Abstract
There is a continuous demand for wireless devices that can adapt to different channel characteristics, while operating on high transmission data-rates utilizing several communication bands. Cognitive Radio (CR), and Software-Defined Radio (SDR) emerge as a favorable settlement to improve spectrum utilization and maximize the usage of frequency bands between users. CR relies on dynamic resource sharing between primary and secondary users through frequency hopping facilitated by the attached SDR tunable antenna. This paper proposes efficient, flexible antenna array design with reconfigurable frequency bands through radio frequency switches (RF-switches) towards enabling a Software Defined Antenna (SDA). RF-switches are used to enable reconfigurable antennas to manipulate frequency, bandwidth, and directivity. The proposed antenna design is verified using Electromagnetic High Frequency Simulation Software (HFSS) tool. Moreover, we address extensive ON/OFF switching cases to determine the proper selection of RF-switch(s) configurations and types to best serve CR networks. The proposed antenna design can be integrated with programmable kits as front end radio element to dynamically enable band manipulation through software programs. Thence, we exploit a queueing model for better spectrum sharing between CR networks users. Results show the efficiency of using Field Effect Transistor (FET) as RF-switches for the proposed antenna design in CR networks.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: AEU - International Journal of Electronics and Communications
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
