[Poster Presentation]Design of a broadband millimeter-wave quasi-optical mode converter for the low power test platform of the ECRH system on J-TEXT

Design of a broadband millimeter-wave quasi-optical mode converter for the low power test platform of the ECRH system on J-TEXT

ID：92 Submission ID：117 View Protection：ATTENDEE Updated Time：2022-08-11 13:56:02 Hits：503 Poster Presentation

Start Time：2022-11-04 10:42 （Asia/Shanghai）

Duration：12min

Session：[F] High Magnetic Field Engineering and Fusion Technology » [PS4] Poster Session 4

Presentation File

Tips: The file permissions under this presentation are only for participants. You have not logged in yet and cannot view it temporarily.

Abstract

For the low power test platform of the ECRH system on J-TEXT, a broadband millimeter-wave quasi-optical mode converter from TE₁₁ mode to HE₁₁ mode is studied. The mode converter is a corrugated horn antenna with the sine-parallel profile. The effects of different slot numbers in the mode converter and slot picth on the bandwidth of corrugated horns are compared and the appropriate parameters were determined using mode matching method. The simulation results show that in the frequency from 90 GHz to 120 GHz, the relative power of the HE₁₁ mode can reach more than 97%, where the relative power of HE₁₁ mode at the center frequency 105 GHz can reach more than 98.8%. The designed sine-parallel profile has the advantage that the output beam waist radius is at the output port.

Keywords

mode converter,corrugated horn,mode matching

Speaker

Xianghao Kong

Huazhong University of Science and Technology

Submission Author

Xianghao Kong Huazhong University of Science and Technology

Zhongyong Chen Huazhong University of Science and Technology

Donghui Xia Huazhong University of Science and Technology