Performance Evaluation of Embroidered Disc-Shaped Textile Array Antenna for Measuring Radiated Emission

Technological development has influenced significant progress across various fields, particularly communication and electronic systems. Communication equipment must demonstrate resistance to electromagnetic (EM) waves, necessitating Electromagnetic Compatibility (EMC) and Electromagnetic Interference (EMI) testing, particularly regarding radiated emissions. This study proposes an innovative embroidered disc-shaped textile array antenna to address the challenges in radiated emission testing. The proposed array antenna is designed to operate at the frequency of 3.48 GHz, making it highly suitable for wearable and portable applications while ensuring compatibility with modern communication systems. The measurement of radiated emission is carried out in two conditions, namely flat and 50-mm bent, with radiated emission measurement under two polarizations, namely vertical and horizontal. The measurement results are compared with those of the Ultralog antenna, revealing that the electric field intensities for both Ultralog antenna and 50 mm-bent array antenna are higher under vertical polarization than horizontal polarization. These results underscore the potential of proposed array antenna for wearable devices, highlighting its ability to maintain the performance under bending conditions while satisfying standards in complex EM environments.