Multi band Frequency Reconfigurable Dielectric Resonator Antenna for multiple wireless application

Abstract

In this work, a multiband frequency reconfigurable Dielectric Resonator Antenna for different wireless protocols has been discussed. The overall design consists of Dielectric Resonator (DR) placed on Fr4 substrate. The resonator is excited by CPW (coplanar waveguide). The feedline, ground and radiator are positioned on the same surface. The overall design is low profile because of the reduced height of the DR. The DR has relative permittivity $\left(\varepsilon_{\mathrm{r}}\right)$ of 15. The dual band design is reconfigured to other four bands with the help of two switching configurations. The resonant frequencies are reconfigured between 1.2 GHz to 6.5 GHz. The substrate FR4 has a thickness of 1.6mm and 0.002 tangent loss. The ground plane has the dimensions of 50×45 mm2. The DR has an height of 2mm. Two ideal switches SI and S2 are placed on the two sides of the feedline. The combination of these two ideal RF PIN diodes is used to obtain three switching arrangements. A fourth possible arrangement is excluded as it disconnects the DRA from the feedline. The switching arrangements are ON-ON, ON-OFF and OFF-ON. In ON-ON state, the two achieved resonance frequencies are 4.27 GHz (WBAN) and 5.64 GHz (WLAN). In ON-OFF state the obtained resonance frequencies are 2.1 GHz (LTE) and 5.47 GHz (WLAN). For ON-OFF state, the two resonance frequencies are 2.16 GHz (LTE) and 5.73 GHz (WLAN). The simulated values for all the switching configuration confirm the potential of the prototype for use in the targeted wireless protocols.