Demonstration of a PCM-Focused Sheet Beam TWT Amplifier at <i>G</i>-Band

Zhang, Changqing; Pan, Pan; Cai, Jian; Chen, Xueliang; Tian, Hanwen; Su, Siming; Zhou, Kangcheng; Wang, Meng; Li, Ying; Song, Biao; Gong, Yubin; Feng, Jinjun

doi:10.1109/ted.2022.3233291

Cited by 13 publications

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“…It has 34% bandwidth and an axial length of about 3λ. This design can meet the above four engineering requirements at the same time, so this scheme is adopted in manufacture [2]. But its axial length is still too long.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, compared to the linear beam TWTs, the sheet beam travelling-wave tube (SB-TWT) can increase the beam interaction size in one dimension and transmit larger current at the same time. More importantly, the SB-TWT focused by periodically cusped-magnetic (PCM) fields can make it possible to keep the advantages of the TWTs in low voltage, compact volume, and lightweight [2]. So it has attracted a host of attention.…”

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confidence: 99%

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Design of an ultrashort H‐plane coupler without transition structure for sheet beam traveling‐wave tube amplifier at W‐band

Guo,

Zhang,

Cai

et al. 2023

Electronics Letters

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An ultrashort H‐plane sheet beam traveling‐wave tube (SB‐TWT) coupler without transition structure is proposed. The coupler adopts a new idea of directly coupling the microwave from H‐plane of the slow‐wave circuit (SWC) and optimizes the matching by introducing an asymmetric circular ridge on the E‐plane of the coupled waveguide. As a result, the length of the SB‐TWT coupler is reduced from more than 3λ to 1λ. At the same time, the beam tunnel area is enlarged to twice that of the SWC beam tunnel. In the working band (90–100 GHz) of the SWC, the simulation results show that the reflection is less than −25 dB, the isolation is greater than −22 dB. And the influence of the dimensions and locations of ridge on the performance of the coupler is studied. Particle‐in‐cell simulation results also show that the new coupler can not only complete the microwave coupling well but also reduce the number of SWC periods.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%