EP1814364A3 - Magnetron - Google Patents

Magnetron Download PDF

Info

Publication number
EP1814364A3
EP1814364A3 EP07290106.9A EP07290106A EP1814364A3 EP 1814364 A3 EP1814364 A3 EP 1814364A3 EP 07290106 A EP07290106 A EP 07290106A EP 1814364 A3 EP1814364 A3 EP 1814364A3
Authority
EP
European Patent Office
Prior art keywords
suppressing
higher harmonic
high frequency
wave
magnetron
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.)
Granted
Application number
EP07290106.9A
Other languages
German (de)
French (fr)
Other versions
EP1814364A2 (en
EP1814364B1 (en
Inventor
M. c/o Toshiba Hokuto Electronics Corp. Higashi
Toshio Toshiba Corp. IP Division Kawaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Hokuto Electronics Corp
Original Assignee
Toshiba Hokuto Electronics Corp
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 Toshiba Hokuto Electronics Corp filed Critical Toshiba Hokuto Electronics Corp
Publication of EP1814364A2 publication Critical patent/EP1814364A2/en
Publication of EP1814364A3 publication Critical patent/EP1814364A3/en
Application granted granted Critical
Publication of EP1814364B1 publication Critical patent/EP1814364B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/14—Leading-in arrangements; Seals therefor
    • H01J23/15—Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/72—Radiators or antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/44—Rod-type coupling devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/54—Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuit; Prevention of high frequency leakage in the environment
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/74—Mode transformers or mode stirrers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microwave Tubes (AREA)

Abstract

Problems: To provide a magnetron having a λ/4 type choke structure suppressing higher harmonic wave components propagated in a higher order mode or suppressing an unnecessary radiation of the medium band interposed between two higher harmonic waves having frequencies of integer multiples of the fundamental wave.
Means for solving the problems: In a magnetron comprising a high frequency wave generating part 11 generating a high frequency wave, an antenna 24 extracting the high frequency wave, a cylindrical metallic envelope 18 surrounding the antenna 24 and a λ/4 type choke structure C2 suppressing a higher harmonic wave component propagated in a fundamental mode in the metallic envelope 18, another λ/4 type choke structure C1 suppressing a higher harmonic wave component propagated in a higher order mode in the metallic envelope has been provided.
EP07290106.9A 2006-01-30 2007-01-26 Magnetron Active EP1814364B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006020215A JP4898234B2 (en) 2006-01-30 2006-01-30 Magnetron

Publications (3)

Publication Number Publication Date
EP1814364A2 EP1814364A2 (en) 2007-08-01
EP1814364A3 true EP1814364A3 (en) 2013-04-17
EP1814364B1 EP1814364B1 (en) 2019-08-21

Family

ID=38006095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07290106.9A Active EP1814364B1 (en) 2006-01-30 2007-01-26 Magnetron

Country Status (4)

Country Link
EP (1) EP1814364B1 (en)
JP (1) JP4898234B2 (en)
KR (1) KR100811384B1 (en)
CN (1) CN100583369C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104253009A (en) * 2013-06-27 2014-12-31 乐金电子(天津)电器有限公司 Antenna fixing structure of magnetron for microwave oven
KR102082506B1 (en) * 2018-02-09 2020-02-27 엘지전자 주식회사 Magnetron having enhanced harmonics shielding performance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325780A (en) * 1997-05-31 1998-12-02 Lg Electronics Inc A choke for a magnetron of a microwave oven
EP1391909A2 (en) * 2002-07-31 2004-02-25 Matsushita Electric Industrial Co., Ltd. Magnetron
EP1521288A2 (en) * 2003-07-30 2005-04-06 Toshiba Hokuto Electronics Corporation Magnetron for microwave oven

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62122028A (en) * 1985-06-07 1987-06-03 Toshiba Corp Magnetron for microwave oven
JPH02230640A (en) * 1989-03-03 1990-09-13 Hitachi Ltd Magnetron
JPH1125870A (en) * 1997-06-27 1999-01-29 Sanyo Electric Co Ltd Magnetron
JP2004103550A (en) * 2002-07-18 2004-04-02 Matsushita Electric Ind Co Ltd Magnetron

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325780A (en) * 1997-05-31 1998-12-02 Lg Electronics Inc A choke for a magnetron of a microwave oven
EP1391909A2 (en) * 2002-07-31 2004-02-25 Matsushita Electric Industrial Co., Ltd. Magnetron
EP1521288A2 (en) * 2003-07-30 2005-04-06 Toshiba Hokuto Electronics Corporation Magnetron for microwave oven

Also Published As

Publication number Publication date
KR20070078795A (en) 2007-08-02
JP2007200790A (en) 2007-08-09
CN101013646A (en) 2007-08-08
JP4898234B2 (en) 2012-03-14
KR100811384B1 (en) 2008-03-07
EP1814364A2 (en) 2007-08-01
CN100583369C (en) 2010-01-20
EP1814364B1 (en) 2019-08-21

Similar Documents

Publication Publication Date Title
WO2004077606A3 (en) Earphone antenna, composite coil used therefor, coaxial cable, and radio device with the earphone antenna
EP1771057A3 (en) Radio wave shield
JP2008085869A5 (en)
EP2239846A3 (en) Acoustic wave resonator
TW200518383A (en) Low profile sector antenna configuration
CN102098070A (en) Communication terminal capable of effectively reducing HAC/SAR of antenna
EP1814364A3 (en) Magnetron
TW200703784A (en) Multi-frequency planar antenna
CN101212081A (en) Double-row left-hand microstrip line for improving electromagnetic radiation of mobile telephone
TWI488365B (en) Communication device
WO2007050965A3 (en) Plasma lamp with dielectric waveguide
CN206742469U (en) A kind of medium interdigital filter
CN202150852U (en) Radio frequency circuit capable of suppressing stray radiation and mobile phone
ATE487929T1 (en) WAVE TRANSITION AND HORN ANTENNA
HK1075134A1 (en) Attenuation or termination element having a coaxial structure for high frequency electromagnetic waves
TW201630250A (en) Antenna device and communication device using the same
US9543790B2 (en) Apparatus for transmitting magnetic resonance wireless power using higher order mode resonance, receiving terminal, and method for transmitting and receiving wireless power using the same
JP2004214577A (en) Packaging case for microwave integrated circuit
TWI264849B (en) Antenna structure for operating multi-band system
WO2004001787A3 (en) Micro-wave tube with mechanical frequency tuning
US8314666B2 (en) Resonator, elastic wave transmission element and fabrication method thereof
DE60139291D1 (en) Two-band microwave beam element
JP2007200790A5 (en)
TWI552432B (en) An antenna device used in the all-metal case of the lte/wwan system
CN202121573U (en) Communication terminal effectively reducing HAC/SAR of antenna

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

RIC1 Information provided on ipc code assigned before grant

Ipc: H05B 6/72 20060101AFI20130124BHEP

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

RIC1 Information provided on ipc code assigned before grant

Ipc: H05B 6/72 20060101AFI20130308BHEP

17P Request for examination filed

Effective date: 20131015

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20160421

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190320

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602007059075

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602007059075

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20200603

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230117

Year of fee payment: 17

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230525

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240119

Year of fee payment: 18

Ref country code: GB

Payment date: 20240119

Year of fee payment: 18