A compact open complementary split ring resonator inspired triband reconfigurable coplanar waveguide fed antenna

Abstract

AbstractThis paper presents the implementation of open complimentary split ring resonator (OCSRR) structure in small rectangular radiating elements to achieve triple band and dual band reconfigurability using PIN diode. The proposed design is a coplanar waveguide fed structure and consists of three small radiating elements, whereas two OCSRR structures are coupled with the two‐radiating elements. The third radiating element embedded with OCSRR is connected using a PIN diode. Under DC biasing conditions the whole design resonates at three frequencies, that is, , , and , whereas the proposed design switches to dual band operation at and in the diode ‘OFF’ state. The proposed structure is designed and fabricated on a single sided ungrounded FR substrate. Overall, a good agreement between simulated and measured results is observed. It is also observed that the radiation patterns of the proposed antenna are the same with gains of , , and at , and in the PIN diode ‘ON’ state, respectively, whereas in the diode ‘OFF’ state, at the gain is and at the gain is .