Experimental Study of Discharge with Flexible Electrodes at Intermediate Pressure for Radar Cross Section Reduction

Jang Jae Lee; Chul Hee Cho; Min Su Choi; Chang Seok Cho; Tae Joo Oh; Yong Shik Lee; Jin Woo Yim; Heung Cheol Yoo; Hee Soo Jung; Shin Jae You

doi:10.5757/ASCT.2021.30.5.141

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Applied Science and Convergence Technology 2021; 30(5): 141-145

Published online September 30, 2021

https://doi.org/10.5757/ASCT.2021.30.5.141

Experimental Study of Discharge with Flexible Electrodes at Intermediate Pressure for Radar Cross Section Reduction

Jang Jae Lee^a , Chul Hee Cho^a , Min Su Choi^a , Chang Seok Cho^b , Tae Joo Oh^b , Yong Shik Lee^b , Jin Woo Yim^c , Heung Cheol Yoo^c , Hee Soo Jung^c , and Shin Jae You^{a , d , *}

^aApplied Physics Laboratory for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of Korea
^bDepartment of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
^cAgency for Defense Development (ADD), Daejeon 34186, Republic of Korea
^dInstitute of Quantum Systems (IQS), Chungnam National University, Daejeon 34134, Republic of Korea

Correspondence to:sjyou@cnu.ac.kr

Received: August 23, 2021; Revised: September 16, 2021; Accepted: September 17, 2021

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Abstract

In this experimental research, the characteristics of the discharge generated using a flexible electrode at intermediate pressure were investigated. We confirmed the discharge patterns according to the pulse width and frequency of a pulse generator with a fixed voltage under a pressure of 0.3 atm, which is the pressure at a typical flight altitude. Uniform discharge was found to occur at a frequency of 10 kHz with a pulse width of 4 µs and at a frequency of 20 kHz with a pulse width of 3 µs. To analyze the trend of discharge patterns, the voltage and current waveforms of the discharge in each condition were measured. In addition, the power dissipated by one cycle was calculated from the measured voltage and current waveforms. From the measurement and calculation results, it was confirmed that the dissipated power was large when the discharge occurred at a frequency of 20 kHz with a pulse width of 3 µs, that is, the brighter and more uniform discharge pattern, which was found to be the optimal discharge condition for the flexible electrode at a pressure of 0.3 atm.

Keywords: Flexible electrode, Intermediate pressure, Plasma, Radar cross section