Waveguide bandstop filter based on irises and double corrugations for use in industrial microwave ovens

Clemente‐Fernández, Francisco Javier; Monzó‐Cabrera, Juan; Catalá-Civera, J.M.; Pedreño-Molina, J.L.; Guerrero, Antonio José Lozano; Díaz‐Morcillo, Alejandro

doi:10.1049/el.2012.1211

Cited by 5 publications

(9 citation statements)

References 3 publications

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“…2(b). Thus, if (8) is not easily met, the value of should be accordingly modified (typically reduced) and…”

Section: Design Methodsmentioning

confidence: 99%

“…, ( − 1)), the of each DE is calculated to satisfy (6). At the same time, , and , of each DE will be calculated by satisfying (7) and (8). Finally, the length of each section, , is straightforwardly computed by using (9).…”

Section: A Waffle-iron Filter With Transmission Zeros At One Frequencymentioning

confidence: 99%

“…Thus, and are readjusted to satisfy (6). After that, , , and , are calculated by fulfilling (7) and (8). If is high, it maximizes the high-power behavior but produces narrow stopbands.…”

Section: B Novel Waffle-iron Filter With Transmission Zeros At Multimentioning

confidence: 99%

“…HE classical waffle-iron filter is the typical waveguide lowpass solution when the suppression of the fundamental and the higher-order modes are required over a wide stopband (up to several harmonics). Invented in the 1940s [1], [2], this kind of rectangular waveguide filters is nowadays utilized in many widespread applications such as: antenna feeders [3], [4], output section of a satellite communication payload [5], [6], industrial fabrication processes employing microwaves in order to prevent the escape of radiation from the manufacturing chamber [7], [8], etcetera.…”

Section: Introductionmentioning

confidence: 99%

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Design Procedure for New Compact Waffle-Iron Filters With Transmission Zeros

Teberio

Percaz

Arregui

et al. 2018

IEEE Trans. Microwave Theory Techn.

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In this paper, a novel waffle-iron filter with transmission zeros at multiple frequencies, along with its design procedure, is presented. The proposed filter features a high-power behavior and a wide rejected band in a single compact structure by means of a set of transmission zeros that can also be placed close to the passband. Its design method rests on a divide-and-rule strategy, where the physical dimensions of the constituent design entities (DEs) can be easily computed in a very short time. A novel high-power compact waffle-iron filter with transmission zeros at multiple frequencies has been designed as well as several classical waffle-iron filters with transmission zeros at one frequency only, using a detailed step-by-step procedure which avoids the bruteforce optimizations needed until now. Multipactor and corona simulations have been conducted proving a high-power handling capability of 1.8 kW and 78.6 W, respectively. A prototype of the novel filter has been fabricated, obtaining a remarkable accordance between the simulated and measured results.

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“…2(b). Thus, if (8) is not easily met, the value of should be accordingly modified (typically reduced) and…”

Section: Design Methodsmentioning

confidence: 99%

Section: A Waffle-iron Filter With Transmission Zeros At One Frequencymentioning

confidence: 99%

“…Thus, and are readjusted to satisfy (6). After that, , , and , are calculated by fulfilling (7) and (8). If is high, it maximizes the high-power behavior but produces narrow stopbands.…”

Section: B Novel Waffle-iron Filter With Transmission Zeros At Multimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design Procedure for New Compact Waffle-Iron Filters With Transmission Zeros

Teberio

Percaz

Arregui

et al. 2018

IEEE Trans. Microwave Theory Techn.

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show abstract

“…The merit is smaller in size in the case of dual mode design in comparison to the equivalent single mode waveguide design. The demerit is frequency problem due to spurious modes [16,17]. The chief advantages of waveguide filters over other technologies are their ability to handle high power and low loss.…”

Section: Introductionmentioning

confidence: 99%

Multiple-band waveguide based band-stop filter

Patel

Kosta

2015

International Journal of Applied Electromagnetics and Mechanics

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This paper presents a novel transversal coupling network for the design of multiple-band bandstop filters. In this proposed structure, multiple-band bandstop filter is design based on amalgamated (conductive and dielectric material) posts coupled rectangular waveguide to demonstrate the feasibility of proposed network. We have proposed two structures using four metallic windows placed at the corners of triangle inside a waveguide and symmetrical dielectric material posts placed at the center of the triangle made by metallic posts. By inserting dielectric post, the results are improved. The structures are simulated with Ansoft's finite-element High Frequency Structure Simulator tool and its equivalent circuit of Ansoft designer to demonstrate the characteristics of this notch filter using a rectangular waveguide with center frequency of 11.2 GHz. The proposed structure using amalgamated post is fabricated and tested using the Vector Network Analyzer and obtained results compared with the simulated results.

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Microwave-Assisted Plant Extraction Processes

Mato

Monzó‐Cabrera

Sólyom

2016

Alternative Energy Sources for Green Chemistry

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Microwaves, as oscillating electromagnetic fields, are the perfect choice for rapid heating of dipolar molecules like water, and are thus of special interest in extraction processes for plant matrices. Volumetric microwave heating, in combination with solvent effects, can alter or damage cell structures, improving the extraction of compounds of interest. As a result, the enhanced extraction kinetics lead to more efficient processes, use less chemicals, have shorter extraction times, and provide higher extraction yields. This chapter aims to review the basic theory of microwave processing, providing useful information on the interaction between the plant matrix and the electromagnetic field, and the available bench-, pilot-, and industrial-scale applications. In addition, different microwave-assisted extraction strategies are outlined, together with a detailed description of the main process variables.

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Waveguide bandstop filter based on irises and double corrugations for use in industrial microwave ovens

Cited by 5 publications

References 3 publications

Design Procedure for New Compact Waffle-Iron Filters With Transmission Zeros

Design Procedure for New Compact Waffle-Iron Filters With Transmission Zeros

Multiple-band waveguide based band-stop filter

Microwave-Assisted Plant Extraction Processes

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