter according to an embodiment of the present invention. 4 is a bottom perspective view of the case part, and FIG. 4 is a bottom perspective view of the notch filter part according to the exemplary embodiment of the present invention.

1 to 4, the high frequency filter 100 may include a base plate 102, a resonator 104, a notch filter unit 106, and a case unit 108.

The base plate 102 may be a part of the bottom surface (lower surface) of the high frequency filter 100. The base plate 102 may be made of a flat plate of a conductive material. The base plate 102 may be formed in a plane having a rectangular shape having a predetermined length and width, but is not limited thereto.

The resonator 104 is a portion which forms a resonance at the use frequency (ie, the filtering frequency) of the high frequency filter 100. For example, when the high frequency filter 100 is a band pass filter, the resonator 104 may be provided to form resonance in the pass band. The resonator 104 may be provided on the base plate 102. In an exemplary embodiment, the resonator 104 may be provided on the top surface of the base plate 102.

A plurality of resonators 104 may be provided on the upper surface of the base plate 102 spaced apart from each other. When a plurality of resonators 104 are formed, each resonator 104 may be provided spaced at a predetermined interval. The number of resonators 104 may be set to an appropriate number depending on the performance of the communication system using the high frequency filter 100 and the frequency selectivity required in the communication system.

The resonator 104 may include a connecting portion 104a and a frequency adjusting portion 104b. One end of the connecting portion 104a may be connected to the base plate 102. In an exemplary embodiment, the connecting portion 104a may be provided perpendicular to the base plate 102 at the top surface of the base plate 102. In addition, the connecting portion 104a may be provided in a form bent several times. For example, the connecting portion 104a may be bent in a zigzag form, and in this case, the entire volume of the high frequency filter 100 may be reduced while resonance occurs in a frequency band of the high frequency filter 100. .

The frequency adjusting unit 104b may be provided at the other end of the connecting unit 104a. The frequency adjusting unit 104b may serve to adjust the frequency so that the resonator 104 resonates in the frequency band used by the high frequency filter 100. The frequency adjusting unit 104b may be provided perpendicular to the connection unit 104a. That is, the frequency adjusting unit 104b may be provided in parallel with the base plate 102.

The frequency adjusting unit 104b may be provided to have a width wider than that of the connection unit 104a. As the area of the frequency adjusting unit 104b increases, the resonant frequency of the corresponding resonator 104 decreases. Accordingly, the resonant frequency of the corresponding resonator 104 can be adjusted through the area of the frequency adjusting unit 104b. In addition, an end portion of the frequency adjusting unit 104b may be bent toward the base plate 102. However, the shape of the resonator 104 is not limited thereto, and various other forms may be formed.

An input terminal 111 may be provided in the resonator 104-1 provided at one side of the base plate 102. One end of the input terminal 111 may be connected to the resonator 104-1, and the other end of the input terminal 111 may pass through the base plate 102 and be exposed to the bottom surface of the base plate 102. The signal received by the antenna of the communication system may be input to the input terminal 111.

An output terminal 113 may be provided in the resonator 104-2 provided on the other side of the base plate 102. One end of the output terminal 113 may be connected to the resonator 104-2, and the other end of the output terminal 113 may pass through the base plate 102 and be exposed to the bottom surface of the base plate 102. The signal filtered through the high frequency filter 100 may be output to the output terminal 113.

In an exemplary embodiment, the base plate 102 and the resonator 104 may be integrally provided through a metal injection molding (MIM) technique. That is, a metal powder and a binder are mixed to form a powder mixture, and the powder mixture is manufactured by forming an integrated shape of the base plate 102 and the resonator 104 through an injection molding process, and then the binder is removed and the base is subjected to a sintering process. Plate 102 and resonator 104 may be fabricated.

However, the present invention is not limited thereto, and the base plate 102 and the resonator 104 may be formed separately. In addition, the resonator 104 may be formed on a printed circuit board (PCB).

The notch filter part 106 may be provided on the base plate 102. The notch filter unit 106 may be provided to remove a frequency band adjacent to the use frequency band of the high frequency filter 100. That is, the notch filter unit 106 is a frequency adjacent to the use frequency band of the high frequency filter 100 in the signal of the high frequency filter 100 in order to prevent the signal of the high frequency filter 100 from interfering with the signal of the adjacent frequency band. It can serve to remove the band. In an exemplary embodiment, the notch filter unit 106 may be formed by the MIM technique, but is not limited thereto.

The notch filter part 106 may be spaced apart from the base plate 102 at the top of the base plate 102. The notch filter part 106 may include a body part 106a, a body support part 106b, and a coupling part 106c.

The main body 106a may be provided along the longitudinal direction of the base plate 102 at the top of the base plate 102. The body portion 106a may be provided shorter than the length of the base plate 102. The body portion 106a may be provided with a width shorter than that of the base plate 102. The main body 106a may be provided in parallel with the base plate 102 at the top of the base plate 102. The main body 106a may be made of a conductive material.

At least one main body support part 106b may be provided on the main body part 106a. The main body support 106b may be coupled to the main body 106a. In an exemplary embodiment, the body portion 106a may be provided with a coupling protrusion 106a-1. The coupling protrusion 106a-1 may be bent upward from the edge of the main body 106a and protrude. In addition, the main body support portion 106b may be provided with an insertion hole 106b-1 into which the coupling protrusion 106a-1 is inserted. The coupling protrusion 106a-1 may be inserted into the insertion hole 106b-1. As the coupling protrusion 106a-1 is inserted into the insertion hole 106b-1, the main body 106a and the main body support 106b may be coupled to each other.

The main body support part 106b may be coupled to the case part 108. That is, when the case portion 108 is seated on the base plate 102, the main body support portion 106b may be coupled to the case portion 108, whereby the main body portion 106a may be connected to the base plate 102. It is possible to maintain the spaced apart state. Coupling grooves 106b-2 may be provided in the main body support unit 106b. The coupling groove 106b-2 may be provided along the width direction of the main body support part 106b. The coupling groove 106b-2 may be coupled to the partition wall of the case part 108. Detailed description thereof will be described later.

The body support 106b may be made of a dielectric. Accordingly, the main body support portion 106b can be electrically separated from the main body portion 106a and the case portion 108 made of a conductive material.

One end of the coupling part 106c may be connected to the main body part 106a. The coupling unit 106c may be provided to be electrically coupled with the resonator 104. The coupling unit 106c may serve to cause the notch characteristic to appear in a frequency band adjacent to the use frequency band of the resonator 104. The coupling part 106c may include a first coupling part 106c-1 and a second coupling part 106c-2.

The first coupling unit 106c-1 may be provided at one side of the main body unit 106a. One end of the first coupling part 106c-1 may be connected to the main body part 106a and be bent upward. The other end of the first coupling unit 106c-1 may be provided facing the one resonator 104 of the plurality of resonators 104. The first coupling unit 106c-1 may generate electrical coupling with the opposing resonator 104 (second resonator from the left in FIG. 1). Here, the amount of electrical coupling can be adjusted by adjusting the area of the other end of the first coupling portion 106c-1.

The second coupling part 106c-2 may be provided on the other side of the main body part 106a. One end of the second coupling unit 106c-2 may be connected to the main body unit 106a and be bent upward. The other end of the second coupling unit 106c-2 may be provided facing the other resonator 104 of the plurality of resonators 104. The second coupling unit 106c-2 may generate electrical coupling with the opposing resonator 104 (second resonator from the right in FIG. 1). Here, the amount of electrical coupling can be adjusted by adjusting the area of the other end of the second coupling portion 106c-2.

Here, one or more resonators 104 may be included between the resonator 104 facing the first coupling part 106c-1 and the resonator 104 facing the second coupling part 106c-2. In FIG. 1, the resonator 104 (second left resonator in FIG. 1) facing the first coupling part 106c-1 and the resonator 104 (right side in FIG. 1) facing the second coupling part 106c-2 are shown. It is shown that two resonators 104 are included between the second resonators).

On the other hand, here, the first coupling portion 106c-1 faces the second resonator on the left side, the second coupling portion 106c-2 faces the second resonator on the right side, and two resonators are included therebetween. Although not limited thereto, the positions of the first coupling unit 106c-1 and the second coupling unit 106c-2 vary according to the frequency band for forming the notch characteristic, and the number of resonators included therebetween is also different. Can vary.

The case part 108 may be provided at an upper portion of the base plate 102. The case part 108 may be provided while covering the base plate 102, the resonator 104, and the notch filter part 106 on the base plate 102. The case part 108 may be provided in the form of a rectangular box with an empty inside and an open bottom. The case part 108 may be seated on the edge of the base plate 102. However, the present invention is not limited thereto, and the base plate 102 may be inserted into the case part 108.

The base plate 102 may be combined with the case part 108 to form the bottom surface of the high frequency filter 100. The case unit 108 may serve as a cavity of the high frequency filter 100. That is, the resonator 104 in the high frequency filter 100 may be provided in a structure surrounded by the base plate 102 and the case portion 108.

The partition wall 121 may be provided inside the case part 108. The partition wall 121 may be provided between the resonator 104 and the resonator 104 in the case unit 108. The partition wall 121 may be provided from one inner side surface of the case unit 108 toward the other inner side surface. That is, the partition wall 121 may be provided along the width direction of the case portion 108 inside the case portion 108. The partition wall 121 may adjust electrical coupling between the resonator 104 and the resonator 104. Here, although the partition wall 121 is illustrated as being provided from one inner side surface of the case portion 108 to the other inner side surface, the present invention is not limited thereto, and the partition wall 121 is spaced apart from the other inner side surface of the case portion 108. It may be.

The case part 108 and the partition wall 121 may be made of a conductive material. In an exemplary embodiment, the case portion 108 and the partition wall 121 may be integrally provided through a metal injection molding (MIM) technique. However, the present invention is not limited thereto, and the case part 108 and the partition wall 121 may be separately manufactured and then combined.

The partition wall 121 may be combined with the partition wall coupling portion 102a provided in the base plate 102. In an exemplary embodiment, the partition wall coupling portion 102a may be provided along the width direction of the base plate 102 on the upper surface of the base plate 102. The partition coupling portion 102a may be provided in a form in which a pair of bars are spaced apart from each other by a predetermined interval. An interval between the pair of bars may correspond to the thickness of the partition wall 121.

The partition wall 121 may be inserted into and coupled to the spaced space of the pair of bars of the partition wall coupling part 102a. On the other hand, the main body support portion 106b may be provided at a position corresponding to the partition wall coupling portion 102a. In more detail, the coupling groove 106b-2 of the main body support portion 106b may be provided to correspond to the partition wall coupling portion 102a.

In this case, the partition wall 121 may be inserted into and coupled to the coupling groove 106b-2 while being coupled with the partition wall coupling portion 102a. A stepped groove 121a corresponding to the height of the coupling groove 106b-2 may be provided in the partition wall 121 corresponding to the main body support 106b.

In this way, as the partition wall 121 of the case portion 108 is fitted into the engaging groove 106b-2 of the main body support portion 106b, the notch filter portion 106 is formed on the base plate at the upper portion of the base plate 102. And can be supported spaced apart from the 102.

The tuning unit 123 may be provided on the upper surface of the case unit 108. A plurality of tuning units 123 may be provided on the upper surface of the case unit 108 to be spaced apart from each other. 5 is a cross-sectional view showing a tuning unit 123 according to an embodiment of the present invention. 5A is a diagram illustrating a state before tuning of the tuning unit 123, and FIG. 5B is a diagram illustrating a state after tuning of the tuning unit 123. In FIG. 5B, a state in which the second recesses 123a-2 are pressed and tuned is illustrated as an example.

Referring to FIG. 5, the tuning unit 123 may be provided to have a thickness thinner than the top surface of the case unit 108. That is, when the upper surface of the case unit 108 is formed of the first thickness T1, the tuning unit 123 may be formed of a second thickness T2 that is thinner than the first thickness T1. In this way, by forming the tuning unit 123 thinner than the upper surface of the case unit 108, when the tuning unit 123 is pressed from the top, the tuning unit 123 is easily pressed down to affect other parts. Will not give.

The tuning unit 123 may include one or more recesses 123a. The recess 123a may be provided recessed downward based on the upper surface of the case part 108. In an exemplary embodiment, the tuning unit 123 may be formed in a circular or elliptical shape, but is not limited thereto. The recess 123a may include a first recess 123a-1 and a second recess 123a-2. The first concave portion 123a-1 may be provided along an edge of the tuning unit 123. The second concave portion 123a-2 may be provided at the center of the tuning unit 123. The first recess 123a-1 and the second recess 123a-2 may have different depths. In an exemplary embodiment, the first concave portion 12a-1 may be provided to be deeper than the second concave portion 123a-2. However, the present invention is not limited thereto, and the first recess 123a-1 and the second recess 123a-2 may have the same depth.

Here, the tuning part 123 may further include a convex part 123b connecting the first concave part 123a-1 and the second concave part 123a-2. The convex portion 123b is formed in a convex shape, but may be provided at a height equal to or less than an upper surface of the case portion 108. The tuning unit 123 may have a structure in which at least one concave portion 123a and the convex portion 123b are repeated.

As described above, the tuning unit 123 is formed to have a thickness thinner than the upper surface of the case unit 108 and includes one or more recesses 123a to press the tuning unit 123 from the top to lower the tuning unit 123. Press to tune, it is possible to fine tune the tuning by pressing a number of points in one tuning unit 123. In addition, by adjusting the force to press the tuning unit 123 by pressing the tuning unit 123 to tune, it is possible to easily control the tuning by adjusting the degree that the tuning unit 123 is pressed down.

The tuning unit 123 may include a first tuning unit 123-1 and a second tuning unit 123-2. The first tuning unit 123-1 may be provided at positions corresponding to the resonators 104 on the upper surface of the case unit 108, respectively. That is, the first tuning unit 123-1 may be provided to be positioned above the respective resonators 104. Here, by adjusting the degree of pressing the first tuning unit 123-1 from above, it is possible to adjust the distance between the first tuning unit 123-1 and the resonator 104, through which the resonance of the resonator 104 You can tune the frequency.

The second tuning unit 123-2 may be positioned between the resonator 104 and the resonator 104 on the upper surface of the case unit 108. Since the first tuning unit 123-1 is positioned above each resonator 104, the second tuning unit 123-2 may be located between the first tuning units 123-1. Here, by adjusting the degree of pressing the second tuning unit 123-1 from the top, it is possible to adjust the degree of pressing down the second tuning unit 123-1, the electrical coupling between the resonators 104 The amount of ring can be adjusted.

As such, the tuning unit 123 adjusts the distance between the resonators 104 through the first tuning unit 123-1 and the coupling between the resonators 104 through the second tuning unit 123-2. One or more of the resonance frequencies of the resonators 104 may be tuned.

According to the disclosed embodiment, the base plate 102 and the resonator 104 are integrally formed by the MIM method, the notch filter part 106 is formed by the MIM method, and the case part 108 and the partition wall 121 are formed. By integrally forming with the MIM technique, there is no restriction on bending or bending, and the product can be manufactured at once, thereby increasing design freedom. In addition, since the multiple booms can be molded into one, the number of parts can be reduced, thereby minimizing the characteristic variation due to the assembly between the parts.

6 is a graph showing the S parameter of the high frequency filter according to an embodiment of the present invention. Here, it was shown that the frequency band used for the high frequency filter 100 is 3.6 to 3.7 GHz.

Referring to FIG. 6, it can be seen that the high frequency filter 100 exhibits a notch characteristic in a band adjacent to the 3.6 GHz and 3.7 GHz bands, which are used frequency bands. This is a result of the notch filter unit 106 showing the notch characteristic in the vicinity of the use frequency band of the high frequency filter 100. Through this, the high frequency filter 100 may prevent interference with signals of adjacent frequency bands.

7 is a view showing a tuning device of a high frequency filter according to an embodiment of the present invention.

Referring to FIG. 7, the tuning device 200 of the high frequency filter may include a base panel 202, an insert guide 204, and a tuning controller 206. In the disclosed embodiment, tuning the high frequency filter 100 illustrated in FIGS. 1 to 5 will be described as an example, but the present invention is not limited thereto, and other than the high frequency filter illustrated in FIGS. Of course, it can be applied to the high frequency filter of the shape and structure.

The base panel 202 is a portion where the high frequency filter 100 is seated for frequency tuning. In an exemplary embodiment, the base panel 202 may be provided in a flat plate shape. The high frequency filter 100 may be mounted on the top surface of the base panel 202.

The insert guide 204 may guide the vertical movement of the tuning control unit 206 while fixing the tuning control unit 206. In an exemplary embodiment, the insert guide 204 may include a first fixing portion 204a, a second fixing portion 204b, and a guide portion 204c.

The first fixing part 204a may be fixed to the base panel 202 on one side of the upper surface of the base panel 202. For example, the first fixing part 204a may be vertically connected to the base panel 202, but the shape is not limited thereto. The first fixing part 204a may be provided higher than the height of the high frequency filter 100.

The second fixing part 204b may be fixed to the base panel 202 on the other side of the upper surface of the base panel 202. For example, the second fixing part 204b may be vertically connected to the base panel 202, but the shape is not limited thereto. The second fixing part 204b may be provided at the same height as the first fixing part 204a. Here, the high frequency filter 100 may be located between the first fixing part 204a and the second fixing part 204b.

The guide part 204c may be provided by connecting the end of the first fixing part 204a and the end of the second fixing part 204b. The guide part 204c may be provided on the high frequency filter 100. The tuning controller 206 may be coupled to the guide unit 204c. In the guide portion 204c, the tuning adjustment unit 206 may be coupled to enable vertical movement. In an exemplary embodiment, the guide part 204c may be provided with a tuning adjusting part insertion hole 204c-1 into which the tuning adjusting part 206 is inserted.

Here, the tuning adjustment unit 206 may be screwed to the tuning adjustment unit insertion hole 204c-1. That is, a first thread may be provided on an outer surface of the tuning adjustment unit 206, and a second thread corresponding to the first thread may be provided on an inner surface of the tuning adjustment unit insertion hole 204c-1. Accordingly, the tuning adjustment unit 206 can maintain the state coupled with the guide unit 204c while moving up and down along the tuning adjustment unit insertion hole 204c-1.

The tuning controller 206 may include a first tuning controller 206-1 and a second tuning controller 206-2. The first tuning controller 206-1 may be provided at a position corresponding to the first tuning unit 123-1 of the high frequency filter 100. The first tuning controller 206-1 may press the first tuning unit 123-1 while moving from the top of the first tuning unit 123-1 to the bottom.

That is, the first tuning controller 206-1 may be pressed in the clockwise direction by slightly moving the first tuning controller 206-1 downward. At this time, the degree in which the first tuning unit 123-1 stretches down is adjusted according to the pressure of the first tuning control unit 206-1. As a result, the distance between the first tuning unit 123-1 and the resonator 104 can be adjusted.

The second tuning controller 206-2 may be provided at a position corresponding to the second tuning unit 123-2 of the high frequency filter 100. The second tuning adjusting unit 206-2 may press the second tuning unit 123-2 while moving from the top of the second tuning unit 123-2 to the bottom.

That is, the second tuning controller 206-2 may be pressed clockwise by gradually moving the second tuning controller 206-2 downward while turning the second tuning controller 206-2 clockwise. At this time, the degree in which the second tuning unit 123-2 stretches down is adjusted according to the pressure of the second tuning adjusting unit 206-2. As a result, the amount of electrical coupling between the second tuning unit 123-2 and the adjacent resonators 104 can be adjusted.

Meanwhile, a first connector 211 and a second connector 213 may be provided on the bottom surface of the base panel 202. The first connector 211 may be electrically connected to the input terminal 111 of the high frequency filter 100 at the bottom surface of the base panel 202. For example, the terminal portion of the first connector 211 may be electrically connected to the input terminal portion 111 through the base panel 202.

The second connector 213 may be electrically connected to the output terminal 113 of the high frequency filter 100 at the bottom surface of the base panel 202. For example, the terminal portion of the second connector 213 may be electrically connected to the output terminal portion 113 through the base panel 202.

The first connector 211 and the second connector 213 may be electrically connected to a network analyzer (not shown). Here, frequency tuning may be performed while checking the resonant frequency of the high frequency filter 100 through a network analyzer (not shown). A lower portion of the base panel 202 may be provided with a stand 215 to space the base panel 202 at a predetermined distance from the ground and to support the base panel 202. It is easy to electrically connect the first connector 211 and the second connector 213 to a network analyzer (not shown) through the stand 215.

8 is a view showing a tuning device of a high frequency filter according to another embodiment of the present invention. Here, the parts that differ from the embodiment shown in FIG. 7 will be mainly described.

Referring to FIG. 8, the tuning device 300 of the high frequency filter may include a base panel 302, a tuning adjustment jig 304, a tuning controller 306, and a rotation driver 308. In the disclosed embodiment, tuning the high frequency filter 100 illustrated in FIGS. 1 to 5 will be described as an example, but the present invention is not limited thereto, and other than the high frequency filter illustrated in FIGS. Of course, it can be applied to the high frequency filter of the shape and structure.

The base panel 302 is a portion where the high frequency filter 100 is seated for frequency tuning. Here, the high frequency filter 100 may be mounted on the upper surface of the base panel 302. The lower surface of the base panel 302 may be provided with a connector (not shown) for electrically connecting the high frequency filter 100 to a network analyzer (not shown).

The tuning adjustment jig 304 may be provided on the high frequency filter 100. The tuning adjustment jig 304 may be provided to be movable on the X axis and the Y axis. That is, the tuning adjustment jig 304 may be connected to a jig moving member (not shown) and provided to be movable on the X axis and the Y axis through the jig moving member (not shown). The tuning adjustment jig 304 may include a first jig frame 304a, a second jig frame 304b, and a connection frame 304c.

The first jig frame 304a may be provided on the high frequency filter 100. The first jig frame 304a may be provided in parallel with the base panel 302. The tuning controller 306 may be coupled to the first jig frame 304a. In an exemplary embodiment, the first jig frame 304a may be provided with a tuning control unit insertion hole 304a-1 through which the tuning control unit 306 is inserted.

The second jig frame 304b may be provided on the first jig frame 304a. The second jig frame 304b may be provided in parallel with the first jig frame 304a. An upper end of the second jig frame 304b may be connected to a jig moving member (not shown).

The connection frame 304c may be provided by connecting the rear end of the first jig frame 304a and the lower end of the second jig frame 304b.

The tuning adjustment unit 306 may be provided to be coupled to the tuning adjustment jig 304 to move up and down. In an exemplary embodiment, the tuning adjustment unit 306 may be screwed into the tuning adjustment insertion hole 304a-1. That is, a first screw thread may be provided on an outer surface of the tuning controller 306, and a second screw thread corresponding to the first screw thread may be provided on an inner surface of the tuning controller insertion hole 304a-1. An upper end of the tuning controller 306 may be connected to the second jig frame 304b.

The rotation driver 308 may rotate the tuning controller 306 in a first direction (eg, clockwise) and in a second direction (eg, counterclockwise) opposite to the first direction. As the tuning control unit 306 is rotated in the first direction or the second direction, the tuning control unit 306 moves up and down while being coupled to the tuning control jig 304.

The rotation drive 308 may include a first gear 308a, a second gear 308b, and a motor 308c. The first gear 308a may be provided in the tuning controller 306. The first gear 308a may be provided on an outer surface of the tuning controller 306 positioned between the first jig frame 304a and the second jig frame 304b. The second gear 308b may be provided at one side of the first gear 308a. The second gear 308b may be provided to engage the first gear 308a.

The motor 308c may be provided to rotate the second gear 308b. The motor 308c may rotate the second gear 308b in the first direction or the second direction according to the input control signal. In an exemplary embodiment, the motor 308c may be a stepper motor.

Here, the tuning control unit 306 may be positioned on the upper part of the tuning unit 123 to perform the frequency tuning by moving the tuning adjustment jig 304 on the X and Y axes. The tuning controller 306 may be rotated in the first direction, for example, through the rotation driver 308 to move the tuning controller 306 downward. At this time, by adjusting the rotational speed of the tuning control unit 306 can adjust the degree to which the tuning control unit 306 presses the tuning unit 123, thereby adjusting the degree that the tuning unit 123 is stretched down It can be adjusted.

For example, when the tuning controller 306 presses the first tuning unit 123-1, the first tuning unit 123-1 increases downward by adjusting the degree of compression of the tuning adjusting unit 306. The degree of loss can be adjusted, and thus the distance between the first tuning unit 123-1 and the resonator 104 can be adjusted.

In addition, when the tuning adjustment unit 306 presses the second tuning unit 123-2, the degree to which the second tuning unit 123-2 stretches down by adjusting the pressing degree of the tuning adjustment unit 306. It is possible to adjust the, thereby adjusting the amount of electrical coupling between the second tuning unit 123-2 and the adjacent resonators 104.

According to the disclosed embodiment, since the tuning part 123 is zigzag pressed from the upper part to the lower part through the tuning adjusting part 306, frequency tuning is performed without affecting parts other than the part pressed by the tuning part 123. Will be able to perform

9 is a view showing an automated tuning system of a high frequency filter according to an embodiment of the present invention.

Referring to FIG. 9, the automated tuning system 400 of the high frequency filter may include a tuning device 402, a measuring device 404, and a control device 406.

The tuning device 402 is a device for tuning the high frequency filter 100. In an exemplary embodiment, the tuning device 402 may be the tuning device 300 shown in FIG. 8, but is not limited thereto. The tuning device 402 may be provided to press the tuning unit 123 of the high frequency filter 100 under the control of the control device 406. The tuning device 402 may be provided to be movable in three axes (X-axis, Y-axis, Z-axis).

The measuring device 404 may measure the performance of the high frequency filter 100. For example, the measuring device 404 may measure the resonance frequency (or S parameter) of the signal output from the high frequency filter 100. The measuring device 404 may be electrically connected to the input terminal 111 and the output terminal 113 of the high frequency filter 100. The measuring device 404 can measure the performance of the high frequency filter 100 tuned by the tuning device 402.

The control device 406 can control the tuning device 402. The control device 406 may tune the high frequency filter 100 by controlling the tuning device 402 until the performance of the high frequency filter 100 measured by the measuring device 404 satisfies a preset condition. That is, the control device 406 controls to press the one or more tuning units 123 of the high frequency filter 100 while moving the tuning device 402 until the performance of the high frequency filter 100 satisfies a preset condition. Can be.

In the disclosed embodiment, it is possible to easily tune the resonant frequency of the high frequency filter 100 through the automated tuning system 400, thereby shortening the manufacturing time of the high frequency filter to reduce the cost and mass production, The cost of tuning the high frequency filter can be reduced. That is, in the past, the tuning of the high frequency filter was performed manually by a skilled worker. In this case, a lot of time and cost are consumed to increase the cost and increase the product production time. The cost and time of the tuning work can be minimized.

Although exemplary embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

100: high frequency filter
102: base plate
102a: bulkhead joint
104: resonator
104a: connection
104b: frequency control unit
106: notch filter part
106a: main body
106a-1: Coupling protrusion
106b: main body support
106b-1: Insertion Hole
106b-2: Coupling Groove
106c: coupling part
106c-1: first coupling part
106c-2: second coupling part
108: case part
111: input terminal portion
113: output terminal section
121: bulkhead
121a: step groove
123: tuning unit
123a: concave
123a-1: first recessed portion
123a-2: second recess
123b: convex portion
123-1: first tuning part
123-2: second tuning unit
200, 300: tuning device
202, 302: base panel
204: Insert guide
204a: first fixing portion
204b: second fixing part
204c: guide part
204c-1: Tuning adjustment part insertion hole
206, 306: tuning adjustment
206-1: first tuning adjustment unit
206-2: second tuning adjustment unit
211: first connector
213: second connector
304: Tuning Adjustment Jig
304a: first jig frame
304a-1: Tuning adjustment part insertion hole
304b: second jig frame
304c: connecting frame
308: rotation drive
308a: first gear
308b: second gear
308c: motor
400: Automated Tuning System
402: tuning device
404: measuring device
406: control unit

Claims (14)

delete delete delete delete delete delete A base panel on which the high frequency filter is mounted;
A tuning controller provided to press the tuning unit of the high frequency filter on the upper portion of the high frequency filter;
A tuning adjustment jig provided on an upper portion of the high frequency filter and coupled to the tuning adjustment unit and movable to a first axis and a second axis perpendicular to the first axis; And
And a rotation driving unit configured to move the tuning control unit up and down in a state of being coupled to the tuning control jig.
The method according to claim 7,
The tuning adjustment jig includes a tuning adjustment unit insertion hole into which the tuning adjustment unit is inserted,
A first thread is provided on an outer surface of the tuning adjustment part, and a second thread corresponding to the first thread is provided on an inner surface of the tuning adjustment part insertion hole.
The tuning control unit is provided to maintain the state coupled with the tuning control jig while moving up and down along the tuning adjustment unit insertion hole, tuning apparatus of the high frequency filter.
The method according to claim 8,
The rotation drive unit,
A first gear provided on an outer surface of the tuning adjustment unit;
A second gear provided on one side of the first gear and engaged with the first gear; And
A motor for rotating the second gear in a first direction or in a second direction opposite to the first direction,
And the tuning control unit rotates by the rotation driving unit to move downward along the tuning adjustment unit insertion hole to press the tuning unit and to cause the tuning unit to be stretched downward.
The method according to claim 7,
The tuning adjustment jig,
A first jig frame provided in parallel with the base panel at an upper portion of the high frequency filter; And
A second jig frame provided in parallel with the first jig frame at an upper portion of the first jig frame,
The tuning adjustment unit,
The high frequency filter tuning device is inserted through the first jig frame, the screw is coupled to the first jig frame and provided to be movable up and down.
The method according to claim 10,
The rotation driving unit is provided in a space between the first jig frame and the second jig frame,
The rotation drive unit,
A first gear provided on an outer surface of the tuning adjustment unit;
A second gear provided on one side of the first gear and engaged with the first gear; And
A motor for rotating the second gear in a first direction or in a second direction opposite to the first direction,
And the tuning adjustment unit moves downward while rotating by the rotation driving unit to press the tuning unit, and to cause the tuning unit to extend downward.
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