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. 2021 May 21;13(11):1678. doi: 10.3390/polym13111678

Figure 2.

Figure 2

Schematics of different types of microwave discharges in liquids: (a) discharge on the base of quarter-wavelength antenna; (b) discharge on the base of slot antenna; (c) discharge with energy input through the coaxial line; and (d) microwave discharge in combination with ultrasonic radiation.