KR20240029009A - Filter for antenna and notch assembly of the same - Google Patents

Abstract

The present invention relates to a filter for an antenna and a notch assembly thereof. In particular, the present invention relates to a notch assembly including a notch bar, and a filter body having a notch insertion portion in a groove shape so that the notch assembly is inserted and fixed, the notch assembly comprising: A tension fixing part provided on the opposite side of the insertion direction of the notch insertion part and one-touch fixing the notch body to the notch insertion part by an external force in the insertion direction, and the notch body and the notch insertion part in conjunction with the fixing force of the tension fixing part. By including a tolerance absorbing part that absorbs the tolerance existing in, not only can the assembly time be greatly shortened, but it also provides the advantage of easily absorbing the assembly tolerance or environmental tolerance.

Description

Filter for antenna and its notch assembly {FILTER FOR ANTENNA AND NOTCH ASSEMBLY OF THE SAME}

The present invention relates to a filter for an antenna and its notch assembly, and more specifically, to an antenna that prevents the notch assembly from being separated from the filter body and can easily absorb assembly tolerances, including injection tolerances and processing tolerances. It relates to a filter and its notch assembly.

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 type of filter that passes almost all frequency bands well but does not pass only frequencies in a specific band.

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

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

More specifically, the notch assembly 20 includes a ring-shaped ring cover 21 and a pair of notch bars (notch) that are respectively coupled to center holes at both ends of the ring cover 21 and extend outward. bar) (23).

The notch coupling part of the filter body 10 is formed in the middle of the cover insertion part 11 and the cover insertion part 11, which is provided in a U shape so that the outer peripheral surface of the ring cover 21 is inserted and caught. It includes a pair of molding support portions 13 extending inside the cover insertion portion 11 toward one side of the outer peripheral surface of the cover 21 and the upper portion of the other side, respectively. Here, the inner surface of the cover insertion portion 11 may be formed in a shape that roughly corresponds to the lower side of the molding insertion groove 22 of the ring cover 21, which will be described later.

Meanwhile, a molding insertion groove 22 in the form of an outer groove is formed on the outer peripheral surface of the ring cover 21 so that a pair of molding support portions 13 are inserted and pass through when inserted into the cover insertion portion 11.

In an example of a filter for an antenna according to the prior art having such a configuration, as shown in FIG. 1, the notch assembly 20 is inserted and mounted so that the ring cover 21 is seated on the cover insertion portion 11, and then the notch assembly 20 is inserted and mounted according to the prior art. In order to prevent the assembly 20 from leaving 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 of the notch coupling portion 20. .

Meanwhile, although not shown in the drawing, as another known technique for preventing the notch assembly 20 from being separated, the length of the dielectric for fixing the notch assembly 20 is extended to a predetermined length to reach the filter cover, and then the filter cover is extended. This can prevent departure.

However, in the example of the filter for an antenna according to the prior art shown in FIG. 1, the notch assembly 20 has to be epoxy molded and then waited for complete drying, resulting in the inconvenience of increased assembly time. In addition, according to the known technology (not shown) designed to prevent separation by the filter cover, there is a problem that the material cost increases due to the extension of the length of the dielectric.

The present invention was made to solve the above-described technical problem, and its purpose is to provide a filter for an antenna and a notch assembly thereof that can prevent the notch assembly from being separated from the filter body.

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

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 caused by an external environment at high or low temperature.

One embodiment of a filter for an antenna according to the present invention includes a notch assembly including a notch bar formed of a metal workpiece and a notch body combined and coupled to the notch bar; and a filter body having a notch insertion portion in a groove shape so that the notch assembly is inserted and fixed, wherein the notch body includes: a one-side coupling body in which a notch receiving groove on one side is formed to accommodate a portion of one side of the notch bar in the width direction; and a second coupling body in which a notch receiving groove on the other side is formed to accommodate a portion of the other side in the width direction of the notch bar.

In addition, a pair of connection parts are formed on one side of the coupling body to protrude toward the insertion direction, which is the side of the notch insertion part, and are spaced apart from each other, and on the other side of the coupling body, a pair of connection parts are formed to protrude toward the insertion direction, which is the side of the notch insertion part, and are spaced apart from each other. It may include the other side coupling body formed.

In addition, one of the pair of connection parts formed on the one side coupling body is provided with a connection protrusion so as to protrude a predetermined length toward the other coupling body, and the other one of the pair of connection parts formed on the one side coupling body has a connection protrusion protruding inward. A connection groove is formed to be recessed, and a connection groove is formed to be recessed inward so that the connection protrusion formed on the one side coupling body is inserted into any one of the pair of connection parts formed in the other coupling body, and the other coupling body is formed to be recessed. The other one of the pair of connecting portions formed on the body may be provided with a connecting protrusion that protrudes a predetermined length toward the one engaging body so as to be inserted into a connecting groove formed on the one engaging body.

In addition, the connecting protrusions formed on the one side coupling body and the other coupling body are respectively fixed in an interference fit manner to the connection grooves formed on the one coupling body and the other coupling body, and enable the interference fitting fixation, and the one side A portion of the connection portion where the connection groove of the coupling body and the other coupling body is formed may be cut so as to be opened outward toward the inlet side of the connection groove.

Additionally, the notch body may be made of an insulating material or a dielectric material for electrical isolation between the notch bar formed from the metal workpiece and the notch insertion portion.

In addition, the notch bar may be formed with one body receiving groove and the other body receiving groove respectively received in one notch receiving groove of the one side coupling body and the other notch receiving groove of the other coupling body.

In addition, the notch assembly includes a tension fixing part provided on a side opposite to the insertion direction of the notch insertion part and one-touch fixing the notch body to which the notch bar is coupled to the notch insertion part by an external force in the insertion direction, which is on the notch insertion part side; and a tolerance absorbing part that absorbs the tolerance existing in the notch body and the notch insertion part in conjunction with the fixing force of the tension fixing part. It may further include.

In addition, at least two or more cavities are formed to be recessed in the filter body, the notch insertion portion is formed on a partition wall provided to partition the adjacent cavities, and is formed to communicate a portion of the adjacent cavities, and the tension fixing part The portion may be formed on one side of the coupling body and the other side of the coupling body, respectively.

In addition, the separation distance between the outer ends of each of the front ends of the tension fixing portion of the one coupling body and the other coupling body is the inner surface of each of the one engaging portion formed on one side of the notch insertion portion and the other engaging portion formed on the other side of the notch inserting portion. It can be formed to be longer than the separation distance between them.

In addition, the respective separation distance between the lower portion of the tension fixing portion of the one coupling body and the other coupling body is the separation distance between each inner surface of the one engaging portion formed on one side of the notch insertion portion and the other engaging portion formed on the other side of the notch inserting portion. It can be formed smaller.

According to an embodiment of the antenna filter and its notch assembly according to the present invention, the following various effects can be achieved.

First, the notch assembly can be assembled into the cover insertion part with one touch, which has the effect of significantly shortening the assembly time.

Second, the tension locking portion of the notch assembly is caught in the locking groove of the cover insertion portion, thereby preventing the notch assembly from being separated.

Third, the tolerance absorbing part of the notch assembly has the effect of easily absorbing assembly tolerances, including injection tolerances and processing tolerances, and environmental tolerances according to the external environment.

1 is a partial perspective view showing an example of applying a notch to an antenna filter according to the prior art;
Figure 2 is a perspective view showing an embodiment of an antenna filter according to the present invention;
Figure 3 is a plan view of Figure 2,
Figure 4 is an exploded perspective view of Figure 2;
Figure 5 is a perspective view showing the notch assembly in the structure of Figure 2;
Figure 6 is a front view showing the notch assembly in the structure of Figure 2;
Figure 7 is an exploded perspective view of Figure 5;
Figures 8a and 8b are cut-away perspective views taken along lines AA and BB of Figure 5;
Figures 9a and 9b are cross-sectional views taken along lines CC and DD of Figure 2;
FIG. 10 is a partially cut perspective view taken along line CD of FIG. 2 and an enlarged view thereof.

Hereinafter, an embodiment of a filter for an antenna and a notch assembly thereof according to the present invention will be described in detail with reference to exemplary drawings. When adding reference numerals to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

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

Throughout the specification, when a part is said to 'include' or 'have' a certain component, this means that it does not exclude other components, but may further include other components, unless specifically stated to the contrary. .

Figure 2 is a perspective view showing an embodiment of a filter for an antenna according to the present invention, Figure 3 is a plan view of Figure 2, Figure 4 is an exploded perspective view of Figure 2, and Figure 5 shows a notch assembly in the structure of Figure 2. It is a perspective view, FIG. 6 is a front view showing the notch assembly of the configuration of FIG. 2, FIG. 7 is an exploded perspective view of FIG. 5, and FIGS. 8A and 8B are cut 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, and FIG. 10 is a partially cut perspective view and an enlarged view thereof taken along lines C-D of FIG. 2.

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

In the filter body 110, as shown in FIG. 2, at least two cavities (C, C1, C2) are formed to be recessed, and a partition wall provided to mutually partition the adjacent cavities (C, C1, C2) (drawing symbol not shown) may be formed. Here, the cavities (C, C1, C2) may be components provided to generate resonance in their own shape without the need for a dielectric resonance element.

At least two cavities (C, C1, C2) are provided with the upper part open in the drawing, and although not shown in the drawing, there is a filter cover that shields the open surface of the cavity (C, C1, C2). may be provided. As shown in FIG. 1, the filter cover may be provided with a plurality of tuning screws 150 whose heads are fitted into the filter cover with a predetermined hole as a tuning structure for tuning the filtering characteristics of the radio frequency filter. there is.

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

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

Meanwhile, the notch assembly 200 is designed to improve insertion loss and skirt characteristics, which are important characteristics in radio frequency filters. More specifically, important characteristics of radio frequency filters include insertion loss and skirt characteristic.

Here, insertion loss refers to the power lost as a signal passes through the filter, and skirt characteristic refers to the steepness of the pass band and stop band of the filter. In general, insertion loss and skirt characteristics have a trade-off relationship with each other depending on the number (order) of the filter, so as the number of stages of the filter increases, the skirt characteristics improve but the insertion loss worsens.

*The notch assembly 200 is intended to improve the skirt characteristics of the filter without increasing the number of stages of the filter. 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 capacitance coupling between resonant elements of two adjacent cavities C1 and C2 that are not circuitically continuous. In one embodiment of the present invention, the notch bar 240 extends toward each of the two cavities C and is provided with a metal workpiece whose front end is bent downward in the drawing.

Such a notch bar 240 has the notch body 205 of the notch assembly 200 in the notch insertion portion 111 formed on the partition wall that divides two cavities C adjacent to each other. It can be fixed with an insertion motion.

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

The notch assembly 200 is inserted into the notch insertion portion 111 by moving downward in the drawing. Here, in order to prevent confusion in understanding, the direction in which the notch assembly 200 is moved to be inserted into the notch insertion portion 111 is defined as the 'insertion direction', and the opposite direction is defined as the 'opposite direction (or deviation) of the insertion direction. Direction)' is defined and explained.

As shown in FIG. 4 , the notch assembly 200 may include a notch body 205 and a notch bar 240 secured by the notch body 205 .

The notch body 205 is made of an insulating material for electrical isolation between the notch bar 240 and the notch insertion portion 111, and serves as a medium for fixing the notch bar 240 to the notch insertion portion 111. You can. Here, the notch body 205 may also be made of a dielectric material.

Meanwhile, as shown in FIGS. 5 and 6, the notch body 205 has a notch receiving groove 216 formed on one side to accommodate a portion of one side in the width direction of the notch bar 240, protrudes toward the insertion direction, and mutually extends. One side of the coupling body 210 is formed with a pair of spaced connecting portions 212, and the other side notch receiving groove 226 is formed to accommodate a portion of the other side in the width direction of the notch bar 240, and protrudes toward the insertion direction and are spaced apart from each other. It may include the other coupling body 220 on which a pair of connecting portions 222 are formed.

The one side coupling body 210 and the other coupling body 220 are in a state in which a part of one side in the width direction and a part of the other side in the width direction of the notch bar 240 are accommodated in the one notch receiving groove 216 and the other notch receiving groove 226, respectively. A pair of connecting portions 212 and 222 may be combined and combined with each other to be surrounded by .

Here, the mutual depth of the one side notch receiving groove 216 of one side coupling body 210 and the other notch receiving groove 226 of the other coupling body 220 is, after the notch bar 240 is fully inserted, respectively. It is preferable that the outer ends of the notch receiving groove 216 and the other notch receiving groove 226 are formed at a depth that allows mutual contact.

More specifically, as shown in FIGS. 7 to 8B, one of the pair of connection portions 212 formed on one side of the coupling body 210 has a connection protrusion ( 213) may be provided, and a connection groove 214 recessed inward may be formed in the other of the pair of connection parts 212 formed on one side of the coupling body 210.

Likewise, a connection groove 224 is formed in one of the pair of connection parts 222 formed on the other coupling body 220 and is recessed inward so that the connection protrusion 213 formed on the one coupling body 210 is inserted. , the other of the pair of connecting portions 222 formed on the other coupling body 220 has a connecting protrusion that protrudes a predetermined distance toward the one coupling body 210 to be inserted into the connecting groove 214 formed on the one coupling body 210. (not shown) may be provided.

Here, the inner diameter of the connection grooves 214 and 224 formed in each of the one side coupling body 210 and the other coupling body 220 is formed to be smaller than the outer diameter of the connection protrusion 213 formed to be roughly combined with each other, so that one side coupling body 210 and When the other coupling bodies 220 are coupled to each other, the connecting protrusions 213 and 223 may be provided to be fixed to the connecting grooves 214 and 224 in an interference fit manner.

However, physically, if the inner diameter of the connecting grooves 214 and 224 is smaller than the outer diameter of the connecting protrusion 213, the fitting coupling itself may be impossible. Therefore, to facilitate the interference fitting coupling as described above, one side of the coupling body 210 and the other side Parts of the connecting portions 212 and 222 in which the connecting grooves 214 and 224 of the coupling body 220 are formed may be provided with cut portions 215 and 225 that are cut outward toward the entrance side of the connecting grooves 214 and 224, respectively.

Accordingly, when the connection protrusions 213 and 223 are respectively inserted into the connection grooves 214 and 224, the interference fit coupling can be completed by an operation in which the openings 215 and 225 are opened and restored by an external force such as an interference fit force. Therefore, when the one side coupling body 210 and the other coupling body 220 are coupled to each other, the coupling can be completed through a simple interference fit coupling method without having a separate fastening member such as a fastening screw, thereby reducing the assembly time. It provides the advantage of being able to shorten the time.

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

One notch receiving groove 216 and the other notch receiving groove 226 formed on one side coupling body 210 and the other coupling body 220, and the one side body receiving groove 241 formed on the notch bar 240 and the other body receiving groove 241 are formed on the notch bar 240. The notch bar allows a portion of the one side coupling body 210 and the other coupling body 220 to be accommodated in the groove 242, respectively, and the remaining end in the width direction and the other end in the width direction of the notch bar 240 are accommodated, respectively. The incision may be formed to have an approximately 'ㄷ' shaped cross section penetrating in the longitudinal direction of (240).

Accordingly, when the connection grooves 214 and 224 and the connection protrusion 213 of one side of the coupling body 210 and the other side of the coupling body 220 are completely coupled to each other in an operation of press fitting each other, the notch bar 240 is formed between the notch bars, respectively. It can be completely shielded by the notch body 205 accommodating a portion of 240.

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

In this way, in one embodiment of the antenna filter 100 according to the present invention, the notch body 205 is formed separately into one side combined body 210 and the other side combined body 220, and then a single notch bar 240 is formed. ) is configured to be inserted and fixed between the two cavities (C), so that the notch bar 240 of various lengths can be easily replaced to adjust the insertion loss and skirt characteristics between the two cavities (C).

Meanwhile, as shown in FIGS. 6 to 10, the notch body 205 is provided on the side opposite to the insertion direction of the notch insertion portion 111, and the notch body 205 is inserted into the notch insertion portion by an external force in the insertion direction. Tension fixing parts 211 and 221 that are one-touch fixed to (111) and a tolerance absorbing part 230 that absorbs the tolerance existing in the notch body 205 and the notch insertion part 111 in conjunction with the fixing force of the tension fixing parts 211 and 221. ) may include.

The tension fixing portions 211 and 221 are fastened to the locking portions 113a and 113b formed on the notch insertion portion 111, which will be described later, to prevent the notch body 205 from being separated to the outside, and to prevent the notch body 205 from being separated to the outside. It serves to continuously adhere to the bottom side of the notch insertion portion 111.

The tension fixing portions 211 and 221 may be provided with a pair of tension bars formed so that the distance between them gradually increases in a direction opposite to the insertion direction. Here, the pair of tension bars may be formed integrally with the notch body 205 and may be made of an elastic material that is deformed and restored by an external force.

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

More specifically, the tension fixing portions 211 and 221, which are provided with a pair of tension bars, are integrally formed at the upper end of the notch body 205 and extend upward, and are formed so that the mutual separation distance gradually increases toward the upper side. You can.

Meanwhile, as referred to 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 provided with a locking portion ( 113a and 113b) may be provided, respectively. The locking portions 113a and 113b may be provided in the form of protrusions that each protrude a predetermined length from the upper end of the notch insertion portion 111 to the inside of the notch insertion portion 111.

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

However, the respective separation distances of the lower portions of the pair of tension bars are set between the inner surface of one locking part 113a and the other locking part ( It may be formed to be smaller than the separation distance between the inner surfaces of 113b).

In addition, the upper portions of the one-side locking portion 113a and the other locking portion 113b in the drawing are easily positioned on the outer surfaces of each of the pair of tension bars when inserting the notch assembly 200 into the notch insertion portion 111. An inclined portion 113' may be formed to be inclined downward in the insertion direction so as to move in a slip manner.

Therefore, when inserting and fixing the notch assembly 200 into the notch insertion portion 111, one side of the outer portion of the tip of the pair of tension bars is caught before the notch body 205 is seated on the bottom of the notch insertion portion 111. After going 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 surface of the one locking portion 113a and the other locking portion 113b. Leaving the furnace can be prevented.

Meanwhile, the tolerance absorbing part 230 easily absorbs assembly tolerances, including injection tolerances and processing tolerances that occur in the process of manufacturing the notch assembly 200 through the injection process, and environmental tolerances due to external environments such as heat. It plays a role.

More specifically, the tolerance absorbing part 230 may be formed to protrude in the insertion direction from the lower surface of the notch body 205 so as to come into close contact with the bottom of the notch insertion part 111, as shown in FIGS. 5 and 9B. there is.

In addition, the tolerance absorbing part 230 may be formed to be round so as to elastically contact the bottom of the notch insertion part 111. To this end, the tolerance absorbing portion 230 may be formed integrally with the notch body 205 and may be made of an elastic material that is deformed and restored by an external force.

Here, the tolerance absorbing part 230 may be provided so that one end and the other end are connected to a pair of connection parts 212 and 222 protruding in the insertion direction at the bottom of each of the one side coupling body 210 and the other coupling body 220. there is. Accordingly, two tolerance absorption parts 230 may be formed in a single notch body 205, respectively.

Meanwhile, in one embodiment of the antenna filter 100 according to the present invention, as shown in FIG. 9A, the upper ends of the tension fixing parts 211 and 221 (i.e., the tip of the tension bar) and the tolerance absorbing part 230 The upper and lower vertical height D4 between the lower ends is greater than the upper and lower vertical height D3 between the lower surfaces of the engaging portions 113a and 113b of the notch insertion portion 111 and the bottom forming the bottom of the notch insertion portion 111. It is desirable to form it large. Accordingly, when the notch assembly 200 is inserted and fixed into the notch insertion portion 111, the above-described tolerance can be absorbed by the amount of vertical 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 attached drawings (especially FIG. 10) as follows.

First, when the notch assembly 200 is moved and fixed to the notch insertion portion 111 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 with a locking portion ( After moving downward on the 113a, 113b), it is caught in the direction opposite to the insertion direction by the engaging portions 113a, 113b.

Therefore, in one embodiment 100 of the present invention, a separate epoxy molding process to prevent the notch assembly 200 from leaving the outside is not necessary, and thus the assembly time delayed during the curing time of the conventional epoxy molding is greatly reduced. It can be shortened.

Meanwhile, when the notch assembly 200 is completely locked to the notch insertion portion 111 by the tension fixing portions 211 and 221, the tolerance absorbing portion 230 is attached to the notch insertion portion 111, as shown in FIG. 8 . As it adheres closely to the bottom, it can absorb various types of tolerances by elastically deforming due to external forces such as assembly force provided from the outside.

In addition, of course, it is possible to adjust the resonance characteristics through the tuning screw 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 coupling body 210 Press the tension fixing parts 211 and 221 provided on the body 220 so that they are adjacent to each other to separate them from the engaging parts 113a and 113b of the notch insertion part 111, and then connect the one side coupling body 210 and the other coupling body 220. Since it can be separated and replaced and assembled, it provides the advantage of excellent workability.

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

100: Filter for antenna 110: Filter body
111: notch insertion part 113a, 113b: catching part
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 part 213,223: connection protrusion
214,224: Connection groove 215,225: Open section
216: Notch receiving groove on one side 220: Combined body on the other side
226: Other side notch receiving groove 230: Tolerance absorption portion
240: Notch bar 241: One side body receiving groove
242: Other body receiving groove

Claims (10)

A notch assembly including a notch bar formed of a metal workpiece and a notch body coupled to the notch bar. and
A filter body including a notch insertion portion provided in a groove shape so that the notch assembly is inserted and fixed,
The notch body is,
One side coupling body in which one side notch receiving groove is formed to accommodate a portion of one side in the width direction of the notch bar; and
A filter for an antenna, comprising a second coupling body in which a notch receiving groove on the other side is formed to accommodate a portion of the other side in the width direction of the notch bar. In claim 1,
A pair of connecting portions are formed on one side of the coupling body to protrude toward the insertion direction, which is the side of the notch insertion portion, and to be spaced apart from each other,
The other side coupling body protrudes toward the insertion direction, which is the notch insertion side, and includes a pair of connection parts formed to be spaced apart from each other. In claim 2,
One of the pair of connection parts formed on the one side coupling body is provided with a connecting protrusion so as to protrude a predetermined length toward the other coupling body, and the other one of the pair of connection parts formed on the one side coupling body is recessed inward. A connecting groove is formed,
One of the pair of connection parts formed on the other coupling body is formed with a connection groove that is recessed inward to allow the connection protrusion formed on the one coupling body to be inserted, and one of the pair of connection parts formed on the other coupling body is formed. The other filter for an antenna is provided with a connecting protrusion that protrudes a predetermined length toward the one-side coupling body so as to be inserted into a connection groove formed on the one-side coupling body. In claim 3,
The connecting protrusions formed on the one coupling body and the other coupling body are respectively fixed in an interference fit manner to the connecting grooves formed on the one coupling body and the other coupling body,
A filter for an antenna, wherein a portion of the connection portion in which the connection groove of the one side coupling body and the other side coupling body is formed is cut so as to be opened outward toward the inlet side of the connection groove to enable the interference fit fixation. In claim 1,
The notch body is made of an insulating material or a dielectric material for electrical isolation between the notch bar formed from the metal workpiece and the notch insertion part. In claim 1,
The notch bar is formed with one body receiving groove and the other body receiving groove respectively received in one notch receiving groove of the one side coupling body and the other notch receiving groove of the other coupling body. In claim 1,
The notch assembly includes: a tension fixing part provided on a side opposite to the insertion direction of the notch insertion part and one-touch fixing the notch body to which the notch bar is coupled to the notch insertion part by an external force in the insertion direction, which is on the notch insertion part side; and
a tolerance absorbing part that absorbs the tolerance existing in the notch body and the notch insertion part in conjunction with the fixing force of the tension fixing part; A filter for an antenna, further comprising: In claim 7,
At least two or more cavities are formed to be recessed in the filter body,
The notch insertion portion is formed on a partition wall provided to partition the adjacent cavities, and is formed to communicate portions of the adjacent cavities,
The tension fixing unit is formed on one side of the coupling body and the other side of the coupling body, respectively. In claim 8,
The separation distance between the outer ends of each of the front ends of the tension fixing portion of the one coupling body and the other coupling body is the distance between each inner surface of the one engaging portion formed on one side of the notch insertion portion and the other engaging portion formed on the other side of the notch inserting portion. A filter for an antenna formed to be longer than the separation distance. In claim 8,
The respective separation distance between the lower portion of the tension fixing portion of the one coupling body and the other coupling body is smaller than the separation distance between each inner surface of the one engaging portion formed on one side of the notch insertion portion and the other engaging portion formed on the other side of the notch inserting portion. Formed filter for antenna.