KR20000013921A - Dielectric filter - Google Patents

Dielectric filter Download PDF

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Publication number
KR20000013921A
KR20000013921A KR1019980033058A KR19980033058A KR20000013921A KR 20000013921 A KR20000013921 A KR 20000013921A KR 1019980033058 A KR1019980033058 A KR 1019980033058A KR 19980033058 A KR19980033058 A KR 19980033058A KR 20000013921 A KR20000013921 A KR 20000013921A
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KR
South Korea
Prior art keywords
conductor coating
shape
grinding
trim part
dielectric filter
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KR1019980033058A
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Korean (ko)
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KR100283703B1 (en
Inventor
황규한
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원대철
주식회사 이엠코
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Priority to KR1019980033058A priority Critical patent/KR100283703B1/en
Publication of KR20000013921A publication Critical patent/KR20000013921A/en
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Publication of KR100283703B1 publication Critical patent/KR100283703B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20354—Non-comb or non-interdigital filters
    • H01P1/20381—Special shape resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE: The dielectric filter is provided to facilitate the grinding work to implement the trim part of the filter, and exactly determine the position of the above trim part or the thickness of cut-out conductor coating. CONSTITUTION: The filter comprises multiple resonance holes (110) within it, the dielectric body (120) plasticizing electric polarization with field, the conductor coating (130) covered on the surface of the dielectric body (120), the input terminal (140) and output terminal (150) equipped through the partial grinding processing of the conductor coating (130), and the trim part (160) having a given capacitance (CS) value through the grinding processing of the inside of the multiple resonance holes (110) in the shape of a ring. The penetrating resonance hole (110) is formed in a shape which becomes narrower starting from the top and bottom to the center. The trim part (160) is implemented by the ring-shape grinding processing of the conductor coating (130) located in inner circumference of the center of the above resonance hole (110) of the smallest diameter.

Description

유전체 필터Dielectric filter

본 발명은 유전체 필터에 관한 것으로, 더욱 상세하게는 전계에 의하여 전기분극을 유기시키는 유전체 몸체부의 내부에 구비된 복수 개의 공진홀을 상단 및 하단으로부터 중심부로 갈수록 직경이 좁아지는 형상으로 관통 성형한 후, 상기 공진홀의 직경이 가장 작은 중심부의 내주연에 위치된 도체피복을 링형상으로 그라인딩 가공하여 트림부를 구현한 유전체 필터에 관한 것이다.The present invention relates to a dielectric filter, and more particularly, through a plurality of resonant holes provided in the dielectric body part for inducing electrical polarization by an electric field in a shape in which the diameter becomes narrower from the top and bottom to the center. The present invention relates to a dielectric filter implementing a trim part by grinding a conductor coating located at an inner circumference of a central portion having the smallest diameter of the resonance hole in a ring shape.

일반적으로 유전체 필터(10)는 도 1 및 도 2에 도시된 바와 같이, 내부에 복수 개의 공진홀(11)을 구비하며 전계에 의하여 전기분극을 유기시키는 대략 장방체 형상의 유전체 몸체부(12)와, 상기 유전체 몸체부(12)의 표면에 도금된 도체피복(13)과, 상기 도체피복(13)을 부분 그라인딩(grinding) 가공하여 구비된 입력단자(14) 및 출력단자(15)와, 상기 복수 개의 공진홀(11)의 내면을 링형상으로 그라인딩 가공하여 구비되어 소정의 커패시턴스(CS) 값을 갖는 트림부(16)로 이루어진다.Generally, as illustrated in FIGS. 1 and 2, the dielectric filter 10 includes a plurality of resonant holes 11 therein and a substantially rectangular dielectric body portion 12 that induces electrical polarization by an electric field. A conductor coating 13 plated on the surface of the dielectric body part 12, an input terminal 14 and an output terminal 15 provided by partially grinding the conductor coating 13, and the The inner surfaces of the plurality of resonance holes 11 are formed by grinding the ring to form a trim part 16 having a predetermined capacitance C S.

이때, 상기 복수 개의 공진홀(11)은 상기 유전체 몸체부(12)의 길이방향으로 상호 수평간격을 유지하며 대략 원통형상으로 관통 성형되고, 이 공진홀(11)의 내주연은 도체피복(13)으로 도금되어 있는 데, 이 도체피복(13)은 그라인딩 가공을 통하여 링형상으로 부분 깍여져 트림부(16)을 구현하게 되고, 통상적으로 공진홀(11)의 직경은 유도용량을 갖고, 상기 공진홀(11)의 내주연으로부터 도체피복(13)의 표면까지의 거리는 정전용량을 갖는 것이 일반적이다.At this time, the plurality of resonant holes 11 are formed in a substantially cylindrical shape while maintaining horizontal horizontal intervals in the longitudinal direction of the dielectric body portion 12, and the inner circumference of the resonant holes 11 is a conductor coating (13) The conductor coating 13 is partially cut into a ring shape through the grinding process to implement the trim portion 16. Typically, the diameter of the resonance hole 11 has an induction capacity. The distance from the inner circumference of the resonance hole 11 to the surface of the conductor coating 13 generally has a capacitance.

그런데, 종래 기술에 따른 유전체 필터(10)는 소정의 커패시턴스(CS) 값을 갖는 트림부(16)를 유전체 몸체부(12)의 내부에 관통 성형된 원통형상의 공진홀(11)의 내주연에 그라인딩 가공을 통하여 링형상으로 성형하므로 인하여, 그 가공작업이 어렵고, 또한 도체피복(13)을 깍는 가공깊이 및 두께 조절이 난해하여 제품의 불량이 빈번히 초래되어 생산성이 크게 떨어지는 커다란 문제점이 있었다.However, the dielectric filter 10 according to the related art has an inner circumference of the cylindrical resonance hole 11 formed by penetrating a trim 16 having a predetermined capacitance C S in the dielectric body 12. Due to the molding in the shape of a ring through the grinding process, the machining work is difficult, and the depth and thickness control of the conductor coating 13 is difficult to cut, causing frequent defects in the product, thereby greatly reducing productivity.

이에, 본 발명은 상기와 같은 제반 문제점을 해결하기 위하여 창출된 것으로, 그 목적으로 하는 바는 트림부를 구현하기 위한 그라인딩 작업을 용이하게 할 수 있음과 동시에 상기 트림부의 위치 및 도체피복을 깍는 두께 등을 정확히 맞출 수 있는 유전체 필터를 제공함에 있다.Accordingly, the present invention was created to solve the above problems, and the object of the present invention is to facilitate the grinding operation for implementing the trim part, and at the same time, to cut the position of the trim part and the thickness of the conductor coating. It is to provide a dielectric filter that can be precisely matched.

도 1은 종래 기술에 따른 유전체 필터를 나타내는 사시도.1 is a perspective view showing a dielectric filter according to the prior art.

도 2는 종래 기술에 따른 유전체 필터를 나타내는 단면도.2 is a cross-sectional view showing a dielectric filter according to the prior art.

도 3은 본 발명에 따른 유전체 필터를 나타내는 사시도.3 is a perspective view showing a dielectric filter according to the present invention;

도 4는 본 발명에 따른 유전체 필터를 나타내는 단면도.4 is a sectional view showing a dielectric filter according to the present invention;

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

100 : 유전체 필터 110 : 공진홀100 dielectric filter 110 resonant hole

120 : 유전체 몸체부 130 : 도체피복120: dielectric body portion 130: conductor coating

140 : 입력단자 150 : 출력단자140: input terminal 150: output terminal

160 : 트림부 CS: 커패시턴스160: trim portion C S : capacitance

상기 목적을 달성하기 위한 본 발명은, 적어도 내부에 복수 개의 공진홀을 구비하며 전계에 의하여 전기분극을 유기시키는 유전체 몸체부와, 상기 유전체 몸체부의 표면에 도금된 도체피복과, 상기 복수 개의 공진홀의 내면을 링형상으로 그라인딩 가공하여 소정의 커패시턴스 값을 갖는 트림부를 포함하여 이루어진 유전체 필터에 있어서, 상기 공진홀은 상단 및 하단으로부터 중심부로 갈수록 직경이 좁아지는 형상으로 관통 성형되고, 상기 트림부는 직경이 가장 작은 상기 공진홀 중심부의 내주연에 위치된 상기 도체피복을 링형상으로 그라인딩 가공하여 구현되는 것을 그 기술적 구성상의 기본 특징으로 한다.According to an aspect of the present invention, there is provided a dielectric body having at least a plurality of resonant holes therein and inducing electrical polarization by an electric field, a conductor coating plated on a surface of the dielectric body, and a plurality of resonant holes. A dielectric filter including a trim part having a predetermined capacitance value by grinding an inner surface in a ring shape, wherein the resonance hole is formed through a shape in which the diameter becomes narrower from the top and the bottom to the center, and the trim part has a diameter. The basic feature of the technical configuration is that the conductor coating located at the inner circumference of the center of the smallest resonance hole is implemented by grinding the conductor coating in a ring shape.

이하, 본 발명에 따른 유전체 필터의 바람직한 실시예를 도 3을 참조하여 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the dielectric filter according to the present invention will be described with reference to FIG. 3.

도 3은 본 발명에 따른 유전체 필터를 나타내는 사시도이고, 도 4는 본 발명에 따른 유전체 필터를 나타내는 단면도이다.3 is a perspective view showing a dielectric filter according to the present invention, Figure 4 is a cross-sectional view showing a dielectric filter according to the present invention.

본 발명에 따른 유전체 필터(100)는 도 3 및 도 4에 도시된 바와 같이, 내부에 복수 개의 공진홀(110)을 구비하며 전계에 의하여 전기분극을 유기시키는 유전체 몸체부(120)와, 상기 유전체 몸체부(120)의 표면에 도금된 도체피복(130)과, 상기 도체피복(130)을 부분 그라인딩 가공하여 구비된 입력단자(140) 및 출력단자(150)와, 상기 복수 개의 공진홀(110)의 내면을 링형상으로 그라인딩 가공하여 소정의 커패시턴스(CS) 값을 갖는 트림부(160)로 이루어진다.As shown in FIGS. 3 and 4, the dielectric filter 100 according to the present invention includes a dielectric body 120 having a plurality of resonance holes 110 therein and inducing electrical polarization by an electric field. A conductor coating 130 plated on the surface of the dielectric body 120, an input terminal 140 and an output terminal 150 provided by partially grinding the conductor coating 130, and the plurality of resonance holes ( Grinding the inner surface of the 110 in a ring shape made of a trim 160 having a predetermined capacitance (C S ) value.

이때, 상기 공진홀(110)은 상단 및 하단으로부터 중심부로 갈수록 직경이 좁아지는 형상으로 관통 성형되고, 상기 트림부(160)는 직경이 가장 작은 상기 공진홀(110) 중심부의 내주연에 위치된 상기 도체피복(130)을 링형상으로 그라인딩 가공하여 구현된다.In this case, the resonator hole 110 is formed through the shape that the diameter narrows toward the center from the top and bottom, the trim portion 160 is located on the inner circumference of the center of the resonator hole 110 having the smallest diameter The conductor coating 130 is implemented by grinding the ring shape.

여기서, 상기 공진홀(110)은 상단 및 하단으로부터 중심부로 갈수록 직경이 좁아지는 형상으로 관통 성형되어 소정의 커패시턴스(CS) 값을 갖는 트림부(160)를 구현하기 위하여 도체피복(130)을 그라인딩 가공할 경우 도 4에 도시된 점선부분만을 간단히 제거하여 트림부(160)를 제작할 수 있게 되어 그 그라인딩 작업이 매우 용이하게 이루어질 수 있는 작용이 있음을 알 수 있다.Here, the resonator hole 110 is formed through the shape of the narrower diameter from the upper end and the lower end toward the center to form a conductor coating 130 to implement the trim 160 having a predetermined capacitance (C S ) value In the case of grinding, it can be seen that the trim part 160 can be manufactured by simply removing the dotted line portion shown in FIG.

이상에서와 같이 본 발명에 따른 유전체 필터에 의하면, 전계에 의하여 전기분극을 유기시키는 유전체 몸체부의 내부에 구비된 복수 개의 공진홀을 상단 및 하단으로부터 중심부로 갈수록 직경이 좁아지는 형상으로 관통 성형한 후, 상기 공진홀의 직경이 가장 작은 중심부의 내주연에 위치된 도체피복을 링형상으로 그라인딩 가공하여 트림부를 구현하므로써, 트림부를 구현하기 위한 그라인딩 작업이 매우 용이하고 상기 트림부의 위치 및 도체피복을 깍는 두께 등을 정확히 맞출 수 있게 되어 양질의 제품을 불량없이 대량 생산할 수 있는 탁월한 효과가 있다.As described above, according to the dielectric filter according to the present invention, after through-molding a plurality of resonant holes provided in the dielectric body part for inducing electrical polarization by an electric field in a shape that becomes narrower from the top and bottom to the center By implementing the trim by grinding the conductor coating located at the inner circumference of the central portion having the smallest diameter of the resonant hole in a ring shape, grinding work for realizing the trim is very easy and the thickness of the trim part and the conductor coating are cut. Being able to precisely fit the back has the excellent effect of mass production of high quality products without defects.

Claims (1)

적어도 내부에 복수 개의 공진홀을 구비하며 전계에 의하여 전기분극을 유기시키는 유전체 몸체부와, 상기 유전체 몸체부의 표면에 도금된 도체피복과, 상기 복수 개의 공진홀의 내면을 링형상으로 그라인딩 가공하여 소정의 커패시턴스 값을 갖는 트림부를 포함하여 이루어진 유전체 필터에 있어서,A dielectric body having at least a plurality of resonant holes therein and inducing electrical polarization by an electric field, a conductor coating plated on the surface of the dielectric body, and grinding the inner surfaces of the plurality of resonant holes in a ring shape to provide a predetermined shape. In the dielectric filter comprising a trim having a capacitance value, 상기 공진홀은 상단 및 하단으로부터 중심부로 갈수록 직경이 좁아지는 형상으로 관통 성형되고,The resonator hole is formed through the shape in which the diameter narrows toward the center from the top and bottom, 상기 트림부는 직경이 가장 작은 상기 공진홀 중심부의 내주연에 위치된 상기 도체피복을 링형상으로 그라인딩 가공하여 구현되는 것을 특징으로 하는 유전체 필터.And the trim part is formed by grinding the conductor coating located at the inner circumference of the center of the resonance hole having the smallest diameter in a ring shape.
KR1019980033058A 1998-08-14 1998-08-14 Dielectric filter KR100283703B1 (en)

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KR100283703B1 KR100283703B1 (en) 2001-03-02

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