WO2012036343A1

WO2012036343A1 - Resonator type dielectric low pass filter and communication device including same

Info

Publication number: WO2012036343A1
Application number: PCT/KR2010/008106
Authority: WO
Inventors: 류지만; 장대훈; 김남철; 피터스 제임스엠
Original assignee: (주)파트론
Priority date: 2010-09-15
Filing date: 2010-11-16
Publication date: 2012-03-22
Also published as: KR101161122B1; KR20120028594A

Abstract

Provided is a resonator type dielectric low pass filter. The resonator type dielectric low pass filter includes: a dielectric block having a resonance hole therein; a ground pattern disposed on at least one side of the dielectric block; an input/output pattern disposed on the dielectric block and spaced from the ground pattern to form the ground pattern and first and second capacitors; a resonator pattern disposed on an inner wall of the resonance hole and having a cavity in the middle thereof; and an inductor pattern disposed on the dielectric block to be connected to the input/output pattern and the resonator pattern.

Description

Resonator type dielectric low pass filter and communication element comprising same

The present invention relates to a resonator type dielectric low pass filter and a communication element comprising the same.

In general, low pass filters used in wireless communication systems are manufactured in the form of LC concentrators, micro strip lines, or LTCCs. Among them, the low pass filter manufactured by the LC lumped element has a high insertion loss in the circuit and it is very difficult to implement in the high frequency region of the GHz band.When the low pass filter manufactured by the micro strip line is mounted on the communication device, The disadvantage is that it takes up a relatively large physical space compared to the others. In addition, the low pass filter manufactured in the LTCC form has a large insertion loss in the circuit as well as a disadvantage that tuning is impossible.

Accordingly, research on a new type of low pass filter that can compensate for these drawbacks is in progress.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a resonator type dielectric low pass filter capable of obtaining a low insertion loss and a rapid attenuation characteristic while occupying a relatively narrow space when mounted in a communication device.

Another technical problem to be solved by the present invention is to provide a communication device mounted with the resonator type dielectric low pass filter.

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

One aspect of the resonator type dielectric low pass filter of the present invention for achieving the above technical problem is a dielectric block having a resonance hole, a ground pattern disposed on at least one surface of the dielectric block, disposed on the dielectric block, and grounded Input and output patterns spaced apart from the ground pattern to form patterns and first and second capacitors respectively, a resonator pattern disposed in the inner wall of the resonant hole and having a cavity in the center thereof, and an input / output pattern and a resonator pattern on the dielectric block And an inductor pattern disposed to be connected to the inductor.

One aspect of the communication device of the present invention for achieving the above another technical problem, the ground terminal, the signal input terminal and the signal output terminal is formed; And a resonator type dielectric low pass filter mounted on the substrate, wherein the resonator type dielectric low pass filter comprises: a dielectric block having a resonance hole formed therein, a ground pattern disposed on at least one surface of the dielectric block and connected to a ground terminal; An input / output pattern disposed apart from the ground pattern and connected to the signal input terminal and the signal output terminal to form a ground pattern on the block and first and second capacitors, respectively, and disposed at an inner wall of the resonance hole, and having a cavity at the center thereof And a resonator pattern and an inductor pattern disposed on the dielectric block to be connected to the input / output pattern and the resonator pattern.

Specific details of other embodiments are included in the detailed description and the drawings.

The resonator type dielectric low pass filter according to the embodiments of the present invention is formed on the dielectric block to occupy a relatively narrow space when mounted in a communication device, and the insertion loss in the circuit is low, and the abrupt attenuation characteristics are realized. This has a possible advantage.

1 and 2 are perspective views of the resonator type dielectric low pass filter according to the first embodiment of the present invention, respectively, as viewed from above and below.

3 is an equivalent circuit diagram of a resonator type dielectric low pass filter according to a first embodiment of the present invention.

4 and 5 are perspective views of the resonator type dielectric low pass filter according to the second embodiment of the present invention as viewed from the top and bottom, respectively.

6 is an equivalent circuit diagram of a resonator type dielectric low pass filter according to a second embodiment of the present invention.

7 and 8 are perspective views as viewed from the top and bottom of the resonator type dielectric low pass filter according to the third embodiment of the present invention, respectively.

9 is an equivalent circuit diagram of a resonator type dielectric low pass filter according to a third embodiment of the present invention.

10 to 12 are diagrams for explaining the frequency response characteristics of the resonator type dielectric low pass filter in accordance with embodiments of the present invention.

13 is a perspective view from above of a communication device according to an embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. The size and relative size of the components shown in the drawings may be exaggerated for clarity of explanation.

Like reference numerals refer to like elements throughout the specification, and "and / or" includes each and every combination of one or more of the mentioned items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and / or “made of” refers to a component, step, operation, and / or element that includes one or more other components, steps, operations, and / or elements. It does not exclude existence or addition.

Although the first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another. Therefore, of course, the first component mentioned below may be a second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, a resonator type dielectric low pass filter according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

1 and 2 are perspective views of the resonator type dielectric low pass filter according to the first embodiment of the present invention, respectively, as viewed from above and below. 3 is a circuit diagram of a resonator type dielectric low pass filter according to a first embodiment of the present invention.

1 to 3, the resonator type dielectric low pass filter 100 according to the first embodiment of the present invention includes a dielectric block 10, a

ground pattern

30 and 31, an input /

output pattern

40 and 50, The first resonator patterns 61a to 61c and the first and

second inductor patterns

71 and 72 may be included.

The dielectric block 10 may be a mono block in which a dielectric material is formed in a hexahedral shape as shown in FIGS. 1 and 2. In addition, the first resonance hole 21 may be formed in the dielectric block 10. The first resonator hole 21 is a hole in which a conductor is applied to an inner wall thereof to form a resonator (Re1 of FIG. 3), and may have a circular shape as shown in FIGS. 1 and 2.

Although FIGS. 1 and 2 illustrate that the hexagonal dielectric block 10 and the circular first resonance hole 21 are formed in the center of the dielectric block 10, the present invention is not limited thereto. The shape of the dielectric block 10 is not limited to the shape of a hexahedron, and the shape of the first resonance hole 21 is not limited to a circle. That is, if necessary, the shape of the dielectric block 10 may be deformed differently from the drawing, and the shape of the first resonator hole 21 may be deformed differently from the drawing if the shape of the first resonator hole 21 is effective to form a resonator. Do.

Ground patterns

30 and 31 may be disposed on at least one surface of the dielectric block 10. 1 and 2 illustrate that the first ground pattern 30 and the second ground pattern 31 face each other on the front and rear surfaces of the dielectric block 10, but the present invention is not limited thereto. One of the first ground pattern 30 and the second ground pattern 31 may be omitted as necessary. In addition, although not shown, it is also possible to further arrange the third or fourth ground pattern (not shown) if necessary. 1 and 2, the first ground pattern 30 and the second ground pattern 31 are formed on the front and rear surfaces of the dielectric block 10, respectively, and the dielectric having the input /

output patterns

40 and 50 formed thereon. A portion of the left and right surfaces of the block 10 may be formed to be spaced apart from the input /

output patterns

40 and 50 by a predetermined interval, respectively. These

ground patterns

30 and 31 serve as ground electrodes while the resonator type dielectric low pass filter 100 is operating.

The input /

output patterns

40 and 50 may serve as input lines for receiving signals input to the resonator type dielectric low pass filter 100 and output lines for outputting signals output from the resonator type dielectric low pass filter 100. Can be. As shown in FIGS. 1 and 2, the input /

output patterns

40 and 50 have a first pattern 40 that is uniform with the

ground patterns

30 and 31 on the lower, right and upper surfaces of the dielectric block 10. The second pattern 50 may be disposed to be spaced apart from each other, and the second pattern 50 may be disposed to be spaced apart from the

ground patterns

30 and 31 on the lower surface, the left surface, and the upper surface of the dielectric block 10, but the first pattern 40 may be spaced apart. ) May be arranged to face. Here, the first pattern 40 may be disposed to be spaced apart from the

ground patterns

30 and 31 by a predetermined interval to form the first capacitor C1, and the second pattern 50 may be uniform with the

ground patterns

30 and 31. The second capacitor C2 may be formed by being spaced apart from each other. That is, the input /

output patterns

40 and 50 play a role of a line through which an input signal and an output signal flow, and also serve as the first and second capacitors C1 and C2 using the

ground patterns

30 and 31 as other electrodes. Can be performed. Therefore, the input /

output patterns

40 and 50 should be arranged to be spaced apart from the

ground patterns

30 and 31 as shown in FIGS. 1 and 2.

As shown in FIGS. 1 and 2, the first resonator patterns 61a to 61c may be formed by applying a conductor to an inner wall of the first resonator hole 21. Specifically, the first resonator patterns 61a to 61c may include a first upper pattern 61a disposed on the top surface of the dielectric block 10 so as to be connected to the first and

second inductor patterns

71 and 72, and a first resonant hole. (21) a first inner pattern 61b disposed on the inner wall to be connected to the first upper pattern 61a and the first lower pattern 61c, and having a predetermined cavity formed in the center thereof; The lower surface of the dielectric block 10 may include a first lower pattern 61c disposed to be connected to the first internal pattern 61b and spaced apart from the

ground patterns

30 and 31. Here, since the first lower pattern 61c is disposed to be spaced apart from the

ground patterns

30 and 31 by a predetermined interval to form the third capacitor C3, the first lower pattern 61c is grounded as shown in FIG. 2. It should be arranged to be spaced apart from the pattern (30, 31).

The first resonator patterns 61a to 61c may serve as a first resonator (Re1 of FIG. 3) together with the first resonator hole 21 in the resonator type dielectric low pass filter 100. 1 and 2, the area of the first lower pattern 61c may be larger than the area of the first upper pattern 61a. However, this is only one example, and the area of the first lower pattern 61c and the area of the first upper pattern 61a may be modified differently as necessary.

As shown in FIG. 1, the first inductor pattern 71 is disposed on the upper surface of the dielectric block 10, and the first pattern 40 and the first resonator patterns 61a to 61c of the input /

output patterns

40 and 50 are formed. It may be disposed to connect the first upper pattern (61a) of the, and the second inductor pattern 72 is disposed on the upper surface of the dielectric block 10, as shown in Figure 1, the input and output patterns (40, 50) It may be arranged to connect the second pattern 50 of the first pattern and the first upper pattern (61a) of the first resonator patterns (61a ~ 61c). The first and

second inductor patterns

71 and 72 may serve as the first and second inductors L1 and L2 in the resonator type dielectric low pass filter 100, respectively. Accordingly, the first and

second inductor patterns

71 and 72 have predetermined inductance values as the resonator type dielectric low pass filter 100 of the present invention operates.

Although the resonator type dielectric low pass filter according to the first embodiment of the present invention has been described above with reference to FIGS. 1 to 3, the present invention is not limited to the shapes shown in FIGS. 1 and 2. That is, if the function as described above can be exhibited, the shape of the dielectric block 10, the

ground patterns

30 and 31, the input and

output patterns

40 and 50, the first resonator patterns 61a to 61c, and the first and the first The arrangement of the two

inductor patterns

71 and 72 can be modified in any way. In the following, further two embodiments will be further described in the modified embodiments.

First, a resonator type dielectric low pass filter according to a second embodiment of the present invention will be described with reference to FIGS. 4 to 6.

4 and 5 are perspective views of the resonator type dielectric low pass filter according to the second embodiment of the present invention, respectively, and FIG. 6 is a perspective view of the resonator type dielectric low pass filter according to the second embodiment of the present invention. It is a circuit diagram. In the following description, for the convenience of description, the description of the resonator type dielectric low pass filter according to the first embodiment of the present invention will be omitted. That is, only the differences will be described below, and like reference numerals denote like elements.

4 to 6, the resonator type dielectric low pass filter 100 according to the second embodiment of the present invention includes a second resonator hole 22, second resonator patterns 62a to 62c, and a third inductor pattern. (73) may be further included.

The shape of the second resonance hole 22 may be the same as the shape of the first resonance hole 21. That is, the second resonance hole 22 may be, for example, a circular hole having the same shape as that of the first resonance hole 21.

The second resonator patterns 62a to 62c may include a second upper pattern 62a disposed on the upper surface of the dielectric block 10 so as to be connected to the second and

third inductor patterns

72 and 73, and the second resonator hole 22. A second inner pattern 62b and a dielectric block 10 disposed on the inner wall to be connected to the second upper pattern 62a and the second lower pattern 62c, and having a predetermined cavity in the center thereof. The lower surface may include a second lower pattern 62c disposed to be connected to the second internal pattern 62b and spaced apart from the

ground patterns

30 and 31. Here, since the second lower pattern 62c is disposed to be spaced apart from the

ground patterns

30 and 31 by a predetermined interval to form the fourth capacitor C4, the second lower pattern 62c is grounded as shown in FIG. 5. It should be arranged to be spaced apart from the pattern (30, 31). The second resonator patterns 62a to 62c may serve as the second resonator Re2 together with the second resonator hole 22 in the resonator type dielectric low pass filter 100.

Meanwhile, as shown in FIG. 5, the first lower pattern 61c and the second lower pattern 62c may be spaced apart from each other to form the seventh capacitor C7. Therefore, the first lower pattern 61c and the second lower pattern 62c should be disposed to be spaced apart from each other. In addition, as illustrated in FIG. 5, the areas of the first lower pattern 61c and the second lower pattern 62c may be different from each other. That is, the capacitance value of the third capacitor C3 and the capacitance value of the fourth capacitor C4 may be different from each other. However, this is only one example, and the areas of the first lower pattern 61c and the second lower pattern 62c may be adjusted to be identical to each other and different from those shown in FIG. 5 as necessary.

As shown in FIG. 4, the third inductor pattern 73 is disposed on the upper surface of the dielectric block 10 so as to connect the output pattern 50 and the second upper pattern 62a of the second resonator pattern. And may serve as the third inductor L3 in the resonator type dielectric low pass filter 100. Accordingly, the third inductor pattern 73 has a predetermined inductance value as the resonator type dielectric low pass filter 100 operates.

Next, a resonator type dielectric low pass filter according to a third embodiment of the present invention will be described with reference to FIGS. 7 to 9.

7 and 8 are perspective views of a resonator type dielectric low pass filter according to a third embodiment of the present invention, respectively, and FIG. 9 is a perspective view of the resonator type dielectric low pass filter according to a third embodiment of the present invention. It is a circuit diagram. Similarly, hereinafter, for convenience of description, descriptions of the resonator type dielectric low pass filter according to the first and second embodiments of the present invention will be omitted. That is, only the differences will be described below, and like reference numerals denote like elements.

7 to 9, the resonator type dielectric low pass filter 100 according to the third embodiment of the present invention may include the third and fourth resonator holes 23 and 24, and the third and fourth resonator patterns 63a. ˜63c, 64a to 64c, and fourth and

fifth inductor patterns

74 and 75.

The size and shape of the third and fourth resonance holes 23 and 24 may be the same as the size and shape of the first and second resonance holes 21 and 22. The third resonator patterns 63a to 63c may include a third upper pattern 63a disposed on the upper surface of the dielectric block 10 so as to be connected to the third and

fourth inductor patterns

73 and 74, and a third resonant hole. (23) A third internal pattern 63b and a dielectric block disposed on the inner wall to be connected to the third upper pattern 63a and the third lower pattern 63c, and having a predetermined cavity in the center thereof. 10) The lower surface may include a third lower pattern 63c disposed to be connected to the third internal pattern 63b and spaced apart from the

ground patterns

30 and 31. Here, since the third lower pattern 63c is disposed to be spaced apart from the

ground patterns

30 and 31 by a predetermined interval to form the fifth capacitor C5, the third lower pattern 63c is grounded as shown in FIG. 8. It should be arranged to be spaced apart from the pattern (30, 31).

The fourth resonator patterns 64a to 64c may include a fourth upper pattern 64a disposed on the upper surface of the dielectric block 10 so as to be connected to the fourth and

fifth inductor patterns

74 and 75, and a fourth resonator hole. (24) A fourth internal pattern 64b and a dielectric block disposed on the inner wall to be connected to the fourth upper pattern 64a and the fourth lower pattern 64c, and having a predetermined cavity formed in the center thereof. 10) The lower surface may include a fourth lower pattern 64c disposed to be connected to the fourth internal pattern 64b and spaced apart from the

ground patterns

30 and 31. Here, since the fourth lower pattern 64c is disposed to be spaced apart from the

ground patterns

30 and 31 by a predetermined interval to form the sixth capacitor C6, the fourth lower pattern 64c is also grounded as shown in FIG. 8. It should be arranged to be spaced apart from the pattern (30, 31).

The third and fourth resonator patterns 63a to 63c and 64a to 64c are formed in the resonator type dielectric low pass filter 100 together with the third and fourth resonator holes 23 and 24, respectively. Re3, Re4) can play a role.

Meanwhile, the second lower pattern 62c and the third lower pattern 63c may be spaced apart from each other as shown in FIG. 8 to form an eighth capacitor C8, and the third lower pattern 63c As illustrated in FIG. 8, the fourth lower pattern 64c may be spaced apart from each other to form a ninth capacitor C9. Therefore, the second lower pattern 62c, the third lower pattern 63c, and the fourth lower pattern 64c should be disposed to be spaced apart from each other. In addition, as illustrated in FIG. 8, areas of the second lower pattern 62c and the third lower pattern 63c may be different from those of the first lower pattern 61c and the fourth lower pattern 64c. However, this is also merely an example, and if necessary, any one of the first to fourth lower patterns 61c to 64c may have an area different from the rest. That is, only one of the third to sixth capacitors C3 to C6 may have a different capacitance value.

The fourth and

fifth inductor patterns

74 and 75 are disposed on the upper surface of the dielectric block 10 as shown in FIG. 7, and the third upper patterns 63a of the third resonator patterns 63a to 63, respectively. And the fourth upper pattern 64a of the fourth resonator patterns 64a to 64c and the fourth upper pattern 64a of the fourth resonator patterns 64a to 64c and the output pattern 50. The fourth and

fifth inductor patterns

74 and 75 may serve as the fourth and fifth inductors L4 and L5 in the resonator type dielectric low pass filter 100, respectively. Accordingly, the fourth and

fifth inductor patterns

74 and 75 have predetermined inductance values as the resonator type dielectric low pass filter 100 operates.

Next, the frequency response characteristics of the resonator type dielectric low pass filter according to the embodiments of the present invention will be described with reference to FIGS. 10 to 12.

10 to 12, it can be seen that the resonator type dielectric low pass filter according to the embodiments of the present invention exhibits a response characteristic of the low pass filter. Specifically, as the number of resonators Re1 to Re4 formed by the resonance holes 21 to 24 and the resonance patterns 61a to 61c, 62a to 62c, 63a to 63c, and 64a to 64c increases, the abrupt attenuation characteristics are more rapid. It can be seen that. (See S21 of FIGS. 10-12)

That is, FIG. 11 shows the frequency response characteristics of the resonator type dielectric low pass filter according to the second embodiment of the present invention, and FIG. 10 shows the frequency response characteristics of the resonator type dielectric low pass filter according to the first embodiment of the present invention. In comparison, a sharper attenuation characteristic is shown after the cutoff frequency (C). 12 shows frequency response characteristics of the resonator type dielectric low pass filter according to the third embodiment of the present invention. FIG. 12 shows frequency response characteristics of the resonator type dielectric low pass filter according to the first and second embodiments of the present invention. In comparison with FIGS. 10 and 11, a more rapid attenuation characteristic is shown after the cutoff frequency C. FIG.

Therefore, it can be seen that the resonator type dielectric low pass filter according to the embodiments of the present invention works very well as a low pass filter in the circuit, and furthermore, the attenuation characteristics of the signal by adjusting the number of resonators Re1 to Re4. It can be seen that it can also be adjusted. That is, since the number of resonators Re1 to Re4 can be increased as necessary, it is possible to implement a sudden attenuation characteristic.

In addition, since the resonator type dielectric low pass filter according to the embodiments of the present invention is formed on the dielectric block 10, it occupies a relatively narrow space when mounted in a communication device, and also has low insertion loss in a circuit. There is this.

Next, a communication element according to an exemplary embodiment of the present invention will be described with reference to FIG. 13.

Referring to FIG. 13, a communication device 200 according to an embodiment of the present invention may include a substrate 210 and a resonator type dielectric low pass filter 100 according to embodiments of the present invention mounted on the substrate 210. ) May be included.

The substrate 210 is a component constituting the base of the communication element, and although not shown on the substrate 210, a signal input terminal (not shown) through which a communication signal is input and a signal from which a communication signal is output. An output terminal (not shown) and a ground terminal (not shown) connected to the ground electrode may be formed.

In addition, the resonator type dielectric low pass filter 100 according to the embodiments of the present invention may be mounted on the substrate 210 by, for example, a surface mounting technology (SMT) method, and the

ground patterns

30 and 31 may be disposed on the substrate. The ground terminal 210 and the input /

output patterns

40 and 50 of the 210 may be mounted to be connected to the signal input terminal (not shown) and the signal output terminal (not shown) of the substrate 210, respectively.

In addition to the other components described above while explaining the resonator type dielectric low pass filter 100 according to the embodiments of the present invention will be omitted overlapping.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments but may be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

The invention is applicable to the telecommunications industry using low pass filters. However, it is not limited thereto.

Claims

A dielectric block in which resonance holes are formed;

A ground pattern disposed on at least one surface of the dielectric block;

An input / output pattern disposed on the dielectric block and spaced apart from the ground pattern to form first and second capacitors, respectively, and the ground pattern;

A resonator pattern disposed on an inner wall of the resonator hole and having a cavity in the center thereof; And

A resonator type dielectric low pass filter including an inductor pattern disposed on the dielectric block and connected to the input / output pattern and the resonator pattern.
The method of claim 1,

And a resonator type dielectric low pass filter having a circular shape.
The method of claim 1,

The resonator pattern is,

An upper pattern disposed on the dielectric block to be connected to the inductor pattern;

An inner pattern formed on the inner wall of the resonance hole and connected to the upper pattern, and having a cavity formed in the center thereof;

A resonator type dielectric low pass filter comprising a lower pattern disposed on the dielectric block and connected to the inner pattern.
The method of claim 3, wherein

And an area of the lower pattern is larger than an area of the upper pattern.
The method of claim 3, wherein

The lower pattern is a resonator type dielectric low pass filter disposed on the dielectric block to be spaced apart from the ground pattern to form a ground capacitor and a third capacitor.
The method of claim 3, wherein

The resonance hole includes first and second resonance holes,

The resonator pattern includes a first resonator pattern disposed on an inner wall of the first resonance hole, and a second resonator pattern disposed on an inner wall of the second resonance hole,

The lower pattern of the first resonator pattern forms the ground pattern and a third capacitor,

And a lower pattern of the second resonator pattern to form the ground pattern and a fourth capacitor.
The method of claim 6,

And the lower pattern of the first resonator pattern and the lower pattern of the second resonator pattern are disposed on the dielectric block to be spaced apart from each other to form a seventh capacitor.
The method of claim 6,

And an area of the lower pattern of the first resonator pattern and an area of the lower pattern of the second resonator pattern are different from each other.
The method of claim 3, wherein

The resonance hole may include first to fourth resonance holes,

The resonator pattern may include first to fourth resonator patterns disposed on inner walls of the first to fourth resonator holes, respectively.

And the lower patterns of the first to fourth resonator patterns respectively form the ground pattern and the third to sixth capacitors.
The method of claim 9,

The lower pattern of the first resonator pattern and the lower pattern of the second resonator pattern form a seventh capacitor,

The lower pattern of the second resonator pattern and the lower pattern of the third resonator pattern form an eighth capacitor,

And the lower pattern of the third resonator pattern and the lower pattern of the fourth resonator pattern are disposed on the dielectric block to be spaced apart from each other to form a ninth capacitor.
The method of claim 9,

And an area of the lower pattern of at least one of the first to fourth resonator patterns is different from an area of the remaining lower pattern.
The method of claim 1,

The ground pattern may include a first ground pattern disposed on a first surface of the dielectric block;

And a second ground pattern disposed on the second surface of the dielectric block so as to face the first ground pattern.
A substrate on which a ground terminal, a signal input terminal and a signal output terminal are formed; And

A resonator type dielectric low pass filter mounted on the substrate,

The resonator type dielectric low pass filter,

A dielectric block having a resonance hole formed therein;

A ground pattern disposed on at least one surface of the dielectric block and connected to the ground terminal;

An input and output pattern spaced apart from the ground pattern and connected to the signal input terminal and the signal output terminal to form first and second capacitors and the ground pattern on the dielectric block, respectively;

A resonator pattern disposed on an inner wall of the resonance hole and having a cavity in the center thereof;

And an inductor pattern disposed on the dielectric block to be connected to the input / output pattern and the resonator pattern.
The method of claim 13,

And the resonator type dielectric low pass filter is mounted on the substrate in an SMT manner.