A frequency reconfigurable antenna with six switchable modes for wireless application

Abstract

In this paper, a frequency switchable microstrip patch antenna with defected ground structure is presented. Frequency characteristics of this antenna can be switched between different frequency bands. Reconfigurability is achieved using different slots on ground structure and three PIN diodes loaded onto these slots as switches. By changing the PIN diode states to either ON or OFF, any particular slot on ground structure will be activated, hence making the antenna to be operable in six different modes which serves different frequency bands to be used for different wireless applications. Return loss, VSWR and gain are analyzed for different modes of operation. To design and simulate the proposed antenna CST microwave studio is used.