Topology optimization of compact wideband coaxial-to-waveguide transitions with minimum-size control
Sign Up to like & getrecommendations! Published in 2018 at "Structural and Multidisciplinary Optimization"
DOI: 10.1007/s00158-017-1844-8
Abstract: This paper presents a density-based topology optimization approach to design compact wideband coaxial-to-waveguide transitions. The underlying optimization problem shows a strong self penalization towards binary solutions, which entails mesh-dependent designs that generally exhibit poor performance.… read more here.
Keywords: compact wideband; wideband coaxial; topology; topology optimization ... See more keywords
A Stable 0.2-THz Coaxial-Waveguide Gyrotron Traveling-Wave-Tube Amplifier with Distributed Losses
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Infrared, Millimeter, and Terahertz Waves"
DOI: 10.1007/s10762-016-0302-9
Abstract: For high-power operation, a THz gyrotron traveling-wave-tube (gyro-TWT) amplifier must operate in a high-order waveguide mode to enlarge the transverse dimension of an interaction waveguide. However, a gyro-TWT amplifier operating in a high-order waveguide mode… read more here.
Keywords: gyrotron traveling; coaxial waveguide; wave tube; distributed losses ... See more keywords
Theoretical investigations on radiation generation of TEM, linearly or circularly polarized TEn1 coaxial waveguide mode in relativistic magnetron
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-01583-w
Abstract: The physical mechanism of the radiation generation of all possible output modes of the relativistic magnetron (RM) with all cavity-magnetron axial extraction technique is theoretically analysed, and the necessary conditions for generating these modes are… read more here.
Keywords: mode; relativistic magnetron; circularly polarized; waveguide ... See more keywords
Wideband Antennas Using Coaxial Waveguide
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2021.3070121
Abstract: Waveguide arrays comprise slot radiators cut into hollow, single-mode, standing wave structures. Their impedance bandwidth and compactness are limited by the waveguide cutoff. By using the TEM mode of a coaxial waveguide, a more compact… read more here.
Keywords: coaxial waveguide; wideband antennas; using coaxial; waveguide ... See more keywords
Suppression of the Higher-Order Azimuthal Mode Competition in an ${X}$ -Band Triaxial Klystron Amplifier With a Slotted Coaxial Waveguide
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Electron Devices"
DOI: 10.1109/ted.2019.2963567
Abstract: Suppression of the higher-order azimuthal mode competition is significant in the design of an ${X}$ -band triaxial klystron amplifier (TKA), since coaxial waveguide cannot cut off the low-order coaxial TE modes. In this article, the… read more here.
Keywords: coaxial waveguide; slotted coaxial; mode; higher order ... See more keywords