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Prototype TM 01 mode launcher by using Pagoda‐shaped geometry in circular waveguide for microwave plasma interaction experiments at SYMPLE
Author(s) -
Kumar Jitendra,
Singh Raj,
Anitha V.P.
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21957
Subject(s) - microwave , plasma , physics , optics , waveguide , return loss , mode (computer interface) , coaxial , microwave transmission , acoustics , electrical engineering , engineering , antenna (radio) , computer science , quantum mechanics , operating system
SY stem for M icrowave PL asma E xperiments (SYMPLE) is an experimental system to investigate the physics of linear and nonlinear interaction of high‐power microwave (HPM) with plasma in the Institute for Plasma Research (IPR), Gandhinagar, India. The objective of this paper was to present the designing and development of coaxial TEM to TM 01 mode launcher in the circular waveguide for microwave plasma interaction experiments at SYMPLE. TEM mode was converted into TM 01 mode by using aluminum made circular Pagoda‐shaped geometry. TM 01 mode launcher was hence successfully designed and developed. 3D full‐wave electromagnetic solver was used to analyze and optimize the outcomes. The proposed configuration of mode launcher achieved the bandwidth of 658 MHz for S 11 < −10 dB. The maximum value of achieved return loss was ~40 dB while insertion loss was ~0 dB at 3 GHz, which verified the ~100% transmission of power without any reflections. Mode purity was also verified by field distribution in the circular waveguide.