JP2594316B2 - Magnetron - Google Patents
MagnetronInfo
- Publication number
- JP2594316B2 JP2594316B2 JP10456388A JP10456388A JP2594316B2 JP 2594316 B2 JP2594316 B2 JP 2594316B2 JP 10456388 A JP10456388 A JP 10456388A JP 10456388 A JP10456388 A JP 10456388A JP 2594316 B2 JP2594316 B2 JP 2594316B2
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- metal
- magnetron
- microwave
- plate portion
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Microwave Tubes (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、電子レンジ等のマイクロ波加熱機器に用い
られるマグネトロンに関するものである。Description: TECHNICAL FIELD The present invention relates to a magnetron used for a microwave heating device such as a microwave oven.
従来の技術 一般に、電子レンジ等に用いられるマグネトロンは第
6図に示すように構成されており、円筒状の陽極筒体1
は、陰極2側へ突出して共振空洞を形成する多数の陽極
ベイン3を内周面に有し、陽極筒体1の両開口端部には
磁界集束用の漏斗状の第1および第2の磁極片4,5が、
相対向するように配設されている。そして、金属製の排
気管6にセラミックからなる絶縁管7を介して封着され
た鳩目状金属管8のフランジ部8aが、第1の磁極片4を
覆う関係に陽極筒体1の開口端部に封着されており、陽
極ベイン3から延び出たマイクロ波導出用導体9が排気
管6に接続されている。なお、排気管6には金属製帽状
のマイクロ波出力端子10が嵌着されており、第2の磁極
片5をフランジで覆う関係に陽極筒体1の他方の開口端
部に封着されたいま一つの鳩目状金属管11に、図示を省
略したが陰極端子導出用のステムが封着されてなる。2. Description of the Related Art Generally, a magnetron used in a microwave oven or the like is configured as shown in FIG.
Has a plurality of anode vanes 3 protruding toward the cathode 2 side to form a resonance cavity on the inner peripheral surface, and a funnel-shaped first and second funnel-shaped for magnetic field focusing are provided at both open ends of the anode cylinder 1. The pole pieces 4, 5
They are arranged to face each other. The flange 8a of the eyelet-shaped metal pipe 8 sealed to the metal exhaust pipe 6 via the insulating pipe 7 made of ceramic covers the first pole piece 4 so that the opening end of the anode cylinder 1 is opened. A microwave guiding conductor 9 extending from the anode vane 3 and being connected to the exhaust pipe 6 is sealed in the portion. A metal cap-shaped microwave output terminal 10 is fitted to the exhaust pipe 6 and is sealed to the other open end of the anode cylinder 1 so as to cover the second pole piece 5 with a flange. Although not shown, a stem for leading a cathode terminal is sealed to another eyelet-shaped metal tube 11.
かかるマグネトロンは、通常、2450MHzを基本波とす
るマイクロ波発振動作をなし、その出力はマイクロ波出
力端子10からとり出される。マイクロ波出力中には基本
波成分と、その整数倍の周波数を有する高調波成分とが
含まれる。そして、とくに高次の高調波成分をシールド
するのは容易でなく、かかる高調波成分がもしも装置外
へ漏洩すると、通信妨害等の好ましくない結果をもたら
す。そこで、特公昭56−21215号公報等に開示されてい
るように、高調波成分阻止用のチョーク部材をマイクロ
波導出用導体に付設することが行なわれている。Such a magnetron normally performs a microwave oscillation operation with a fundamental wave of 2450 MHz, and its output is taken out from a microwave output terminal 10. The microwave output includes a fundamental component and a harmonic component having a frequency that is an integral multiple of the fundamental component. In particular, it is not easy to shield high-order harmonic components, and if such harmonic components leak out of the device, undesired results such as communication interference are brought about. Therefore, as disclosed in Japanese Patent Publication No. 56-21215 and the like, a choke member for blocking a harmonic component is attached to a microwave leading conductor.
発明が解決しようとする課題 しかし、筒状のチョーク部材を管内に封入しようとす
ると、かなりのスペースを管内に確保せねばならず、マ
グネトロンの短小化が困難となる。Problems to be Solved by the Invention However, when attempting to enclose a tubular choke member in a pipe, a considerable space must be secured in the pipe, and it is difficult to reduce the size of the magnetron.
課題を解決するための手段 本発明は、かかる従来の課題を解決すべくなされたも
ので、陽極筒体の一方の開口端部に金属管および絶縁管
を介して金属製の排気管を封着し、前記陽極筒体の内周
面から陰極側へ突出した陽極ベインより延び出たマイク
ロ波導出用導体を前記排気管に接続せしめてなるマグネ
トロンにおいて、前記金属管に前記マイクロ波導出用導
体を包囲する円環状の金属板部分を有せしめ、この金属
板部分に発振マイクロ波の任意次高調波成分の約4分の
1波長に相当する電気長のスロットを有せしめる。Means for Solving the Problems The present invention has been made to solve such a conventional problem, and has a metal exhaust pipe sealed to one open end of an anode cylinder via a metal pipe and an insulating pipe. Then, in a magnetron in which a microwave guiding conductor extending from an anode vane protruding from the inner peripheral surface of the anode cylinder to the cathode side is connected to the exhaust pipe, the metal guiding tube includes the microwave guiding conductor. An encircling annular metal plate portion is provided, and the metal plate portion has a slot having an electrical length corresponding to about a quarter wavelength of an arbitrary harmonic component of the oscillating microwave.
作 用 このように構成すると、前記金属板部分によってマイ
クロストリップ線路型のチョークが構成されるので、す
なわち、前記マイクロ波導出用導体を伝ぱん路として管
外にふく射される高調波成分が、前記金属板部分のスロ
ットで共振して減衰または反射するので、当該高調波成
分の管外へのふく射量を軽減させることができる。Operation With this configuration, a microstrip line type choke is formed by the metal plate portion, that is, a harmonic component radiated out of the tube using the microwave deriving conductor as a transmission path is reduced by the above-described method. Since the resonance is attenuated or reflected at the slot of the metal plate portion, the amount of the harmonic component radiated outside the tube can be reduced.
実施例 つぎに、本発明を図面に示した実施例とともに詳しく
説明する。Next, the present invention will be described in detail with reference to embodiments shown in the drawings.
第1図に示す構成が第6図に示した従来の構成と異な
るところは、マイクロ波導出用導体9を包囲する円環状
の金属板12が鳩目状金属管8のネック部に付設されてい
る点であり、その他の構成には変わりがない。ただし、
金属板12は第2図に示すように4個のスロット13a,13b,
13c,13dを有しており、たとえば、スロット13aは第2高
調波成分の約4分の1波長に相当する電気長Laを、スロ
ット13bは第3高調波成分の約4分の1波長に相当する
電気長Lbをという具合に、それぞれが異なる高調波の約
4分の1波長に相当する電気長を有している。これらの
電気長は、金属板12の中央孔13によっても若干の影響を
受けるが、かかる構成となすによって、複数種のマイク
ロストリップ路線型チョークを具備したものとなる。The configuration shown in FIG. 1 is different from the conventional configuration shown in FIG. 6 in that an annular metal plate 12 surrounding the microwave guiding conductor 9 is attached to the neck of the eyelet-shaped metal tube 8. This is a point, and other configurations remain unchanged. However,
The metal plate 12 has four slots 13a, 13b, as shown in FIG.
For example, the slot 13a has an electrical length La corresponding to about a quarter wavelength of the second harmonic component, and the slot 13b has an electrical length La corresponding to about a quarter wavelength of the third harmonic component. Each has an electrical length corresponding to about a quarter wavelength of a different harmonic, such as the corresponding electrical length Lb. These electrical lengths are slightly affected by the central hole 13 of the metal plate 12, but with such a configuration, a plurality of types of microstrip line-type chokes are provided.
金属板12は単体のものでなくてもよい。第3図に示す
実施例のものでは、鳩目状金属管14の径小端面自体に円
環状の金属板部分14aを有せしめ、第4図に示すように
金属板部分14aに中央孔15および適数個のスロット15a,1
5bを設けている。The metal plate 12 need not be a single piece. In the embodiment shown in FIG. 3, an annular metal plate portion 14a is provided on the small-diameter end surface of the eyelet-shaped metal tube 14 itself, and as shown in FIG. Several slots 15a, 1
5b is provided.
第5図に示す実施例では、金属板部分14の中央孔周縁
に筒状部14bを有せしめ、この筒状部14bを、任意高調波
の約4分の1波長の電気長となし、当該高調波のふく射
を阻止するチョークならしめている。In the embodiment shown in FIG. 5, a cylindrical portion 14b is provided at the periphery of the center hole of the metal plate portion 14, and the cylindrical portion 14b has an electrical length of about one quarter wavelength of an arbitrary harmonic. It is a choke that blocks the radiation of harmonics.
このように構成されたマグネトロンにおいては、金属
板12または金属板部分14aによって1種または複数種の
高調波成分をそれぞれ約40dB減衰させることができるの
であり、かかる金属板または金属板部分を複数段に配設
することによっては、さらに多くの高調波成分を減衰さ
せることができる。各スロットの電気長を揃えてももち
ろん構わない。In the magnetron configured as described above, one or more harmonic components can be attenuated by about 40 dB by the metal plate 12 or the metal plate portion 14a. , More harmonic components can be attenuated. Of course, the electrical length of each slot may be the same.
発明の効果 本発明は前述のように、出力側の在来の金属管内に環
状の金属板部分を有せしめるだけで、複数種のしかも偏
平なチョーク作用部が備わり、しかも、マグネトロンの
製造コストの低減および軸方向長の短縮も可能となる。Advantageous Effects of the Invention As described above, the present invention is provided with a plurality of types of flat choke action portions only by having an annular metal plate portion in a conventional metal tube on the output side, and furthermore, reduces the manufacturing cost of the magnetron. It is also possible to reduce the length and the axial length.
第1図は本発明を実施したマグネトロンの一部破断側面
図、第2図は同マグネトロンの金属板の斜視図、第3図
は本発明の他の実施例の要部の側断面図、第4図は同実
施例の金属板部分の一部破断斜視図、第5図は本発明の
いま一つの実施例の金属板部分の一部破断斜視図、第6
図は従来のマグネトロンの一部破断側面図である。 1……陽極筒体、2……陰極、3……陽極ベイン、4,5
……磁極片、6……排気管、7……絶縁管、8……金属
管、9……マイクロ波導出用導体、12……金属板、13a,
13b,13c,13d……スロット、14……金属管、14a……金属
板部分、15a,15b……スロット。1 is a partially cutaway side view of a magnetron embodying the present invention, FIG. 2 is a perspective view of a metal plate of the magnetron, FIG. 3 is a side sectional view of a main part of another embodiment of the present invention, FIG. FIG. 4 is a partially cutaway perspective view of a metal plate portion of the embodiment, FIG. 5 is a partially cutaway perspective view of a metal plate portion of another embodiment of the present invention, and FIG.
The figure is a partially broken side view of a conventional magnetron. 1 ... Anode cylinder, 2 ... Cathode, 3 ... Anode vane, 4,5
... magnetic pole piece, 6 ... exhaust pipe, 7 ... insulating pipe, 8 ... metal pipe, 9 ... microwave leading conductor, 12 ... metal plate, 13a,
13b, 13c, 13d: Slot, 14: Metal tube, 14a: Metal plate portion, 15a, 15b: Slot.
Claims (1)
絶縁管を介して金属製の排気管を封着し、前記陽極筒体
の内周面から陰極側へ突出した陽極ベインより延び出た
マイクロ波導出用導体を前記排気管に接続せしめてなる
マグネトロンにおいて、前記金属管に前記マイクロ波導
出用導体を包囲する円環状の金属板部分を有せしめ、こ
の金属板部分に発振マイクロ波の任意次高調波成分の約
4分の1波長に相当する電気長のスロットを有せしめて
なることを特徴とするマグネトロン。1. A metal exhaust pipe is sealed to one open end of an anode cylinder via a metal pipe and an insulating pipe, and an anode vane protruding from an inner peripheral surface of the anode cylinder to a cathode side. In a magnetron in which the extended microwave guiding conductor is connected to the exhaust pipe, the metal tube has an annular metal plate portion surrounding the microwave guiding conductor, and the metal plate portion has an oscillating microwave. A magnetron having slots having an electrical length corresponding to about a quarter wavelength of an arbitrary harmonic component of a wave.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10456388A JP2594316B2 (en) | 1988-04-27 | 1988-04-27 | Magnetron |
DE68913331T DE68913331T2 (en) | 1988-04-25 | 1989-04-12 | Magnetron. |
EP89106538A EP0339374B1 (en) | 1988-04-25 | 1989-04-12 | A magnetron |
US07/338,022 US5021713A (en) | 1988-04-25 | 1989-04-14 | Magnetron |
KR1019890005438A KR920010698B1 (en) | 1988-04-25 | 1989-04-25 | Magnetron having function of electro-magnetic wave leakage |
KR1019910020646A KR920010656B1 (en) | 1988-04-27 | 1991-11-20 | Magnetron having function of electromagnetic wave leakage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10456388A JP2594316B2 (en) | 1988-04-27 | 1988-04-27 | Magnetron |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01276540A JPH01276540A (en) | 1989-11-07 |
JP2594316B2 true JP2594316B2 (en) | 1997-03-26 |
Family
ID=14383927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10456388A Expired - Fee Related JP2594316B2 (en) | 1988-04-25 | 1988-04-27 | Magnetron |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2594316B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100783409B1 (en) * | 2005-12-27 | 2007-12-11 | 엘지전자 주식회사 | Magnetron |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109819578A (en) * | 2017-11-21 | 2019-05-28 | 核工业西南物理研究院 | A kind of Electron Cyclotron Resonance Heating system sliding pumping waveguide |
-
1988
- 1988-04-27 JP JP10456388A patent/JP2594316B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100783409B1 (en) * | 2005-12-27 | 2007-12-11 | 엘지전자 주식회사 | Magnetron |
Also Published As
Publication number | Publication date |
---|---|
JPH01276540A (en) | 1989-11-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |