Reconfigurable dual notch band antenna on Si-substrate integrated with RF MEMS SP4T switch for GPS, 3G, 4G, bluetooth, UWB and close range radar applications

Abstract In this paper, a reconfigurable co-planner waveguide (CPW) fed circular shaped monopole ultra wide band (UWB) antenna with dual band notch characteristics based on silicon substrate is presented. The dual notch band characteristics are realized by inserting two slots, namely, U- and I-shaped, in the circular radiating patch to switch-off the WiMAX IEEE 802.16 (3.30–3.80 GHz) and WLAN IEEE 802.11a/h/j/n (5.15–5.35 GHz, 5.25–5.35 GHz, 5.47–5.725 GHz, 5.725–5.825 GHz) respectively. The reconfigurability from antenna is achieved by integrating the radio frequency micro-electro mechanical system based single pole four through (RF MEMS SP4T) switch in the U- and I-shaped slots of radiating patch. The measured results demonstrate the bandwidth of 0.68–16.23 GHz resulting in fractional bandwidth of 183.91%, and are well in accordance with the simulation results. The gain of proposed antenna varies from 2.58 to 5.05 dBi with radiation efficiency of 83–95% and exhibits the omnidirectional like pattern in H-plane and nearly dipole like pattern in the E-plane. Further, the performance of proposed antenna is analyzed by implementing an equivalent RLC resonant circuit model in both the frequency and time domain.