Design and Test of 4.6 GHz 500 kW Continuous Wave 3 dB High Power Divider | Zendy

Dingzhen Li | Zendy; Lianmin Zhao | Zendy; Fukun Liu | Zendy; Hua Jia | Zendy; Min Cheng | Zendy; Xinsheng Yan | Zendy; Taian Zhou | Zendy

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Design and Test of 4.6 GHz 500 kW Continuous Wave 3 dB High Power Divider

Author(s) -

Dingzhen Li,

Lianmin Zhao,

Fukun Liu,

Hua Jia,

Min Cheng,

Xinsheng Yan,

Taian Zhou

Publication year - 2019

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2019.2932383

Subject(s) - power dividers and directional couplers , wilkinson power divider , electrical engineering , power (physics) , tokamak , division (mathematics) , current divider , physics , materials science , computer science , topology (electrical circuits) , frequency divider , engineering , mathematics , nuclear physics , plasma , arithmetic , quantum mechanics

A 500-kW continuous-wave (CW) high-power 3-dB divider is designed for the 4.6-GHz lower hybrid current drive system in the Experimental and Advanced Superconducting Tokamak (EAST). A multi-stepped structure is used to increase the power capacity, and a water cooling structure is introduced to reduce the thermal deformation and gas breakdown, which keeps the maximum steady-state temperature of the divider below 60 °C under full-power (500 kW) operation. The result of the simulations of the electric field shows that the power capacity of the multi-stepped structure is more than twice compared with the traditional design. Moreover, the divider shows excellent performance in the low-power test, with low return loss (−35 dB) and similar division ratio (

$S_{21}= -3.004$

dB and

$S_{31}= -3.035$

dB) at 4.6 GHz. Both the division ratio test and the full reflection test were carried out successfully under 250-kW CW, which suggests that the development of the 3-dB divider satisfies the design requirements.

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