Bragg reflection band stop filter for ECE on WEGA

Wagner, Stefan; Kasparek,; Leuterer,; Monaco,; Munich,; Schutz,; Stange,; Stober,; Thumm,

doi:10.1109/irmmw-thz.2011.6105143

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two- frequency notch filters for the electron cyclotron emission (ECE) diagnostic systems both at the ASDEX Upgrade tokamak experiment at IPP Garching and the W7-X stellarator at IPP Greifswald were successfully realized applying advanced waveguide Bragg reflectors [8,9]. In the present paper, a much simpler and compact approach based on standard waveguide resonators with rectangular cross-section [10][11][12][13] is presented. The filter described in this paper is designed for application in ECE systems which are operated over a wide frequency range.…”

Section: Introductionmentioning

confidence: 99%

A Compact Two-Frequency Notch Filter for Millimeter Wave Plasma Diagnostics

Wágner

Kasparek

Leuterer

et al. 2020

J Infrared Milli Terahz Waves

Self Cite

View full text Add to dashboard Cite

Sensitive millimeter wave diagnostics in magnetic confinement plasma fusion experiments need protection from gyrotron stray radiation in the plasma vessel. Modern electron cyclotron resonance heating (ECRH) systems take advantage of multi-frequency gyrotrons. This means that the frequency band of some millimeter wave diagnostics contains more than one narrow-band gyrotron-frequency line, which needs to be effectively suppressed. A compact standard waveguide notch filter based on coupled waveguide resonators with rectangular cross-section is presented which can provide very high suppression of several gyrotron frequencies and has low insertion loss of the passband.

show abstract

Section: Introductionmentioning

confidence: 99%

A Compact Two-Frequency Notch Filter for Millimeter Wave Plasma Diagnostics

Wágner

Kasparek

Leuterer

et al. 2020

J Infrared Milli Terahz Waves

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a result of these efforts, many functional components using periodic structures have been proposed and then widely applied in the fields of radio frequency (RF) electronics, microwave electronics and optoelectronics. They include reflectors [5], filters [6]- [8], couplers [9], [10] and resonators [11]. In practice, periodic structures are implemented in various forms and materials to meet the needs of specific applications, with particular operating frequency bands and power capacities.…”

Section: Introductionmentioning

confidence: 99%

Bandgap Control of Two-Dimensional Coaxial Bragg Structures With Helically Corrugated Conductors

Lai

Jiang

Chen³

et al. 2020

IEEE Access

View full text Add to dashboard Cite

The untunable bandgap is a difficult problem for Bragg structures constructed from corrugated metallic waveguides, and becomes a major barrier for applications. Based on the coupled-mode theory, this paper presents the principle as well as a corresponding theoretical model of bandgap control of two-dimensional coaxial Bragg structures under the condition of a fixed ripple shape. It is shown that such control can be achieved by varying the angular deviation between the outer and inner corrugations, which can be done by rotating one of the conductors relative to the other. The effects of the proposed method on transmission bandgap control of two example structures were investigated by theoretical analysis and electromagnetic simulation. The results confirmed the validity of the proposal, and showed that such a control method can be used to manipulate the number and location of the working bands under multiple bandgap operation. These peculiarities provide potential applications of two-dimensional coaxial Bragg structures in constructing tunable passive and active high-power microwave devices.

show abstract