Studying the effect of bending on the performance of flexible dual band microstrip monopole antenna

This paper investigates the effects of bending on the performance of a flexible dual-band printed monopole antenna designed to work for GPS, WLAN, and WiMAX applications. The antenna is printed on a Polyimide substrate with a relative permittivity of 4.3 and thickness of 25 pm. The antenna is fed by a coplanar waveguide transmission line to enhance the impedance matching over the wide operating bandwidth. The dual bands are (1.53–1.67) GHz and (2.95–5.8) GHz. The simulated and measured values are in good agreement in term of Sn before and after bending. The radiation patterns show excellent performance of the antenna in the applications under consideration. The antenna achieves a maximum gain of 2 dB over the first band and 3.6 dB over the second band.