Dielectric Resonator Loaded Printed Antenna for Cognitive Radio Application

In this paper, a Cylindrical Dielectric Resonator (CDR) loaded printed antenna is presented which is excited by the microstrip feeding technique and is suitable for Cognitive Radio applications. The proposed antenna consists of a leaf-shaped Ultra Wide-Band (UWB) antenna and one reconfigurable antenna. By changing the switching conditions of PIN diodes, the frequency hopping occurs in different ranges of frequencies over 3-11 GHz with suitable gain. The proposed structure operates under the interweave network paradigm. In this paradigm, sensing antenna senses the void spaces available in the spectrum, and the communicating antenna is used for transmission in these void spaces.