WO2020060191A1

WO2020060191A1 - Filter for antenna and notch assembly thereof

Info

Publication number: WO2020060191A1
Application number: PCT/KR2019/012076
Authority: WO
Inventors: 정석우; 문형욱; 오현일
Original assignee: 주식회사 케이엠더블유
Priority date: 2018-09-21
Filing date: 2019-09-18
Publication date: 2020-03-26
Also published as: KR20240029009A

Abstract

The present invention relates to a filter for an antenna and a notch assembly thereof. Particularly, the present invention comprises: a notch assembly comprising a notch bar; and a filter body having a groove-shaped notch insertion part in which the notch assembly is fixedly inserted, wherein the notch assembly comprises: a tension fixing part disposed in the notch insertion part at the opposite side to the insertion direction so as to fix the notch body to the notch insertion part in a one-touch manner by an external force applied in the insertion direction; and a tolerance absorbing part for absorbing tolerance present in the notch body and the notch insertion part, in connection with the fixing force by the tension fixing part. Therefore, the present invention can provide advantages of significantly reducing the assembly time and easily absorbing assembly tolerance or environmental tolerance.

Description

Antenna filter and its notch assembly

The present invention relates to a filter for an antenna and its notch assembly (FILTER FOR ANTENNA AND NOTCH ASSEMBLY OF THE SAME), and more specifically, to prevent the notch assembly from being detached from the filter body, and at the same time, includes injection tolerance and processing tolerance The present invention relates to an antenna filter and a notch assembly that can easily absorb assembly tolerances.

The antenna filter may be configured as a notch filter to improve skirt characteristics while maintaining insertion loss. This is also called a Band Reject Wave Filter (BRF), which is defined as a filter that passes almost all frequency bands well and does not pass only frequencies in a specific band.

1 is a partial perspective view showing an example of application of a notch of an antenna filter according to the prior art.

The filter for an antenna according to the prior art includes a notch assembly coupled to a notch coupling portion provided in the filter body, as shown in FIG. 1.

More specifically, the notch assembly 20, a ring-shaped ring cover (Ring cover) 21 and a pair of notch bars (notch) extending outwardly coupled to each of the center holes at both ends of the ring cover 21 bar) (23).

The notch coupling portion of the filter body 10 is formed in the middle of the cover insertion portion 11 and the cover insertion portion 11 provided in a U-shape so that the outer circumferential surface of the ring cover 21 is inserted and locked Each of the outer peripheral surfaces of the cover 21 and the other side toward the upper portion includes a pair of molding support portions 13 formed to extend inside the cover insertion portion 11, respectively. Here, the inner surface of the cover insertion portion 11 may be formed in a shape corresponding to the lower portion of the molding insertion groove 22 of the ring cover 21, which will be described later.

On the other hand, on the outer circumferential surface of the ring cover 21, a molding insertion groove 22 in the form of an outer circumferential groove is formed so that a pair of molding support portions 13 are inserted and passed when inserted into the cover insertion portion 11.

One example of the filter for an antenna according to the prior art of such a configuration, as shown in FIG. 1, after inserting the notch assembly 20 so that the ring cover 21 is seated on the cover inserting portion 11, the notch In order to prevent the assembly 20 from escaping to the outside, epoxy molding is performed on the molding insertion groove 22 of the ring cover 21 exposed between the pair of molding supports 13 in the configuration of the notch coupling portion 20. .

On the other hand, although not shown in the drawing, as another known technique for preventing the separation of the notch assembly 20, the length of the dielectric for fixing the notch assembly 20 is extended to a predetermined length to contact the filter cover, and then the filter cover By this, it is possible to prevent departure.

However, as an example of the filter for an antenna according to the prior art shown in FIG. 1, since the notch assembly 20 must be waited for complete drying after epoxy molding, an increase in assembly time is caused. In addition, according to a known technique not shown to be designed to prevent separation by the filter cover, there is a problem in that the material cost is increased by extending the length of the dielectric.

The present invention has been made to solve the above technical problem, and an object thereof is to provide a filter for an antenna and a notch assembly thereof that can prevent the notch assembly from being detached from the filter body.

Another object of the present invention is to provide an antenna filter and a notch assembly thereof that can easily absorb assembly tolerances including injection tolerances and processing tolerances.

In addition, another object of the present invention is to provide a filter for an antenna and a notch assembly thereof that can easily absorb environmental tolerances due to thermal deformation due to an external environment in a high temperature or low temperature state.

One embodiment of the filter for an antenna according to the present invention includes a notch assembly including a notch bar and a filter body provided with a notch insertion portion in a groove shape so that the notch assembly is inserted and fixed, and the notch assembly includes the notch insertion It is provided on the side opposite to the insertion direction of the part, and the notch body coupled to the notch bar by an external force in the insertion direction is one-touch fixed to the notch insertion part and the tension fixing part interlocks with the fixing force of the tension fixing part to insert the notch body and the notch. And a tolerance absorbing portion that absorbs tolerances present in the portion.

Here, at least two or more cavities are formed to be recessed in the filter body, and the notch insertion portion is formed on a partition wall provided to partition the adjacent cavities, and may be formed to communicate a portion of the adjacent cavities.

In addition, the tension fixing unit may be provided with a pair of tension bars formed so that the mutual separation distance is gradually increased toward the opposite direction of the insertion direction.

In addition, on one side and the other side of the notch inserting portion, the locking portions at which the ends of the pair of tension bars are locked in opposite directions to the insertion direction may be provided.

In addition, the pair of tension bars may be formed of an elastic material that is integrally formed on the notch body but is deformed by an external force and then restored.

In addition, the tolerance absorbing portion may be formed to protrude in the insertion direction so as to be in close contact with the bottom portion of the notch insertion portion.

In addition, the tolerance absorbing portion may be formed to be rounded so as to be in elastic contact with the bottom of the notch insertion portion.

In addition, the notch body is provided to accommodate one side in the width direction and the other side in the width direction of the notch bar, respectively, and one side coupling body and the other side that are fixed to each other by a pair of connecting portions protruding toward the insertion direction and spaced apart from each other. Including a coupling body, the tolerance absorbing portion is formed on the one side coupling body and the other side coupling body, respectively, one end and the other end may be respectively connected to the pair of connecting portions.

In addition, the one side receiving body is provided with one side receiving groove in which the width direction one side of the notch bar is accommodated, the other side coupling body is provided with the other side receiving groove in which the other side in the width direction of the notch bar is accommodated, of the notch bar Some may be completely shielded by the notch body when the one side coupling body and the other side coupling body are mutually fixed by the pair of connecting portions.

In addition, the tolerance absorbing portion may be provided with an elastic material that is integrally formed on the notch body and is deformed by an external force and then restored.

One embodiment of the notch assembly of the filter for an antenna according to the present invention, at least two or more cavities are formed to be recessed, and a notch body detachably coupled to a notch insert formed in a partition wall provided to mutually partition adjacent cavities, A notch bar coupled to the notch body, provided on the opposite side of the insertion direction of the notch insertion portion, interlocks with the tension fixing portion and the tension fixing portion for one-touch fixing the notch body to the notch insertion portion by an external force in the insertion direction By including a tolerance absorbing portion for absorbing the tolerance present in the notch body and the notch insertion portion.

Here, the tension fixing portion may be provided with a pair of tension bars formed to gradually increase in mutual separation distance toward the opposite direction of the insertion direction, and may be provided with an elastic material that is deformed and restored by external force.

In addition, the tolerance absorbing portion is formed to protrude in the insertion direction so as to be in close contact with the bottom portion of the notch insertion portion, is formed to be rounded so as to be in elastic contact with the bottom portion of the notch insertion portion, to be provided by an elastic material that is deformed by an external force and then restored. You can.

According to an embodiment of the filter for an antenna and its notch assembly according to the present invention, it is possible to achieve various effects as follows.

First, since the notch assembly can be assembled in a one-touch manner to the cover insert, it has an effect of significantly shortening the assembly time.

Second, the tension locking portion of the notch assembly has an effect of preventing the notch assembly from being detached by being caught in the locking groove of the cover insertion portion.

Third, among the configuration of the notch assembly, it has an effect of easily absorbing assembly tolerances including injection tolerances and processing tolerances and environmental tolerances according to the external environment by the tolerance absorber.

1 is a partial perspective view showing an example of application of a notch of an antenna filter according to the prior art,

2 is a perspective view showing an embodiment of an antenna filter according to the present invention,

3 is a plan view of FIG. 2,

Figure 4 is an exploded perspective view of Figure 2,

5 is a perspective view showing a notch assembly in the configuration of FIG. 2,

Figure 6 is a front view showing the notch assembly of the configuration of Figure 2,

7 is an exploded perspective view of FIG. 5,

8A and 8B are cut-away perspective views taken along lines A-A and B-B of FIG. 5,

9A and 9B are cross-sectional views taken along lines C-C and D-D of FIG. 2,

10 is a partial cut-away perspective view taken along line C-D of FIG. 2 and an enlarged view thereof.

100: antenna filter 110: filter body

111:

notch insertion portion

113a, 113b: engaging portion

120: output unit 150: tuning screw

200: Notch assembly 205: Notch body

210: one side coupling body 211,221: tension fixing part

212,222: Connection 213,223: Connection projection

214,224: connecting groove 215,225: trim

216: one notch receiving groove 220: the other coupling body

226: notch receiving groove on the other side 230: tolerance absorbing part

240: Notch bar 241: One side body receiving groove

242: the other body receiving groove

Hereinafter, an embodiment of the filter for an antenna according to the present invention and its notch assembly according to the present invention will be described in detail with reference to exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible, even if they are displayed on different drawings. In addition, in describing the embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with the understanding of the embodiments of the present invention, detailed descriptions thereof will be omitted.

In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. In addition, unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Throughout the specification, when a part is 'included' or 'equipped' a component, this means that other components may be further included rather than excluded other components unless specifically stated to the contrary. .

2 is a perspective view showing an embodiment of an antenna filter according to the present invention, FIG. 3 is a plan view of FIG. 2, FIG. 4 is an exploded perspective view of FIG. 2, and FIG. 5 is a notch assembly of the configuration of FIG. 2 Fig. 6 is a front view showing the notch assembly in the configuration of Fig. 2, Fig. 7 is an exploded perspective view of Fig. 5, and Figs. 8A and 8B are cutaway perspective views taken along lines AA and BB of Fig. 5, 9A and 9B are cross-sectional views taken along lines CC and DD of FIG. 2, and FIG. 10 is a partially cut-away perspective view and an enlarged view taken along the CD line of FIG. 2.

One embodiment of the filter 100 for an antenna according to the present invention, as referenced in FIGS. 2 to 7, and a notch assembly 200 including a notch bar 240, The notch assembly 200 includes a filter body 110 in which a notch insertion portion 111 is provided in a groove shape so as to be inserted and fixed.

In the filter body 110, at least two or more cavities C, C1, C2 are formed to be recessed, as shown in FIG. 2, and partition walls provided to mutually partition adjacent cavities C, C1, C2 (Not shown) may be formed. Here, the cavities (C, C1, C2) may be a component provided to generate resonance in its own shape without the provision of a dielectric resonator element.

Cavities (C, C1, C2) provided with at least two or more are provided with a portion corresponding to the upper part of the drawing open, and although not shown in the drawing, a filter cover that shields the open surface of the cavities (C, C1, C2) May be provided. As shown in FIG. 1, a filter cover, as a tuning structure for tuning a filtering characteristic of a corresponding radio frequency filter, may be provided with a plurality of tuning screws 150 into which a head portion is fitted into a filter cover in which a predetermined hole is formed. have.

More specifically, as shown in FIGS. 2 and 3, the output portions 120 are respectively provided on the inner bottom surfaces of the two cavities C1 and C2, and the tuning screw 150 is provided through the cover surface of the filter cover. It is fastened to the upper side of the notch assembly 200 may be used to adjust the resonance characteristics.

The tuning screw 150 can adjust resonance characteristics (ie, center frequency) and coupling characteristics (ie, frequency band) per row by tightening or loosening by an operator.

As described above, the tuning screw 150 can be manually adjusted by an operator as described above, and receives a waveform output from a waveform analyzer (not shown) that analyzes and outputs a waveform of a radio frequency filter, thereby setting a preset reference waveform It can be provided to be automatically adjustable to match.

On the other hand, the notch assembly 200 is a configuration for improving insertion loss and skirt characteristics that are mentioned as important characteristics in the radio frequency filter. More specifically, the important characteristics of the radio frequency filter include insertion loss and skirt characteristic.

Here, the insertion loss means the power lost while the signal passes through the filter, and the skirt characteristic means the degree to which the pass band and the stop band of the filter are steep. In general, since the insertion loss and the skirt characteristic are in a trade-off relationship with each other according to the number of stages (order) of the filter, the higher the number of stages of the filter is, the better the skirt characteristic is but the insertion loss becomes worse.

The notch assembly 200 is used to improve the skirt characteristics of the filter without increasing the number of filters, and a method of forming a notch (attenuation pole) is mainly used, and the antenna filter 100 according to the present invention In one embodiment, the notch bar 240 to which the cross coupling method is applied corresponds to this.

The notch bar 240 may be formed of a metal workpiece, such as a metal rod that forms a capacitance coupling between resonating elements of two adjacent cavities C1 and C2 that are not circuitly continuous. In one embodiment of the present invention, the notch bar 240 is extended to the two cavities (C), respectively, but the tip is provided with a metal workpiece having a bent downward shape on the drawing.

In this notch bar 240, the notch body 205 of the notch assembly 200 is provided in the notch inserting portion 111 formed in a partition wall partitioning two cavities C adjacent to the notch body 205, which will be described later. It can be fixed by the inserted action.

Here, if the notch assembly 200 is fixed so that the tip end of the notch bar 240 is extended between the two cavities C1 and C2, the notch insertion portion 111 communicates the two cavities C1 and C2. Even though it may be formed of a 'through hole structure' penetrating the partition wall, such a through hole structure may have a problem that the fixing operation of the notch assembly 200 is not easy. Therefore, in one embodiment of the present invention, the top of the partition wall in the drawing is provided with a partially cut-out groove shape, and the notch assembly 200 is designed to be inserted and fixed from the open side to the notch inserting portion 111 side. .

The notch assembly 200 is moved downwardly in the drawing and inserted into the notch insertion portion 111. Here, in order to prevent confusion of understanding, a direction in which the notch assembly 200 is moved to be inserted into the notch insertion portion 111 is defined as an 'insertion direction', and the opposite direction is defined as an opposite direction (or departure from the insertion direction). Direction) '.

The notch assembly 200 may include a notch body 205 and a notch bar 240 fixed by the notch body 205, as referenced in FIG. 4.

The notch body 205 is provided with an insulating material for electrical isolation between the notch bar 240 and the notch insert 111, and serves as a medium for fixing the notch bar 240 to the notch insert 111. You can. Here, the notch body 205 may be provided with a dielectric material.

On the other hand, the notch body 205, as shown in FIGS. 5 and 6, one side notch receiving groove 216 is formed to accommodate a part of the width direction one side of the notch bar 240, protruding toward the insertion direction and mutually One side coupling body 210 having a pair of connecting portions 212 spaced apart, and the other side notch receiving groove 226 is formed to accommodate a part of the other side in the width direction of the notch bar 240, protruding toward the insertion direction, and spaced apart from each other It may include the other side of the coupling body 220 is formed with a pair of connections (222).

One side of the coupling body 210 and the other side of the coupling body 220, the width of one side portion of the notch bar 240, and the other side of the width direction is partially accommodated in one side notch receiving groove 216 and the other notch receiving groove 226 A pair of connecting

portions

212 and 222 may be combined while being combined with each other so as to be wrapped with.

Here, the mutual depth of one side notch accommodating groove 216 of the one side coupling body 210 and the other notch accommodating groove 226 of the other coupling body 220 is, after each notch bar 240 is completely inserted, one side It is preferable that the outer ends of the notch accommodating grooves 216 and the other notch accommodating grooves 226 are formed to a depth capable of mutual contact.

More specifically, as shown in FIGS. 7 to 8B, any one of the pair of connecting portions 212 formed on the one side coupling body 210 protrudes a predetermined length toward the other side coupling body 220 to protrude a predetermined length ( 213) may be provided, and a connection groove 214 formed to be recessed inward may be formed on the other of the pair of connection portions 212 formed on the coupling body 210 on one side.

Likewise, a connection groove 224 formed to be recessed inward is formed in one of the pair of connecting portions 222 formed on the other coupling body 220 so that the connecting projection 213 formed on the coupling body 210 is inserted , The other one of the pair of connecting portions 222 formed on the other coupling body 220, the connection projection protruding a predetermined distance toward the coupling body 210 to be inserted into the coupling groove 214 formed in the coupling body 210 on one side (Not shown) may be provided.

Here, the inner diameters of the connecting

grooves

214 and 224 respectively formed in the one side coupling body 210 and the other side coupling body 220 are formed smaller than the outer diameters of the connecting protrusions 213 formed to be substantially mutually coupled, and the one side coupling body 210 and When the other coupling body 220 is mutually coupled, the

connection protrusions

213 and 223 may be provided to be fixed to the

connection grooves

214 and 224 in a forced fit manner.

However, physically, if the inner diameter of the connecting

grooves

214 and 224 is smaller than the outer diameter of the connecting projection 213, the fitting engagement itself may not be possible, so that the interference fit as described above is easily combined, the one side coupling body 210 and the other side Cut

portions

215 and 225 may be provided, each of which is cut so that a portion of the connecting

portions

212 and 222 on which the connecting

grooves

214 and 224 of the coupling body 220 are formed is tipped outward toward the inlet side of the connecting

grooves

214 and 224.

Therefore, when the connecting

protrusions

213 and 223 are inserted into the connecting

grooves

214 and 224, the

fitting portions

215 and 225 are opened and restored by an external force such as an interference fitting force, so that the interference fitting can be completed. Therefore, when the mutual coupling between the coupling body 210 on one side and the coupling body 220 on the other side can be completed through a simple interference fitting method without a separate fastening member such as a fastening screw, the assembly time can be completed. It offers the advantage of being shortened.

On the other hand, one side body receiving groove 241 in which a part of the one side coupling body 210 is inserted and inserted is formed at one end in the width direction of the notch bar 240, and the other side coupling body is formed at the other end in the width direction of the notch bar 240. A body receiving groove 242 on the other side where a part of the 220 is inserted and received may be formed.

One side notch accommodating groove 216 and the other notch accommodating groove 226 formed in one side coupling body 210 and the other side coupling body 220 accommodate one side body receiving groove 241 and the other body formed in the notch bar 240 Notch bar so that a portion of the one side coupling body 210 and the other side coupling body 220 is accommodated in the groove 242, and at the same time, the other end portion in the width direction of the other side of the notch bar 240 is accommodated. An incision may be formed to have a cross section of an approximately 'c' shape penetrated in the longitudinal direction of 240.

Accordingly, when the

connection grooves

214 and 224 and the connection protrusions 213 of the one side coupling body 210 and the other side coupling body 220 are completely engaged with each other by an interference-fitting operation, the notch bars 240 are notched bars, respectively. It may be completely shielded by the notch body 205 that accommodates a portion of the 240.

Here, the depth of the one side body receiving groove 241 and the other side body receiving groove 242 is the depth that the one side coupling body 210 and the other side coupling body 220 coupled to each are engaged in the longitudinal direction of the notch bar 240 It is preferably formed of. That is, the one side coupling body 210 is inserted into one side body receiving groove 241, the other side coupling body 220 is inserted into the other side body receiving groove 242, respectively, in the longitudinal direction of the notch bar 240 By being caught, the flow can be prevented.

As described above, in one embodiment of the filter 100 for an antenna according to the present invention, the notch body 205 is separately formed into one coupling body 210 and the other coupling body 220, and then a single notch bar 240 ) Is configured to be inserted and fixed therebetween, so that it is easy to replace and apply notch bars 240 of various lengths to adjust the insertion loss and skirt characteristics between the two cavities (C).

Meanwhile, the notch body 205 is provided on the side opposite to the insertion direction of the notch insertion portion 111, as shown in FIGS. 6 to 10, the notch body 205 by an external force in the insertion direction

Tension fixing parts

211 and 221 for one-touch fixing to 111, and tolerance absorbing portions 230 absorbing tolerances present in the notch body 205 and the notch inserting portion 111 in conjunction with the fixing force of the tension fixing portions 211 and 221 ).

The

tension fixing portions

211 and 221 are fixed to the

locking portions

113a and 113b formed in the notch inserting portion 111 to be described later, while preventing the notch body 205 from escaping to the outside, and the notch body 205 It serves to continuously adhere to the bottom side of the notch insertion portion 111.

The

tension fixing parts

211 and 221 may be provided with a pair of tension bars formed so that the mutual separation distance becomes larger as it goes in the opposite direction of the insertion direction. Here, the pair of tension bars may be formed of an elastic material that is integrally formed on the notch body 205 but is deformed and restored by external force.

The

tension fixing portions

211 and 221 provided with a pair of tension bars may include one tension bar 211 formed on one coupling body 210 and the other tension bar 221 formed on the other coupling body 220. .

In more detail, the

tension fixing portions

211 and 221 provided with a pair of tension bars are integrally formed at the upper end of the notch body 205 and extended upward, but are formed to increase mutually separated distances toward the upper side. You can.

Meanwhile, as shown in FIG. 7A, on one side and the other side of the notch insertion portion 111, each of the front ends of the

tension fixing portions

211 and 221 provided with a pair of tension bars is locked in a direction opposite to the insertion direction ( 113a, 113b) may be provided, respectively. The locking

portions

113a and 113b may be provided in a protrusion shape protruding a predetermined length from the upper end portion of the notch insertion portion 111 to the inside of the notch insertion portion 111, respectively.

Here, the separation distance (D2) of each outer end of the tip of the pair of tension bars constituting the tension fixing portion (211,221), as shown in Figure 7a, one side locking portion formed in the notch insertion section 111 It may be formed longer than the separation distance (D1) between the inner surface of the inner side of the (113a) and the other side of the locking portion (113a).

However, each separation distance of the lower portion of the pair of tension bars can be easily inserted through one side of the locking portion 113a and the other side of the locking portion 113b, the inner side surface of the one side locking portion 113a and the other side locking portion ( It may be formed smaller than the separation distance between the inner surface of 113b).

In addition, when the notch assembly 200 is inserted into the notch inserting portion 111, the upper end portion of the drawing of the one side locking portion 113a and the other side locking portion 113b is easily provided with each outer surface of each pair of tension bars. The inclined portion 113 ′ formed to be inclined downward toward the insertion direction may be formed to be moved in a slip manner.

Therefore, when the notch assembly 200 is inserted and fixed to the notch insertion portion 111, the outer side of the tip of the pair of tension bars is caught on one side before the notch body 205 is seated at the bottom of the notch insertion portion 111. After riding over the inclined portion 113 'of the portion 113a and the other locking portion 113b, the outside of the notch assembly 200 is fixed to the lower surfaces of the one locking portion 113a and the other locking portion 113b. It is possible to prevent the furnace from leaving.

On the other hand, the tolerance absorbing unit 230 easily absorbs environmental tolerances due to external environments such as heat and assembly tolerances including injection tolerances and processing tolerances that occur in the process of manufacturing the notch assembly 200 by an injection process. Plays a role.

More specifically, the tolerance absorbing portion 230 may be formed to protrude in the insertion direction from the lower surface of the notch body 205 to be in close contact with the bottom of the notch inserting portion 111, as shown in FIGS. 5 and 9B. have.

In addition, the tolerance absorbing portion 230 may be formed to be rounded to elastically contact the bottom portion of the notch insertion portion 111. To this end, the tolerance absorbing portion 230 may be formed of an elastic material that is integrally formed on the notch body 205 but is deformed by an external force and then restored.

Here, the tolerance absorbing part 230 may be respectively provided so that one end and the other end are connected to a pair of connecting

parts

212 and 222 protruding in an insertion direction to each of the bottom parts of the one side coupling body 210 and the other side coupling body 220. have. Accordingly, two tolerance absorbing portions 230 may be respectively formed in the single notch body 205.

On the other hand, in one embodiment of the antenna filter 100 according to the present invention, as shown in Figure 9a, the top of the tension fixing portion (211,221) (that is, the tip of the tension bar) and the tolerance absorbing portion 230 The vertical height D4 between the lower ends is more than the vertical height D3 between the lower surface of the locking

portions

113a and 113b of the notch inserting portion 111 and the bottom surface forming the bottom portion of the notching inserting portion 111. It is preferably formed large. Therefore, when the notch assembly 200 is inserted into the notch insertion portion 111 and fixed, it is possible to absorb the above-described tolerance by the amount of up and down deformation of the tolerance absorbing portion 230.

The operation of the antenna filter 100 according to the present invention configured as described above will be briefly described with reference to the accompanying drawings (in particular, FIG. 10).

First, when the notch assembly 200 is fixed to the notch insertion portion 111 by moving in the insertion direction, a pair of tension bars constituting the

tension fixing portions

211 and 221 are provided in the notch insertion portion 111 ( Take the 113a, 113b) and move downward, and then the engaging

portions

113a, 113b are caught in the opposite direction of the insertion direction.

Therefore, in one embodiment 100 of the present invention, there is no need for a separate epoxy molding process to prevent departure from the outside of the notch assembly 200, so that the assembly time delayed during the time for which the conventional epoxy molding is cured is greatly increased. It can be shortened.

On the other hand, when the notch assembly 200 is fully engaged by the

tension fixing parts

211 and 221 to the notch insertion part 111, as shown in FIG. 8, the tolerance absorbing part 230 of the notch insertion part 111 As it is in close contact with the bottom portion, it is possible to absorb various kinds of tolerances by an action that is elastically deformed by an external force such as an assembly force provided from the outside.

In addition, it is of course possible to adjust the resonance characteristics through the tuning screws 150 provided on the upper side of the drawing to adjust the insertion loss and skirt characteristics between the two cavities C1 and C2.

In addition, even when the resonance characteristics are adjusted by separating the pre-assembled notch bar 240 from the notch body 205 and replacing it with another notch bar 240 having a different length, one side coupling body 210 and the other side coupling The

tension fixing portions

211 and 221 provided on the body 220 are respectively pressed adjacent to separate from the locking

portions

113a and 113b of the notch inserting portion 111, and then one side coupling body 210 and the other side coupling body 220 are attached. Since it can be separated and assembled for replacement, it provides an excellent workability.

In the above, an embodiment of the filter for an antenna according to the present invention and its notch assembly has been described in detail with reference to the accompanying drawings. However, the embodiments of the present invention are not necessarily limited to the above-described embodiments, and it will be understood that various modifications and equivalent implementations by those skilled in the art to which the present invention pertains are possible. . Therefore, the true scope of the present invention will be defined by the claims below.

The present invention provides a filter for an antenna and a notch assembly thereof that can prevent the notch assembly from being detached from the filter body.

Claims

A notch assembly including a notch bar; And

A filter body provided with a notch insertion portion in a groove shape so that the notch assembly is inserted and fixed; Including,

The notch assembly,

A tension fixing portion provided on the side opposite to the insertion direction of the notch insertion portion and one-touch fixing the notch body to which the notch bar is coupled by an external force in the insertion direction; And

A tolerance absorbing portion that absorbs tolerances present in the notch body and the notch insertion portion in connection with the fixing force of the tension fixing portion; A filter for an antenna comprising a.
The method according to claim 1,

At least two cavities are recessed in the filter body,

The notch insertion portion is formed on a partition wall provided to partition the adjacent cavities, the filter for the antenna formed to communicate a portion of the adjacent cavities.
The method according to claim 1,

The tension fixing portion, a filter for an antenna provided with a pair of tension bar formed so that the mutual separation distance is gradually increased toward the opposite direction of the insertion direction.
The method according to claim 3,

On one side and the other side of the notch insertion portion, the ends of the pair of tension bars are provided with locking portions, respectively, which are engaged in opposite directions in the insertion direction, the filter for the antenna.
The method according to claim 3,

The pair of tension bars are formed integrally with the notch body, and are provided with an elastic material that is deformed and restored by an external force, thereby providing an antenna filter.
The method according to claim 1,

The tolerance absorbing portion, the filter for the antenna formed protruding in the insertion direction so as to be in close contact with the bottom of the notch insertion portion.
The method according to claim 6,

The tolerance absorbing portion,

A filter for an antenna formed to be round so as to make elastic contact with the bottom of the notch insert.
The method according to claim 6,

The notch body is provided to accommodate one side in the width direction and the other side in the width direction of the notch bar, and the one side coupling body and the other coupling body fixed to each other by a pair of connecting portions protruding in the insertion direction and spaced apart from each other. Including,

The tolerance absorbing unit is formed on the one side coupling body and the other side coupling body, and one end and the other end are respectively connected to the pair of connecting portions, the antenna filter.
The method according to claim 8,

The one side coupling body is provided with one side receiving groove in which the width direction one side of the notch bar is accommodated, and the other side coupling body is provided with the other side receiving groove in which the other side in the width direction of the notch bar is accommodated,

A part of the notch bar is a filter for an antenna that is completely shielded by the notch body when the one side coupling body and the other side coupling body are mutually fixed by the pair of connecting portions.
The method according to claim 1,

The tolerance absorbing portion, the filter for the antenna is formed of an elastic material that is formed integrally with the notch body but is deformed and restored by external force.
A notch body which is formed to be recessed at least two cavities, and is detachably coupled to a notch insert formed in a partition wall provided to partition adjacent cavities to each other;

A notch bar coupled to the notch body;

A tension fixing portion provided on the side opposite to the insertion direction of the notch insertion portion to fix the notch body to the notch insertion portion by one touch by an external force in the insertion direction; And

A tolerance absorbing portion that absorbs tolerances present in the notch body and the notch insertion portion in connection with the fixing force of the tension fixing portion; The notch assembly of the filter for an antenna comprising a.
The method according to claim 11,

The tension fixing part is provided with a pair of tension bars formed so that the mutual separation distance is gradually increased as it goes in the opposite direction of the insertion direction, and is provided with an elastic material that is deformed and restored by external force, and notch assembly of the filter for an antenna .
The method according to claim 11,

The tolerance absorbing portion is formed to protrude in the insertion direction so as to be in close contact with the bottom of the notch insertion portion, is formed to be rounded so as to be in elastic contact with the bottom of the notch insertion portion, is provided with an elastic material that is deformed by an external force and is restored, the antenna Dragon filter notch assembly.
The method according to claim 11,

The notch body is provided to accommodate one side in the width direction and the other side in the width direction of the notch bar, and the one side coupling body and the other coupling body fixed to each other by a pair of connecting portions protruding in the insertion direction and spaced apart from each other. Including,

The tolerance absorbing portion is formed on the one side coupling body and the other side coupling body, and one end and the other end are respectively connected to the pair of connecting portions, the notch assembly of the filter for an antenna.
The method according to claim 14,

The one side coupling body is provided with one side receiving groove in which the width direction one side of the notch bar is accommodated, and the other side coupling body is provided with the other side receiving groove in which the other side in the width direction of the notch bar is accommodated,

The notch assembly of the filter for an antenna, wherein a part of the notch bar is completely shielded by the notch body when the one side coupling body and the other side coupling body are mutually fixed by the pair of connecting portions.