KR20010018613A - A dielectric filter - Google Patents

A dielectric filter Download PDF

Info

Publication number
KR20010018613A
KR20010018613A KR1019990034639A KR19990034639A KR20010018613A KR 20010018613 A KR20010018613 A KR 20010018613A KR 1019990034639 A KR1019990034639 A KR 1019990034639A KR 19990034639 A KR19990034639 A KR 19990034639A KR 20010018613 A KR20010018613 A KR 20010018613A
Authority
KR
South Korea
Prior art keywords
dielectric
dielectric body
body section
conductor coating
body portion
Prior art date
Application number
KR1019990034639A
Other languages
Korean (ko)
Inventor
황규한
Original Assignee
원대철
주식회사 이엠코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 원대철, 주식회사 이엠코 filed Critical 원대철
Priority to KR1019990034639A priority Critical patent/KR20010018613A/en
Publication of KR20010018613A publication Critical patent/KR20010018613A/en

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators

Landscapes

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

Abstract

PURPOSE: A dielectric filter is provided to completely remove noise signals introduced in low and high frequency bands by achieving the transmission zero in the high frequency band. CONSTITUTION: A dielectric filter(100) comprises a dielectric body section(110) having a plurality of resonance holes(111,112). The body section(110) has a rectangular shape. A conductive coating portion(120) is coated on the dielectric body section(110). An input terminal(131) and an output terminal(132) are provided by partially grinding process of the conductive coating portion(120). A filtering section(140) capable of improving the filtering feature is provided. In order to form the filtering section(140), the coating portion(120) is removed from an upper surface of the dielectric body section(110). Then, a part of conductive coating portion(120) coated on an upper edge of the dielectric body section(110) is removed. After that, the conductive coating portion(120) is removed in the upward direction from the front of the edge of the dielectric body section(110) to the upper surface of the dielectric body section(110). Then, the conductive coating portion(120) is removed in the downward direction from the right edge portion of the body section(110) to an underside of the body section(110) so as to obtain the output terminal(132).

Description

유전체 필터{A DIELECTRIC FILTER}Dielectric Filters {A DIELECTRIC FILTER}

본 발명은 유전체 필터에 관한 것으로, 더욱 상세하게는 신호의 통과대역 이외의 저역 또는 고역에서의 필터링 특성을 더욱 경사지게 하여 필터링 특성을 매우 좋게 할 수 있는 필터링 특성 개선부를 구비시켜 저역 또는 고역에서의 혼입되기 쉬운 불필요한 잡음신호를 완전히 제거할 수 있는 유전체 필터에 관한 것이다.The present invention relates to a dielectric filter. More particularly, the present invention relates to a dielectric filter having a filtering characteristic improvement unit capable of further inclining filtering characteristics in a low or high frequency region other than a pass band of a signal, thereby making the filtering characteristic very good. The present invention relates to a dielectric filter capable of completely eliminating unwanted noise signals that are likely to occur.

일반적으로 유전체 필터(10)는 도 1 및 도 2에 도시된 바와 같이, 내부에 원통형상의 공진홀(11)을 구비하며 전계에 의하여 전기분극을 유기시키는 유전체 몸체부(12)와, 상기 유전체 몸체부(12)의 표면에 도금된 도체피복(13)과, 상기 도체피복(13)의 부분 그라인딩(grinding) 가공을 통하여 구비되어 회로기판에 접속되는 입력단자(14) 및 출력단자(15)와, 상기 복수 개의 공진홀(11)의 내면을 링형상으로 그라인딩 가공하여 소정의 커패시턴스(CS) 값을 갖는 트림부(16)로 이루어진다.Generally, the dielectric filter 10 includes a dielectric body 12 having a cylindrical resonance hole 11 therein and inducing electrical polarization by an electric field, as shown in FIGS. 1 and 2, 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 through a partial grinding process of the conductor coating 13 and connected to a circuit board; In addition, the inner surfaces of the plurality of resonance holes 11 are formed by grinding the trim 16 having a predetermined capacitance C S by grinding the ring shape.

이때, 상기 복수 개의 공진홀(11)은 상기 유전체 몸체부(12)의 길이방향으로 상호 수평간격을 유지하며 원통형상으로 관통 성형되고, 이 공진홀(11)의 표면은 도체피복(13)으로 도금되어 있는 데, 이 도체피복(13)은 그라인딩 가공을 통하여 링형상으로 부분 깍여지게 된다. 여기서, 상기 공진홀(11)의 직경은 유도용량을 갖고, 상기 공진홀(11)의 내주연으로부터 도체피복(13)까지의 거리는 정전용량을 갖는 것이 일반적이다.At this time, the plurality of resonant holes 11 are horizontally formed in the longitudinal direction of the dielectric body portion 12 and are formed through the cylindrical shape, the surface of the resonant holes 11 to the conductor coating (13) Although plated, the conductor coating 13 is partially cut into a ring through grinding. Here, the diameter of the resonance hole 11 has an inductive capacitance, and the distance from the inner circumference of the resonance hole 11 to the conductor coating 13 generally has a capacitance.

그리고, 상기 유전체 몸체부(12)의 길이는 λ/4이며, 이 λ는 통과시키고자 하는 주파수 신호의 파장으로 정의되고, 입력단자(14) 및 출력단자(15)는 회로기판에 납땜 접속되어 사용된다.The length of the dielectric body portion 12 is λ / 4, and λ is defined as a wavelength of a frequency signal to be passed, and the input terminal 14 and the output terminal 15 are soldered and connected to a circuit board. Used.

한편, 필터는 특정한 주파수 응답특성을 만족시켜야 되는 데, 이 필터의 주파수 특성으로는 미리 결정된 중심 주파수(center frequency)와 대역폭(bandwidth)이 있으며 설계자가 개선시켜야 하는 스톱밴드(stop band) 및 반사손실(return loss) 등이 있다.On the other hand, the filter must satisfy a specific frequency response, which includes a predetermined center frequency and bandwidth, and the stop band and return loss that the designer must improve. (return loss).

최근에는 매우 작은 크기를 갖으며 우수한 특성을 갖는 필터에 대한 요구가 증가함에 따라서 극소화된 크기로서 극대화된 전기적인 특성을 갖는 유전체 필터(10)의 개발에 열중하고 있는 실정이다.Recently, as the demand for a filter having a very small size and excellent characteristics increases, there is a situation in which the dielectric filter 10 having the maximized electrical characteristics is minimized as the size is minimized.

그런데, 종래에는 상술한 바와 같은 유전체 필터(10)의 특성을 유지시키기 위하여 유전체의 Q값을 개선시키거나 공진홀(11)의 수를 증가시켜야만 되는 데, 이러한 구조는 부피가 너무 커지는 단점이 있고, 다른 한편으로 취해지는 트랜스미션 제로(transmission zero)의 추가는 트랜스미션 제로를 구현하기 위하여 유전체 필터(10)의 윗부분에 스크린 프린트된 패턴을 사용해야만 되어 비용상승 및 작업의 복잡성을 유발시키는 단점이 있었다.However, in the related art, in order to maintain the characteristics of the dielectric filter 10 as described above, it is necessary to improve the Q value of the dielectric or increase the number of the resonance holes 11, but such a structure has a disadvantage that the volume is too large. On the other hand, the addition of transmission zero, which is taken on the other hand, has to use screen-printed patterns on top of the dielectric filter 10 in order to implement transmission zero, which leads to an increase in cost and complexity of operation.

이에, 본 발명은 상기와 같은 제반 문제점을 해결하기 위하여 안출된 것으로, 그 목적으로 하는 바는 저역 또는 고역에서의 혼입되기 쉬운 불필요한 잡음신호를 완전히 제거할 수 있도록 신호의 통과대역 이외의 저역 또는 고역에서의 필터링 특성을 더욱 경사지게 하여 필터링 특성을 매우 좋게 하는 필터링 특성 개선부를 구비한 유전체 필터를 제공함에 있다.Accordingly, the present invention has been made to solve the above-mentioned problems, the object of which is that low or high band other than the passband of the signal to completely eliminate the unnecessary noise signal that is easy to be mixed in the low or high band The present invention provides a dielectric filter having a filtering characteristic improving unit which makes the filtering characteristic of the inclination more inclined to make the filtering characteristic very good.

도 1은 종래 기술에 따른 유전체 필터를 나타내는 부분 탈피(脫皮)를 포함한 사시도.1 is a perspective view including partial peeling 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 부분 탈피를 포함한 사시도.3 is a perspective view including partial peeling showing a dielectric filter according to the present invention;

도 4는 본 발명에 따른 유전체 필터의 특성을 나타내는 그래프.4 is a graph showing the 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 *

100 : 유전체 필터 110 : 유전체 몸체부100 dielectric filter 110 dielectric body portion

111,112 : 공진홀 120 : 도체피복111,112: resonance hole 120: conductor coating

131 : 입력단자 132 : 출력단자131: input terminal 132: output terminal

140 : 필터링 특성 개선부140: filtering characteristics improvement unit

상기 목적을 달성하기 위한 본 발명은, 상호 평행을 이루는 복수 개의 공진홀을 구비하며 전계에 의하여 전기분극을 유기시키는 장방체 형상의 유전체 몸체부와, 상기 유전체 몸체부의 표면에 도금된 도체피복과, 상기 도체피복의 부분 그라인딩(grinding) 가공을 통하여 구현된 입력단자 및 출력단자를 포함하여 이루어진 유전체 필터에 있어서, 상기 유전체 몸체부의 상면에 도금된 도체피복을 제거한 상태에서 상기 복수 개의 공진홀 사이의 상측 모서리에 피복된 도체피복의 일부분을 제거하고, 상기 출력단자를 구현하기 위하여 상기 도체피복을 부분 제거시킨 상기 유전체 몸체부의 모서리 정면으로부터 상기 도체피복이 제거된 유전체 몸체부의 상면에 이르기까지 상측방향으로 상기 도체피복을 제거하며, 상기 출력단자를 구현하기 위하여 상기 도체피복을 부분 제거시킨 상기 유전체 몸체부의 모서리 우측면으로부터 상기 유전체 몸체부의 하면에 이르기까지 하측방향으로 상기 도체피복을 제거하여 필터링 특성을 개선하는 필터링 특성 개선부를 포함하여 이루어지는 것을 그 기술적 구성상의 기본 특징으로 한다.The present invention for achieving the above object is a rectangular body portion having a plurality of resonant holes in parallel to each other and induces electrical polarization by an electric field, a conductor coating plated on the surface of the dielectric body portion, A dielectric filter comprising an input terminal and an output terminal implemented through a partial grinding process of a conductor coating, wherein the upper edges between the plurality of resonance holes are removed with the conductor coating plated on the upper surface of the dielectric body portion removed. The conductor in the upward direction from the edge face of the dielectric body portion from which the conductor coating was partially removed to remove the portion of the conductor coating coated on the upper surface of the dielectric body portion from which the conductor coating was removed. To remove the sheath and implement the output terminal And a filtering characteristic improving part which removes the conductor coating in a downward direction from the right side edge of the dielectric body portion which partially removes the body covering to the lower surface of the dielectric body portion, thereby improving filtering characteristics. do.

이하, 본 발명에 따른 유전체 필터의 바람직한 실시예를 도 3 내지 도 4를 참조하여 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the dielectric filter according to the present invention will be described with reference to FIGS. 3 to 4.

도 3은 본 발명에 따른 유전체 필터를 나타내는 부분 탈피를 포함한 사시도이고, 도 4는 본 발명에 따른 유전체 필터의 특성을 나타내는 그래프이다.Figure 3 is a perspective view including a partial stripping showing a dielectric filter according to the present invention, Figure 4 is a graph showing the characteristics of the dielectric filter according to the present invention.

본 발명에 따른 유전체 필터(100)는 도 3에 도시된 바와 같이, 상호 평행을 이루는 복수 개의 공진홀(111),(112)을 구비하며 전계에 의하여 전기분극을 유기시키는 장방체 형상의 유전체 몸체부(110)와, 상기 유전체 몸체부(110)의 표면에 도금된 도체피복(120)과, 상기 도체피복(120)의 부분 그라인딩(grinding) 가공을 통하여 구현된 입력단자(131) 및 출력단자(132)와, 신호의 통과대역 이외의 저역 또는 고역에서의 특성을 경사지게 하여 필터링 특성을 더욱 좋게 하는 필터링 특성 개선부(140)로 이루어진다.As shown in FIG. 3, the dielectric filter 100 according to the present invention includes a plurality of resonance holes 111 and 112 formed in parallel to each other, and has a rectangular body portion having a rectangular shape for inducing electrical polarization by an electric field. (110), the conductor coating 120 plated on the surface of the dielectric body portion 110, and the input terminal 131 and the output terminal (implemented through the partial grinding (grinding) processing of the conductor coating 120) 132 and a filtering characteristic improving unit 140 which inclines the characteristics in the low or high frequencies other than the pass band of the signal to further improve the filtering characteristics.

이때, 상기 필터링 특성 개선부(140)는 유전체 몸체부(110)의 상면에 도금된 도체피복(120)을 제거한 상태에서 상기 복수 개의 공진홀(111),(112) 사이의 상측 모서리에 피복된 도체피복(120)의 일부분을 제거하고, 상기 출력단자(132)를 구현하기 위하여 상기 도체피복(120)을 부분 제거시킨 상기 유전체 몸체부(110)의 모서리 정면으로부터 상기 도체피복(120)이 제거된 유전체 몸체부(110)의 상면에 이르기까지 상측방향으로 상기 도체피복(120)을 제거하며, 상기 출력단자(132)를 구현하기 위하여 상기 도체피복(120)을 부분 제거시킨 상기 유전체 몸체부(110)의 모서리 우측면으로부터 상기 유전체 몸체부(110)의 하면에 이르기까지 하측방향으로 상기 도체피복(120)을 제거한 형상으로 이루어진다.In this case, the filtering characteristic improving unit 140 is coated on the upper edges between the plurality of resonance holes 111 and 112 in a state where the conductive coating 120 plated on the upper surface of the dielectric body 110 is removed. The conductor coating 120 is removed from the front edge of the dielectric body portion 110 in which the conductor coating 120 is partially removed to remove the portion of the conductor coating 120 and to implement the output terminal 132. The dielectric body portion from which the conductor coating 120 is removed in an upward direction up to the upper surface of the dielectric body portion 110, and the conductor coating 120 is partially removed to implement the output terminal 132. The conductor coating 120 is removed in a downward direction from the right side edge of the edge 110 to the bottom surface of the dielectric body part 110.

이상에서와 같은 형상의 필터링 특성 개선부(140)를 구비한 유전체 필터(100)의 특성을 테스팅한 결과 도 4에 도시된 바와 같이 종래의 필터링 특성(a)에 비하여 저역 및 고역에서의 필터링 특성(A)이 매우 경사지게 구현되고, 더불어 고역에서의 트랜스미션 제로(transmission zero)를 구현할 수 있게 되어, 결국 저역 또는 고역에서의 혼입되기 쉬운 불필요한 잡음신호를 완전하게 제거할 수 있는 유용한 작용이 있음을 알 수 있다.As a result of testing the characteristics of the dielectric filter 100 having the filtering characteristic improving unit 140 having the shape as described above, as shown in FIG. 4, the filtering characteristics in the low and high ranges are higher than those of the conventional filtering characteristics (a). It can be seen that (A) is very slanted, and transmission zero at high frequencies can be implemented, which has a useful function of completely eliminating unnecessary noise signals that are likely to be mixed at low or high frequencies. Can be.

이상에서와 같이 본 발명에 따른 유전체 필터(100)에 의하면, 유전체 몸체부(110)의 상면에 도금된 도체피복(120)을 제거한 상태에서 복수 개의 공진홀(111),(112) 사이의 상측 모서리에 피복된 도체피복(120)의 일부분을 제거하며, 출력단자(132)를 구현하기 위하여 상기 도체피복(120)을 부분 제거시킨 상기 유전체 몸체부(110)의 모서리 정면으로부터 상기 도체피복(120)이 제거된 유전체 몸체부(110)의 상면에 이르기까지 상측방향으로 상기 도체피복(120)을 제거하고, 상기 출력단자(132)를 구현하기 위하여 상기 도체피복(120)을 부분 제거시킨 상기 유전체 몸체부(110)의 모서리 우측면으로부터 상기 유전체 몸체부(110)의 하면에 이르기까지 하측방향으로 상기 도체피복(120)을 제거한 형상으로 성형하여 신호의 통과대역 이외의 저역 또는 고역에서의 필터링 특성을 매우 경사지게 하여 필터링 특성을 더욱 좋게 하는 필터링 특성 개선부(140)를 구비시키므로써, 저역 또는 고역에서의 혼입되기 쉬운 불필요한 잡음신호를 완전히 제거할 수 있는 탁월한 효과가 있다.As described above, according to the dielectric filter 100 according to the present invention, the upper side between the plurality of resonance holes 111 and 112 in a state where the conductor coating 120 plated on the upper surface of the dielectric body 110 is removed. The conductor coating 120 is removed from a corner front surface of the dielectric body 110 in which the conductor coating 120 is partially removed to remove the portion of the conductor coating 120 coated at the corner and to implement the output terminal 132. The dielectric material having the conductor coating 120 removed in an upward direction up to the top surface of the dielectric body portion 110 from which the dielectric material is removed, and the conductor coating 120 partially removed to implement the output terminal 132. From the right side of the corner of the body portion 110 to the bottom surface of the dielectric body portion 110 to form a shape in which the conductor coating 120 is removed in the downward direction to filter characteristics in the low or high band other than the pass band of the signal every By providing the filtering characteristic improving unit 140 to incline the right to further improve the filtering characteristics, there is an excellent effect that can completely remove the unnecessary noise signal that is easy to be mixed in the low or high frequencies.

즉, 본 발명에 따른 유전체 필터(100)는 신호의 통과대역 이외의 저역 또는 고역에서의 필터링 특성을 더욱 경사지게 하여 필터링 특성을 매우 좋게 할 수 있는 필터링 특성 개선부(140)를 구비시킨 구조로 이루어져 저역 또는 고역에서의 혼입되기 쉬운 불필요한 잡음신호를 완전히 제거할 수 있는 탁월한 효과가 있다.That is, the dielectric filter 100 according to the present invention has a structure including a filtering characteristic improving unit 140 which can make the filtering characteristic very good by further inclining the filtering characteristic in the low or high region other than the pass band of the signal. It has an excellent effect of completely eliminating unnecessary noise signals that are susceptible to mixing at low or high frequencies.

Claims (1)

상호 평행을 이루는 복수 개의 공진홀(111),(112)을 구비하며 전계에 의하여 전기분극을 유기시키는 장방체 형상의 유전체 몸체부(110)와, 상기 유전체 몸체부(110)의 표면에 도금된 도체피복(120)과, 상기 도체피복(120)의 부분 그라인딩(grinding) 가공을 통하여 구현된 입력단자(131) 및 출력단자(132)를 포함하여 이루어진 유전체 필터(100)에 있어서,A rectangular body portion 110 having a plurality of resonance holes 111 and 112 parallel to each other and inducing electrical polarization by an electric field, and a conductor plated on the surface of the dielectric body portion 110. In the dielectric filter 100 including the sheath 120 and the input terminal 131 and the output terminal 132 implemented through a partial grinding process of the conductor coating 120, 상기 유전체 몸체부(110)의 상면에 도금된 도체피복(120)을 제거한 상태에서 상기 복수 개의 공진홀(111),(112) 사이의 상측 모서리에 피복된 도체피복(120)의 일부분을 제거하고, 상기 출력단자(132)를 구현하기 위하여 상기 도체피복(120)을 부분 제거시킨 상기 유전체 몸체부(110)의 모서리 정면으로부터 상기 도체피복(120)이 제거된 유전체 몸체부(110)의 상면에 이르기까지 상측방향으로 상기 도체피복(120)을 제거하며, 상기 출력단자(132)를 구현하기 위하여 상기 도체피복(120)을 부분 제거시킨 상기 유전체 몸체부(110)의 모서리 우측면으로부터 상기 유전체 몸체부(110)의 하면에 이르기까지 하측방향으로 상기 도체피복(120)을 제거하여 필터링 특성을 개선하는 필터링 특성 개선부(140)를 포함하여 이루어지는 것을 특징으로 하는 유전체 필터(100).In a state in which the conductor coating 120 plated on the upper surface of the dielectric body 110 is removed, a portion of the conductor coating 120 coated on the upper edges between the plurality of resonance holes 111 and 112 is removed. On the upper surface of the dielectric body portion 110 from which the conductor coating 120 is removed from the front edge of the dielectric body portion 110 from which the conductor coating 120 is partially removed to implement the output terminal 132. The dielectric body part is removed from the right side edge of the dielectric body part 110 in which the conductor sheath 120 is partially removed to implement the output terminal 132. Dielectric filter (100) characterized in that it comprises a filtering characteristic improving unit (140) for improving the filtering characteristics by removing the conductor coating (120) in the downward direction down to the bottom of (110).
KR1019990034639A 1999-08-20 1999-08-20 A dielectric filter KR20010018613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019990034639A KR20010018613A (en) 1999-08-20 1999-08-20 A dielectric filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019990034639A KR20010018613A (en) 1999-08-20 1999-08-20 A dielectric filter

Publications (1)

Publication Number Publication Date
KR20010018613A true KR20010018613A (en) 2001-03-05

Family

ID=19608057

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019990034639A KR20010018613A (en) 1999-08-20 1999-08-20 A dielectric filter

Country Status (1)

Country Link
KR (1) KR20010018613A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05259704A (en) * 1992-03-13 1993-10-08 Toko Inc Strip line filter
JPH07131204A (en) * 1993-10-28 1995-05-19 Murata Mfg Co Ltd Dielectric filter
JPH07263912A (en) * 1994-03-23 1995-10-13 Matsushita Electric Ind Co Ltd Dielectric resonator
JPH08274518A (en) * 1995-03-30 1996-10-18 Kyocera Corp Manufacture of dielectric resonating means
JPH1117416A (en) * 1997-06-26 1999-01-22 Matsushita Electric Ind Co Ltd Coaxial-type dielectric body resonator and its manufacture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05259704A (en) * 1992-03-13 1993-10-08 Toko Inc Strip line filter
JPH07131204A (en) * 1993-10-28 1995-05-19 Murata Mfg Co Ltd Dielectric filter
JPH07263912A (en) * 1994-03-23 1995-10-13 Matsushita Electric Ind Co Ltd Dielectric resonator
JPH08274518A (en) * 1995-03-30 1996-10-18 Kyocera Corp Manufacture of dielectric resonating means
JPH1117416A (en) * 1997-06-26 1999-01-22 Matsushita Electric Ind Co Ltd Coaxial-type dielectric body resonator and its manufacture

Similar Documents

Publication Publication Date Title
JPS6342501A (en) Microwave band-pass filter
US5721520A (en) Ceramic filter with ground plane features which provide transmission zero and coupling adjustment
US5539363A (en) Dielectric resonator apparatus having adjustable external structure and method of adjusting same
KR20010018613A (en) A dielectric filter
KR20010018614A (en) A dielectric filter
WO1997014191A1 (en) Half wave ceramic filter with open circuit at both ends
KR20010018615A (en) A dielectric filter
US6404306B1 (en) Dielectric ceramic filter with improved electrical characteristics in high side of filter passband
KR100286807B1 (en) Integral Dielectric Filter
KR100314087B1 (en) A ceramic filter
KR100283699B1 (en) Dielectric filter
KR100265299B1 (en) A dielectric filter
KR100314086B1 (en) A ceramic filter
KR100283705B1 (en) Bandpass filter
KR20000002562A (en) Dielectric filter
JPH08321702A (en) Dielectric filter and adjustment method for its frequency band with
JP2001211005A (en) Dielectric duplexer and its frequency adjusting method
KR100256089B1 (en) Integral dielectric filter
KR100195522B1 (en) Compact dielectric filter
KR20010018612A (en) A dielectric filter
KR100213374B1 (en) Small dielectric filter
KR20000021003A (en) Dielectric filter
KR20000039105A (en) Dielectric filter
KR20000039104A (en) Dielectric filter
KR20010018610A (en) A dielectric filter

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application