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. Author manuscript; available in PMC: 2019 Feb 27.
Published in final edited form as: Crit Rev Biomed Eng. 2018;46(6):495–521. doi: 10.1615/CritRevBiomedEng.2018028554

FIG. 12:

FIG. 12:

Techniques for reducing applicator diameter: (A) Matching network (adapted from Luyen et al.18); (b) reduced diameter by using a different dielectric material (adapted from Luyen et al.19); and (c) tapered balun (adapted from Luyen et al.20) (black: metal, grey: dielectric, white: air)