KR100258037B1 - Star type microwave super narrow band bpf using dielectric resonators mounted on angled coaxial cable - Google Patents
Star type microwave super narrow band bpf using dielectric resonators mounted on angled coaxial cable Download PDFInfo
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- KR100258037B1 KR100258037B1 KR1019980000001A KR19980000001A KR100258037B1 KR 100258037 B1 KR100258037 B1 KR 100258037B1 KR 1019980000001 A KR1019980000001 A KR 1019980000001A KR 19980000001 A KR19980000001 A KR 19980000001A KR 100258037 B1 KR100258037 B1 KR 100258037B1
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- coaxial line
- square
- dielectric
- narrow band
- star type
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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
- H01P1/202—Coaxial filters
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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
- H01P1/203—Strip line filters
- H01P1/20309—Strip line filters with dielectric resonator
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
발명은 각형동축선에 TEM모드의 유전체공진기를 장착하여 500 MHz 이상의 주파수 대역에서 통신 및 전기적인 에너지 전송회로에 응용될 수 있는 대역통과필터에 관한 것이다.The present invention relates to a bandpass filter that can be applied to a communication and electrical energy transmission circuit in a frequency band of 500 MHz or more by installing a dielectric resonance resonator in a TEM mode on a square coaxial line.
현재, 개인 휴대용 전화기, 무선호출기, WLL 등의 고부가가치 무선서비스를 목적으로 하는 마이크로파시스템의 이용증대가 급격히 진행되고 있다. 따라서 대부분의 통신기기에 필수적으로 소요되는 핵심부품인 대역통과필터의 기하급수적인 수요증가가 예상된다.At present, there is a rapid increase in the use of microwave systems for high value-added wireless services such as personal mobile phones, pagers, and WLLs. Therefore, the exponential demand for bandpass filters, a key component required for most communication devices, is expected to increase.
주파수 500 MHz이상 그리고 약 5 GHz이하를 이용하는 상기와 같은 응용분야에 소요되는 대역통과필터제작에 저주파에서 사용되는 집중정수소자(Lumped Circuit Element)를 이용할수 없고, 도파관과 평면회로와 같은 분포정수소자(Distributed Circuit Element)를 이용하여야 하는데, 이런 경우 부품의 크기가 커질 뿐만 아니라 통과대역에서의 삽입손실이 커지며 저지대역에서의 감쇄특성이 떨어지고 협대역의 투과특성을 얻기위한 어려움 등의 문제점이 있다.It is not possible to use the Lumped Circuit Element, which is used at low frequency, for the bandpass filter used in the above applications that use the frequency above 500 MHz and below about 5 GHz. (Distributed Circuit Element) should be used. In this case, there are problems such as not only the size of the component but also the insertion loss in the pass band, the attenuation in the stop band is low, and the difficulty in obtaining the transmission characteristics of the narrow band.
이러한 문제를 해결하기 위하여 보통 유전체공진기를 사용하여 대역통과필터를 제작하는데 본 발명자가 출원했던 구조의 기존 대역통과필터(출원번호 : 1995 년 특허 출원 제 53021호)는 유전체공진기를 장착시 마이크로스트립 중심도선과의 전기적인 분리가 필요하여 유전체 필름 등이 사용되어야 하는 제작상 번거로움이 있고 또다른 대역통과필터(출원번호 : 1996 년 특허출원 제 53022호)의 경우는 진행방향에 수직인 평면에 최대 두 개이상의 공진기를 부착시킬 수 없는 단점으로 인해 원하는 협대역의 특성을 얻지 못한다. 본 발명은 기존의 경우보다 한정된 공간에 다수개의 유전체공진기를 부착시킬 수 있는 구조적 장점이 있으며 특성면에서 기존에 출원된 두구조에서의 각각의 장점인 저손실과 협대역의 특성을 얻을 수 있다.In order to solve this problem, a band pass filter is usually manufactured by using a dielectric resonator. An existing band pass filter (application number: 1995 patent application No. 53021) of the structure applied by the present inventors has a microstrip center when a dielectric resonator is mounted. It is cumbersome in manufacturing that dielectric film should be used because electrical separation from conductor is required. In case of another band pass filter (Application No. 53022, 1996), it is maximum in the plane perpendicular to the direction of travel. The disadvantage of not being able to attach more than two resonators does not achieve the desired narrowband characteristics. The present invention has a structural advantage of attaching a plurality of dielectric resonators in a limited space than in the conventional case, and in terms of characteristics, it is possible to obtain characteristics of low loss and narrow band, which are advantages of the two previously filed structures.
이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 회로의 부피를 소형화하고 통과대역에서 보다 협대역의 특성과 삽입손실특성을 향상시킨 새로운 구조의 초협대역 통과필터 제작을 그 목적으로 한다.Accordingly, an object of the present invention is to manufacture a ultra narrow band pass filter having a new structure in which the volume of the circuit is miniaturized and the narrow band characteristics and insertion loss characteristics are improved in the pass band to solve the above problems.
상기와 같은 목적을 달성하기 위하여 본 발명은, 각형동축선과, λ/4 TEM(Transverse Electromagnetic)모드의 정방형 유전체공진기와, 가는 도선(Inductive Post)등의 분포정수회로만을 이용한 것을 특징으로 한다.In order to achieve the above object, the present invention is characterized by using only a square coaxial line, a square dielectric resonator of λ / 4 TEM (Transverse Electromagnetic) mode, and a distribution constant circuit such as a thin conductive line.
제1도는 본 발명에 따른 8개의 TEM모드 유전체공진기를 인덕티브 포스트를 이용하여 각형동축선(팔각동축선의 경우)의 외부도체에 장착한 대역통과필터를 나타낸 도면.1 is a diagram showing a bandpass filter in which eight TEM mode dielectric resonators according to the present invention are mounted on an outer conductor of a square coaxial line (in the case of an octagonal coaxial line) using an inductive post.
제2도는 제1도에 도시된 대역통과필터의 정면도를 나타낸 도면.FIG. 2 is a front view of the bandpass filter shown in FIG.
제3도는 제1도에 도시된 대역통과필터의 측면도를 나타낸 도면.3 is a side view of the bandpass filter shown in FIG.
제4도는 제1도에 도시된 대역통과필터의 평면도를 나타낸 도면.4 is a plan view of the bandpass filter shown in FIG.
제5도는 제1도에 도시된 대역통과필터에 사용되는 유전체공진기를 나타낸 도면.FIG. 5 shows a dielectric resonator used in the bandpass filter shown in FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 각형동축선의 중심도선 50 : 가는 유도성 도선(Inductive Post)10: center line of square coaxial line 50: thin inductive post
20 : 각형동축선의 외부도체 60 : 유전체 공진기의 바깥도체(은도금)20: outer conductor of square coaxial line 60: outer conductor of dielectric resonator (silver plating)
30 : 각형동축선의 유전체 70 : 유전체 공진기의 유전체30 dielectric of square coaxial line 70 dielectric of dielectric resonator
40 : TEM모드의 정방형 유전체 공진기40: square dielectric resonator in TEM mode
80 : 유전체공진기를 연결하기 위해 각형동축선의 외부도체의 금속을 벗긴부분80: A metal stripped part of the outer conductor of a square coaxial line for connecting a dielectric resonator
이하, 본 발명의 구성을 첨부된 도면을 참조하여 설명한다.Hereinafter, the configuration of the present invention will be described with reference to the accompanying drawings.
제1도는 본 발명에 따른 각형동축선(팔각동축선)과 여덟 개의 TEM모드 유전체공진기를 이용한 구성을 2단 이용한 대역통과필터의 입체적인 도면이다. 원하는 대역에 따라 공진기의 수를 조절할 수 있다. 이러한 구조를 λ/4의 간격으로 여러단 구성하면 초협대역의 특성을 얻을 수 있다. 제2도, 제3도에서 각형동축선의 외부도체(20)에 제5도에서 보여주는 정방형 유전체공진기 밑면 크기와 같게 벗겨내고(80), 정방형 유전체공진기의 바깥도체(60)를 각형동축선의 외부도체(20)와 전기적으로 연결한다. 이와함께 각형동축선의 중심도체(10)와 전기적으로 연결된 가는 도선(50)을 마이크로스트립라인의 유전체(30)를 통하여 아래로 내려 정방형 유전체공진기의 바깥도체(60)에 전기적으로 연결한다. 상기의 전기적인 연결은 필드가 새지 않도록 틈이 없이 연결한다. 이러한 단위블럭을 각형동축선의 각면에 장착하여 진행방향에 수직인 평면에 다수개의 유전체공진기를 위치시킬 수도 있으며, 더 나아가 신호의 진행방향을 따라 다단의 블록을 형성시켜 한정된 공간에서 종전의 경우에 비하여 많은 공진기를 장착할 수 있다.1 is a three-dimensional view of a bandpass filter using two stages using a square coaxial line (octagonal coaxial line) and eight TEM mode dielectric resonators according to the present invention. The number of resonators can be adjusted according to the desired band. By constructing such a structure in multiple stages at intervals of [lambda] / 4, the characteristics of the ultra narrow band can be obtained. 2 and 3, the outer conductor 20 of the square coaxial line is stripped to the bottom of the square dielectric resonator as shown in FIG. Electrically connect with (20). Along with this, the thin wire 50 electrically connected to the center conductor 10 of the square coaxial line is lowered down through the dielectric 30 of the microstrip line and electrically connected to the outer conductor 60 of the square dielectric resonator. The electrical connection is made without a gap so that the field does not leak. The unit blocks may be mounted on each side of the square coaxial line to place a plurality of dielectric resonators in a plane perpendicular to the traveling direction. Furthermore, by forming a plurality of blocks along the traveling direction of the signal, a plurality of blocks may be formed in a limited space, compared to the conventional case. Many resonators can be mounted.
상기와 같은 대역통과필터에 사용되는 제5도의 유전체공진기는 고유전율, 저 손실을 갖는 세라믹 유전체(70)를 사용하여 크기가 작고 손실이 적으며 우수한 감쇄특성을 가진다.The dielectric resonator of FIG. 5 used in the bandpass filter as described above uses a ceramic dielectric material 70 having high dielectric constant and low loss, and has a small size, low loss, and excellent attenuation characteristics.
상기와 같이 본 발명은, 각형동축선과, λ/4 TEM(Transverse Electromagnetic)모드의 정방형 유전체공진기와, 가는 도선(Inductive Post)의 분포정수회로만을 이용하여 크기가 작고 통과대역의 삽입손실이 적으며 초협대역통과필터 특성을 얻을 수 있다.As described above, the present invention uses a square coaxial line, a square dielectric resonator of λ / 4 TEM (Transverse Electromagnetic) mode, and a distribution constant circuit of a thin conductive line (Inductive Post). Ultra narrow bandpass filter characteristics can be obtained.
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KR1019980000001A KR100258037B1 (en) | 1998-01-03 | 1998-01-03 | Star type microwave super narrow band bpf using dielectric resonators mounted on angled coaxial cable |
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KR1019980000001A KR100258037B1 (en) | 1998-01-03 | 1998-01-03 | Star type microwave super narrow band bpf using dielectric resonators mounted on angled coaxial cable |
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Cited By (1)
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RU2713073C1 (en) * | 2019-02-12 | 2020-02-03 | Акционерное общество "Научно-производственное предприятие "Исток" имени А.И. Шокина" (АО "НПП "Исток" им. Шокина") | Device for alignment of amplitude-frequency characteristic of microwave path |
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1998
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2713073C1 (en) * | 2019-02-12 | 2020-02-03 | Акционерное общество "Научно-производственное предприятие "Исток" имени А.И. Шокина" (АО "НПП "Исток" им. Шокина") | Device for alignment of amplitude-frequency characteristic of microwave path |
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