Frequency Reconfigurable Antenna for Cognitive Radio which is act as a fast switching antenna capable of operating in seven different frequencies in the range of 6.25 to 8.25 GHz[14]. Mohammad M. proposed a Reconfigurable Antenna with Extended U-Slot used as a Switchable Polarization for Wireless Applications. Design of Reconfigurable Band Notches Antenna for Cognitive ... tenna based on a ring slot etched in the patch. In this paper , we propose an antenna for cognitive radio applications. It can be operated as ultra wideband and is reconfigurable in terms of the ability to select a notche d band in the SRR resonant frequency . The rest of the paper is organized as follows. Mohammed Al-Husseini, Karim Y. Kabalan, Ali El-Hajj and ...

A Frequency Reconfigurable Rotatable Antenna Design for Cognitive Radio Systems G. Prema P. Gayatri ... A reconfigurable C-slot microstrip patch antenna is proposed in [4]. The antenna can operate in dual ... diodes which makes it less reliable for cognitive radio applications. Integration problems occur with both RF-

Integrated Cognitive Radio Antenna Using Reconfigurable Band ... reconfigurable antenna for cognitive radio communication. In [1], the authors present a reconfigurable antenna based on photoconductive switches. An UWB antenna is also incorporated for channel sensing. A reconfigurable slot antenna for cognitive radio applications is presented in [2]. Reconfigured and Notched Tapered Slot UWB Antenna for ... A compact reconfigurable and notched ultra-wideband (UWB) tapered slot antenna (TSA) is presented. The antenna reconfiguration operation principle relies on 2 mechanisms: in the first mechanism a resonator parasitic microstrip line electrically coupled to the TSA is used to notch the TSA at a specific frequency and the second mechanism relies on changing the input impedance matching of the ...