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. 2021 Apr 19;11:8475. doi: 10.1038/s41598-021-88078-x

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Configuration of the diode region of the HPM generator “Chundoong”. The emitter cathode used for the emission of electron beam. The anode and cathode gap distance was 10 mm and the high power microwaves (HPM) were generated with a frequency of 3.5 GHz from the dense virtual cathode (VC) and propagated outside from the window of the waveguide. The bilological solutions were positioned 30 cm away from the window. The WR-284 is the receiving antenna which is used to measure the power of HPM. The HPM then passes through the power divder to divde the power into two equal amounts, attenuator, and a crystal detector by coaxial wire for the traces of the waveforms at oscilloscope in the electromagnetically shielded room.