dual band slotted patch antenna for on/off-body communications

body centric wireless communication (bcwc) has been the topic of much research in recent years. in this manuscript, a novel low-cost microstrip patch antenna is designed for on-/off-body communications with a dual-band operation. the proposed structure exhibits a monopole-like radiation pattern at 2.45ghz and a broadside radiation at 4.8ghz, simultaneously. lateral dimensions of 42 mm × 46 mm and a low profile foam substrate with the thickness of 2.5 mm are considered for the dual-mode presented antenna. the proposed low-cost structure is fabricated and the stability of its performances under the human body effects is investigated through both simulation and measurement results. the experimental results are in good agreement with the simulated ones.