KR100265300B1 - A dielectric filter - Google Patents

A dielectric filter Download PDF

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Publication number
KR100265300B1
KR100265300B1 KR1019980014143A KR19980014143A KR100265300B1 KR 100265300 B1 KR100265300 B1 KR 100265300B1 KR 1019980014143 A KR1019980014143 A KR 1019980014143A KR 19980014143 A KR19980014143 A KR 19980014143A KR 100265300 B1 KR100265300 B1 KR 100265300B1
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South Korea
Prior art keywords
hole
holes
dielectric filter
dielectric
rods
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KR1019980014143A
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Korean (ko)
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KR19990080705A (en
Inventor
손영일
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원대철
주식회사이엠코
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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
    • H01P1/2053Comb 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
    • H01P1/201Filters 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
    • H01P1/207Hollow 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 controlling a capacitance value by simply adjusting a gap between upper rods and lower rods which are fitted into a plurality of through holes. CONSTITUTION: The dielectric filter comprises a dielectric substance body(120) having a cylindrical shape and a conductive coating(130) applied onto the surface of the dielectric substance body(120) except for a cylindrical shape of through hole(110). The dielectric substance body(12) includes the through holes(110) therein and generates an electric polarization due to the electric field. Upper rods(161) are fitted into the through holes(110), respectively. Also, lower rods(162) are fitted into the through holes(110), respectively. The upper rods(161) and the lower rods(162) are coated with conductive materials. In the through holes(110), the upper rods(161) are spaced from the lower rods(162) at a predetermined gap.

Description

유전체 필터Dielectric filter

본 발명은 유전체 필터에 관한 것으로, 더욱 상세하게는 유전체 몸체부의 내부에 구비된 복수 개의 관통홀에 끼움 장착된 상부봉 및 하부봉의 이격된 간격을 통하여 소정의 커패시턴스 값을 갖도록 구성한 유전체 필터에 관한 것이다.The present invention relates to a dielectric filter, and more particularly, to a dielectric filter configured to have a predetermined capacitance value through a spaced interval between upper and lower rods fitted in a plurality of through holes provided in the dielectric body. .

일반적으로 유전체 필터(10)는 도 1 및 도 2에 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(grinding) 가공하여 구현된 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 has a substantially cylindrical through-hole 11 therein, and a dielectric body portion 12 for inducing electrical polarization by an electric field, and the dielectric. A conductor coating 13 plated on the surface of the body portion 12, an input terminal 14 and an output terminal 15 implemented by partially grinding the conductor coating 13, and the plurality of through The inner surface of the hole 11 is ground in a ring shape to form a trim portion 16 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)을 구비하게 되며, 통상적으로 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 the grinding process to have the trim portion 16. Typically, the diameter of the through hole 11 has an inductive capacity, and the through hole 11 It is common for the distance from the inner circumference of the wire to the conductor coating 13 to have a capacitance.

그런데, 종래 기술에 따른 유전체 필터(10)는 도 2에 도시된 바와 같이, 소정의 커패시턴스(CS) 값을 갖는 트림부(16)를 유전체 몸체부(12)의 내부에 관통 성형된 원통형상의 관통홀(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 a cylindrical shape in which a trim 16 having a predetermined capacitance C S is formed through the inside of the dielectric body 12 as shown in FIG. 2. Since the inner periphery of the through-hole 11 is molded into a ring shape through grinding, the machining work is difficult, and the depth and thickness of the conductor coating 13 are difficult to cut so that product defects are frequently caused. There was a big problem with this greatly falling.

이에, 본 발명은 상기와 같은 제반 문제점을 해결하기 위하여 창출된 것으로, 그 목적으로 하는 바는 복수 개의 관통홀에 끼움 장착된 상부봉 및 하부봉의 이격된 간격을 통하여 소정의 커패시턴스 값을 갖도록 구성하여 간단한 조립작업으로 커패시턴스 값을 조절할 수 있는 유전체 필터를 제공함에 있다.Thus, the present invention was created to solve the above problems, and the object is to have a predetermined capacitance value through the spaced interval of the upper and lower rods fitted in the plurality of through-holes A simple assembly operation provides a dielectric filter that can adjust capacitance values.

도 1은 일반적인 유전체 필터를 나타내는 사시도.1 is a perspective view showing a general dielectric filter.

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 요부 단면을 포함한 분해 사시도.3 is an exploded perspective view including a main cross section 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 : 관통홀100 dielectric filter 110 through hole

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

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

161 : 상부봉 162 : 하부봉161: upper rod 162: lower rod

ℓ : 간격ℓ: interval

상기 목적을 달성하기 위한 본 발명은, 내부에 대략 원통형상의 관통홀을 구비하며 전계에 의하여 전기분극을 유기시키는 유전체 몸체부와, 상기 관통홀을 제외한 상기 유전체 몸체부의 표면에 도금된 도체피복을 포함하여 이루어진 유전체 필터에 있어서, 상기 관통홀의 상부에 맞춤 끼워져 상기 도체피복이 도금된 상부봉과, 상기 상부봉으로부터 소정의 간격만큼 이격되어 상기 관통홀의 하부에 맞춤 끼워져 상기 도체피복이 도금된 하부봉을 포함하여 이루어지는 것을 그 기술적 구성상의 기본 특징으로 한다.The present invention for achieving the above object includes a dielectric body portion having a substantially cylindrical through hole therein and inducing electrical polarization by an electric field, and a conductor coating plated on the surface of the dielectric body portion except for the through hole. A dielectric filter comprising: an upper rod fitted over an upper portion of the through hole and plated with the conductor coating, and a lower rod fitted over the lower portion of the through hole spaced apart from the upper rod by a predetermined interval. It is made into the basic feature on the technical structure.

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 요부 단면을 포함한 분해 사시도이다.3 is an exploded perspective view including a main section of the dielectric filter according to the present invention.

본 발명에 따른 유전체 필터(100)는 도 3에 도시된 바와 같이, 내부에 대략 원통형상의 관통홀(110)을 구비하며 전계에 의하여 전기분극을 유기시키는 유전체 몸체부(120)와, 상기 관통홀(110)을 제외한 상기 유전체 몸체부(120)의 표면에 도금된 도체피복(130)과, 상기 도체피복(130)을 부분 그라인딩 가공하여 구현된 입력단자(140) 및 출력단자(150)와, 상기 관통홀(110)의 상부에 맞춤 끼워져 상기 도체피복(130)이 도금된 상부봉(161)과, 상기 상부봉(161)으로부터 소정의 간격(ℓ)만큼 이격되어 상기 관통홀(110)의 하부에 맞춤 끼워져 상기 도체피복(130)이 도금된 하부봉(162)으로 이루어진다.As shown in FIG. 3, the dielectric filter 100 according to the present invention has a substantially cylindrical through-hole 110 therein, and a dielectric body 120 for inducing electrical polarization by an electric field, and the through-hole. A conductor coating 130 plated on the surface of the dielectric body 120 except for 110, an input terminal 140 and an output terminal 150 implemented by partially grinding the conductor coating 130, and The upper rod 161 is fitted into the upper portion of the through hole 110 and the conductor coating 130 is plated, and is spaced apart from the upper rod 161 by a predetermined distance (L). Fit to the bottom is made of a lower rod 162, the conductor coating 130 is plated.

이때, 상기 하부봉(162)은 상단부를 제외한 나머지 부분만을 도체피복(130)으로 도금하여 사용하기도 한다.In this case, the lower rod 162 may be used by plating only the remaining portion except the upper portion with the conductor coating 130.

여기서, 소정의 커패시턴스(CS) 값을 얻기 위하여 종래에는 복수 개의 관통홀(110)의 내면에 링형상으로 그라인딩 가공하여 트림부를 형성하였는 데 반하여, 본 발명에서는 도체피복(130)이 도금된 상부봉(161) 및 하부봉(162)의 이격된 간격(ℓ)에 의하여 상기 트림부의 기능을 수행할 수 있게 되어 종래의 그라인딩 가공시의 어려운 작업을 간단히 수행할 수 있음을 알 수 있다.Here, in order to obtain a predetermined value of capacitance (C S ), conventionally, a trim is formed by grinding the inner surface of the plurality of through holes 110 in a ring shape, whereas in the present invention, the upper portion of the conductive coating 130 is plated. It can be seen that it is possible to perform the function of the trim part by the spaced apart interval (l) of the rod 161 and the lower rod 162 to simply perform a difficult task in the conventional grinding process.

즉, 유전체 몸체부(120)에 미리 복수 개의 관통홀(110)을 구비시킴과 동시에 도체피복(130)이 도금된 별도의 상부봉(161) 및 하부봉(162)을 구비시켜 간단한 조립작업을 통하여 유전체 필터(100)를 구현할 수 있게 되는 것이다.That is, a plurality of through holes 110 are provided in the dielectric body 120 in advance, and at the same time, a separate upper rod 161 and a lower rod 162 plated with the conductor coating 130 are provided for simple assembly operation. Through the dielectric filter 100 will be able to be implemented.

이상에서와 같이 본 발명에 따른 유전체 필터에 의하면, 유전체 몸체부의 내부에 구비된 복수 개의 관통홀에 끼움 장착된 상부봉 및 하부봉의 이격된 간격을 통하여 소정의 커패시턴스 값을 갖도록 구성하여 간단한 조립작업으로 유전체 필터를 구현할 수 있는 탁월한 효과가 있다.As described above, according to the dielectric filter according to the present invention, it is configured to have a predetermined capacitance value through a spaced interval between the upper rod and the lower rod fitted in the plurality of through holes provided in the dielectric body part, thereby simplifying the assembly operation. There is an excellent effect to implement a dielectric filter.

또한, 상기 상부봉 및 하부봉의 길이 및 부피의 변화로 상기 커패시턴스 값을 유용하게 조절할 수 있는 유용한 효과가 있다.In addition, there is a useful effect that the capacitance value can be usefully adjusted by changing the length and volume of the upper and lower rods.

Claims (1)

내부에 대략 원통형상의 관통홀을 구비하며 전계에 의하여 전기분극을 유기시키는 유전체 몸체부와, 상기 관통홀을 제외한 상기 유전체 몸체부의 표면에 도금된 도체피복을 포함하여 이루어진 유전체 필터에 있어서,A dielectric filter having a substantially cylindrical through hole therein and comprising a dielectric body portion for inducing electrical polarization by an electric field, and a conductive coating plated on a surface of the dielectric body portion excluding the through hole. 상기 관통홀의 상부에 맞춤 끼워져 상기 도체피복이 도금된 상부봉과,An upper rod fitted with an upper portion of the through hole and plated with the conductor coating; 상기 상부봉으로부터 소정의 간격만큼 이격되어 상기 관통홀의 하부에 맞춤 끼워져 상기 도체피복이 도금된 하부봉을 포함하여 이루어지는 것을 특징으로 하는 유전체 필터.And a lower rod that is spaced apart from the upper rod by a predetermined interval and fits into a lower portion of the through hole and is plated with the conductor coating.
KR1019980014143A 1998-04-21 1998-04-21 A dielectric filter KR100265300B1 (en)

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KR100265300B1 true KR100265300B1 (en) 2000-09-15

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