KR20010038963A - Magnetron - Google Patents

Magnetron Download PDF

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Publication number
KR20010038963A
KR20010038963A KR1019990047165A KR19990047165A KR20010038963A KR 20010038963 A KR20010038963 A KR 20010038963A KR 1019990047165 A KR1019990047165 A KR 1019990047165A KR 19990047165 A KR19990047165 A KR 19990047165A KR 20010038963 A KR20010038963 A KR 20010038963A
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KR
South Korea
Prior art keywords
magnetron
choke coil
coil
ferrite core
cathode terminal
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KR1019990047165A
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Korean (ko)
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KR100359802B1 (en
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박병욱
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구자홍
엘지전자 주식회사
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Priority to KR1019990047165A priority Critical patent/KR100359802B1/en
Publication of KR20010038963A publication Critical patent/KR20010038963A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/14Leading-in arrangements; Seals therefor
    • H01J23/15Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/04Cathodes
    • H01J23/05Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field

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  • Microwave Tubes (AREA)

Abstract

PURPOSE: A magnetron to reduce noise is provided to improve productivity by winding choke coil in a uniform interval at ferrite core when manufacturing, to have an advantage in view of temperature performance because of low temperature increasing when operating magnetron, to reduce manufacturing cost by not installing additional coil because performance of high frequency is excellent. CONSTITUTION: A choke coil(50), connected to ferrite core(40) and cathode terminal(10) wound in a uniform interval from one end part of ferrite core(40) to the other end part, is installed in magnetron having cathode terminal(10). Magnetron is composed of coil type cathode terminal(10), core insert type choke coil(50) composing filter circuit with through type condenser(20) as one end part is connected to cathode terminal(10), the other end part is connected to through electrode(30) of through type condenser(20), and ferrite core(40) that choke coil(50) is wound in a uniform interval.

Description

마그네트론{Magnetron}Magnetron

본 발명은 마그네트론에 관한 것으로, 특히 고주파에 대해 감쇄성능을 갖는 광대역 필터를 구성할 수 있도록 고안된 초크코일을 구비한 마그네트론에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetron, and more particularly, to a magnetron having a choke coil designed to constitute a broadband filter having attenuation performance against high frequencies.

일반적으로 마그네트론은 자전관이라고도 하는데, 극초단파(마이크로웨이브) 발진용 전자관의 일종으로, 강력한 자극사이에 넣으면 그 자계와 양극/음극간의 전계에 의해서 음극에서 나온 전자는 회전운동을 하게 되면서 대출력의 극초단파가 발진된다. 그러므로, 레이다를 비롯하여 가전용 전자레인지에 이르기까지 각종 극초단파기기에 이용되는 실정이다.In general, magnetron is also called magnetron. It is a kind of microwave (microwave) oscillating electron tube. When it is inserted between the strong magnetic poles, the electron from the cathode is rotated by the electric field between the magnetic field and the anode / cathode. Rash. Therefore, the situation is used in a variety of microwave devices ranging from radar to microwave ovens.

또한, 초크코일은 코일이 교류에 대해 큰 저항분을 갖는 성질을 이용하여 교류분이나 고주파분의 저지를 위해 사용되는 것으로, 콘덴서와의 조합으로 회로와 필터가 구성된다.In addition, the choke coil is used for the prevention of alternating current and high frequency components by utilizing the property that the coil has a large resistance against alternating current, and a circuit and a filter are configured by combining with a capacitor.

이하, 첨부된 도면을 참조하여 종래 기술에 따른 마그네트론을 설명하면 다음과 같다.Hereinafter, a magnetron according to the prior art will be described with reference to the accompanying drawings.

도 1은 종래 기술에 따른 마그네트론을 나타낸 도면이고, 도 2는 주파수에 대한 감쇄비 특성을 나타낸 그래프이다.1 is a view showing a magnetron according to the prior art, Figure 2 is a graph showing the attenuation ratio characteristics with respect to frequency.

도 1에 도시된 바와 같이, 종래 기술에 따른 마그네트론은 음극단자(1)와, 상기 음극단자(1)에 일단이 연결되고 타측 일단이 관통형 콘덴서(2)의 관통전극(3)에 접속되어 상기 관통형 콘덴서(2)와 함께 필터회로를 구성하는 코어 삽입형 초크코일(5)과, 페라이트 코아(4)로 구성된다. 또한, 상기 음극단자(1)와 코어 삽입형 초크코일(5)과의 사이에 공심형 초크코일(6)이 연결된다.As shown in FIG. 1, the magnetron according to the related art has one end connected to the negative electrode terminal 1 and the negative electrode terminal 1, and the other end connected to the through electrode 3 of the through-type capacitor 2. A core insertion choke coil 5 and a ferrite core 4 which together with the through-type condenser 2 constitute a filter circuit. In addition, an air core choke coil 6 is connected between the negative electrode terminal 1 and the core insert type choke coil 5.

이와 같이 구성된 마그네트론은 상기 음극단자(1)쪽으로 누설한 불필요 복사의 장치 바깥 누출이 상기 초크코일(5)과 관통형 콘덴서(2)에 의해 구성되는 LC 필터회로에 의해서 저지된다.The magnetron constructed in this way is prevented by the LC filter circuit constituted by the choke coil 5 and the through-type condenser 2 from leaking out of the device of unnecessary radiation leaking toward the cathode terminal 1.

상기 페라이트 코아(4)는 인덕터로서의 기능뿐만 아니라 고주파 흡수기능을 아울러 구비하므로, 30∼300MHZ의 불필요 복사의 장치밖 누출을 효율좋게 방지할 수 있다.Since the ferrite core 4 is provided with not only a function as an inductor but also a high frequency absorption function, leakage of outside the device of unnecessary radiation of 30 to 300 MHZ can be efficiently prevented.

상기 음극단자(1)와 코어 삽입형 초크코일(5)과의 사이에 설치된 공심형 초크코일(6)은 상기 음극단자(1)쪽에서 나타난 기본파 성분을 포함한 불필요 복사를 감쇄시킨다. 또한 주파수에 따른 감쇄비 특성을 도 2를 참조하여 설명하면, 주파수 0MHz에서 200MHz까지 감쇄비가 급격하게 상승하며, 주파수 300MHz 이상이 되면 감쇄비 특성이 하강됨을 알 수 있다.An air core choke coil 6 provided between the negative electrode terminal 1 and the core insertion choke coil 5 attenuates the unnecessary radiation including the fundamental wave component shown from the negative electrode terminal 1 side. In addition, when the attenuation ratio characteristic according to frequency is described with reference to FIG. 2, it can be seen that the attenuation ratio rapidly increases from frequency 0 MHz to 200 MHz, and when the frequency is 300 MHz or more, the attenuation ratio characteristic decreases.

상술한 바와 같이, 주파수가 높아질수록 초크코일에서 공심형 초크코일을 지나면 코일과 코일사이의 권선에서의 콘덴서 성분이 커지게 되어 코일보다는 콘덴서로서의 역할이 커지게 된다.As described above, as the frequency increases, the condenser component in the winding between the coil and the coil becomes larger when the choke coil passes through the concentric choke coil, so that the role of the capacitor becomes larger than the coil.

따라서, 콘덴서 성분이 전체 특성을 지배할 경우에는 고역통과필터의 특성으로 변하게 되어 300MHz 이상에 대해서는 감쇄 성능이 저하하여 이 대역의 방사성 고주파 잡음을 효과적으로 차단할 수 없다.Therefore, when the condenser component dominates the overall characteristics, it is changed into the characteristics of the high pass filter, and the attenuation performance is deteriorated at 300 MHz or more, so that the radio frequency high frequency noise of this band cannot be effectively blocked.

이상에서 설명한 바와 같이 종래 기술에 따른 마그네트론은 다음과 같은 문제점이 있었다.As described above, the magnetron according to the prior art has the following problems.

첫째, 주파수가 높아질수록 코일과 코일사이의 권선에서의 콘덴서 성분이 커져서 코일보다는 콘덴서로서의 역할이 커지게 되어 고주파 잡음을 차단할 수 없다.First, as the frequency increases, the condenser component in the winding between the coil and the coil becomes larger, so that the role of the capacitor becomes larger than that of the coil, and thus high frequency noise cannot be blocked.

둘째, 상기 고주파 잡음을 차단하기 위해 초크 코일을 채용하여 2단 필터를 구성하여야 하므로 제조단가가 높아진다.Second, since the two-stage filter must be configured by using the choke coil to block the high frequency noise, the manufacturing cost increases.

본 발명은 이러한 문제점을 해결하기 위해 안출한 것으로, 마그네트론의 발진 동작시 발생되는 광범위한 잡음을 감쇄시킬 수 있도록 한 마그네트을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems, and an object thereof is to provide a magnet capable of attenuating a wide range of noise generated during the oscillation operation of the magnetron.

도 1은 종래 기술에 따른 마그네트론을 나타낸 도면1 is a view showing a magnetron according to the prior art

도 2는 주파수에 따른 감쇄비 특성을 나타낸 도면2 is a view showing the attenuation ratio characteristics according to the frequency

도 3은 본 발명에 따른 마그네트론을 나타낸 도면3 is a view showing a magnetron according to the present invention;

도 4는 주파수에 따른 감쇄비 특성을 나타낸 도면4 is a graph illustrating attenuation ratio characteristics according to frequency;

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

10 : 음극단자 20 : 관통형 콘덴서10: cathode terminal 20: through capacitor

30 : 관통형 전극 40 : 페라이트 코아30 through-hole electrode 40 ferrite core

50 : 초크코일50: Choke Coil

이와 같은 목적을 달성하기 위한 본 발명에 따른 마그네트론은 음극단자를 구비한 마그네트론에서, 페라이트 코아와, 상기 음극단자에 연결되어 상기 페라이트 코아의 일단부터 타단까지 일정간격으로 권선되는 초크코일을 포함하여 구성되는데 그 특징이 있다.The magnetron according to the present invention for achieving the above object comprises a ferrite core and a choke coil which is connected to the cathode terminal and the choke coil wound at a predetermined interval from the other end of the ferrite core to the cathode terminal. There is a characteristic.

이하, 첨부된 도면을 참조하여 본 발명에 따른 마그네트론을 보다 더 상세히 설명하면 다음과 같다.Hereinafter, the magnetron according to the present invention will be described in more detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 마그네트론을 나타낸 도면이고, 도 4는 주파수에 대한 감쇄비 특성을 나타낸 도면이다.3 is a diagram illustrating a magnetron according to the present invention, and FIG. 4 is a diagram illustrating attenuation ratio characteristics with respect to frequency.

도 3에 도시된 바와 같이, 본 발명에 따른 마그네트론은 코일형상의 음극단자(10)와, 상기 음극단자(10)에 일단이 연결되고 타측 일단이 관통형 콘덴서(20)의 관통전극(30)에 접속되어 상기 관통형 콘덴서(20)와 함께 필터회로를 구성하는 코어 삽입형 초크코일(50)과, 상기 초크코일(50)이 일정간격으로 권선되는 페라이트 코아(40)로 구성된다.As shown in FIG. 3, the magnetron according to the present invention has a coil-shaped cathode terminal 10, one end of which is connected to the cathode terminal 10, and the other end of which is a through electrode 30 of the through-type capacitor 20. A core insertion choke coil 50 is connected to the through-type condenser 20 to form a filter circuit, and the ferrite core 40 is wound around the choke coil 50 at a predetermined interval.

상기 초크코일(50)은 상기 음극단자(10)에 일단이 연결되고 상기 페라이트 코아(40)의 일단에서 타단까지 일정간격으로 권선된다.One end of the choke coil 50 is connected to the negative electrode terminal 10, and the choke coil 50 is wound from one end to the other end of the ferrite core 40 at a predetermined interval.

여기서, 상기 초크코일(50)은 코일 권선간의 콘덴서 성분이 거리에 반비례 하므로, 일정간격으로 권선된 초크코일은 주파수 증가에 따른 콘덴서 성분증가를 억제시킬 수 있다.Here, the choke coil 50 is because the condenser component between the coil windings is inversely proportional to the distance, the choke coil wound at a predetermined interval can suppress the increase in the condenser component with increasing frequency.

이때, 상기 일정간격으로 권선되는 초크코일(50)의 간격은 최대 5mm 이하의 소정값으로 결정하여 권선함으로써, 상기 페라이트 코아(40) 전체에 초크코일(50)이 권선되고 이에 따라 종래 이상의 코일값을 갖도록 설정할 수 있다.At this time, the interval of the choke coil 50 is wound at a predetermined interval is determined by winding a predetermined value up to 5mm or less, the choke coil 50 is wound around the entire ferrite core 40, accordingly the coil value of the conventional Can be set to have.

상술한 바와 같이 구성된 마그네트론은 도 4에 도시된 바와 같이, 주파수가 0에서 200MHz정도 까지는 감쇄비(dB)가 급격히 증가하나, 200MHz 이상의 주파수에서는 일정한 감쇄비(dB)를 유지시키며 고주파수가 되더라도 감쇄비의 감소폭은 크지 않음을 알 수 있다.As shown in FIG. 4, the magnetron configured as described above rapidly increases the attenuation ratio (dB) from 0 to about 200 MHz, but maintains a constant attenuation ratio (dB) at frequencies above 200 MHz, even when the frequency is high. It can be seen that the decrease of is not large.

따라서, 종래와 같은 저역통과 특성을 만족시키면서도 300MHz 이상의 고주파 감쇄 특성을 유지할 수 있으므로 광대역 필터를 구성할 수 있다.Therefore, a high frequency attenuation characteristic of 300 MHz or more can be maintained while satisfying the low pass characteristic as in the prior art, so that a wideband filter can be configured.

이상에서 설명한 바와 같이 본 발명에 따른 마그네트론은 다음과 같은 효과가 있다.As described above, the magnetron according to the present invention has the following effects.

첫째, 페라이트 코아에 일정간격으로 초크코일을 권선하는 것으로 제작이 가능하므로 생산성이 높다.First, it is possible to manufacture by winding the choke coil at a fixed interval in the ferrite core, so the productivity is high.

둘째, 마그네트론 동작시 온도상승이 적으므로 온도성능의 측면에 장점이 있다.Second, the temperature rise is small during the operation of the magnetron has an advantage in terms of temperature performance.

셋째, 고주파 성능이 우수하여 별도의 코일을 설치하지 않아도 가능하므로 제조단가를 낮출 수 있다.Third, because the high frequency performance is excellent, it is possible to lower the manufacturing cost because it is possible to install a separate coil.

Claims (2)

음극단자를 구비한 마그네트론에서,In the magnetron having a negative terminal, 페라이트 코아와,Ferrite core, 상기 음극단자에 연결되어 상기 페라이트 코아의 일단부터 타단까지 일정간격으로 권선되는 초크코일을 포함하여 구성됨을 특징으로 하는 마그네트론.And a choke coil connected to the cathode terminal and wound at a predetermined interval from one end to the other end of the ferrite core. 제 1 항에 있어서,The method of claim 1, 상기 일정간격은 5mm 이하인 것을 특징으로 하는 마그네트론.The predetermined distance is a magnetron, characterized in that less than 5mm.
KR1019990047165A 1999-10-28 1999-10-28 Magnetron KR100359802B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111739773A (en) * 2020-06-24 2020-10-02 电子科技大学 Miniaturized magnetron structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890000829Y1 (en) * 1985-12-31 1989-03-25 삼성전자 주식회사 A magnetron
JPH0289756U (en) * 1988-12-27 1990-07-17
JPH05217512A (en) * 1992-02-04 1993-08-27 Matsushita Electron Corp Magnetron device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111739773A (en) * 2020-06-24 2020-10-02 电子科技大学 Miniaturized magnetron structure
CN111739773B (en) * 2020-06-24 2021-12-03 电子科技大学 Miniaturized magnetron structure

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