Design and Test of an Antenna Module Mock-Up for the EAST 4.6 GHz LHCD Launcher

JIA Hua (贾华); LIU Fukun (刘甫坤); LIU Liang (刘亮); CHENG Min (程敏); et al.

doi:10.1088/1009-0630/15/8/23

Plasma Science and Technology > 2013 > 15(8): 834-839. > DOI: 10.1088/1009-0630/15/8/23

JIA Hua (贾华), LIU Fukun (刘甫坤), LIU Liang (刘亮), CHENG Min (程敏), et al.. Design and Test of an Antenna Module Mock-Up for the EAST 4.6 GHz LHCD Launcher[J]. Plasma Science and Technology, 2013, 15(8): 834-839. DOI: 10.1088/1009-0630/15/8/23

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Design and Test of an Antenna Module Mock-Up for the EAST 4.6 GHz LHCD Launcher

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Funds: supported by Dean Foundation of Hefei Institute of Physical Science, CAS (No.Y15FZ10132) and National Natural Science Foundation of China (Nos.10905069, 11205195)

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Received Date: March 14, 2012

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Abstract

Abstract

The launcher of the 4.6 GHz lower hybrid current drive (LHCD) system for the Experimental Advanced Superconducting Tokamak (EAST) consists of 24 antenna modules, each composed of an array of 3 (row) × 8 (column) waveguides. In order to verify the radio frequency (RF) design and the feasibility of the manufacturing process, a mock-up of the module has been fabricated and measured. The measured return losses of all three input waveguides are less than −25 dB at a frequency of 4.6 GHz. The transmission coefficients from the input waveguide to the output waveguides are −9.13 ± 0.2 dB and the insertion loss is 0.104 dB. These good results mean that the design method of the antenna module can be used for the new 4.6 GHz launcher on EAST. The detailed design of the multi-junction antenna module and its initial test result are described in this paper.
- EAST,
- launcher,
- lower hybrid current drive

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