WO2002009134A2 - Method and device for generating electromagnetic fields having high field intensity and field homogeneity - Google Patents
Method and device for generating electromagnetic fields having high field intensity and field homogeneity Download PDFInfo
- Publication number
- WO2002009134A2 WO2002009134A2 PCT/DE2001/002808 DE0102808W WO0209134A2 WO 2002009134 A2 WO2002009134 A2 WO 2002009134A2 DE 0102808 W DE0102808 W DE 0102808W WO 0209134 A2 WO0209134 A2 WO 0209134A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- waveguide structure
- electromagnetic waves
- feed point
- point
- fed
- Prior art date
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
- H05B6/70—Feed lines
- H05B6/701—Feed lines using microwave applicators
-
- 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
- H05B6/70—Feed lines
- H05B6/705—Feed lines using microwave tuning
Definitions
- the invention relates to a method and a device for generating electromagnetic fields of high field strength and field strength homogeneity by means of waves advancing in one direction in areas of any size in which objects as well as solid, liquid and gaseous substances or substance mixtures (hereinafter called substances) in a ring-shaped closed waveguide waveguide structure for the purpose of changing its properties, nature, geometry, structure and composition under atmospheric or non-atmospheric conditions such as.
- substances substance mixtures
- Example overpressure, vacuum and gas composition can be treated, as well as for the purpose of energy storage and extraction.
- Microwaves are used in many areas. For example, in radio and television, in radar technology, in meteorology, in news transmission via satellites, in so-called radio relay, in material testing and for heating food.
- the microwave treatment of materials of a non-polar character is also known.
- a very high electrical field strength is required, which can either be achieved with a correspondingly high generator output or by using a resonator which, depending on the material to be treated, must be calculated and designed so that an area of high field strength is created.
- Both methods are very complex and usually only create small areas of high field strength or areas with high field strength inhomogeneities. Energy that is not converted in the material to be treated is reflected and extracted from the process by suitable means (circulator) and thus represents a loss.
- the object of the invention is to provide a method and a device for generating electromagnetic fields of high field strength and field strength homogeneity in arbitrarily large areas for low-loss and uniform treatment of substances and objects and / or low-loss energy storage and removal ,
- This problem is solved by a method in which electromagnetic fields of high field strength and field strength homogeneity are generated in the following manner by waves advancing in one direction within a wave-guiding ring-shaped closed waveguide structure: 1) The electromagnetic waves become a wave-guiding ring-shaped closed waveguide structure in a preferred direction fed. 2) The feeding of the feeding electromagnetic waves takes place at two points of the waveguide structure, in which the electromagnetic waves are divided up in such a way that the The share for the first feed point, viewed in the preferred direction, is smaller than the share for the second feed point.
- the electromagnetic waves that have passed through the waveguide structure in the preferred direction are divided at the first feed point in such a way that the fraction for the splitting point is smaller than the fraction for the second feed point.
- the share for the second feed point is divided at the second feed point in such a way that the share that runs in the direction of the split point is equal to the share that is fed from the first feed point to the split point and these two equally large shares with one Phase difference of 180 ° meet at the splitting point, so that a spreading of these parts at the splitting point is not possible and spreading in the waveguide structure is only forced in the preferred direction.
- At least a portion of the progressive electromagnetic waves running in the waveguide structure is fed to the first feed point with each revolution.
- substances and objects are introduced and exported into the waveguide structure, the substances and objects being treated under atmospheric or non-atmospheric conditions.
- the method also includes the removal of electromagnetic waves from the waveguide structure in order in this way to treat substances and objects that are located outside the waveguide structure with electromagnetic fields of high field strength.
- the device for performing the method is specified in claim 5.
- Fig. 2 shows a ring resonator with feedback of the reflected energy.
- the ring resonator 1 shows the basic structure of the device.
- the ring resonator 1 consists of a wave-guiding ring-shaped waveguide structure 2, directional coupler 5, treatment chamber 6 and phase shifter 7.
- the treatment chamber ⁇ is arranged in the area outside the directional coupler 5.
- the electromagnetic waves S fed into the ring resonator 1 by the generator 3 via the circulator 4 are largely forwarded via the directional coupler 5 only in one direction (preferred direction V), counterclockwise in FIG. 1. In this way, the ring resonator 1 does not remain converted energy after each revolution, due to the directivity of the directional coupler 5, in the ring resonator 1 and thus contributes to the in-phase amplification of the electric field.
- the directional coupler 5 consists of a waveguide waveguide structure with the splitting point A, the first feed point B and the second feed point C (points A, B and C), the lengths and the wave resistances of the waveguide sections between the points A, B and C, are dimensioned as a function of the working frequency used so that the required division and phase relationship of the electromagnetic waves at points A, B and C is realized
- the waveguides at points A, B and C can preferably be brought together at an angle of 120 ° to one another.
- a circulator 4 Arranged in the waveguide structure 2 is a circulator 4, which couples out reflected electromagnetic waves generated in the waveguide structure 2 from the waveguide structure 2.
- the treatment chamber 6 arranged in the waveguide structure 2 is at least partially formed from materials which are permeable to electromagnetic waves.
- phase shifter 7 angeord ⁇ net which, adjusts the resonant length is changed by the introduced into the treatment chamber 6 load 8 again.
- the device functions as follows:
- the electromagnetic waves S generated by the generator 3 are directed to the splitting point A, at which the splitting of the electromagnetic waves takes place in such a way that a portion is directed to the first feed point B and the further portion to the feed point C.
- the electromagnetic waves are fed to the waveguide structure 2 at the feed points B and C.
- the first feed point B is located in the preferred direction V before the second feed point C.
- the proportion for the first feed point B is smaller than the proportion for the second feed point C.
- the electromagnetic waves at the second feed point C are divided in such a way that the portion which runs counter to the preferred direction V is the same size as the portion which is fed to the first feed point B and these two equally large portions with a phase difference of 180 ° meet at the first feed point B, so that a spread of these portions at the first feed point B is not possible and a spread is only forced in the preferred direction V.
- the electromagnetic waves that have passed through the waveguide structure in the preferred direction are divided at the first feed point B in such a way that the fraction for the splitting point A is smaller than the fraction for the second feed point C.
- the portion for the second feed point C is divided at this second feed point C such that the portion that runs in the direction of the split point A is the same size as the portion that is fed from the first feed point B to the split point A and these two are of equal size Shares with a phase difference of 180 ° meet at the splitting point A, so that ne spreading of these parts at the distribution point is not possible and spreading in the waveguide structure is only forced in the preferred direction V.
- the electromagnetic waves running in the waveguide structure 2 in the preferred direction and the electromagnetic waves fed to the waveguide structure 2 are brought together in phase and add up, since at least a portion of the advancing electromagnetic waves traveling in the waveguide structure 2 reaches the first feed point B with each revolution.
- Fig., 2 shows a ring resonator 1 with feedback of the reflected electromagnetic waves R.
- a circulator 4 is arranged in the ring resonator 1, which reflects the reflected electromagnetic waves R couples out of the waveguide structure 2.
- These outcoupled electromagnetic waves R can be consumed in a termination load or can be fed back into the system in phase via a further directional coupler 5.
- the treatment chamber 6 should be dimensioned such that a linearly polarized waveform is retained in order to obtain a largely homogeneous electric field.
- the treatment chamber 6 must be adapted to the waveguide system in such a way that reflections of the electromagnetic waves are avoided. Electromagnetic waves of any frequency, eg 2.45 GHz, must be used for the power feed.
- the ring resonator 1 is to be dimensioned exactly in accordance with the operating frequency used.
- the effective running length changed by the load (substance / object to be treated) introduced into the treatment chamber can be adjusted again by a phase shifter 7 arranged in the ring resonator.
- the adaptation can preferably take place automatically during the treatment phase.
- the advantage of the method and the device according to the invention is in particular that the electromagnetic waves S fed into the ring resonator preferably travel only in one direction V and the energy components which are not converted in the load 8 located in the ring resonator via the waveguide structure 2 of the load 8 are fed back in, so that practically no energy losses occur.
- the electric field strength increases with each revolution until the field strength is reached, which guarantees a conversion of the entire feed power according to the load conditions.
- Another major advantage is that, depending on the frequency used, a larger spatial homogeneous zone of the electric field can be generated with advancing waves, which leads to a uniform treatment of the substances and objects.
- the ring resonator according to the invention can be used for storing and extracting energy.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Particle Accelerators (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10192978T DE10192978D2 (en) | 2000-07-21 | 2001-07-20 | Method and device for generating electromagnetic fields of high field strength and field strength homogeneity |
AU2001285684A AU2001285684A1 (en) | 2000-07-21 | 2001-07-20 | Method and device for generating electromagnetic fields having high field intensity and field homogeneity |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000135949 DE10035949A1 (en) | 2000-07-21 | 2000-07-21 | Method and device for generating electromagnetic fields of high field strength and field strength homogeneity |
DE10035949.3 | 2000-07-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002009134A2 true WO2002009134A2 (en) | 2002-01-31 |
WO2002009134A3 WO2002009134A3 (en) | 2002-04-25 |
Family
ID=7649992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/002808 WO2002009134A2 (en) | 2000-07-21 | 2001-07-20 | Method and device for generating electromagnetic fields having high field intensity and field homogeneity |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2001285684A1 (en) |
DE (2) | DE10035949A1 (en) |
WO (1) | WO2002009134A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2849343B1 (en) * | 2002-12-23 | 2009-01-23 | Aldivia | CHEMICAL SYNTHESIS COMPRISING THERMAL TREATMENT BY INTERMITTENT DIELECTRIC HEATING, COMBINED WITH A RECIRCULATION SYSTEM |
DE102005051173A1 (en) * | 2005-10-24 | 2007-04-26 | Eastman Kodak Co. | Method for applying microwaves onto flat object, especially print material of ink-jet printer, utilizes unused reflected reverse microwave power for activation at another site or at another time |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3277400A (en) * | 1964-04-27 | 1966-10-04 | Oresto J Digiondomenico | Low loss ferrite power circulator operating as a power combiner or power divider |
GB1159279A (en) * | 1967-01-25 | 1969-07-23 | Ass Elect Ind | Improvements relating to R.F. Heating Apparatus |
US3710063A (en) * | 1971-05-25 | 1973-01-09 | H Aine | Microwave applicator |
US3761665A (en) * | 1972-05-25 | 1973-09-25 | Tokyo Shibaura Electric Co | Microwave heating apparatus with looped wave guide and phase shifting means |
DE2239425C3 (en) * | 1972-08-10 | 1978-04-20 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Process for the electrolytic treatment of niobium surfaces for alternating current applications |
US4219758A (en) * | 1978-11-30 | 1980-08-26 | Varian Associates, Inc. | Traveling wave tube with non-reciprocal attenuating adjunct |
FR2552613A1 (en) * | 1983-09-28 | 1985-03-29 | Thourel Leo | Microwave heating device |
US4714810A (en) * | 1986-07-28 | 1987-12-22 | Arizona Board Of Regents | Means and methods for heating semiconductor ribbons and wafers with microwvaes |
FR2689717B1 (en) * | 1992-04-03 | 1994-05-13 | Commissariat A Energie Atomique | MICROWAVE APPLICATION DEVICE AND PLASMA REACTOR USING THE SAME. |
US5608361A (en) * | 1995-05-15 | 1997-03-04 | Massachusetts Institute Of Technology | Advanced ring-network circulator |
-
2000
- 2000-07-21 DE DE2000135949 patent/DE10035949A1/en not_active Withdrawn
-
2001
- 2001-07-20 WO PCT/DE2001/002808 patent/WO2002009134A2/en active Application Filing
- 2001-07-20 AU AU2001285684A patent/AU2001285684A1/en not_active Abandoned
- 2001-07-20 DE DE10192978T patent/DE10192978D2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
AU2001285684A1 (en) | 2002-02-05 |
WO2002009134A3 (en) | 2002-04-25 |
DE10192978D2 (en) | 2003-08-28 |
DE10035949A1 (en) | 2002-02-07 |
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