A novel coplanar waveguide (CPW)-fed dual-band dual-mode patch antenna for on-/off-body communications is proposed. The proposed antenna, which comprises a T-shaped patch with parasitic patches, a circular patch, and a CPW feed line, has dimensions of 30 mm × 45 mm × 3.2 mm. The proposed antenna operates in the 2.4 GHz ISM band (2.4 -2.485 GHz) for off-body communication, and in the 5.8 GHz ISM band (5.725 -5.875 GHz) for on-body communication. The antenna has a patch-like radiation pattern in the 2.4 GHz ISM band and a monopole-like radiation pattern in the 5.8 GHz ISM band. Index Terms-Co-planar waveguide, Patch antenna, Low-profile, Monopole-like, Wireless body area network (WBAN) 1536-1225 (c)
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