The following publications are possibly variants of this publication:
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- Characteristics of Built-In Folded Monopole Antenna for HandsetsShogo Hayashida, Tomoki Tanaka, Hisashi Morishita, Yoshio Koyanagi, Kyohei Fujimoto. ieicet, 88-B(6):2275-2283, 2005. [doi]
- Compact Built-In Handset MIMO Antenna Using L-Shaped Folded Monopole AntennasYongho Kim, Toshiteru Hayashi, Yoshio Koyanagi, Hisashi Morishita. ieicet, 91-B(6):1743-1751, 2008. [doi]