KR100265299B1 - A dielectric filter - Google Patents

A dielectric filter Download PDF

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Publication number
KR100265299B1
KR100265299B1 KR1019980014142A KR19980014142A KR100265299B1 KR 100265299 B1 KR100265299 B1 KR 100265299B1 KR 1019980014142 A KR1019980014142 A KR 1019980014142A KR 19980014142 A KR19980014142 A KR 19980014142A KR 100265299 B1 KR100265299 B1 KR 100265299B1
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South Korea
Prior art keywords
dielectric
dielectric filter
plate
substance body
body portion
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KR1019980014142A
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Korean (ko)
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KR19990080704A (en
Inventor
손영일
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원대철
주식회사이엠코
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Priority to KR1019980014142A priority Critical patent/KR100265299B1/en
Publication of KR19990080704A publication Critical patent/KR19990080704A/en
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Publication of KR100265299B1 publication Critical patent/KR100265299B1/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/201Filters for transverse electromagnetic waves
    • H01P1/205Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2056Comb filters or interdigital filters with metallised resonator holes in a dielectric block
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/201Filters for transverse electromagnetic waves
    • H01P1/205Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2053Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/207Hollow waveguide filters
    • H01P1/208Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • H01P1/2084Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00Resonators of the waveguide type
    • H01P7/10Dielectric resonators

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

Abstract

PURPOSE: Disclosed is a dielectric filter capable of showing an excellent attenuation specific by attaching a dielectric plate and a conductive plate to a lower surface of the dielectric substance body. CONSTITUTION: The dielectric filter comprises a dielectric substance body(12) having a rectangular shape, an input terminal(14) and an output terminal(15). The dielectric substance body(12) includes a plurality of through holes therein and generates an electric polarization due to the electric field. The input terminal(14) and the output terminal(15) are embodied by partially grinding a conductive coating applied onto a surface of the dielectric substance body(12). A rectangular shape of dielectric plate(17) is attached to the lower surface of the dielectric substance body(12). Also, A rectangular shape of conductive plate(18) is attached to the lower surface of the dielectric substance body(12).

Description

유전체 필터Dielectric filter

본 발명은 유전체 필터에 관한 것으로, 더욱 상세하게는 전계에 의하여 전기분극을 유기시키는 대략 장방체 형상의 유전체 몸체부의 하면에 소정의 커패시턴스를 갖을 수 있도록 유전체판 및 도체판을 순차 부착한 유전체 필터에 관한 것이다.The present invention relates to a dielectric filter, and more particularly, to a dielectric filter in which a dielectric plate and a conductor plate are sequentially attached to have a predetermined capacitance on a lower surface of a substantially rectangular dielectric body part for inducing electrical polarization by an electric field. will be.

일반적으로 유전체 필터(10)는 도 1 및 도 2에 도시된 바와 같이, 내부에 복수 개의 관통홀(11)을 구비하며 전계에 의하여 전기분극을 유기시키는 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 관통홀(11)의 내면에 링형상으로 그라인딩 가공되어 소정의 커패시턴스(CS) 값을 갖는 트림부(16)로 이루어진다.Generally, as shown in FIGS. 1 and 2, the dielectric filter 10 includes a plurality of through holes 11 therein and a dielectric body part 12 for inducing electrical polarization by an electric field, and the dielectric body. A conductor coating 13 plated on the surface of the part 12, an input terminal 14 and an output terminal 15 which are provided by partially grinding the conductor coating 13, and the plurality of through holes. The inner surface of the (11) is formed by a trimming part 16 having a ring shape and having a predetermined capacitance C S value.

이때, 상기 복수 개의 관통홀(11)은 상기 유전체 몸체부(12)의 길이방향으로 상호 수평간격을 유지하며 관통 성형되고, 이 관통홀(11)의 표면은 도체피복(13)으로 도금되어 있는 데, 이 도체피복(13)은 그라인딩 가공을 통하여 링형상으로 부분 깍여져 트림부(16)가 구비되고, 통상 상기 관통홀(11)의 직경은 유도용량을 갖고, 상기 관통홀(11)의 내주연으로부터 도체피복(13)까지의 거리는 정전용량을 갖는 것이 일반적이다.At this time, the plurality of through-holes 11 are formed through the horizontal body in the longitudinal direction of the dielectric body portion 12, the through-molded, the surface of the through-hole 11 is plated with a conductor coating (13) However, the conductor coating 13 is partially cut into a ring shape through a grinding process, and is provided with a trim portion 16. Usually, the diameter of the through hole 11 has an inductive capacity, and the diameter of the through hole 11 The distance from the inner circumference to the conductor coating 13 generally has a capacitance.

그런데, 종래 기술에 따른 유전체 필터(10)는 도 3에 도시된 바와 같이, 감쇄특성이 우수하지 못하여 이를 극복하기 위한 수단으로 추가적인 회로를 구성하여야만 하여 비용상승 및 크기의 증대 등이 발생되는 커다란 단점이 있었다.However, as shown in FIG. 3, the dielectric filter 10 according to the related art does not have excellent attenuation characteristics, and thus a large disadvantage in that a cost increase and an increase in size are required because an additional circuit must be configured as a means for overcoming this. There was this.

이에, 본 발명은 상기와 같은 제반 문제점을 해결하기 위하여 창출된 것으로, 그 목적으로 하는 바는 전계에 의하여 전기분극을 유기시키는 대략 장방체 형상의 유전체 몸체부의 하면에 소정의 커패시턴스를 갖을 수 있도록 유전체판 및 도체판을 순차 부착하여 감쇄특성이 우수한 유전체 필터를 제공함에 있다.Accordingly, the present invention has been made to solve the above problems, and its purpose is to provide a dielectric plate having a predetermined capacitance on the lower surface of the dielectric body portion having a substantially rectangular shape that induces electrical polarization by an electric field. And providing a dielectric filter having excellent attenuation characteristics by sequentially attaching a conductor plate.

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 도 1의 a-a 단면도.2 is a cross-sectional view of FIG.

도 3은 종래 기술에 따른 유전체 필터의 감쇄특성을 나타내는 그래프.3 is a graph showing the attenuation characteristics of the dielectric filter according to the prior art.

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

도 5는 본 발명에 따른 유전체 필터를 나타내는 등가 회로도.5 is an equivalent circuit diagram showing a dielectric filter according to the present invention.

도 6은 본 발명에 따른 유전체 필터의 감쇄특성을 나타내는 그래프.6 is a graph showing the attenuation characteristics of the dielectric filter according to the present invention.

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

10 : 유전체 필터 11 : 관통홀10 dielectric filter 11 through hole

12 : 유전체 몸체부 13 : 도체피복12: dielectric body portion 13: conductor coating

14 : 입력단자 15 : 출력단자14: input terminal 15: output terminal

16 : 트림부 17 : 유전체판16 trim portion 17 dielectric plate

18 : 도체판18: conductor plate

상기 목적을 달성하기 위한 본 발명은, 적어도 내부에 복수 개의 관통홀을 구비하며 전계에 의하여 전기분극을 유기시키는 대략 장방체 형상의 유전체 몸체부와, 상기 유전체 몸체부의 표면에 도금된 도체피복을 부분 그라인딩 가공하여 구현된 입력단자 및 출력단자를 포함하여 이루어진 유전체 필터에 있어서, 상기 유전체 몸체부의 하면의 면적에 일치되어 부착된 장방형의 유전체판과, 상기 유전체판의 하면에 부착되어 소정의 결합 커패시턴스 값을 갖는 장방형의 도체판을 구비하여 이루어지는 것을 그 기술적 구성상의 기본 특징으로 한다.The present invention for achieving the above object, at least a portion having a plurality of through-holes in the inside and the dielectric body portion of the substantially rectangular shape to induce electrical polarization by the electric field, and partially ground the conductive coating plated on the surface of the dielectric body portion A dielectric filter comprising an input terminal and an output terminal implemented by processing, comprising: a rectangular dielectric plate attached to match the area of the lower surface of the dielectric body portion, and a predetermined coupling capacitance value attached to the lower surface of the dielectric plate. What comprises the rectangular conductor plate which has is made the basic feature on the technical structure.

이하, 본 발명에 따른 유전체 필터의 바람직한 실시예를 도 4 내지 도 6을 참조하여 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the dielectric filter according to the present invention will be described with reference to FIGS. 4 to 6.

도 4는 본 발명에 따른 유전체 필터를 나타내는 사시도이고, 도 5는 본 발명에 따른 유전체 필터를 나타내는 등가 회로도이고, 도 6은 본 발명에 따른 유전체 필터의 감쇄특성을 나타내는 그래프이고, 종래 구성과 동일 작용을 하는 동일 구성에 대해서는 동일 명칭 및 동일 부호를 병기 사용하기로 한다.Figure 4 is a perspective view showing a dielectric filter according to the present invention, Figure 5 is an equivalent circuit diagram showing a dielectric filter according to the present invention, Figure 6 is a graph showing the attenuation characteristics of the dielectric filter according to the present invention, the same as the conventional configuration About the same structure which acts, it uses the same name and the same code | symbol.

본 발명에 따른 유전체 필터(10)는 도 4에 도시된 바와 같이, 내부에 대략 원통형상의 관통홀(11)을 구비하며 전계에 의하여 전기분극을 유기시키는 유전체 몸체부(12)와, 상기 유전체 몸체부(12)의 표면에 도금된 도체피복(13)과, 상기 도체피복(13)을 부분 그라인딩 가공하여 구비된 입력단자(14) 및 출력단자(15)와, 상기 복수 개의 관통홀(11)의 내면에 링형상으로 그라인딩 가공되어 소정의 커패시턴스 값을 갖는 트림부(16)로 이루어진다.As shown in FIG. 4, the dielectric filter 10 according to the present invention includes a dielectric body portion 12 having an approximately cylindrical through hole 11 therein and inducing electrical polarization by an electric field, and the dielectric body. A conductor coating 13 plated on the surface of the part 12, an input terminal 14 and an output terminal 15 provided by partially grinding the conductor coating 13, and the plurality of through holes 11; The inner surface of the ring is ground in a ring shape to form a trim portion 16 having a predetermined capacitance value.

이때, 상기 유전체 몸체부(12)의 하면에는 장방형의 유전체판(17)이 부착되고, 상기 유전체판(17)의 하면에는 소정의 결합 커패시턴스 값을 갖는 장방형의 도체판(18)이 구비된다.At this time, a rectangular dielectric plate 17 is attached to the lower surface of the dielectric body portion 12, and a rectangular conductor plate 18 having a predetermined coupling capacitance value is provided on the lower surface of the dielectric plate 17.

여기서, 상기 유전체 몸체부(12)의 하면에 소정의 결합 커패시턴스 값을 갖는 유전체판(17) 및 도체판(18)이 부착되므로써 도 5와 같은 등가회로를 구현할 수 있게 되어, 결국 도 6에 도시된 바와 같은 뛰어난 감쇄특성을 얻을 수 있음을 알 수 있다.Here, by attaching the dielectric plate 17 and the conductor plate 18 having a predetermined coupling capacitance value to the lower surface of the dielectric body portion 12, it is possible to implement the equivalent circuit as shown in FIG. It can be seen that the excellent attenuation characteristics as shown.

즉, 유전체 필터(10)의 쇼트면에 커패시턴스를 추가하므로써 중심 주파수를 중심으로 낮은 대역 및 높은 대역의 감쇄특성이 뛰어나 양질의 제품을 수득할 수 있게 되는 것이다.That is, by adding capacitance to the short surface of the dielectric filter 10, it is possible to obtain a high quality product with excellent attenuation characteristics of a low band and a high band around a center frequency.

이상에서와 같이 본 발명에 따른 유전체 필터에 의하면, 복수 개의 관통홀을 구비하며 전계에 의하여 전기분극을 유기시키는 대략 장방체 형상의 유전체 몸체부의 하면에 소정의 커패시턴스를 갖을 수 있도록 유전체판 및 도체판을 순차 부착하므로써, 공진 주파수의 고역 및 저역에서의 우수한 감쇄특성을 얻을 수 있는 탁월한 효과가 있다.As described above, according to the dielectric filter according to the present invention, the dielectric plate and the conductor plate are provided to have a predetermined capacitance on the lower surface of the dielectric body part having a plurality of through holes and inducing electrical polarization by an electric field. By sequential attachment, there is an excellent effect of obtaining excellent attenuation characteristics at high and low frequencies of the resonance frequency.

Claims (1)

적어도 내부에 복수 개의 관통홀을 구비하며 전계에 의하여 전기분극을 유기시키는 대략 장방체 형상의 유전체 몸체부와, 상기 유전체 몸체부의 표면에 도금된 도체피복을 부분 그라인딩 가공하여 구현된 입력단자 및 출력단자를 포함하여 이루어진 유전체 필터에 있어서,An input terminal and an output terminal having at least a plurality of through holes therein and partially grinding a dielectric body portion having a substantially rectangular shape to induce electrical polarization by an electric field, and a conductive coating plated on the surface of the dielectric body portion. In the dielectric filter comprising, 상기 유전체 몸체부의 하면의 면적에 일치되어 부착된 장방형의 유전체판과,A rectangular dielectric plate attached to match the area of the lower surface of the dielectric body portion; 상기 유전체판의 하면에 부착되어 소정의 결합 커패시턴스 값을 갖는 장방형의 도체판을 구비하여 이루어지는 것을 특징으로 하는 유전체 필터.And a rectangular conductor plate attached to a lower surface of the dielectric plate and having a predetermined coupling capacitance value.
KR1019980014142A 1998-04-21 1998-04-21 A dielectric filter KR100265299B1 (en)

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KR1019980014142A KR100265299B1 (en) 1998-04-21 1998-04-21 A dielectric filter

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KR100265299B1 true KR100265299B1 (en) 2000-09-15

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