Tri band Semicircular Slit Based Wearable Antenna for Defense Applications
This article presents a novel tri band semicircular slit based wearable antenna covering defense and LTE applications. Initially, the proposed antenna is constructed with three adjusted minor semicircular slit cuts on the right top layer of the patch to obtain multiple responses at 2.48, 3.5, and 5 GHz. Simulations with iterative designs are carried using CST Microwave Studio EM simulator and experimentally measured 10 dB return loss impedance bandwidths are 34, 99, and 115 MHz, respectively, on the FR4 laminate. In addition, a parametric study is carried on to use the same prototype model as a wearable/off body antenna by choosing Jeans substrate with a dielectric constant of 1.7. At last, it is found that the optimized antenna with better radiation patterns preferably at low resonant band and also a stable high gain is obtained over all the operating bands.