A frequency and polarization reconfigurable L shaped patch antenna with defected ground structure

Abstract

A novel geometry of polarization and frequency reconfigurable antenna is proposed in this paper. Proposed antenna consists of an L shaped patch antenna, where arms are separated using PIN-diode. Two parasitic elements, shorted back element and edge tapered defected ground structure with slot are used for achieving wide impedance and axial ratio bandwidth. It acts as circular polarized antenna with 1.183 GHz axial ratio band width and3.09 GHz impedance bandwidth in ON state of both diodes and act as linear polarized frequency reconfigurable antenna at remaining states of diodes.

Compact reconfigurable antenna with pattern diversity for K band applications

“…Ant 3 is dual band antenna and resonate at 18.28 and 23.34 GHz, but again bandwidth is very low. As discussed in Rawal and Rawat, 19 defected and partial ground helps to increase bandwidth; hence, the parametric analysis has been done on ground of Ant 3 as shown in Figure 4. Antenna perturbs good return loss and bandwidth with 2.3 mm ground length.…”