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Automatic Measurement of Magnetron Rieke Diagrams

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Automatic Measurement of Magnetron Rieke Diagrams

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dc.contributor.author Bilik, Vladimir es_ES
dc.date.accessioned 2019-11-05T07:31:15Z
dc.date.available 2019-11-05T07:31:15Z
dc.date.issued 2019-10-15
dc.identifier.isbn 9788490487198
dc.identifier.uri http://hdl.handle.net/10251/130217
dc.description.abstract [EN] A Rieke diagram [1] is a magnetron characteristic that visualizes the dependence of the generated frequency fg and the net delivered power PL on the load reflection coefficient GR. GR is defined in a specific magnetron-to-waveguide coupling structure called the standard or reference launcher (Fig. 1). The diagram is plotted as a family of isolines of constant fg and of constant PL in the polar diagram of GR. Rieke diagrams are essential in the design of applications without isolators, such as domestic or professional microwave ovens. Constructing Rieke diagrams is tedious, time-consuming and equipment-demanding [2], [3], preventing systematic studies of their dependence on operating conditions, such as anode voltage and its ripple, filament current, mounting repeatability, etc. We have devised a procedure, centering around a high-power automatic impedance matching device (autotuner), which enables fully automatic measurement and plotting of the stated dependences. A block diagram of the setup is shown in Fig. 1. The autotuner, when terminated in a match (waterload), can accomplish a task inverse to impedance matching: realizing any desired reflection coefficient GR. The measurement consists of stepping through a grid of n suitably chosen reflection coefficients GR = xR + jyR, covering a desired area of the polar diagram. Each GR is measured accurately by the autotuner, along with the corresponding fg and PL. Thus, raw data for constructing a Rieke diagram are obtained, the data consisting of a collection of n points {GR, fg, PL}i, i = 1…n, with GR, in general, irregularly scattered in the complex plane. A dedicated MATLAB routine then reads the data, sorts them out to create tabulated functions fg = f(xR, yR), PL = f(xR, yR), approximates these by a 2D spline, and uses the splines to plot smoothed isocontours for chosen constant values of fg and PL, completing thus the desired Rieke diagram construction. We will present details of this procedure as well as real-life examples. Fig. 1. Rieke diagram measurement setup. es_ES
dc.format.extent 9 es_ES
dc.language Inglés es_ES
dc.publisher Editorial Universitat Politècnica de València es_ES
dc.relation.ispartof AMPERE 2019. 17th International Conference on Microwave and High Frequency Heating es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Energy Production by Microwaves es_ES
dc.subject Microwave CVD es_ES
dc.subject EM Modelling es_ES
dc.subject Microwave Material interaction es_ES
dc.subject Dielectric Properties es_ES
dc.subject Dielectric Properties Measurement es_ES
dc.subject Solid State Microwave es_ES
dc.subject Microwave Processing es_ES
dc.subject Microwave Chemistry es_ES
dc.subject Microwave applicators design es_ES
dc.subject Rieke diagram es_ES
dc.subject Magnetron es_ES
dc.subject High-power vector reflectometer es_ES
dc.title Automatic Measurement of Magnetron Rieke Diagrams es_ES
dc.type Capítulo de libro es_ES
dc.type Comunicación en congreso es_ES
dc.identifier.doi 10.4995/AMPERE2019.2019.9782
dc.rights.accessRights Abierto es_ES
dc.description.bibliographicCitation Bilik, V. (2019). Automatic Measurement of Magnetron Rieke Diagrams. En AMPERE 2019. 17th International Conference on Microwave and High Frequency Heating. Editorial Universitat Politècnica de València. 478-486. https://doi.org/10.4995/AMPERE2019.2019.9782 es_ES
dc.description.accrualMethod OCS es_ES
dc.relation.conferencename Ampere 2019 es_ES
dc.relation.conferencedate Septiembre 09-12, 2019 es_ES
dc.relation.conferenceplace Valencia, Spain es_ES
dc.relation.publisherversion http://ocs.editorial.upv.es/index.php/AMPERE2019/AMPERE2019/paper/view/9782 es_ES
dc.description.upvformatpinicio 478 es_ES
dc.description.upvformatpfin 486 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.relation.pasarela OCS\9782 es_ES


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