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Inductive coupled coil is an antenna structure that can easily realize multiple resonant frequencies with planar structure for MHz band wireless capsule endoscopic (WCE) communication. However, since one resonant frequency is generated by one coil, the antenna size is large when designing multi-band antennas. In this paper, the antenna matching circuit is modified to be a series circuit with an LC tank so that one coil can generate two resonant frequencies. For the receiving antenna, thisdoi:10.1587/comex.2018xbl0151 fatcat:agqc736qoreenb6ay567ujjdju