Flexible Screen-Printed Antenna for 5G n260 Band

In this work, screen-printed antennas fabricated on <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$25 \mu \mathrm{m}$</tex> polyimide substrate operating at the 37-40 GHz 5G n260 mmWave frequency band are presented. Antenna return loss was simulated and compared with measurements from the frequency range of 20 to 40 GHz. A printing speed of 10,000 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{mm}^{2}/\mathrm{s}$</tex> was achieved which demonstrates the viability of using screen-printing as a high-throughput manufacturing technique for flexible printed sensors and systems. A minimum bend radius of 3 mm was measured for the flexible antenna. To authors' knowledge, this is the lowest bending radius achieved for screen-printed antennas operating at 40 GHz.