“…However, most of the reported CP antennas focus on the technical performance, for instance, wide bandwidth and high gain, 3,6 dual polarization, 4,5,7 rather than the hidden functionality. Recently, patch antennas embed Chinese character(s) into the antenna designs become popular, [8][9][10][11][12][13][14] which realized the hidden antennas that are suitable for indoor wireless communications to date. The first Chinesecharacter-shaped patch antenna, Wang-shaped patch was presented in 2010.…”