University of Oulu

Khan AM, Ahmed MM, Rafique U. Experimental Study of RF–Plasma Interaction Using a Low-Pressure DC Glow Discharge Tube for MPC. Electronics. 2023; 12(3):551.

Experimental study of RF–plasma interaction using a low-pressure DC glow discharge tube for MPC

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Author: Khan, Asif Mehmood1; Ahmed, Muhammad Mansoor1; Rafique, Umair2
Organizations: 1Department of Electrical Engineering, Capital University of Science and Technology, Islamabad 44000, Pakistan
2Center for Wireless Communications, Faculty of Information Technology and Electrical Engineering, University of Oulu, 90570 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 6.4 MB)
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Language: English
Published: Multidisciplinary Digital Publishing Institute, 2023
Publish Date: 2023-08-21


This paper aims to perform experimental validation of RF–plasma interaction behaviors for the purposes of wave transmission and reflection. Wave reflection from plasma is of interest as it finds applications in pulse compression and RF polarizer-based systems. Simulations are performed using a combination of Magic3D and COMSOL multiphysics to characterize the plasma–wave interaction and discharge tube properties. The goal is to generate plasma with characteristics that wholly reflect the incident electromagnetic wave. A glass tube of inner diameter 22 mm and length 100 mm, with 12 mm brass electrodes, is fabricated for plasma generation. Argon-based DC glow discharge is sustained at 500 volts at a pressure of 3.8 Torr. Plasma density is calculated to be 2.529×10¹⁹ m⁻³, with a corresponding plasma frequency of 7.18 GHz. Due to this higher frequency, a 3 GHz incident RF wave is reflected, as measured through S-parameter measurements using a network analyzer. Off and on states of the tube correspond to 𝑆11=−40 dB and 𝑆11=−13 dB, which show wave transmission and reflection, respectively. When the plasma column is ignited, the reflected wave has a phase difference of 180∘.

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Series: Electronics
ISSN: 2079-9292
ISSN-E: 2079-9292
ISSN-L: 2079-9292
Volume: 12
Issue: 3
Article number: 551
DOI: 10.3390/electronics12030551
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Copyright information: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (