Wearable Circular Monopole Antenna With A Bow-Tie Slot For WiMAX Applications

Recently, the wearable antennas are becoming an attractive research area for WiMAX applications due to its compact size, flexibility and ease of use. This paper introduces a compact wearable circular monopole textile antenna with a bowtie slot for wearable wireless communications. The proposed antenna is designed on denim jeans fabric (ϵ
r
= 1.77, tan δ = 0.03034) and it consists of a circular patch with a bow tie slot at the center. The overall dimension of the antenna is 30mm × 30mm × 0.7mm. The antenna operates at WiMAX frequency of 3.6 GHz with a return loss (S
11
) of -14.08 dB, bandwidth of 3.3 GHz to 4.3 GHz and a gain of 2.29 dBi at 3.6 GHz. The presence of a bow-tie slot in the circular patch is responsible for the compactness of the antenna. The performance analysis of the proposed antenna on different types of deformations such as bending along X axis and Y axis of concave and convex surfaces are carried out. The compactness and stable performance under bending conditions make the proposed compact antenna a propitious candidate for wireless body area networks.