GB1255690A - Improvements in or relating to waveguides - Google Patents

Improvements in or relating to waveguides

Info

Publication number
GB1255690A
GB1255690A GB51336/69A GB5133669A GB1255690A GB 1255690 A GB1255690 A GB 1255690A GB 51336/69 A GB51336/69 A GB 51336/69A GB 5133669 A GB5133669 A GB 5133669A GB 1255690 A GB1255690 A GB 1255690A
Authority
GB
United Kingdom
Prior art keywords
ridges
waveguide
workpiece
pairs
oct
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
Application number
GB51336/69A
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.)
Canadian Patents and Development Ltd
Original Assignee
Canadian Patents and Development Ltd
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 Canadian Patents and Development Ltd filed Critical Canadian Patents and Development Ltd
Publication of GB1255690A publication Critical patent/GB1255690A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H05B6/78—Arrangements for continuous movement of material
    • H05B6/782—Arrangements for continuous movement of material wherein the material moved is food
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0037—Particular feeding systems linear waveguide fed arrays
    • H01Q21/0043—Slotted waveguides

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Abstract

1,255,690. Microwave heating apparatus; aerials. CANADIAN PATENTS & DEVELOPMENT Ltd. 20 Oct., 1969 [21 Oct., 1968], No. 51336/69. Headings H4A and H5H. The proportion of energy which is available for useful work is varied along the length of a waveguide by means of a ridge or ridges. Thus, the rectangular waveguide 10 is provided with two pairs of ridges 14, 15 and 16, 17 between which the electric field is concentrated. The presence of the ridges produces a decreased intensity in the vicinity of a workpiece 13 (e.g. a tube containing material to be heated or a set of axially aligned radiating slots). The ridges may be tapered to obtain a longitudinal variation in distribution of the field, e.g. in order to compensate for attentuation and to obtain uniform heating or radiation. The tapering may be linear or curvilinear. This effect may also be achieved by means of graded dielectric loading near the narrow sides of the waveguide. The Specification also describes an elliptical waveguide with two pairs of ridges (Fig. 5, not shown) and a rectangular waveguide with more than two pairs of ridges. The workpiece may consist of a lamina moving through longitudinal slots in the waveguide in a direction parallel with the narrow sides. Alternatively, the workpiece may move parallel to the axis of the guide and be so arranged that the parts to be heated are located between the opposed ridges. Where the waveguide is used as an aerial, the ridges are stated to have the effect of reducing side lobes.
GB51336/69A 1968-10-21 1969-10-20 Improvements in or relating to waveguides Expired GB1255690A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76909068A 1968-10-21 1968-10-21

Publications (1)

Publication Number Publication Date
GB1255690A true GB1255690A (en) 1971-12-01

Family

ID=25084429

Family Applications (2)

Application Number Title Priority Date Filing Date
GB51336/69A Expired GB1255690A (en) 1968-10-21 1969-10-20 Improvements in or relating to waveguides
GB7444/71A Expired GB1256339A (en) 1968-10-21 1969-10-20 Improvements in or relating to wave-guides

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB7444/71A Expired GB1256339A (en) 1968-10-21 1969-10-20 Improvements in or relating to wave-guides

Country Status (5)

Country Link
US (1) US3555232A (en)
DE (1) DE1952987C3 (en)
FR (1) FR2021167A1 (en)
GB (2) GB1255690A (en)
SE (1) SE345786B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2483158A1 (en) * 1980-05-23 1981-11-27 Jung Gmbh MICROWAVE HEATING DEVICE FOR CIRCULAR FLUIDS

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2120402A5 (en) * 1970-12-31 1972-08-18 Soulier Joel
BE776652A (en) * 1970-12-31 1972-04-04 Soulier Joel H A DEVICE FOR THE UNIFORMIZATION OF HYPERFREQUENCY ENERGY APPLIED TO A STRIP OR SHEET TO BE TREATED FROM A RESONANT CAVITY
US3764768A (en) * 1971-08-16 1973-10-09 W Sayer Microwave applicator employing a broadside slot radiator
US3846606A (en) * 1972-09-27 1974-11-05 Raytheon Co Microwave energy applicator
SE378057B (en) * 1974-02-22 1975-08-11 Stiftelsen Inst Mikrovags
US4035598A (en) * 1974-10-22 1977-07-12 Johannes Menschner Maschinenfabrik Gmbh & Co. Kg. Apparatus for thermally treating polymeric workpieces with microwave energy
US3987454A (en) * 1975-06-23 1976-10-19 Gte Sylvania Inc. Log-periodic longitudinal slot antenna array excited by a waveguide with a conductive ridge
US3990079A (en) * 1975-06-23 1976-11-02 Gte Sylvania Incorporated Log-periodic longitudinal slot antenna array excited by a waveguide with a conductive ridge
US4144434A (en) * 1976-06-14 1979-03-13 Societe Lignes Telegraphiques Et Telephoniques Microwave heating devices
US4160144A (en) * 1978-01-25 1979-07-03 Canadian Patents And Development Limited Single-sided microwave applicator for sealing cartons
FR2459721A1 (en) * 1979-06-22 1981-01-16 Jacomino Jean Marie Automatic control of molecular reticulation of vulcanisation - of elastomers by passage through excited resonator cavity
JP2614887B2 (en) * 1988-02-18 1997-05-28 甚一 松田 Local heating device and three-dimensional resonator for local heating
AU4487789A (en) * 1988-10-25 1990-05-14 Industrial Microwave Applications Pty. Limited Microwave pipe warmer
JP2888608B2 (en) * 1990-06-01 1999-05-10 義明 齊藤 Electromagnetic wave heating device
US5279788A (en) * 1991-01-24 1994-01-18 Eisai Co., Ltd. Sterilizer for sealed container utilizing microwave
US5442160A (en) * 1992-01-22 1995-08-15 Avco Corporation Microwave fiber coating apparatus
FR2723499B1 (en) * 1994-08-05 1996-10-31 Sa Microondes Energie Systemes MICROWAVE APPLICATOR DEVICE FOR THE CONTINUOUS HEAT TREATMENT OF ELONGATE PRODUCTS
US5543605A (en) * 1995-04-13 1996-08-06 Avco Corporation Microwave fiber coating apparatus
KR100186479B1 (en) * 1996-07-11 1999-03-20 구자홍 Waveguide structure of microwave oven
US5998774A (en) * 1997-03-07 1999-12-07 Industrial Microwave Systems, Inc. Electromagnetic exposure chamber for improved heating
US6265702B1 (en) 1999-04-28 2001-07-24 Industrial Microwave Systems, Inc. Electromagnetic exposure chamber with a focal region
US6753516B1 (en) 1999-12-07 2004-06-22 Industrial Microwave Systems, L.L.C. Method and apparatus for controlling an electric field intensity within a waveguide
US6965099B1 (en) * 2000-08-28 2005-11-15 Georgia Tech Research Corporation Geometry for web microwave heating or drying to a desired profile in a waveguide
US7470876B2 (en) * 2005-12-14 2008-12-30 Industrial Microwave Systems, L.L.C. Waveguide exposure chamber for heating and drying material
NL2000448C2 (en) * 2006-03-21 2010-09-13 Sonder Food Systems B V DEVICE FOR PASTEURIZING A MASS OF FOODSTUFF.
US20130303351A1 (en) 2006-04-03 2013-11-14 Lbp Manufacturing, Inc. Microwave heating of heat-expandable materials for making packaging substrates and products
CN102275691B (en) 2006-04-03 2014-03-26 Lbp制造业公司 Thermally activatable insulating packaging
US9522772B2 (en) 2006-04-03 2016-12-20 Lbp Manufacturing Llc Insulating packaging
US8076997B2 (en) 2006-05-31 2011-12-13 Telecom Italia S.P.A. Continously tunable waveguide delay line having a displaceable perturbing member
EP2127019B1 (en) * 2006-11-30 2017-07-19 Pirelli & C. S.p.A. A delay element and a corresponding method
US7368692B1 (en) * 2007-01-26 2008-05-06 Industrial Microwave Systems, L.L.C. Ridged serpentine waveguide applicator
EP2086285A1 (en) * 2008-02-01 2009-08-05 Anton Paar GmbH Applicator and Apparatus for heating samples by microwave radiation
CA2765878A1 (en) * 2008-06-19 2009-12-23 Microcoal, Inc. System and method for treatment of materials by electromagnetic radiation (emr)
US8426784B2 (en) * 2008-07-18 2013-04-23 Industrial Microwave Systems, Llc Multi-stage cylindrical waveguide applicator systems
US9184593B2 (en) 2012-02-28 2015-11-10 Microcoal Inc. Method and apparatus for storing power from irregular and poorly controlled power sources
EP3180960A1 (en) * 2014-08-14 2017-06-21 LBP Manufacturing LLC Waveguide exposure chamber for a microwave energy applicator
US9810480B2 (en) 2015-06-12 2017-11-07 Targeted Microwave Solutions Inc. Methods and apparatus for electromagnetic processing of phyllosilicate minerals
TWI632730B (en) * 2016-11-29 2018-08-11 天邁科技股份有限公司 Method of manufacturing waveguide assembly and structure thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL248295A (en) * 1958-08-11
US3197601A (en) * 1962-01-26 1965-07-27 Uarco Inc Heat treating apparatus
US3353968A (en) * 1963-02-01 1967-11-21 Litton Prec Products Inc Food package for use in microwave heating apparatus
US3193830A (en) * 1963-07-25 1965-07-06 Joseph H Provencher Multifrequency dual ridge waveguide slot antenna
GB1099357A (en) * 1964-06-02 1968-01-17 Ass Elect Ind Improvements relating to the heating of organic substances by electrical energy at microwave frequencies
US3465114A (en) * 1966-09-19 1969-09-02 Canadian Patents Dev Method and apparatus for dielectric heating
SE311055B (en) * 1966-10-19 1969-05-27 P Hedvall
US3456355A (en) * 1967-11-22 1969-07-22 Canadian Patents Dev Microwave dryer for drying the glue line in paper forms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2483158A1 (en) * 1980-05-23 1981-11-27 Jung Gmbh MICROWAVE HEATING DEVICE FOR CIRCULAR FLUIDS

Also Published As

Publication number Publication date
DE1952987C3 (en) 1974-10-31
US3555232A (en) 1971-01-12
GB1256339A (en) 1971-12-08
FR2021167A1 (en) 1970-07-17
DE1952987A1 (en) 1970-05-06
DE1952987B2 (en) 1974-03-28
SE345786B (en) 1972-06-05

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