Design and Analysis of Frequency Reconfigurable Cylindrical Dielectric Resonator Antenna for Cognitive Radio

This work describes the design of an ultrawideband cylindrical dielectric resonator antenna with frequency reconfigurability for cognitive radio applications. Two PIN diode switches are used to achieve frequency reconfigurability. Four alternative configurations of PIN diode switches are used to control the operation of the antenna. Every configuration received a different application. The same design has also been used as a frequency-reconfigurable antenna for narrow-band coverage within the ultra-wideband. This antenna is also suitable for WiMAX, X-band, and K-band applications. The designed antenna's operating frequency (Configuration 1 to 4) is 1.12-17.77 GHz. The result indicates the 2D radiation patterns at 3.42, 10.65, 15.48, and 2.92 GHz.